upgrade gqlgen to v0.7.1

77 files changed, 7230 insertions, 534 deletions

diff --git a/vendor/github.com/99designs/gqlgen/cmd/gen.go b/vendor/github.com/99designs/gqlgen/cmd/gen.go
new file mode 100644
index 00000000..3842f02b
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/cmd/gen.go
@@ -0,0 +1,60 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/99designs/gqlgen/codegen"
+	"github.com/pkg/errors"
+	"github.com/urfave/cli"
+)
+
+var genCmd = cli.Command{
+	Name:  "generate",
+	Usage: "generate a graphql server based on schema",
+	Flags: []cli.Flag{
+		cli.BoolFlag{Name: "verbose, v", Usage: "show logs"},
+		cli.StringFlag{Name: "config, c", Usage: "the config filename"},
+	},
+	Action: func(ctx *cli.Context) {
+		var config *codegen.Config
+		var err error
+		if configFilename := ctx.String("config"); configFilename != "" {
+			config, err = codegen.LoadConfig(configFilename)
+			if err != nil {
+				fmt.Fprintln(os.Stderr, err.Error())
+				os.Exit(1)
+			}
+		} else {
+			config, err = codegen.LoadConfigFromDefaultLocations()
+			if os.IsNotExist(errors.Cause(err)) {
+				config = codegen.DefaultConfig()
+			} else if err != nil {
+				fmt.Fprintln(os.Stderr, err.Error())
+				os.Exit(1)
+			}
+		}
+
+		for _, filename := range config.SchemaFilename {
+			var schemaRaw []byte
+			schemaRaw, err = ioutil.ReadFile(filename)
+			if err != nil {
+				fmt.Fprintln(os.Stderr, "unable to open schema: "+err.Error())
+				os.Exit(1)
+			}
+			config.SchemaStr[filename] = string(schemaRaw)
+		}
+
+		if err = config.Check(); err != nil {
+			fmt.Fprintln(os.Stderr, "invalid config format: "+err.Error())
+			os.Exit(1)
+		}
+
+		err = codegen.Generate(*config)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err.Error())
+			os.Exit(2)
+		}
+	},
+}
diff --git a/vendor/github.com/99designs/gqlgen/cmd/init.go b/vendor/github.com/99designs/gqlgen/cmd/init.go
new file mode 100644
index 00000000..1e7c18b9
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/cmd/init.go
@@ -0,0 +1,162 @@
+package cmd
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/99designs/gqlgen/codegen"
+	"github.com/pkg/errors"
+	"github.com/urfave/cli"
+	"gopkg.in/yaml.v2"
+)
+
+var configComment = `
+# .gqlgen.yml example
+#
+# Refer to https://gqlgen.com/config/
+# for detailed .gqlgen.yml documentation.
+`
+
+var schemaDefault = `
+# GraphQL schema example
+#
+# https://gqlgen.com/getting-started/
+
+type Todo {
+  id: ID!
+  text: String!
+  done: Boolean!
+  user: User!
+}
+
+type User {
+  id: ID!
+  name: String!
+}
+
+type Query {
+  todos: [Todo!]!
+}
+
+input NewTodo {
+  text: String!
+  userId: String!
+}
+
+type Mutation {
+  createTodo(input: NewTodo!): Todo!
+}
+`
+
+var initCmd = cli.Command{
+	Name:  "init",
+	Usage: "create a new gqlgen project",
+	Flags: []cli.Flag{
+		cli.BoolFlag{Name: "verbose, v", Usage: "show logs"},
+		cli.StringFlag{Name: "config, c", Usage: "the config filename"},
+		cli.StringFlag{Name: "server", Usage: "where to write the server stub to", Value: "server/server.go"},
+		cli.StringFlag{Name: "schema", Usage: "where to write the schema stub to", Value: "schema.graphql"},
+	},
+	Action: func(ctx *cli.Context) {
+		initSchema(ctx.String("schema"))
+		config := initConfig(ctx)
+
+		GenerateGraphServer(config, ctx.String("server"))
+	},
+}
+
+func GenerateGraphServer(config *codegen.Config, serverFilename string) {
+	for _, filename := range config.SchemaFilename {
+		schemaRaw, err := ioutil.ReadFile(filename)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "unable to open schema: "+err.Error())
+			os.Exit(1)
+		}
+		config.SchemaStr[filename] = string(schemaRaw)
+	}
+
+	if err := config.Check(); err != nil {
+		fmt.Fprintln(os.Stderr, "invalid config format: "+err.Error())
+		os.Exit(1)
+	}
+
+	if err := codegen.Generate(*config); err != nil {
+		fmt.Fprintln(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+
+	if err := codegen.GenerateServer(*config, serverFilename); err != nil {
+		fmt.Fprintln(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+
+	fmt.Fprintf(os.Stdout, "Exec \"go run ./%s\" to start GraphQL server\n", serverFilename)
+}
+
+func initConfig(ctx *cli.Context) *codegen.Config {
+	var config *codegen.Config
+	var err error
+	configFilename := ctx.String("config")
+	if configFilename != "" {
+		config, err = codegen.LoadConfig(configFilename)
+	} else {
+		config, err = codegen.LoadConfigFromDefaultLocations()
+	}
+
+	if config != nil {
+		fmt.Fprintf(os.Stderr, "init failed: a configuration file already exists at %s\n", config.FilePath)
+		os.Exit(1)
+	}
+
+	if !os.IsNotExist(errors.Cause(err)) {
+		fmt.Fprintln(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+
+	if configFilename == "" {
+		configFilename = "gqlgen.yml"
+	}
+	config = codegen.DefaultConfig()
+
+	config.Resolver = codegen.PackageConfig{
+		Filename: "resolver.go",
+		Type:     "Resolver",
+	}
+
+	var buf bytes.Buffer
+	buf.WriteString(strings.TrimSpace(configComment))
+	buf.WriteString("\n\n")
+	{
+		var b []byte
+		b, err = yaml.Marshal(config)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, "unable to marshal yaml: "+err.Error())
+			os.Exit(1)
+		}
+		buf.Write(b)
+	}
+
+	err = ioutil.WriteFile(configFilename, buf.Bytes(), 0644)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "unable to write config file: "+err.Error())
+		os.Exit(1)
+	}
+
+	return config
+}
+
+func initSchema(schemaFilename string) {
+	_, err := os.Stat(schemaFilename)
+	if !os.IsNotExist(err) {
+		return
+	}
+
+	err = ioutil.WriteFile(schemaFilename, []byte(strings.TrimSpace(schemaDefault)), 0644)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "unable to write schema file: "+err.Error())
+		os.Exit(1)
+	}
+}
diff --git a/vendor/github.com/99designs/gqlgen/cmd/root.go b/vendor/github.com/99designs/gqlgen/cmd/root.go
new file mode 100644
index 00000000..519c2e1a
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/cmd/root.go
@@ -0,0 +1,53 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/99designs/gqlgen/graphql"
+	"github.com/99designs/gqlgen/internal/gopath"
+	"github.com/urfave/cli"
+
+	// Required since otherwise dep will prune away these unused packages before codegen has a chance to run
+	_ "github.com/99designs/gqlgen/handler"
+)
+
+func Execute() {
+	app := cli.NewApp()
+	app.Name = "gqlgen"
+	app.Usage = genCmd.Usage
+	app.Description = "This is a library for quickly creating strictly typed graphql servers in golang. See https://gqlgen.com/ for a getting started guide."
+	app.HideVersion = true
+	app.Flags = genCmd.Flags
+	app.Version = graphql.Version
+	app.Before = func(context *cli.Context) error {
+		pwd, err := os.Getwd()
+		if err != nil {
+			return fmt.Errorf("unable to determine current workding dir: %s\n", err.Error())
+		}
+
+		if !gopath.Contains(pwd) {
+			return fmt.Errorf("gqlgen must be run from inside your $GOPATH\n")
+		}
+		if context.Bool("verbose") {
+			log.SetFlags(0)
+		} else {
+			log.SetOutput(ioutil.Discard)
+		}
+		return nil
+	}
+
+	app.Action = genCmd.Action
+	app.Commands = []cli.Command{
+		genCmd,
+		initCmd,
+		versionCmd,
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+}
diff --git a/vendor/github.com/99designs/gqlgen/cmd/version.go b/vendor/github.com/99designs/gqlgen/cmd/version.go
new file mode 100644
index 00000000..8b7442d4
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/cmd/version.go
@@ -0,0 +1,16 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/99designs/gqlgen/graphql"
+	"github.com/urfave/cli"
+)
+
+var versionCmd = cli.Command{
+	Name:  "version",
+	Usage: "print the version string",
+	Action: func(ctx *cli.Context) {
+		fmt.Println(graphql.Version)
+	},
+}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/ambient.go b/vendor/github.com/99designs/gqlgen/codegen/ambient.go
new file mode 100644
index 00000000..c9909fcc
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/codegen/ambient.go
@@ -0,0 +1,10 @@
+package codegen
+
+import (
+	// Import and ignore the ambient imports listed below so dependency managers
+	// don't prune unused code for us. Both lists should be kept in sync.
+	_ "github.com/99designs/gqlgen/graphql"
+	_ "github.com/99designs/gqlgen/graphql/introspection"
+	_ "github.com/vektah/gqlparser"
+	_ "github.com/vektah/gqlparser/ast"
+)
diff --git a/vendor/github.com/99designs/gqlgen/codegen/build.go b/vendor/github.com/99designs/gqlgen/codegen/build.go
index 42dedbf8..582689a7 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/build.go
@@ -15,25 +15,22 @@ type Build struct {
 	Objects          Objects
 	Inputs           Objects
 	Interfaces       []*Interface
-	Imports          []*Import
 	QueryRoot        *Object
 	MutationRoot     *Object
 	SubscriptionRoot *Object
-	SchemaRaw        string
-	SchemaFilename   string
+	SchemaRaw        map[string]string
+	SchemaFilename   SchemaFilenames
 	Directives       []*Directive
 }
 
 type ModelBuild struct {
 	PackageName string
-	Imports     []*Import
 	Models      []Model
 	Enums       []Enum
 }
 
 type ResolverBuild struct {
 	PackageName   string
-	Imports       []*Import
 	ResolverType  string
 	Objects       Objects
 	ResolverFound bool
@@ -41,7 +38,6 @@ type ResolverBuild struct {
 
 type ServerBuild struct {
 	PackageName         string
-	Imports             []*Import
 	ExecPackageName     string
 	ResolverPackageName string
 }
@@ -50,16 +46,16 @@ type ServerBuild struct {
 func (cfg *Config) models() (*ModelBuild, error) {
 	namedTypes := cfg.buildNamedTypes()
 
-	progLoader := newLoader(namedTypes, true)
+	progLoader := cfg.newLoaderWithoutErrors()
+
 	prog, err := progLoader.Load()
 	if err != nil {
 		return nil, errors.Wrap(err, "loading failed")
 	}
-	imports := buildImports(namedTypes, cfg.Model.Dir())
 
-	cfg.bindTypes(imports, namedTypes, cfg.Model.Dir(), prog)
+	cfg.bindTypes(namedTypes, cfg.Model.Dir(), prog)
 
-	models, err := cfg.buildModels(namedTypes, prog, imports)
+	models, err := cfg.buildModels(namedTypes, prog)
 	if err != nil {
 		return nil, err
 	}
@@ -67,13 +63,12 @@ func (cfg *Config) models() (*ModelBuild, error) {
 		PackageName: cfg.Model.Package,
 		Models:      models,
 		Enums:       cfg.buildEnums(namedTypes),
-		Imports:     imports.finalize(),
 	}, nil
 }
 
 // bind a schema together with some code to generate a Build
 func (cfg *Config) resolver() (*ResolverBuild, error) {
-	progLoader := newLoader(cfg.buildNamedTypes(), true)
+	progLoader := cfg.newLoaderWithoutErrors()
 	progLoader.Import(cfg.Resolver.ImportPath())
 
 	prog, err := progLoader.Load()
@@ -84,13 +79,10 @@ func (cfg *Config) resolver() (*ResolverBuild, error) {
 	destDir := cfg.Resolver.Dir()
 
 	namedTypes := cfg.buildNamedTypes()
-	imports := buildImports(namedTypes, destDir)
-	imports.add(cfg.Exec.ImportPath())
-	imports.add("github.com/99designs/gqlgen/handler") // avoid import github.com/vektah/gqlgen/handler
 
-	cfg.bindTypes(imports, namedTypes, destDir, prog)
+	cfg.bindTypes(namedTypes, destDir, prog)
 
-	objects, err := cfg.buildObjects(namedTypes, prog, imports)
+	objects, err := cfg.buildObjects(namedTypes, prog)
 	if err != nil {
 		return nil, err
 	}
@@ -100,7 +92,6 @@ func (cfg *Config) resolver() (*ResolverBuild, error) {
 
 	return &ResolverBuild{
 		PackageName:   cfg.Resolver.Package,
-		Imports:       imports.finalize(),
 		Objects:       objects,
 		ResolverType:  cfg.Resolver.Type,
 		ResolverFound: resolverFound,
@@ -108,15 +99,10 @@ func (cfg *Config) resolver() (*ResolverBuild, error) {
 }
 
 func (cfg *Config) server(destDir string) *ServerBuild {
-	imports := buildImports(NamedTypes{}, destDir)
-	imports.add(cfg.Exec.ImportPath())
-	imports.add(cfg.Resolver.ImportPath())
-
 	return &ServerBuild{
 		PackageName:         cfg.Resolver.Package,
-		Imports:             imports.finalize(),
-		ExecPackageName:     cfg.Exec.Package,
-		ResolverPackageName: cfg.Resolver.Package,
+		ExecPackageName:     cfg.Exec.ImportPath(),
+		ResolverPackageName: cfg.Resolver.ImportPath(),
 	}
 }
 
@@ -124,21 +110,20 @@ func (cfg *Config) server(destDir string) *ServerBuild {
 func (cfg *Config) bind() (*Build, error) {
 	namedTypes := cfg.buildNamedTypes()
 
-	progLoader := newLoader(namedTypes, true)
+	progLoader := cfg.newLoaderWithoutErrors()
 	prog, err := progLoader.Load()
 	if err != nil {
 		return nil, errors.Wrap(err, "loading failed")
 	}
 
-	imports := buildImports(namedTypes, cfg.Exec.Dir())
-	cfg.bindTypes(imports, namedTypes, cfg.Exec.Dir(), prog)
+	cfg.bindTypes(namedTypes, cfg.Exec.Dir(), prog)
 
-	objects, err := cfg.buildObjects(namedTypes, prog, imports)
+	objects, err := cfg.buildObjects(namedTypes, prog)
 	if err != nil {
 		return nil, err
 	}
 
-	inputs, err := cfg.buildInputs(namedTypes, prog, imports)
+	inputs, err := cfg.buildInputs(namedTypes, prog)
 	if err != nil {
 		return nil, err
 	}
@@ -152,7 +137,6 @@ func (cfg *Config) bind() (*Build, error) {
 		Objects:        objects,
 		Interfaces:     cfg.buildInterfaces(namedTypes, prog),
 		Inputs:         inputs,
-		Imports:        imports.finalize(),
 		SchemaRaw:      cfg.SchemaStr,
 		SchemaFilename: cfg.SchemaFilename,
 		Directives:     directives,
@@ -175,29 +159,25 @@ func (cfg *Config) bind() (*Build, error) {
 }
 
 func (cfg *Config) validate() error {
-	progLoader := newLoader(cfg.buildNamedTypes(), false)
+	progLoader := cfg.newLoaderWithErrors()
 	_, err := progLoader.Load()
 	return err
 }
 
-func newLoader(namedTypes NamedTypes, allowErrors bool) loader.Config {
+func (cfg *Config) newLoaderWithErrors() loader.Config {
 	conf := loader.Config{}
-	if allowErrors {
-		conf = loader.Config{
-			AllowErrors: true,
-			TypeChecker: types.Config{
-				Error: func(e error) {},
-			},
-		}
-	}
-	for _, imp := range ambientImports {
-		conf.Import(imp)
-	}
-
-	for _, imp := range namedTypes {
-		if imp.Package != "" {
-			conf.Import(imp.Package)
-		}
+
+	for _, pkg := range cfg.Models.referencedPackages() {
+		conf.Import(pkg)
+	}
+	return conf
+}
+
+func (cfg *Config) newLoaderWithoutErrors() loader.Config {
+	conf := cfg.newLoaderWithErrors()
+	conf.AllowErrors = true
+	conf.TypeChecker = types.Config{
+		Error: func(e error) {},
 	}
 	return conf
 }
diff --git a/vendor/github.com/99designs/gqlgen/codegen/codegen.go b/vendor/github.com/99designs/gqlgen/codegen/codegen.go
index 27873400..773e3db7 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/codegen.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/codegen.go
@@ -151,8 +151,13 @@ func (cfg *Config) normalize() error {
 		}
 	}
 
+	var sources []*ast.Source
+	for _, filename := range cfg.SchemaFilename {
+		sources = append(sources, &ast.Source{Name: filename, Input: cfg.SchemaStr[filename]})
+	}
+
 	var err *gqlerror.Error
-	cfg.schema, err = gqlparser.LoadSchema(&ast.Source{Name: cfg.SchemaFilename, Input: cfg.SchemaStr})
+	cfg.schema, err = gqlparser.LoadSchema(sources...)
 	if err != nil {
 		return err
 	}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/config.go b/vendor/github.com/99designs/gqlgen/codegen/config.go
index db0e467b..f9df24fb 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/config.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/config.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"sort"
 	"strings"
 
 	"github.com/99designs/gqlgen/internal/gopath"
@@ -19,7 +20,8 @@ var cfgFilenames = []string{".gqlgen.yml", "gqlgen.yml", "gqlgen.yaml"}
 // DefaultConfig creates a copy of the default config
 func DefaultConfig() *Config {
 	return &Config{
-		SchemaFilename: "schema.graphql",
+		SchemaFilename: SchemaFilenames{"schema.graphql"},
+		SchemaStr:      map[string]string{},
 		Model:          PackageConfig{Filename: "models_gen.go"},
 		Exec:           PackageConfig{Filename: "generated.go"},
 	}
@@ -53,19 +55,36 @@ func LoadConfig(filename string) (*Config, error) {
 		return nil, errors.Wrap(err, "unable to parse config")
 	}
 
+	preGlobbing := config.SchemaFilename
+	config.SchemaFilename = SchemaFilenames{}
+	for _, f := range preGlobbing {
+		matches, err := filepath.Glob(f)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to glob schema filename %s", f)
+		}
+
+		for _, m := range matches {
+			if config.SchemaFilename.Has(m) {
+				continue
+			}
+			config.SchemaFilename = append(config.SchemaFilename, m)
+		}
+	}
+
 	config.FilePath = filename
+	config.SchemaStr = map[string]string{}
 
 	return config, nil
 }
 
 type Config struct {
-	SchemaFilename string        `yaml:"schema,omitempty"`
-	SchemaStr      string        `yaml:"-"`
-	Exec           PackageConfig `yaml:"exec"`
-	Model          PackageConfig `yaml:"model"`
-	Resolver       PackageConfig `yaml:"resolver,omitempty"`
-	Models         TypeMap       `yaml:"models,omitempty"`
-	StructTag      string        `yaml:"struct_tag,omitempty"`
+	SchemaFilename SchemaFilenames   `yaml:"schema,omitempty"`
+	SchemaStr      map[string]string `yaml:"-"`
+	Exec           PackageConfig     `yaml:"exec"`
+	Model          PackageConfig     `yaml:"model"`
+	Resolver       PackageConfig     `yaml:"resolver,omitempty"`
+	Models         TypeMap           `yaml:"models,omitempty"`
+	StructTag      string            `yaml:"struct_tag,omitempty"`
 
 	FilePath string `yaml:"-"`
 
@@ -84,8 +103,37 @@ type TypeMapEntry struct {
 }
 
 type TypeMapField struct {
-	Resolver   bool   `yaml:"resolver"`
-	FieldName  string `yaml:"fieldName"`
+	Resolver  bool   `yaml:"resolver"`
+	FieldName string `yaml:"fieldName"`
+}
+
+type SchemaFilenames []string
+
+func (a *SchemaFilenames) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var single string
+	err := unmarshal(&single)
+	if err == nil {
+		*a = []string{single}
+		return nil
+	}
+
+	var multi []string
+	err = unmarshal(&multi)
+	if err != nil {
+		return err
+	}
+
+	*a = multi
+	return nil
+}
+
+func (a SchemaFilenames) Has(file string) bool {
+	for _, existing := range a {
+		if existing == file {
+			return true
+		}
+	}
+	return false
 }
 
 func (c *PackageConfig) normalize() error {
@@ -162,6 +210,36 @@ func (tm TypeMap) Check() error {
 	return nil
 }
 
+func (tm TypeMap) referencedPackages() []string {
+	var pkgs []string
+
+	for _, typ := range tm {
+		if typ.Model == "map[string]interface{}" {
+			continue
+		}
+		pkg, _ := pkgAndType(typ.Model)
+		if pkg == "" || inStrSlice(pkgs, pkg) {
+			continue
+		}
+		pkgs = append(pkgs, pkg)
+	}
+
+	sort.Slice(pkgs, func(i, j int) bool {
+		return pkgs[i] > pkgs[j]
+	})
+	return pkgs
+}
+
+func inStrSlice(haystack []string, needle string) bool {
+	for _, v := range haystack {
+		if needle == v {
+			return true
+		}
+	}
+
+	return false
+}
+
 // findCfg searches for the config file in this directory and all parents up the tree
 // looking for the closest match
 func findCfg() (string, error) {
diff --git a/vendor/github.com/99designs/gqlgen/codegen/directive_build.go b/vendor/github.com/99designs/gqlgen/codegen/directive_build.go
index 32828841..af77dc44 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/directive_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/directive_build.go
@@ -32,7 +32,6 @@ func (cfg *Config) buildDirectives(types NamedTypes) ([]*Directive, error) {
 				if err != nil {
 					return nil, errors.Errorf("default value for directive argument %s(%s) is not valid: %s", dir.Name, arg.Name, err.Error())
 				}
-				newArg.StripPtr()
 			}
 			args = append(args, newArg)
 		}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/import.go b/vendor/github.com/99designs/gqlgen/codegen/import.go
deleted file mode 100644
index b511e8f6..00000000
--- a/vendor/github.com/99designs/gqlgen/codegen/import.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package codegen
-
-import (
-	"strconv"
-)
-
-type Import struct {
-	Name string
-	Path string
-
-	alias string
-}
-
-type Imports struct {
-	imports []*Import
-	destDir string
-}
-
-func (i *Import) Write() string {
-	return i.Alias() + " " + strconv.Quote(i.Path)
-}
-
-func (i *Import) Alias() string {
-	if i.alias == "" {
-		panic("alias called before imports are finalized")
-	}
-
-	return i.alias
-}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/import_build.go b/vendor/github.com/99designs/gqlgen/codegen/import_build.go
deleted file mode 100644
index d634834e..00000000
--- a/vendor/github.com/99designs/gqlgen/codegen/import_build.go
+++ /dev/null
@@ -1,120 +0,0 @@
-package codegen
-
-import (
-	"fmt"
-	"go/build"
-	"sort"
-	"strconv"
-
-	// Import and ignore the ambient imports listed below so dependency managers
-	// don't prune unused code for us. Both lists should be kept in sync.
-	_ "github.com/99designs/gqlgen/graphql"
-	_ "github.com/99designs/gqlgen/graphql/introspection"
-	"github.com/99designs/gqlgen/internal/gopath"
-	_ "github.com/vektah/gqlparser"
-	_ "github.com/vektah/gqlparser/ast"
-)
-
-// These imports are referenced by the generated code, and are assumed to have the
-// default alias. So lets make sure they get added first, and any later collisions get
-// renamed.
-var ambientImports = []string{
-	"context",
-	"fmt",
-	"io",
-	"strconv",
-	"time",
-	"sync",
-	"errors",
-
-	"github.com/vektah/gqlparser",
-	"github.com/vektah/gqlparser/ast",
-	"github.com/99designs/gqlgen/graphql",
-	"github.com/99designs/gqlgen/graphql/introspection",
-}
-
-func buildImports(types NamedTypes, destDir string) *Imports {
-	imports := Imports{
-		destDir: destDir,
-	}
-
-	for _, ambient := range ambientImports {
-		imports.add(ambient)
-	}
-
-	// Imports from top level user types
-	for _, t := range types {
-		t.Import = imports.add(t.Package)
-	}
-
-	return &imports
-}
-
-func (s *Imports) add(path string) *Import {
-	if path == "" {
-		return nil
-	}
-
-	// if we are referencing our own package we dont need an import
-	if gopath.MustDir2Import(s.destDir) == path {
-		return nil
-	}
-
-	if existing := s.findByPath(path); existing != nil {
-		return existing
-	}
-
-	pkg, err := build.Default.Import(path, s.destDir, 0)
-	if err != nil {
-		panic(err)
-	}
-
-	imp := &Import{
-		Name: pkg.Name,
-		Path: path,
-	}
-	s.imports = append(s.imports, imp)
-
-	return imp
-}
-
-func (s Imports) finalize() []*Import {
-	// ensure stable ordering by sorting
-	sort.Slice(s.imports, func(i, j int) bool {
-		return s.imports[i].Path > s.imports[j].Path
-	})
-
-	for _, imp := range s.imports {
-		alias := imp.Name
-
-		i := 1
-		for s.findByAlias(alias) != nil {
-			alias = imp.Name + strconv.Itoa(i)
-			i++
-			if i > 10 {
-				panic(fmt.Errorf("too many collisions, last attempt was %s", alias))
-			}
-		}
-		imp.alias = alias
-	}
-
-	return s.imports
-}
-
-func (s Imports) findByPath(importPath string) *Import {
-	for _, imp := range s.imports {
-		if imp.Path == importPath {
-			return imp
-		}
-	}
-	return nil
-}
-
-func (s Imports) findByAlias(alias string) *Import {
-	for _, imp := range s.imports {
-		if imp.alias == alias {
-			return imp
-		}
-	}
-	return nil
-}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/input_build.go b/vendor/github.com/99designs/gqlgen/codegen/input_build.go
index 06ff37a0..70fa564d 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/input_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/input_build.go
@@ -9,7 +9,7 @@ import (
 	"golang.org/x/tools/go/loader"
 )
 
-func (cfg *Config) buildInputs(namedTypes NamedTypes, prog *loader.Program, imports *Imports) (Objects, error) {
+func (cfg *Config) buildInputs(namedTypes NamedTypes, prog *loader.Program) (Objects, error) {
 	var inputs Objects
 
 	for _, typ := range cfg.schema.Types {
@@ -26,7 +26,7 @@ func (cfg *Config) buildInputs(namedTypes NamedTypes, prog *loader.Program, impo
 			}
 			if def != nil {
 				input.Marshaler = buildInputMarshaler(typ, def)
-				bindErrs := bindObject(def.Type(), input, imports, cfg.StructTag)
+				bindErrs := bindObject(def.Type(), input, cfg.StructTag)
 				if len(bindErrs) > 0 {
 					return nil, bindErrs
 				}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/interface_build.go b/vendor/github.com/99designs/gqlgen/codegen/interface_build.go
index 9f4a4ff4..92052ba6 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/interface_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/interface_build.go
@@ -1,9 +1,7 @@
 package codegen
 
 import (
-	"fmt"
 	"go/types"
-	"os"
 	"sort"
 
 	"github.com/vektah/gqlparser/ast"
@@ -51,20 +49,5 @@ func (cfg *Config) isValueReceiver(intf *NamedType, implementor *NamedType, prog
 		return true
 	}
 
-	for i := 0; i < interfaceType.NumMethods(); i++ {
-		intfMethod := interfaceType.Method(i)
-
-		implMethod := findMethod(implementorType, intfMethod.Name())
-		if implMethod == nil {
-			fmt.Fprintf(os.Stderr, "missing method %s on %s\n", intfMethod.Name(), implementor.GoType)
-			return false
-		}
-
-		sig := implMethod.Type().(*types.Signature)
-		if _, isPtr := sig.Recv().Type().(*types.Pointer); isPtr {
-			return false
-		}
-	}
-
-	return true
+	return types.Implements(implementorType, interfaceType)
 }
diff --git a/vendor/github.com/99designs/gqlgen/codegen/model.go b/vendor/github.com/99designs/gqlgen/codegen/model.go
index 5ba50337..bcdc8703 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/model.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/model.go
@@ -4,6 +4,7 @@ type Model struct {
 	*NamedType
 	Description string
 	Fields      []ModelField
+	Implements  []*NamedType
 }
 
 type ModelField struct {
diff --git a/vendor/github.com/99designs/gqlgen/codegen/models_build.go b/vendor/github.com/99designs/gqlgen/codegen/models_build.go
index 9f98a07d..56d2ff1f 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/models_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/models_build.go
@@ -7,14 +7,14 @@ import (
 	"golang.org/x/tools/go/loader"
 )
 
-func (cfg *Config) buildModels(types NamedTypes, prog *loader.Program, imports *Imports) ([]Model, error) {
+func (cfg *Config) buildModels(types NamedTypes, prog *loader.Program) ([]Model, error) {
 	var models []Model
 
 	for _, typ := range cfg.schema.Types {
 		var model Model
 		switch typ.Kind {
 		case ast.Object:
-			obj, err := cfg.buildObject(types, typ, imports)
+			obj, err := cfg.buildObject(types, typ)
 			if err != nil {
 				return nil, err
 			}
@@ -54,8 +54,9 @@ func (cfg *Config) buildModels(types NamedTypes, prog *loader.Program, imports *
 
 func (cfg *Config) obj2Model(obj *Object) Model {
 	model := Model{
-		NamedType: obj.NamedType,
-		Fields:    []ModelField{},
+		NamedType:  obj.NamedType,
+		Implements: obj.Implements,
+		Fields:     []ModelField{},
 	}
 
 	model.GoType = ucFirst(obj.GQLType)
diff --git a/vendor/github.com/99designs/gqlgen/codegen/object.go b/vendor/github.com/99designs/gqlgen/codegen/object.go
index d9f610f4..656af297 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/object.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/object.go
@@ -24,6 +24,7 @@ type Object struct {
 
 	Fields             []Field
 	Satisfies          []string
+	Implements         []*NamedType
 	ResolverInterface  *Ref
 	Root               bool
 	DisableConcurrency bool
@@ -32,16 +33,17 @@ type Object struct {
 
 type Field struct {
 	*Type
-	Description    string          // Description of a field
-	GQLName        string          // The name of the field in graphql
-	GoFieldType    GoFieldType     // The field type in go, if any
-	GoReceiverName string          // The name of method & var receiver in go, if any
-	GoFieldName    string          // The name of the method or var in go, if any
-	Args           []FieldArgument // A list of arguments to be passed to this field
-	ForceResolver  bool            // Should be emit Resolver method
-	NoErr          bool            // If this is bound to a go method, does that method have an error as the second argument
-	Object         *Object         // A link back to the parent object
-	Default        interface{}     // The default value
+	Description      string          // Description of a field
+	GQLName          string          // The name of the field in graphql
+	GoFieldType      GoFieldType     // The field type in go, if any
+	GoReceiverName   string          // The name of method & var receiver in go, if any
+	GoFieldName      string          // The name of the method or var in go, if any
+	Args             []FieldArgument // A list of arguments to be passed to this field
+	ForceResolver    bool            // Should be emit Resolver method
+	MethodHasContext bool            // If this is bound to a go method, does the method also take a context
+	NoErr            bool            // If this is bound to a go method, does that method have an error as the second argument
+	Object           *Object         // A link back to the parent object
+	Default          interface{}     // The default value
 }
 
 type FieldArgument struct {
@@ -102,7 +104,10 @@ func (f *Field) IsVariable() bool {
 }
 
 func (f *Field) IsConcurrent() bool {
-	return f.IsResolver() && !f.Object.DisableConcurrency
+	if f.Object.DisableConcurrency {
+		return false
+	}
+	return f.MethodHasContext || f.IsResolver()
 }
 
 func (f *Field) GoNameExported() string {
@@ -203,11 +208,15 @@ func (f *Field) CallArgs() string {
 	var args []string
 
 	if f.IsResolver() {
-		args = append(args, "ctx")
+		args = append(args, "rctx")
 
 		if !f.Object.Root {
 			args = append(args, "obj")
 		}
+	} else {
+		if f.MethodHasContext {
+			args = append(args, "ctx")
+		}
 	}
 
 	for _, arg := range f.Args {
diff --git a/vendor/github.com/99designs/gqlgen/codegen/object_build.go b/vendor/github.com/99designs/gqlgen/codegen/object_build.go
index ee2b2f1c..279d1eb6 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/object_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/object_build.go
@@ -9,7 +9,7 @@ import (
 	"golang.org/x/tools/go/loader"
 )
 
-func (cfg *Config) buildObjects(types NamedTypes, prog *loader.Program, imports *Imports) (Objects, error) {
+func (cfg *Config) buildObjects(types NamedTypes, prog *loader.Program) (Objects, error) {
 	var objects Objects
 
 	for _, typ := range cfg.schema.Types {
@@ -17,7 +17,7 @@ func (cfg *Config) buildObjects(types NamedTypes, prog *loader.Program, imports
 			continue
 		}
 
-		obj, err := cfg.buildObject(types, typ, imports)
+		obj, err := cfg.buildObject(types, typ)
 		if err != nil {
 			return nil, err
 		}
@@ -27,7 +27,7 @@ func (cfg *Config) buildObjects(types NamedTypes, prog *loader.Program, imports
 			return nil, err
 		}
 		if def != nil {
-			for _, bindErr := range bindObject(def.Type(), obj, imports, cfg.StructTag) {
+			for _, bindErr := range bindObject(def.Type(), obj, cfg.StructTag) {
 				log.Println(bindErr.Error())
 				log.Println("  Adding resolver method")
 			}
@@ -81,12 +81,11 @@ func sanitizeArgName(name string) string {
 	return name
 }
 
-func (cfg *Config) buildObject(types NamedTypes, typ *ast.Definition, imports *Imports) (*Object, error) {
+func (cfg *Config) buildObject(types NamedTypes, typ *ast.Definition) (*Object, error) {
 	obj := &Object{NamedType: types[typ.Name]}
 	typeEntry, entryExists := cfg.Models[typ.Name]
 
-	imp := imports.findByPath(cfg.Exec.ImportPath())
-	obj.ResolverInterface = &Ref{GoType: obj.GQLType + "Resolver", Import: imp}
+	obj.ResolverInterface = &Ref{GoType: obj.GQLType + "Resolver"}
 
 	if typ == cfg.schema.Query {
 		obj.Root = true
@@ -104,12 +103,15 @@ func (cfg *Config) buildObject(types NamedTypes, typ *ast.Definition, imports *I
 
 	obj.Satisfies = append(obj.Satisfies, typ.Interfaces...)
 
+	for _, intf := range cfg.schema.GetImplements(typ) {
+		obj.Implements = append(obj.Implements, types[intf.Name])
+	}
+
 	for _, field := range typ.Fields {
 		if typ == cfg.schema.Query && field.Name == "__type" {
 			obj.Fields = append(obj.Fields, Field{
 				Type:           &Type{types["__Schema"], []string{modPtr}, ast.NamedType("__Schema", nil), nil},
 				GQLName:        "__schema",
-				NoErr:          true,
 				GoFieldType:    GoFieldMethod,
 				GoReceiverName: "ec",
 				GoFieldName:    "introspectSchema",
@@ -122,7 +124,6 @@ func (cfg *Config) buildObject(types NamedTypes, typ *ast.Definition, imports *I
 			obj.Fields = append(obj.Fields, Field{
 				Type:           &Type{types["__Type"], []string{modPtr}, ast.NamedType("__Schema", nil), nil},
 				GQLName:        "__type",
-				NoErr:          true,
 				GoFieldType:    GoFieldMethod,
 				GoReceiverName: "ec",
 				GoFieldName:    "introspectType",
@@ -162,7 +163,6 @@ func (cfg *Config) buildObject(types NamedTypes, typ *ast.Definition, imports *I
 				if err != nil {
 					return nil, errors.Errorf("default value for %s.%s is not valid: %s", typ.Name, field.Name, err.Error())
 				}
-				newArg.StripPtr()
 			}
 			args = append(args, newArg)
 		}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/data.go b/vendor/github.com/99designs/gqlgen/codegen/templates/data.go
index d168fa31..d3098aaa 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/data.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/data.go
@@ -2,12 +2,12 @@ package templates
 
 var data = map[string]string{
 	"args.gotpl":      "\targs := map[string]interface{}{}\n\t{{- range $i, $arg := . }}\n\t\tvar arg{{$i}} {{$arg.Signature }}\n\t\tif tmp, ok := rawArgs[{{$arg.GQLName|quote}}]; ok {\n\t\t\tvar err error\n\t\t\t{{$arg.Unmarshal (print \"arg\" $i) \"tmp\" }}\n\t\t\tif err != nil {\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t}\n\t\targs[{{$arg.GQLName|quote}}] = arg{{$i}}\n\t{{- end }}\n\treturn args, nil\n",
-	"field.gotpl":     "{{ $field := . }}\n{{ $object := $field.Object }}\n\n{{- if $object.Stream }}\n\tfunc (ec *executionContext) _{{$object.GQLType}}_{{$field.GQLName}}(ctx context.Context, field graphql.CollectedField) func() graphql.Marshaler {\n\t\t{{- if $field.Args }}\n\t\t\trawArgs := field.ArgumentMap(ec.Variables)\n\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\tif err != nil {\n\t\t\t\tec.Error(ctx, err)\n\t\t\t\treturn nil\n\t\t\t}\n\t\t{{- end }}\n\t\tctx = graphql.WithResolverContext(ctx, &graphql.ResolverContext{\n\t\t\tField: field,\n\t\t})\n\t\tresults, err := ec.resolvers.{{ $field.ShortInvocation }}\n\t\tif err != nil {\n\t\t\tec.Error(ctx, err)\n\t\t\treturn nil\n\t\t}\n\t\treturn func() graphql.Marshaler {\n\t\t\tres, ok := <-results\n\t\t\tif !ok {\n\t\t\t\treturn nil\n\t\t\t}\n\t\t\tvar out graphql.OrderedMap\n\t\t\tout.Add(field.Alias, func() graphql.Marshaler { {{ $field.WriteJson }} }())\n\t\t\treturn &out\n\t\t}\n\t}\n{{ else }}\n\t// nolint: vetshadow\n\tfunc (ec *executionContext) _{{$object.GQLType}}_{{$field.GQLName}}(ctx context.Context, field graphql.CollectedField, {{if not $object.Root}}obj *{{$object.FullName}}{{end}}) graphql.Marshaler {\n\t\t{{- if $field.Args }}\n\t\t\trawArgs := field.ArgumentMap(ec.Variables)\n\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\tif err != nil {\n\t\t\t\tec.Error(ctx, err)\n\t\t\t\treturn graphql.Null\n\t\t\t}\n\t\t{{- end }}\n\t\trctx := &graphql.ResolverContext{\n\t\t\tObject: {{$object.GQLType|quote}},\n\t\t\tArgs: {{if $field.Args }}args{{else}}nil{{end}},\n\t\t\tField: field,\n\t\t}\n\t\tctx = graphql.WithResolverContext(ctx, rctx)\n\t\tresTmp := ec.FieldMiddleware(ctx, {{if $object.Root}}nil{{else}}obj{{end}}, func(ctx context.Context) (interface{}, error) {\n\t\t\t{{- if $field.IsResolver }}\n\t\t\t\treturn ec.resolvers.{{ $field.ShortInvocation }}\n\t\t\t{{- else if $field.IsMethod }}\n\t\t\t\t{{- if $field.NoErr }}\n\t\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}({{ $field.CallArgs }}), nil\n\t\t\t\t{{- else }}\n\t\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}({{ $field.CallArgs }})\n\t\t\t\t{{- end }}\n\t\t\t{{- else if $field.IsVariable }}\n\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}, nil\n\t\t\t{{- end }}\n\t\t})\n\t\tif resTmp == nil {\n\t\t\t{{- if $field.ASTType.NonNull }}\n\t\t\t\tif !ec.HasError(rctx) {\n\t\t\t\t\tec.Errorf(ctx, \"must not be null\")\n\t\t\t\t}\n\t\t\t{{- end }}\n\t\t\treturn graphql.Null\n\t\t}\n\t\tres := resTmp.({{$field.Signature}})\n\t\trctx.Result = res\n\t\t{{ $field.WriteJson }}\n\t}\n{{ end }}\n",
-	"generated.gotpl": "// Code generated by github.com/99designs/gqlgen, DO NOT EDIT.\n\npackage {{ .PackageName }}\n\nimport (\n{{- range $import := .Imports }}\n\t{{- $import.Write }}\n{{ end }}\n)\n\n// NewExecutableSchema creates an ExecutableSchema from the ResolverRoot interface.\nfunc NewExecutableSchema(cfg Config) graphql.ExecutableSchema {\n\treturn &executableSchema{\n\t\tresolvers: cfg.Resolvers,\n\t\tdirectives: cfg.Directives,\n\t\tcomplexity: cfg.Complexity,\n\t}\n}\n\ntype Config struct {\n\tResolvers  ResolverRoot\n\tDirectives DirectiveRoot\n\tComplexity ComplexityRoot\n}\n\ntype ResolverRoot interface {\n{{- range $object := .Objects -}}\n\t{{ if $object.HasResolvers -}}\n\t\t{{$object.GQLType}}() {{$object.GQLType}}Resolver\n\t{{ end }}\n{{- end }}\n}\n\ntype DirectiveRoot struct {\n{{ range $directive := .Directives }}\n\t{{ $directive.Declaration }}\n{{ end }}\n}\n\ntype ComplexityRoot struct {\n{{ range $object := .Objects }}\n\t{{ if not $object.IsReserved -}}\n\t\t{{ $object.GQLType|toCamel }} struct {\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{ if not $field.IsReserved -}}\n\t\t\t\t{{ $field.GQLName|toCamel }} {{ $field.ComplexitySignature }}\n\t\t\t{{ end }}\n\t\t{{- end }}\n\t\t}\n\t{{- end }}\n{{ end }}\n}\n\n{{ range $object := .Objects -}}\n\t{{ if $object.HasResolvers }}\n\t\ttype {{$object.GQLType}}Resolver interface {\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{ $field.ShortResolverDeclaration }}\n\t\t{{ end }}\n\t\t}\n\t{{- end }}\n{{- end }}\n\n{{ range $object := .Objects -}}\n\t{{ range $field := $object.Fields -}}\n\t\t{{ if $field.Args }}\n\t\t\tfunc {{ $field.ArgsFunc }}(rawArgs map[string]interface{}) (map[string]interface{}, error) {\n\t\t\t{{ template \"args.gotpl\" $field.Args }}\n\t\t\t}\n\t\t{{ end }}\n\t{{ end }}\n{{- end }}\n\n{{ range $directive := .Directives }}\n\t{{ if $directive.Args }}\n\t\tfunc {{ $directive.ArgsFunc }}(rawArgs map[string]interface{}) (map[string]interface{}, error) {\n\t\t{{ template \"args.gotpl\" $directive.Args }}\n\t\t}\n\t{{ end }}\n{{ end }}\n\ntype executableSchema struct {\n\tresolvers  ResolverRoot\n\tdirectives DirectiveRoot\n\tcomplexity ComplexityRoot\n}\n\nfunc (e *executableSchema) Schema() *ast.Schema {\n\treturn parsedSchema\n}\n\nfunc (e *executableSchema) Complexity(typeName, field string, childComplexity int, rawArgs map[string]interface{}) (int, bool) {\n\tswitch typeName + \".\" + field {\n\t{{ range $object := .Objects }}\n\t\t{{ if not $object.IsReserved }}\n\t\t\t{{ range $field := $object.Fields }}\n\t\t\t\t{{ if not $field.IsReserved }}\n\t\t\t\t\tcase \"{{$object.GQLType}}.{{$field.GQLName}}\":\n\t\t\t\t\t\tif e.complexity.{{$object.GQLType|toCamel}}.{{$field.GQLName|toCamel}} == nil {\n\t\t\t\t\t\t\tbreak\n\t\t\t\t\t\t}\n\t\t\t\t\t\t{{ if $field.Args }}\n\t\t\t\t\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\t\t\t\t\tif err != nil {\n\t\t\t\t\t\t\t\treturn 0, false\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t{{ end }}\n\t\t\t\t\t\treturn e.complexity.{{$object.GQLType|toCamel}}.{{$field.GQLName|toCamel}}(childComplexity{{if $field.Args}}, {{$field.ComplexityArgs}} {{end}}), true\n\t\t\t\t{{ end }}\n\t\t\t{{ end }}\n\t\t{{ end }}\n\t{{ end }}\n\t}\n\treturn 0, false\n}\n\nfunc (e *executableSchema) Query(ctx context.Context, op *ast.OperationDefinition) *graphql.Response {\n\t{{- if .QueryRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\tdata := ec._{{.QueryRoot.GQLType}}(ctx, op.SelectionSet)\n\t\t\tvar buf bytes.Buffer\n\t\t\tdata.MarshalGQL(&buf)\n\t\t\treturn buf.Bytes()\n\t\t})\n\n\t\treturn &graphql.Response{\n\t\t\tData:   buf,\n\t\t\tErrors: ec.Errors,\n\t\t}\n\t{{- else }}\n\t\treturn graphql.ErrorResponse(ctx, \"queries are not supported\")\n\t{{- end }}\n}\n\nfunc (e *executableSchema) Mutation(ctx context.Context, op *ast.OperationDefinition) *graphql.Response {\n\t{{- if .MutationRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\tdata := ec._{{.MutationRoot.GQLType}}(ctx, op.SelectionSet)\n\t\t\tvar buf bytes.Buffer\n\t\t\tdata.MarshalGQL(&buf)\n\t\t\treturn buf.Bytes()\n\t\t})\n\n\t\treturn &graphql.Response{\n\t\t\tData:   buf,\n\t\t\tErrors: ec.Errors,\n\t\t}\n\t{{- else }}\n\t\treturn graphql.ErrorResponse(ctx, \"mutations are not supported\")\n\t{{- end }}\n}\n\nfunc (e *executableSchema) Subscription(ctx context.Context, op *ast.OperationDefinition) func() *graphql.Response {\n\t{{- if .SubscriptionRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tnext := ec._{{.SubscriptionRoot.GQLType}}(ctx, op.SelectionSet)\n\t\tif ec.Errors != nil {\n\t\t\treturn graphql.OneShot(&graphql.Response{Data: []byte(\"null\"), Errors: ec.Errors})\n\t\t}\n\n\t\tvar buf bytes.Buffer\n\t\treturn func() *graphql.Response {\n\t\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\t\tbuf.Reset()\n\t\t\t\tdata := next()\n\n\t\t\t\tif data == nil {\n\t\t\t\t\treturn nil\n\t\t\t\t}\n\t\t\t\tdata.MarshalGQL(&buf)\n\t\t\t\treturn buf.Bytes()\n\t\t\t})\n\n\t\t\tif buf == nil {\n\t\t\t\treturn nil\n\t\t\t}\n\n\t\t\treturn &graphql.Response{\n\t\t\t\tData:   buf,\n\t\t\t\tErrors: ec.Errors,\n\t\t\t}\n\t\t}\n\t{{- else }}\n\t\treturn graphql.OneShot(graphql.ErrorResponse(ctx, \"subscriptions are not supported\"))\n\t{{- end }}\n}\n\ntype executionContext struct {\n\t*graphql.RequestContext\n\t*executableSchema\n}\n\n{{- range $object := .Objects }}\n\t{{ template \"object.gotpl\" $object }}\n\n\t{{- range $field := $object.Fields }}\n\t\t{{ template \"field.gotpl\" $field }}\n\t{{ end }}\n{{- end}}\n\n{{- range $interface := .Interfaces }}\n\t{{ template \"interface.gotpl\" $interface }}\n{{- end }}\n\n{{- range $input := .Inputs }}\n\t{{ template \"input.gotpl\" $input }}\n{{- end }}\n\nfunc (ec *executionContext) FieldMiddleware(ctx context.Context, obj interface{}, next graphql.Resolver) (ret interface{}) {\n\tdefer func() {\n\t\tif r := recover(); r != nil {\n\t\t\tec.Error(ctx, ec.Recover(ctx, r))\n\t\t\tret = nil\n\t\t}\n\t}()\n\t{{- if .Directives }}\n\trctx := graphql.GetResolverContext(ctx)\n\tfor _, d := range rctx.Field.Definition.Directives {\n\t\tswitch d.Name {\n\t\t{{- range $directive := .Directives }}\n\t\tcase \"{{$directive.Name}}\":\n\t\t\tif ec.directives.{{$directive.Name|ucFirst}} != nil {\n\t\t\t\t{{- if $directive.Args }}\n\t\t\t\t\trawArgs := d.ArgumentMap(ec.Variables)\n\t\t\t\t\targs, err := {{ $directive.ArgsFunc }}(rawArgs)\n\t\t\t\t\tif err != nil {\n\t\t\t\t\t\tec.Error(ctx, err)\n\t\t\t\t\t\treturn nil\n\t\t\t\t\t}\n\t\t\t\t{{- end }}\n\t\t\t\tn := next\n\t\t\t\tnext = func(ctx context.Context) (interface{}, error) {\n\t\t\t\t\treturn ec.directives.{{$directive.Name|ucFirst}}({{$directive.CallArgs}})\n\t\t\t\t}\n\t\t\t}\n\t\t{{- end }}\n\t\t}\n\t}\n\t{{- end }}\n\tres, err := ec.ResolverMiddleware(ctx, next)\n\tif err != nil {\n\t\tec.Error(ctx, err)\n\t\treturn nil\n\t}\n\treturn res\n}\n\nfunc (ec *executionContext) introspectSchema() *introspection.Schema {\n\treturn introspection.WrapSchema(parsedSchema)\n}\n\nfunc (ec *executionContext) introspectType(name string) *introspection.Type {\n\treturn introspection.WrapTypeFromDef(parsedSchema, parsedSchema.Types[name])\n}\n\nvar parsedSchema = gqlparser.MustLoadSchema(\n\t&ast.Source{Name: {{.SchemaFilename|quote}}, Input: {{.SchemaRaw|rawQuote}}},\n)\n",
+	"field.gotpl":     "{{ $field := . }}\n{{ $object := $field.Object }}\n\n{{- if $object.Stream }}\n\tfunc (ec *executionContext) _{{$object.GQLType}}_{{$field.GQLName}}(ctx context.Context, field graphql.CollectedField) func() graphql.Marshaler {\n\t\t{{- if $field.Args }}\n\t\t\trawArgs := field.ArgumentMap(ec.Variables)\n\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\tif err != nil {\n\t\t\t\tec.Error(ctx, err)\n\t\t\t\treturn nil\n\t\t\t}\n\t\t{{- end }}\n\t\tctx = graphql.WithResolverContext(ctx, &graphql.ResolverContext{\n\t\t\tField: field,\n\t\t})\n\t\t// FIXME: subscriptions are missing request middleware stack https://github.com/99designs/gqlgen/issues/259\n\t\t//          and Tracer stack\n\t\trctx := ctx\n\t\tresults, err := ec.resolvers.{{ $field.ShortInvocation }}\n\t\tif err != nil {\n\t\t\tec.Error(ctx, err)\n\t\t\treturn nil\n\t\t}\n\t\treturn func() graphql.Marshaler {\n\t\t\tres, ok := <-results\n\t\t\tif !ok {\n\t\t\t\treturn nil\n\t\t\t}\n\t\t\tvar out graphql.OrderedMap\n\t\t\tout.Add(field.Alias, func() graphql.Marshaler { {{ $field.WriteJson }} }())\n\t\t\treturn &out\n\t\t}\n\t}\n{{ else }}\n\t// nolint: vetshadow\n\tfunc (ec *executionContext) _{{$object.GQLType}}_{{$field.GQLName}}(ctx context.Context, field graphql.CollectedField, {{if not $object.Root}}obj *{{$object.FullName}}{{end}}) graphql.Marshaler {\n\t\tctx = ec.Tracer.StartFieldExecution(ctx, field)\n\t\tdefer func () { ec.Tracer.EndFieldExecution(ctx) }()\n\t\t{{- if $field.Args }}\n\t\t\trawArgs := field.ArgumentMap(ec.Variables)\n\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\tif err != nil {\n\t\t\t\tec.Error(ctx, err)\n\t\t\t\treturn graphql.Null\n\t\t\t}\n\t\t{{- end }}\n\t\trctx := &graphql.ResolverContext{\n\t\t\tObject: {{$object.GQLType|quote}},\n\t\t\tArgs: {{if $field.Args }}args{{else}}nil{{end}},\n\t\t\tField: field,\n\t\t}\n\t\tctx = graphql.WithResolverContext(ctx, rctx)\n\t\tctx = ec.Tracer.StartFieldResolverExecution(ctx, rctx)\n\t\tresTmp := ec.FieldMiddleware(ctx, {{if $object.Root}}nil{{else}}obj{{end}}, func(rctx context.Context) (interface{}, error) {\n\t\t\tctx = rctx  // use context from middleware stack in children\n\t\t\t{{- if $field.IsResolver }}\n\t\t\t\treturn ec.resolvers.{{ $field.ShortInvocation }}\n\t\t\t{{- else if $field.IsMethod }}\n\t\t\t\t{{- if $field.NoErr }}\n\t\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}({{ $field.CallArgs }}), nil\n\t\t\t\t{{- else }}\n\t\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}({{ $field.CallArgs }})\n\t\t\t\t{{- end }}\n\t\t\t{{- else if $field.IsVariable }}\n\t\t\t\treturn {{$field.GoReceiverName}}.{{$field.GoFieldName}}, nil\n\t\t\t{{- end }}\n\t\t})\n\t\tif resTmp == nil {\n\t\t\t{{- if $field.ASTType.NonNull }}\n\t\t\t\tif !ec.HasError(rctx) {\n\t\t\t\t\tec.Errorf(ctx, \"must not be null\")\n\t\t\t\t}\n\t\t\t{{- end }}\n\t\t\treturn graphql.Null\n\t\t}\n\t\tres := resTmp.({{$field.Signature}})\n\t\trctx.Result = res\n\t\tctx = ec.Tracer.StartFieldChildExecution(ctx)\n\t\t{{ $field.WriteJson }}\n\t}\n{{ end }}\n",
+	"generated.gotpl": "// Code generated by github.com/99designs/gqlgen, DO NOT EDIT.\n\npackage {{ .PackageName }}\n\nimport (\n\t%%%IMPORTS%%%\n\n\t{{ reserveImport \"context\"  }}\n\t{{ reserveImport \"fmt\"  }}\n\t{{ reserveImport \"io\"  }}\n\t{{ reserveImport \"strconv\"  }}\n\t{{ reserveImport \"time\"  }}\n\t{{ reserveImport \"sync\"  }}\n\t{{ reserveImport \"errors\"  }}\n\t{{ reserveImport \"bytes\"  }}\n\n\t{{ reserveImport \"github.com/vektah/gqlparser\" }}\n\t{{ reserveImport \"github.com/vektah/gqlparser/ast\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql/introspection\" }}\n)\n\n// NewExecutableSchema creates an ExecutableSchema from the ResolverRoot interface.\nfunc NewExecutableSchema(cfg Config) graphql.ExecutableSchema {\n\treturn &executableSchema{\n\t\tresolvers: cfg.Resolvers,\n\t\tdirectives: cfg.Directives,\n\t\tcomplexity: cfg.Complexity,\n\t}\n}\n\ntype Config struct {\n\tResolvers  ResolverRoot\n\tDirectives DirectiveRoot\n\tComplexity ComplexityRoot\n}\n\ntype ResolverRoot interface {\n{{- range $object := .Objects -}}\n\t{{ if $object.HasResolvers -}}\n\t\t{{$object.GQLType}}() {{$object.GQLType}}Resolver\n\t{{ end }}\n{{- end }}\n}\n\ntype DirectiveRoot struct {\n{{ range $directive := .Directives }}\n\t{{ $directive.Declaration }}\n{{ end }}\n}\n\ntype ComplexityRoot struct {\n{{ range $object := .Objects }}\n\t{{ if not $object.IsReserved -}}\n\t\t{{ $object.GQLType|toCamel }} struct {\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{ if not $field.IsReserved -}}\n\t\t\t\t{{ $field.GQLName|toCamel }} {{ $field.ComplexitySignature }}\n\t\t\t{{ end }}\n\t\t{{- end }}\n\t\t}\n\t{{- end }}\n{{ end }}\n}\n\n{{ range $object := .Objects -}}\n\t{{ if $object.HasResolvers }}\n\t\ttype {{$object.GQLType}}Resolver interface {\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{ $field.ShortResolverDeclaration }}\n\t\t{{ end }}\n\t\t}\n\t{{- end }}\n{{- end }}\n\n{{ range $object := .Objects -}}\n\t{{ range $field := $object.Fields -}}\n\t\t{{ if $field.Args }}\n\t\t\tfunc {{ $field.ArgsFunc }}(rawArgs map[string]interface{}) (map[string]interface{}, error) {\n\t\t\t{{ template \"args.gotpl\" $field.Args }}\n\t\t\t}\n\t\t{{ end }}\n\t{{ end }}\n{{- end }}\n\n{{ range $directive := .Directives }}\n\t{{ if $directive.Args }}\n\t\tfunc {{ $directive.ArgsFunc }}(rawArgs map[string]interface{}) (map[string]interface{}, error) {\n\t\t{{ template \"args.gotpl\" $directive.Args }}\n\t\t}\n\t{{ end }}\n{{ end }}\n\ntype executableSchema struct {\n\tresolvers  ResolverRoot\n\tdirectives DirectiveRoot\n\tcomplexity ComplexityRoot\n}\n\nfunc (e *executableSchema) Schema() *ast.Schema {\n\treturn parsedSchema\n}\n\nfunc (e *executableSchema) Complexity(typeName, field string, childComplexity int, rawArgs map[string]interface{}) (int, bool) {\n\tswitch typeName + \".\" + field {\n\t{{ range $object := .Objects }}\n\t\t{{ if not $object.IsReserved }}\n\t\t\t{{ range $field := $object.Fields }}\n\t\t\t\t{{ if not $field.IsReserved }}\n\t\t\t\t\tcase \"{{$object.GQLType}}.{{$field.GQLName}}\":\n\t\t\t\t\t\tif e.complexity.{{$object.GQLType|toCamel}}.{{$field.GQLName|toCamel}} == nil {\n\t\t\t\t\t\t\tbreak\n\t\t\t\t\t\t}\n\t\t\t\t\t\t{{ if $field.Args }}\n\t\t\t\t\t\t\targs, err := {{ $field.ArgsFunc }}(rawArgs)\n\t\t\t\t\t\t\tif err != nil {\n\t\t\t\t\t\t\t\treturn 0, false\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t{{ end }}\n\t\t\t\t\t\treturn e.complexity.{{$object.GQLType|toCamel}}.{{$field.GQLName|toCamel}}(childComplexity{{if $field.Args}}, {{$field.ComplexityArgs}} {{end}}), true\n\t\t\t\t{{ end }}\n\t\t\t{{ end }}\n\t\t{{ end }}\n\t{{ end }}\n\t}\n\treturn 0, false\n}\n\nfunc (e *executableSchema) Query(ctx context.Context, op *ast.OperationDefinition) *graphql.Response {\n\t{{- if .QueryRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\tdata := ec._{{.QueryRoot.GQLType}}(ctx, op.SelectionSet)\n\t\t\tvar buf bytes.Buffer\n\t\t\tdata.MarshalGQL(&buf)\n\t\t\treturn buf.Bytes()\n\t\t})\n\n\t\treturn &graphql.Response{\n\t\t\tData:       buf,\n\t\t\tErrors:     ec.Errors,\n\t\t\tExtensions: ec.Extensions,\t\t}\n\t{{- else }}\n\t\treturn graphql.ErrorResponse(ctx, \"queries are not supported\")\n\t{{- end }}\n}\n\nfunc (e *executableSchema) Mutation(ctx context.Context, op *ast.OperationDefinition) *graphql.Response {\n\t{{- if .MutationRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\tdata := ec._{{.MutationRoot.GQLType}}(ctx, op.SelectionSet)\n\t\t\tvar buf bytes.Buffer\n\t\t\tdata.MarshalGQL(&buf)\n\t\t\treturn buf.Bytes()\n\t\t})\n\n\t\treturn &graphql.Response{\n\t\t\tData:       buf,\n\t\t\tErrors:     ec.Errors,\n\t\t\tExtensions: ec.Extensions,\n\t\t}\n\t{{- else }}\n\t\treturn graphql.ErrorResponse(ctx, \"mutations are not supported\")\n\t{{- end }}\n}\n\nfunc (e *executableSchema) Subscription(ctx context.Context, op *ast.OperationDefinition) func() *graphql.Response {\n\t{{- if .SubscriptionRoot }}\n\t\tec := executionContext{graphql.GetRequestContext(ctx), e}\n\n\t\tnext := ec._{{.SubscriptionRoot.GQLType}}(ctx, op.SelectionSet)\n\t\tif ec.Errors != nil {\n\t\t\treturn graphql.OneShot(&graphql.Response{Data: []byte(\"null\"), Errors: ec.Errors})\n\t\t}\n\n\t\tvar buf bytes.Buffer\n\t\treturn func() *graphql.Response {\n\t\t\tbuf := ec.RequestMiddleware(ctx, func(ctx context.Context) []byte {\n\t\t\t\tbuf.Reset()\n\t\t\t\tdata := next()\n\n\t\t\t\tif data == nil {\n\t\t\t\t\treturn nil\n\t\t\t\t}\n\t\t\t\tdata.MarshalGQL(&buf)\n\t\t\t\treturn buf.Bytes()\n\t\t\t})\n\n\t\t\tif buf == nil {\n\t\t\t\treturn nil\n\t\t\t}\n\n\t\t\treturn &graphql.Response{\n\t\t\t\tData:       buf,\n\t\t\t\tErrors:     ec.Errors,\n\t\t\t\tExtensions: ec.Extensions,\n\t\t\t}\n\t\t}\n\t{{- else }}\n\t\treturn graphql.OneShot(graphql.ErrorResponse(ctx, \"subscriptions are not supported\"))\n\t{{- end }}\n}\n\ntype executionContext struct {\n\t*graphql.RequestContext\n\t*executableSchema\n}\n\n{{- range $object := .Objects }}\n\t{{ template \"object.gotpl\" $object }}\n\n\t{{- range $field := $object.Fields }}\n\t\t{{ template \"field.gotpl\" $field }}\n\t{{ end }}\n{{- end}}\n\n{{- range $interface := .Interfaces }}\n\t{{ template \"interface.gotpl\" $interface }}\n{{- end }}\n\n{{- range $input := .Inputs }}\n\t{{ template \"input.gotpl\" $input }}\n{{- end }}\n\nfunc (ec *executionContext) FieldMiddleware(ctx context.Context, obj interface{}, next graphql.Resolver) (ret interface{}) {\n\tdefer func() {\n\t\tif r := recover(); r != nil {\n\t\t\tec.Error(ctx, ec.Recover(ctx, r))\n\t\t\tret = nil\n\t\t}\n\t}()\n\t{{- if .Directives }}\n\trctx := graphql.GetResolverContext(ctx)\n\tfor _, d := range rctx.Field.Definition.Directives {\n\t\tswitch d.Name {\n\t\t{{- range $directive := .Directives }}\n\t\tcase \"{{$directive.Name}}\":\n\t\t\tif ec.directives.{{$directive.Name|ucFirst}} != nil {\n\t\t\t\t{{- if $directive.Args }}\n\t\t\t\t\trawArgs := d.ArgumentMap(ec.Variables)\n\t\t\t\t\targs, err := {{ $directive.ArgsFunc }}(rawArgs)\n\t\t\t\t\tif err != nil {\n\t\t\t\t\t\tec.Error(ctx, err)\n\t\t\t\t\t\treturn nil\n\t\t\t\t\t}\n\t\t\t\t{{- end }}\n\t\t\t\tn := next\n\t\t\t\tnext = func(ctx context.Context) (interface{}, error) {\n\t\t\t\t\treturn ec.directives.{{$directive.Name|ucFirst}}({{$directive.CallArgs}})\n\t\t\t\t}\n\t\t\t}\n\t\t{{- end }}\n\t\t}\n\t}\n\t{{- end }}\n\tres, err := ec.ResolverMiddleware(ctx, next)\n\tif err != nil {\n\t\tec.Error(ctx, err)\n\t\treturn nil\n\t}\n\treturn res\n}\n\nfunc (ec *executionContext) introspectSchema() (*introspection.Schema, error) {\n\tif ec.DisableIntrospection {\n\t\treturn nil, errors.New(\"introspection disabled\")\n\t}\n\treturn introspection.WrapSchema(parsedSchema), nil\n}\n\nfunc (ec *executionContext) introspectType(name string) (*introspection.Type, error) {\n\tif ec.DisableIntrospection {\n\t\treturn nil, errors.New(\"introspection disabled\")\n\t}\n\treturn introspection.WrapTypeFromDef(parsedSchema, parsedSchema.Types[name]), nil\n}\n\nvar parsedSchema = gqlparser.MustLoadSchema(\n\t{{- range $filename, $schema := .SchemaRaw }}\n\t\t&ast.Source{Name: {{$filename|quote}}, Input: {{$schema|rawQuote}}},\n\t{{- end }}\n)\n",
 	"input.gotpl":     "\t{{- if .IsMarshaled }}\n\tfunc Unmarshal{{ .GQLType }}(v interface{}) ({{.FullName}}, error) {\n\t\tvar it {{.FullName}}\n\t\tvar asMap = v.(map[string]interface{})\n\t\t{{ range $field := .Fields}}\n\t\t\t{{- if $field.Default}}\n\t\t\t\tif _, present := asMap[{{$field.GQLName|quote}}] ; !present {\n\t\t\t\t\tasMap[{{$field.GQLName|quote}}] = {{ $field.Default | dump }}\n\t\t\t\t}\n\t\t\t{{- end}}\n\t\t{{- end }}\n\n\t\tfor k, v := range asMap {\n\t\t\tswitch k {\n\t\t\t{{- range $field := .Fields }}\n\t\t\tcase {{$field.GQLName|quote}}:\n\t\t\t\tvar err error\n\t\t\t\t{{ $field.Unmarshal (print \"it.\" $field.GoFieldName) \"v\" }}\n\t\t\t\tif err != nil {\n\t\t\t\t\treturn it, err\n\t\t\t\t}\n\t\t\t{{- end }}\n\t\t\t}\n\t\t}\n\n\t\treturn it, nil\n\t}\n\t{{- end }}\n",
 	"interface.gotpl": "{{- $interface := . }}\n\nfunc (ec *executionContext) _{{$interface.GQLType}}(ctx context.Context, sel ast.SelectionSet, obj *{{$interface.FullName}}) graphql.Marshaler {\n\tswitch obj := (*obj).(type) {\n\tcase nil:\n\t\treturn graphql.Null\n\t{{- range $implementor := $interface.Implementors }}\n\t\t{{- if $implementor.ValueReceiver }}\n\t\t\tcase {{$implementor.FullName}}:\n\t\t\t\treturn ec._{{$implementor.GQLType}}(ctx, sel, &obj)\n\t\t{{- end}}\n\t\tcase *{{$implementor.FullName}}:\n\t\t\treturn ec._{{$implementor.GQLType}}(ctx, sel, obj)\n\t{{- end }}\n\tdefault:\n\t\tpanic(fmt.Errorf(\"unexpected type %T\", obj))\n\t}\n}\n",
-	"models.gotpl":    "// Code generated by github.com/99designs/gqlgen, DO NOT EDIT.\n\npackage {{ .PackageName }}\n\nimport (\n{{- range $import := .Imports }}\n\t{{- $import.Write }}\n{{ end }}\n)\n\n{{ range $model := .Models }}\n\t{{with .Description}} {{.|prefixLines \"// \"}} {{end}}\n\t{{- if .IsInterface }}\n\t\ttype {{.GoType}} interface {}\n\t{{- else }}\n\t\ttype {{.GoType}} struct {\n\t\t\t{{- range $field := .Fields }}\n\t\t\t\t{{- with .Description}}\n\t\t\t\t\t{{.|prefixLines \"// \"}}\n\t\t\t\t{{- end}}\n\t\t\t\t{{- if $field.GoFieldName }}\n\t\t\t\t\t{{ $field.GoFieldName }} {{$field.Signature}} `json:\"{{$field.GQLName}}\"`\n\t\t\t\t{{- else }}\n\t\t\t\t\t{{ $field.GoFKName }} {{$field.GoFKType}}\n\t\t\t\t{{- end }}\n\t\t\t{{- end }}\n\t\t}\n\t{{- end }}\n{{- end}}\n\n{{ range $enum := .Enums }}\n\t{{with .Description}}{{.|prefixLines \"// \"}} {{end}}\n\ttype {{.GoType}} string\n\tconst (\n\t{{- range $value := .Values}}\n\t\t{{- with .Description}}\n\t\t\t{{.|prefixLines \"// \"}}\n\t\t{{- end}}\n\t\t{{$enum.GoType}}{{ .Name|toCamel }} {{$enum.GoType}} = {{.Name|quote}}\n\t{{- end }}\n\t)\n\n\tfunc (e {{.GoType}}) IsValid() bool {\n\t\tswitch e {\n\t\tcase {{ range $index, $element := .Values}}{{if $index}},{{end}}{{ $enum.GoType }}{{ $element.Name|toCamel }}{{end}}:\n\t\t\treturn true\n\t\t}\n\t\treturn false\n\t}\n\n\tfunc (e {{.GoType}}) String() string {\n\t\treturn string(e)\n\t}\n\n\tfunc (e *{{.GoType}}) UnmarshalGQL(v interface{}) error {\n\t\tstr, ok := v.(string)\n\t\tif !ok {\n\t\t\treturn fmt.Errorf(\"enums must be strings\")\n\t\t}\n\n\t\t*e = {{.GoType}}(str)\n\t\tif !e.IsValid() {\n\t\t\treturn fmt.Errorf(\"%s is not a valid {{.GQLType}}\", str)\n\t\t}\n\t\treturn nil\n\t}\n\n\tfunc (e {{.GoType}}) MarshalGQL(w io.Writer) {\n\t\tfmt.Fprint(w, strconv.Quote(e.String()))\n\t}\n\n{{- end }}\n",
+	"models.gotpl":    "// Code generated by github.com/99designs/gqlgen, DO NOT EDIT.\n\npackage {{ .PackageName }}\n\nimport (\n\t%%%IMPORTS%%%\n\n\t{{ reserveImport \"context\"  }}\n\t{{ reserveImport \"fmt\"  }}\n\t{{ reserveImport \"io\"  }}\n\t{{ reserveImport \"strconv\"  }}\n\t{{ reserveImport \"time\"  }}\n\t{{ reserveImport \"sync\"  }}\n\t{{ reserveImport \"errors\"  }}\n\t{{ reserveImport \"bytes\"  }}\n\n\t{{ reserveImport \"github.com/vektah/gqlparser\" }}\n\t{{ reserveImport \"github.com/vektah/gqlparser/ast\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql/introspection\" }}\n)\n\n{{ range $model := .Models }}\n\t{{with .Description}} {{.|prefixLines \"// \"}} {{end}}\n\t{{- if .IsInterface }}\n\t\ttype {{.GoType}} interface {\n\t\t\tIs{{.GoType}}()\n\t\t}\n\t{{- else }}\n\t\ttype {{.GoType}} struct {\n\t\t\t{{- range $field := .Fields }}\n\t\t\t\t{{- with .Description}}\n\t\t\t\t\t{{.|prefixLines \"// \"}}\n\t\t\t\t{{- end}}\n\t\t\t\t{{- if $field.GoFieldName }}\n\t\t\t\t\t{{ $field.GoFieldName }} {{$field.Signature}} `json:\"{{$field.GQLName}}\"`\n\t\t\t\t{{- else }}\n\t\t\t\t\t{{ $field.GoFKName }} {{$field.GoFKType}}\n\t\t\t\t{{- end }}\n\t\t\t{{- end }}\n\t\t}\n\n\t\t{{- range $iface := .Implements }}\n\t\t\tfunc ({{$model.GoType}}) Is{{$iface.GoType}}() {}\n\t\t{{- end }}\n\n\t{{- end }}\n{{- end}}\n\n{{ range $enum := .Enums }}\n\t{{with .Description}}{{.|prefixLines \"// \"}} {{end}}\n\ttype {{.GoType}} string\n\tconst (\n\t{{- range $value := .Values}}\n\t\t{{- with .Description}}\n\t\t\t{{.|prefixLines \"// \"}}\n\t\t{{- end}}\n\t\t{{$enum.GoType}}{{ .Name|toCamel }} {{$enum.GoType}} = {{.Name|quote}}\n\t{{- end }}\n\t)\n\n\tfunc (e {{.GoType}}) IsValid() bool {\n\t\tswitch e {\n\t\tcase {{ range $index, $element := .Values}}{{if $index}},{{end}}{{ $enum.GoType }}{{ $element.Name|toCamel }}{{end}}:\n\t\t\treturn true\n\t\t}\n\t\treturn false\n\t}\n\n\tfunc (e {{.GoType}}) String() string {\n\t\treturn string(e)\n\t}\n\n\tfunc (e *{{.GoType}}) UnmarshalGQL(v interface{}) error {\n\t\tstr, ok := v.(string)\n\t\tif !ok {\n\t\t\treturn fmt.Errorf(\"enums must be strings\")\n\t\t}\n\n\t\t*e = {{.GoType}}(str)\n\t\tif !e.IsValid() {\n\t\t\treturn fmt.Errorf(\"%s is not a valid {{.GQLType}}\", str)\n\t\t}\n\t\treturn nil\n\t}\n\n\tfunc (e {{.GoType}}) MarshalGQL(w io.Writer) {\n\t\tfmt.Fprint(w, strconv.Quote(e.String()))\n\t}\n\n{{- end }}\n",
 	"object.gotpl":    "{{ $object := . }}\n\nvar {{ $object.GQLType|lcFirst}}Implementors = {{$object.Implementors}}\n\n// nolint: gocyclo, errcheck, gas, goconst\n{{- if .Stream }}\nfunc (ec *executionContext) _{{$object.GQLType}}(ctx context.Context, sel ast.SelectionSet) func() graphql.Marshaler {\n\tfields := graphql.CollectFields(ctx, sel, {{$object.GQLType|lcFirst}}Implementors)\n\tctx = graphql.WithResolverContext(ctx, &graphql.ResolverContext{\n\t\tObject: {{$object.GQLType|quote}},\n\t})\n\tif len(fields) != 1 {\n\t\tec.Errorf(ctx, \"must subscribe to exactly one stream\")\n\t\treturn nil\n\t}\n\n\tswitch fields[0].Name {\n\t{{- range $field := $object.Fields }}\n\tcase \"{{$field.GQLName}}\":\n\t\treturn ec._{{$object.GQLType}}_{{$field.GQLName}}(ctx, fields[0])\n\t{{- end }}\n\tdefault:\n\t\tpanic(\"unknown field \" + strconv.Quote(fields[0].Name))\n\t}\n}\n{{- else }}\nfunc (ec *executionContext) _{{$object.GQLType}}(ctx context.Context, sel ast.SelectionSet{{if not $object.Root}}, obj *{{$object.FullName}} {{end}}) graphql.Marshaler {\n\tfields := graphql.CollectFields(ctx, sel, {{$object.GQLType|lcFirst}}Implementors)\n\t{{if $object.Root}}\n\t\tctx = graphql.WithResolverContext(ctx, &graphql.ResolverContext{\n\t\t\tObject: {{$object.GQLType|quote}},\n\t\t})\n\t{{end}}\n\n\t{{if $object.IsConcurrent}} var wg sync.WaitGroup {{end}}\n\tout := graphql.NewOrderedMap(len(fields))\n\tinvalid := false\n\tfor i, field := range fields {\n\t\tout.Keys[i] = field.Alias\n\n\t\tswitch field.Name {\n\t\tcase \"__typename\":\n\t\t\tout.Values[i] = graphql.MarshalString({{$object.GQLType|quote}})\n\t\t{{- range $field := $object.Fields }}\n\t\tcase \"{{$field.GQLName}}\":\n\t\t\t{{- if $field.IsConcurrent }}\n\t\t\t\twg.Add(1)\n\t\t\t\tgo func(i int, field graphql.CollectedField) {\n\t\t\t{{- end }}\n\t\t\t\tout.Values[i] = ec._{{$object.GQLType}}_{{$field.GQLName}}(ctx, field{{if not $object.Root}}, obj{{end}})\n\t\t\t\t{{- if $field.ASTType.NonNull }}\n\t\t\t\t\tif out.Values[i] == graphql.Null {\n\t\t\t\t\t\tinvalid = true\n\t\t\t\t\t}\n\t\t\t\t{{- end }}\n\t\t\t{{- if $field.IsConcurrent }}\n\t\t\t\t\twg.Done()\n\t\t\t\t}(i, field)\n\t\t\t{{- end }}\n\t\t{{- end }}\n\t\tdefault:\n\t\t\tpanic(\"unknown field \" + strconv.Quote(field.Name))\n\t\t}\n\t}\n\t{{if $object.IsConcurrent}} wg.Wait() {{end}}\n\tif invalid { return graphql.Null }\n\treturn out\n}\n{{- end }}\n",
-	"resolver.gotpl":  "//go:generate gorunpkg github.com/99designs/gqlgen\n\npackage {{ .PackageName }}\n\nimport (\n{{- range $import := .Imports }}\n\t{{- $import.Write }}\n{{ end }}\n)\n\ntype {{.ResolverType}} struct {}\n\n{{ range $object := .Objects -}}\n\t{{- if $object.HasResolvers -}}\n\t\tfunc (r *{{$.ResolverType}}) {{$object.GQLType}}() {{ $object.ResolverInterface.FullName }} {\n\t\t\treturn &{{lcFirst $object.GQLType}}Resolver{r}\n\t\t}\n\t{{ end -}}\n{{ end }}\n\n{{ range $object := .Objects -}}\n\t{{- if $object.HasResolvers -}}\n\t\ttype {{lcFirst $object.GQLType}}Resolver struct { *Resolver }\n\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{- if $field.IsResolver -}}\n\t\t\tfunc (r *{{lcFirst $object.GQLType}}Resolver) {{ $field.ShortResolverDeclaration }} {\n\t\t\t\tpanic(\"not implemented\")\n\t\t\t}\n\t\t\t{{ end -}}\n\t\t{{ end -}}\n\t{{ end -}}\n{{ end }}\n",
-	"server.gotpl":    "package main\n\nimport (\n{{- range $import := .Imports }}\n\t{{- $import.Write }}\n{{ end }}\n)\n\nconst defaultPort = \"8080\"\n\nfunc main() {\n\tport := os.Getenv(\"PORT\")\n\tif port == \"\" {\n\t\tport = defaultPort\n\t}\n\n\thttp.Handle(\"/\", handler.Playground(\"GraphQL playground\", \"/query\"))\n\thttp.Handle(\"/query\", handler.GraphQL({{.ExecPackageName}}.NewExecutableSchema({{.ExecPackageName}}.Config{Resolvers: &{{.ResolverPackageName}}.Resolver{}})))\n\n\tlog.Printf(\"connect to http://localhost:%s/ for GraphQL playground\", port)\n\tlog.Fatal(http.ListenAndServe(\":\" + port, nil))\n}\n",
+	"resolver.gotpl":  "package {{ .PackageName }}\n\nimport (\n\t%%%IMPORTS%%%\n\n\t{{ reserveImport \"context\"  }}\n\t{{ reserveImport \"fmt\"  }}\n\t{{ reserveImport \"io\"  }}\n\t{{ reserveImport \"strconv\"  }}\n\t{{ reserveImport \"time\"  }}\n\t{{ reserveImport \"sync\"  }}\n\t{{ reserveImport \"errors\"  }}\n\t{{ reserveImport \"bytes\"  }}\n\n\t{{ reserveImport \"github.com/99designs/gqlgen/handler\" }}\n\t{{ reserveImport \"github.com/vektah/gqlparser\" }}\n\t{{ reserveImport \"github.com/vektah/gqlparser/ast\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/graphql/introspection\" }}\n)\n\ntype {{.ResolverType}} struct {}\n\n{{ range $object := .Objects -}}\n\t{{- if $object.HasResolvers -}}\n\t\tfunc (r *{{$.ResolverType}}) {{$object.GQLType}}() {{ $object.ResolverInterface.FullName }} {\n\t\t\treturn &{{lcFirst $object.GQLType}}Resolver{r}\n\t\t}\n\t{{ end -}}\n{{ end }}\n\n{{ range $object := .Objects -}}\n\t{{- if $object.HasResolvers -}}\n\t\ttype {{lcFirst $object.GQLType}}Resolver struct { *Resolver }\n\n\t\t{{ range $field := $object.Fields -}}\n\t\t\t{{- if $field.IsResolver -}}\n\t\t\tfunc (r *{{lcFirst $object.GQLType}}Resolver) {{ $field.ShortResolverDeclaration }} {\n\t\t\t\tpanic(\"not implemented\")\n\t\t\t}\n\t\t\t{{ end -}}\n\t\t{{ end -}}\n\t{{ end -}}\n{{ end }}\n",
+	"server.gotpl":    "package main\n\nimport (\n\t%%%IMPORTS%%%\n\n\t{{ reserveImport \"context\" }}\n\t{{ reserveImport \"log\" }}\n\t{{ reserveImport \"net/http\" }}\n\t{{ reserveImport \"os\" }}\n\t{{ reserveImport \"github.com/99designs/gqlgen/handler\" }}\n)\n\nconst defaultPort = \"8080\"\n\nfunc main() {\n\tport := os.Getenv(\"PORT\")\n\tif port == \"\" {\n\t\tport = defaultPort\n\t}\n\n\thttp.Handle(\"/\", handler.Playground(\"GraphQL playground\", \"/query\"))\n\thttp.Handle(\"/query\", handler.GraphQL({{ lookupImport .ExecPackageName }}.NewExecutableSchema({{ lookupImport .ExecPackageName}}.Config{Resolvers: &{{ lookupImport .ResolverPackageName}}.Resolver{}})))\n\n\tlog.Printf(\"connect to http://localhost:%s/ for GraphQL playground\", port)\n\tlog.Fatal(http.ListenAndServe(\":\" + port, nil))\n}\n",
 }
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/field.gotpl b/vendor/github.com/99designs/gqlgen/codegen/templates/field.gotpl
index b33f2123..3df847fa 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/field.gotpl
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/field.gotpl
@@ -14,6 +14,9 @@
 		ctx = graphql.WithResolverContext(ctx, &graphql.ResolverContext{
 			Field: field,
 		})
+		// FIXME: subscriptions are missing request middleware stack https://github.com/99designs/gqlgen/issues/259
+		//          and Tracer stack
+		rctx := ctx
 		results, err := ec.resolvers.{{ $field.ShortInvocation }}
 		if err != nil {
 			ec.Error(ctx, err)
@@ -32,6 +35,8 @@
 {{ else }}
 	// nolint: vetshadow
 	func (ec *executionContext) _{{$object.GQLType}}_{{$field.GQLName}}(ctx context.Context, field graphql.CollectedField, {{if not $object.Root}}obj *{{$object.FullName}}{{end}}) graphql.Marshaler {
+		ctx = ec.Tracer.StartFieldExecution(ctx, field)
+		defer func () { ec.Tracer.EndFieldExecution(ctx) }()
 		{{- if $field.Args }}
 			rawArgs := field.ArgumentMap(ec.Variables)
 			args, err := {{ $field.ArgsFunc }}(rawArgs)
@@ -46,7 +51,9 @@
 			Field: field,
 		}
 		ctx = graphql.WithResolverContext(ctx, rctx)
-		resTmp := ec.FieldMiddleware(ctx, {{if $object.Root}}nil{{else}}obj{{end}}, func(ctx context.Context) (interface{}, error) {
+		ctx = ec.Tracer.StartFieldResolverExecution(ctx, rctx)
+		resTmp := ec.FieldMiddleware(ctx, {{if $object.Root}}nil{{else}}obj{{end}}, func(rctx context.Context) (interface{}, error) {
+			ctx = rctx  // use context from middleware stack in children
 			{{- if $field.IsResolver }}
 				return ec.resolvers.{{ $field.ShortInvocation }}
 			{{- else if $field.IsMethod }}
@@ -69,6 +76,7 @@
 		}
 		res := resTmp.({{$field.Signature}})
 		rctx.Result = res
+		ctx = ec.Tracer.StartFieldChildExecution(ctx)
 		{{ $field.WriteJson }}
 	}
 {{ end }}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/generated.gotpl b/vendor/github.com/99designs/gqlgen/codegen/templates/generated.gotpl
index 8250bc7a..a37a1613 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/generated.gotpl
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/generated.gotpl
@@ -3,9 +3,21 @@
 package {{ .PackageName }}
 
 import (
-{{- range $import := .Imports }}
-	{{- $import.Write }}
-{{ end }}
+	%%%IMPORTS%%%
+
+	{{ reserveImport "context"  }}
+	{{ reserveImport "fmt"  }}
+	{{ reserveImport "io"  }}
+	{{ reserveImport "strconv"  }}
+	{{ reserveImport "time"  }}
+	{{ reserveImport "sync"  }}
+	{{ reserveImport "errors"  }}
+	{{ reserveImport "bytes"  }}
+
+	{{ reserveImport "github.com/vektah/gqlparser" }}
+	{{ reserveImport "github.com/vektah/gqlparser/ast" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql/introspection" }}
 )
 
 // NewExecutableSchema creates an ExecutableSchema from the ResolverRoot interface.
@@ -126,9 +138,9 @@ func (e *executableSchema) Query(ctx context.Context, op *ast.OperationDefinitio
 		})
 
 		return &graphql.Response{
-			Data:   buf,
-			Errors: ec.Errors,
-		}
+			Data:       buf,
+			Errors:     ec.Errors,
+			Extensions: ec.Extensions,		}
 	{{- else }}
 		return graphql.ErrorResponse(ctx, "queries are not supported")
 	{{- end }}
@@ -146,8 +158,9 @@ func (e *executableSchema) Mutation(ctx context.Context, op *ast.OperationDefini
 		})
 
 		return &graphql.Response{
-			Data:   buf,
-			Errors: ec.Errors,
+			Data:       buf,
+			Errors:     ec.Errors,
+			Extensions: ec.Extensions,
 		}
 	{{- else }}
 		return graphql.ErrorResponse(ctx, "mutations are not supported")
@@ -181,8 +194,9 @@ func (e *executableSchema) Subscription(ctx context.Context, op *ast.OperationDe
 			}
 
 			return &graphql.Response{
-				Data:   buf,
-				Errors: ec.Errors,
+				Data:       buf,
+				Errors:     ec.Errors,
+				Extensions: ec.Extensions,
 			}
 		}
 	{{- else }}
@@ -250,14 +264,22 @@ func (ec *executionContext) FieldMiddleware(ctx context.Context, obj interface{}
 	return res
 }
 
-func (ec *executionContext) introspectSchema() *introspection.Schema {
-	return introspection.WrapSchema(parsedSchema)
+func (ec *executionContext) introspectSchema() (*introspection.Schema, error) {
+	if ec.DisableIntrospection {
+		return nil, errors.New("introspection disabled")
+	}
+	return introspection.WrapSchema(parsedSchema), nil
 }
 
-func (ec *executionContext) introspectType(name string) *introspection.Type {
-	return introspection.WrapTypeFromDef(parsedSchema, parsedSchema.Types[name])
+func (ec *executionContext) introspectType(name string) (*introspection.Type, error) {
+	if ec.DisableIntrospection {
+		return nil, errors.New("introspection disabled")
+	}
+	return introspection.WrapTypeFromDef(parsedSchema, parsedSchema.Types[name]), nil
 }
 
 var parsedSchema = gqlparser.MustLoadSchema(
-	&ast.Source{Name: {{.SchemaFilename|quote}}, Input: {{.SchemaRaw|rawQuote}}},
+	{{- range $filename, $schema := .SchemaRaw }}
+		&ast.Source{Name: {{$filename|quote}}, Input: {{$schema|rawQuote}}},
+	{{- end }}
 )
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/import.go b/vendor/github.com/99designs/gqlgen/codegen/templates/import.go
new file mode 100644
index 00000000..c9db2d96
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/import.go
@@ -0,0 +1,135 @@
+package templates
+
+import (
+	"fmt"
+	"go/build"
+	"strconv"
+
+	"github.com/99designs/gqlgen/internal/gopath"
+)
+
+type Import struct {
+	Name  string
+	Path  string
+	Alias string
+}
+
+type Imports struct {
+	imports []*Import
+	destDir string
+}
+
+func (i *Import) String() string {
+	if i.Alias == i.Name {
+		return strconv.Quote(i.Path)
+	}
+
+	return i.Alias + " " + strconv.Quote(i.Path)
+}
+
+func (s *Imports) String() string {
+	res := ""
+	for i, imp := range s.imports {
+		if i != 0 {
+			res += "\n"
+		}
+		res += imp.String()
+	}
+	return res
+}
+
+func (s *Imports) Reserve(path string, aliases ...string) string {
+	if path == "" {
+		panic("empty ambient import")
+	}
+
+	// if we are referencing our own package we dont need an import
+	if gopath.MustDir2Import(s.destDir) == path {
+		return ""
+	}
+
+	pkg, err := build.Default.Import(path, s.destDir, 0)
+	if err != nil {
+		panic(err)
+	}
+
+	var alias string
+	if len(aliases) != 1 {
+		alias = pkg.Name
+	} else {
+		alias = aliases[0]
+	}
+
+	if existing := s.findByPath(path); existing != nil {
+		panic("ambient import already exists")
+	}
+
+	if alias := s.findByAlias(alias); alias != nil {
+		panic("ambient import collides on an alias")
+	}
+
+	s.imports = append(s.imports, &Import{
+		Name:  pkg.Name,
+		Path:  path,
+		Alias: alias,
+	})
+
+	return ""
+}
+
+func (s *Imports) Lookup(path string) string {
+	if path == "" {
+		return ""
+	}
+
+	// if we are referencing our own package we dont need an import
+	if gopath.MustDir2Import(s.destDir) == path {
+		return ""
+	}
+
+	if existing := s.findByPath(path); existing != nil {
+		return existing.Alias
+	}
+
+	pkg, err := build.Default.Import(path, s.destDir, 0)
+	if err != nil {
+		panic(err)
+	}
+
+	imp := &Import{
+		Name: pkg.Name,
+		Path: path,
+	}
+	s.imports = append(s.imports, imp)
+
+	alias := imp.Name
+	i := 1
+	for s.findByAlias(alias) != nil {
+		alias = imp.Name + strconv.Itoa(i)
+		i++
+		if i > 10 {
+			panic(fmt.Errorf("too many collisions, last attempt was %s", alias))
+		}
+	}
+	imp.Alias = alias
+
+	return imp.Alias
+}
+
+func (s Imports) findByPath(importPath string) *Import {
+	for _, imp := range s.imports {
+		if imp.Path == importPath {
+			return imp
+		}
+	}
+	return nil
+}
+
+func (s Imports) findByAlias(alias string) *Import {
+	for _, imp := range s.imports {
+		if imp.Alias == alias {
+			return imp
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/models.gotpl b/vendor/github.com/99designs/gqlgen/codegen/templates/models.gotpl
index 7427d71d..db63a996 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/models.gotpl
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/models.gotpl
@@ -3,15 +3,29 @@
 package {{ .PackageName }}
 
 import (
-{{- range $import := .Imports }}
-	{{- $import.Write }}
-{{ end }}
+	%%%IMPORTS%%%
+
+	{{ reserveImport "context"  }}
+	{{ reserveImport "fmt"  }}
+	{{ reserveImport "io"  }}
+	{{ reserveImport "strconv"  }}
+	{{ reserveImport "time"  }}
+	{{ reserveImport "sync"  }}
+	{{ reserveImport "errors"  }}
+	{{ reserveImport "bytes"  }}
+
+	{{ reserveImport "github.com/vektah/gqlparser" }}
+	{{ reserveImport "github.com/vektah/gqlparser/ast" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql/introspection" }}
 )
 
 {{ range $model := .Models }}
 	{{with .Description}} {{.|prefixLines "// "}} {{end}}
 	{{- if .IsInterface }}
-		type {{.GoType}} interface {}
+		type {{.GoType}} interface {
+			Is{{.GoType}}()
+		}
 	{{- else }}
 		type {{.GoType}} struct {
 			{{- range $field := .Fields }}
@@ -25,6 +39,11 @@ import (
 				{{- end }}
 			{{- end }}
 		}
+
+		{{- range $iface := .Implements }}
+			func ({{$model.GoType}}) Is{{$iface.GoType}}() {}
+		{{- end }}
+
 	{{- end }}
 {{- end}}
 
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/resolver.gotpl b/vendor/github.com/99designs/gqlgen/codegen/templates/resolver.gotpl
index dd8acf24..53ba8c43 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/resolver.gotpl
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/resolver.gotpl
@@ -1,11 +1,22 @@
-//go:generate gorunpkg github.com/99designs/gqlgen
-
 package {{ .PackageName }}
 
 import (
-{{- range $import := .Imports }}
-	{{- $import.Write }}
-{{ end }}
+	%%%IMPORTS%%%
+
+	{{ reserveImport "context"  }}
+	{{ reserveImport "fmt"  }}
+	{{ reserveImport "io"  }}
+	{{ reserveImport "strconv"  }}
+	{{ reserveImport "time"  }}
+	{{ reserveImport "sync"  }}
+	{{ reserveImport "errors"  }}
+	{{ reserveImport "bytes"  }}
+
+	{{ reserveImport "github.com/99designs/gqlgen/handler" }}
+	{{ reserveImport "github.com/vektah/gqlparser" }}
+	{{ reserveImport "github.com/vektah/gqlparser/ast" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql" }}
+	{{ reserveImport "github.com/99designs/gqlgen/graphql/introspection" }}
 )
 
 type {{.ResolverType}} struct {}
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/server.gotpl b/vendor/github.com/99designs/gqlgen/codegen/templates/server.gotpl
index f23b30e1..38dc0d18 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/server.gotpl
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/server.gotpl
@@ -1,9 +1,13 @@
 package main
 
 import (
-{{- range $import := .Imports }}
-	{{- $import.Write }}
-{{ end }}
+	%%%IMPORTS%%%
+
+	{{ reserveImport "context" }}
+	{{ reserveImport "log" }}
+	{{ reserveImport "net/http" }}
+	{{ reserveImport "os" }}
+	{{ reserveImport "github.com/99designs/gqlgen/handler" }}
 )
 
 const defaultPort = "8080"
@@ -15,7 +19,7 @@ func main() {
 	}
 
 	http.Handle("/", handler.Playground("GraphQL playground", "/query"))
-	http.Handle("/query", handler.GraphQL({{.ExecPackageName}}.NewExecutableSchema({{.ExecPackageName}}.Config{Resolvers: &{{.ResolverPackageName}}.Resolver{}})))
+	http.Handle("/query", handler.GraphQL({{ lookupImport .ExecPackageName }}.NewExecutableSchema({{ lookupImport .ExecPackageName}}.Config{Resolvers: &{{ lookupImport .ResolverPackageName}}.Resolver{}})))
 
 	log.Printf("connect to http://localhost:%s/ for GraphQL playground", port)
 	log.Fatal(http.ListenAndServe(":" + port, nil))
diff --git a/vendor/github.com/99designs/gqlgen/codegen/templates/templates.go b/vendor/github.com/99designs/gqlgen/codegen/templates/templates.go
index df909cb5..22e5d739 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/templates/templates.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/templates/templates.go
@@ -14,21 +14,25 @@ import (
 	"text/template"
 	"unicode"
 
-	"log"
+	"github.com/99designs/gqlgen/internal/imports"
 
 	"github.com/pkg/errors"
-	"golang.org/x/tools/imports"
 )
 
+// this is done with a global because subtemplates currently get called in functions. Lets aim to remove this eventually.
+var CurrentImports *Imports
+
 func Run(name string, tpldata interface{}) (*bytes.Buffer, error) {
 	t := template.New("").Funcs(template.FuncMap{
-		"ucFirst":     ucFirst,
-		"lcFirst":     lcFirst,
-		"quote":       strconv.Quote,
-		"rawQuote":    rawQuote,
-		"toCamel":     ToCamel,
-		"dump":        dump,
-		"prefixLines": prefixLines,
+		"ucFirst":       ucFirst,
+		"lcFirst":       lcFirst,
+		"quote":         strconv.Quote,
+		"rawQuote":      rawQuote,
+		"toCamel":       ToCamel,
+		"dump":          dump,
+		"prefixLines":   prefixLines,
+		"reserveImport": CurrentImports.Reserve,
+		"lookupImport":  CurrentImports.Lookup,
 	})
 
 	for filename, data := range data {
@@ -149,27 +153,21 @@ func prefixLines(prefix, s string) string {
 }
 
 func RenderToFile(tpl string, filename string, data interface{}) error {
+	if CurrentImports != nil {
+		panic(fmt.Errorf("recursive or concurrent call to RenderToFile detected"))
+	}
+	CurrentImports = &Imports{destDir: filepath.Dir(filename)}
+
 	var buf *bytes.Buffer
 	buf, err := Run(tpl, data)
 	if err != nil {
 		return errors.Wrap(err, filename+" generation failed")
 	}
 
-	if err := write(filename, buf.Bytes()); err != nil {
-		return err
-	}
-
-	log.Println(filename)
+	b := bytes.Replace(buf.Bytes(), []byte("%%%IMPORTS%%%"), []byte(CurrentImports.String()), -1)
+	CurrentImports = nil
 
-	return nil
-}
-
-func gofmt(filename string, b []byte) ([]byte, error) {
-	out, err := imports.Process(filename, b, nil)
-	if err != nil {
-		return b, errors.Wrap(err, "unable to gofmt")
-	}
-	return out, nil
+	return write(filename, b)
 }
 
 func write(filename string, b []byte) error {
@@ -178,9 +176,9 @@ func write(filename string, b []byte) error {
 		return errors.Wrap(err, "failed to create directory")
 	}
 
-	formatted, err := gofmt(filename, b)
+	formatted, err := imports.Prune(filename, b)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "gofmt failed: %s\n", err.Error())
+		fmt.Fprintf(os.Stderr, "gofmt failed on %s: %s\n", filepath.Base(filename), err.Error())
 		formatted = b
 	}
 
diff --git a/vendor/github.com/99designs/gqlgen/codegen/type.go b/vendor/github.com/99designs/gqlgen/codegen/type.go
index 8c53fe55..04d9bb2f 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/type.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/type.go
@@ -4,6 +4,8 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/99designs/gqlgen/codegen/templates"
+
 	"github.com/vektah/gqlparser/ast"
 )
 
@@ -19,10 +21,9 @@ type NamedType struct {
 }
 
 type Ref struct {
-	GoType        string  // Name of the go type
-	Package       string  // the package the go type lives in
-	Import        *Import // the resolved import with alias
-	IsUserDefined bool    // does the type exist in the typemap
+	GoType        string // Name of the go type
+	Package       string // the package the go type lives in
+	IsUserDefined bool   // does the type exist in the typemap
 }
 
 type Type struct {
@@ -43,10 +44,13 @@ func (t Ref) FullName() string {
 }
 
 func (t Ref) PkgDot() string {
-	if t.Import == nil || t.Import.Alias() == "" {
+	name := templates.CurrentImports.Lookup(t.Package)
+	if name == "" {
 		return ""
+
 	}
-	return t.Import.Alias() + "."
+
+	return name + "."
 }
 
 func (t Type) Signature() string {
diff --git a/vendor/github.com/99designs/gqlgen/codegen/type_build.go b/vendor/github.com/99designs/gqlgen/codegen/type_build.go
index f0ec6785..586b0db2 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/type_build.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/type_build.go
@@ -27,7 +27,7 @@ func (cfg *Config) buildNamedTypes() NamedTypes {
 	return types
 }
 
-func (cfg *Config) bindTypes(imports *Imports, namedTypes NamedTypes, destDir string, prog *loader.Program) {
+func (cfg *Config) bindTypes(namedTypes NamedTypes, destDir string, prog *loader.Program) {
 	for _, t := range namedTypes {
 		if t.Package == "" {
 			continue
@@ -41,7 +41,6 @@ func (cfg *Config) bindTypes(imports *Imports, namedTypes NamedTypes, destDir st
 			t.Marshaler = &cpy
 
 			t.Package, t.GoType = pkgAndType(sig.Params().At(0).Type().String())
-			t.Import = imports.add(t.Package)
 		}
 	}
 }
diff --git a/vendor/github.com/99designs/gqlgen/codegen/util.go b/vendor/github.com/99designs/gqlgen/codegen/util.go
index 1849f100..cc6246fd 100644
--- a/vendor/github.com/99designs/gqlgen/codegen/util.go
+++ b/vendor/github.com/99designs/gqlgen/codegen/util.go
@@ -105,6 +105,12 @@ func findMethod(typ *types.Named, name string) *types.Func {
 	return nil
 }
 
+func equalFieldName(source, target string) bool {
+	source = strings.Replace(source, "_", "", -1)
+	target = strings.Replace(target, "_", "", -1)
+	return strings.EqualFold(source, target)
+}
+
 // findField attempts to match the name to a struct field with the following
 // priorites:
 // 1. If struct tag is passed then struct tag has highest priority
@@ -120,7 +126,7 @@ func findField(typ *types.Struct, name, structTag string) (*types.Var, error) {
 		if structTag != "" {
 			tags := reflect.StructTag(typ.Tag(i))
 			if val, ok := tags.Lookup(structTag); ok {
-				if strings.EqualFold(val, name) {
+				if equalFieldName(val, name) {
 					if foundField != nil && foundFieldWasTag {
 						return nil, errors.Errorf("tag %s is ambigious; multiple fields have the same tag value of %s", structTag, val)
 					}
@@ -132,17 +138,16 @@ func findField(typ *types.Struct, name, structTag string) (*types.Var, error) {
 		}
 
 		if field.Anonymous() {
-			if named, ok := field.Type().(*types.Struct); ok {
-				f, err := findField(named, name, structTag)
-				if err != nil && !strings.HasPrefix(err.Error(), "no field named") {
-					return nil, err
-				}
-				if f != nil && foundField == nil {
-					foundField = f
-				}
+
+			fieldType := field.Type()
+
+			if ptr, ok := fieldType.(*types.Pointer); ok {
+				fieldType = ptr.Elem()
 			}
 
-			if named, ok := field.Type().Underlying().(*types.Struct); ok {
+			// Type.Underlying() returns itself for all types except types.Named, where it returns a struct type.
+			// It should be safe to always call.
+			if named, ok := fieldType.Underlying().(*types.Struct); ok {
 				f, err := findField(named, name, structTag)
 				if err != nil && !strings.HasPrefix(err.Error(), "no field named") {
 					return nil, err
@@ -157,7 +162,7 @@ func findField(typ *types.Struct, name, structTag string) (*types.Var, error) {
 			continue
 		}
 
-		if strings.EqualFold(field.Name(), name) && foundField == nil {
+		if equalFieldName(field.Name(), name) && foundField == nil { // aqui!
 			foundField = field
 		}
 	}
@@ -198,7 +203,7 @@ func (b BindErrors) Error() string {
 	return strings.Join(errs, "\n\n")
 }
 
-func bindObject(t types.Type, object *Object, imports *Imports, structTag string) BindErrors {
+func bindObject(t types.Type, object *Object, structTag string) BindErrors {
 	var errs BindErrors
 	for i := range object.Fields {
 		field := &object.Fields[i]
@@ -208,13 +213,13 @@ func bindObject(t types.Type, object *Object, imports *Imports, structTag string
 		}
 
 		// first try binding to a method
-		methodErr := bindMethod(imports, t, field)
+		methodErr := bindMethod(t, field)
 		if methodErr == nil {
 			continue
 		}
 
 		// otherwise try binding to a var
-		varErr := bindVar(imports, t, field, structTag)
+		varErr := bindVar(t, field, structTag)
 
 		if varErr != nil {
 			errs = append(errs, BindError{
@@ -229,7 +234,7 @@ func bindObject(t types.Type, object *Object, imports *Imports, structTag string
 	return errs
 }
 
-func bindMethod(imports *Imports, t types.Type, field *Field) error {
+func bindMethod(t types.Type, field *Field) error {
 	namedType, ok := t.(*types.Named)
 	if !ok {
 		return fmt.Errorf("not a named type")
@@ -250,13 +255,25 @@ func bindMethod(imports *Imports, t types.Type, field *Field) error {
 	} else if sig.Results().Len() != 2 {
 		return fmt.Errorf("method has wrong number of args")
 	}
-	newArgs, err := matchArgs(field, sig.Params())
+	params := sig.Params()
+	// If the first argument is the context, remove it from the comparison and set
+	// the MethodHasContext flag so that the context will be passed to this model's method
+	if params.Len() > 0 && params.At(0).Type().String() == "context.Context" {
+		field.MethodHasContext = true
+		vars := make([]*types.Var, params.Len()-1)
+		for i := 1; i < params.Len(); i++ {
+			vars[i-1] = params.At(i)
+		}
+		params = types.NewTuple(vars...)
+	}
+
+	newArgs, err := matchArgs(field, params)
 	if err != nil {
 		return err
 	}
 
 	result := sig.Results().At(0)
-	if err := validateTypeBinding(imports, field, result.Type()); err != nil {
+	if err := validateTypeBinding(field, result.Type()); err != nil {
 		return errors.Wrap(err, "method has wrong return type")
 	}
 
@@ -268,7 +285,7 @@ func bindMethod(imports *Imports, t types.Type, field *Field) error {
 	return nil
 }
 
-func bindVar(imports *Imports, t types.Type, field *Field, structTag string) error {
+func bindVar(t types.Type, field *Field, structTag string) error {
 	underlying, ok := t.Underlying().(*types.Struct)
 	if !ok {
 		return fmt.Errorf("not a struct")
@@ -283,7 +300,7 @@ func bindVar(imports *Imports, t types.Type, field *Field, structTag string) err
 		return err
 	}
 
-	if err := validateTypeBinding(imports, field, structField.Type()); err != nil {
+	if err := validateTypeBinding(field, structField.Type()); err != nil {
 		return errors.Wrap(err, "field has wrong type")
 	}
 
@@ -316,22 +333,21 @@ nextArg:
 	return newArgs, nil
 }
 
-func validateTypeBinding(imports *Imports, field *Field, goType types.Type) error {
+func validateTypeBinding(field *Field, goType types.Type) error {
 	gqlType := normalizeVendor(field.Type.FullSignature())
 	goTypeStr := normalizeVendor(goType.String())
 
-	if goTypeStr == gqlType || "*"+goTypeStr == gqlType || goTypeStr == "*"+gqlType {
+	if equalTypes(goTypeStr, gqlType) {
 		field.Type.Modifiers = modifiersFromGoType(goType)
 		return nil
 	}
 
 	// deal with type aliases
 	underlyingStr := normalizeVendor(goType.Underlying().String())
-	if underlyingStr == gqlType || "*"+underlyingStr == gqlType || underlyingStr == "*"+gqlType {
+	if equalTypes(underlyingStr, gqlType) {
 		field.Type.Modifiers = modifiersFromGoType(goType)
 		pkg, typ := pkgAndType(goType.String())
-		imp := imports.findByPath(pkg)
-		field.AliasedType = &Ref{GoType: typ, Import: imp}
+		field.AliasedType = &Ref{GoType: typ, Package: pkg}
 		return nil
 	}
 
@@ -365,3 +381,7 @@ func normalizeVendor(pkg string) string {
 	parts := strings.Split(pkg, "/vendor/")
 	return modifiers + parts[len(parts)-1]
 }
+
+func equalTypes(goType string, gqlType string) bool {
+	return goType == gqlType || "*"+goType == gqlType || goType == "*"+gqlType || strings.Replace(goType, "[]*", "[]", -1) == gqlType
+}
diff --git a/vendor/github.com/99designs/gqlgen/graphql/context.go b/vendor/github.com/99designs/gqlgen/graphql/context.go
index 6baee83c..f83fa36f 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/context.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/context.go
@@ -17,6 +17,11 @@ type RequestContext struct {
 	RawQuery  string
 	Variables map[string]interface{}
 	Doc       *ast.QueryDocument
+
+	ComplexityLimit      int
+	OperationComplexity  int
+	DisableIntrospection bool
+
 	// ErrorPresenter will be used to generate the error
 	// message from errors given to Error().
 	ErrorPresenter      ErrorPresenterFunc
@@ -24,9 +29,12 @@ type RequestContext struct {
 	ResolverMiddleware  FieldMiddleware
 	DirectiveMiddleware FieldMiddleware
 	RequestMiddleware   RequestMiddleware
+	Tracer              Tracer
 
-	errorsMu sync.Mutex
-	Errors   gqlerror.List
+	errorsMu     sync.Mutex
+	Errors       gqlerror.List
+	extensionsMu sync.Mutex
+	Extensions   map[string]interface{}
 }
 
 func DefaultResolverMiddleware(ctx context.Context, next Resolver) (res interface{}, err error) {
@@ -51,6 +59,7 @@ func NewRequestContext(doc *ast.QueryDocument, query string, variables map[strin
 		RequestMiddleware:   DefaultRequestMiddleware,
 		Recover:             DefaultRecover,
 		ErrorPresenter:      DefaultErrorPresenter,
+		Tracer:              &NopTracer{},
 	}
 }
 
@@ -153,6 +162,21 @@ func (c *RequestContext) HasError(rctx *ResolverContext) bool {
 	return false
 }
 
+// GetErrors returns a list of errors that occurred in the current field
+func (c *RequestContext) GetErrors(rctx *ResolverContext) gqlerror.List {
+	c.errorsMu.Lock()
+	defer c.errorsMu.Unlock()
+	path := rctx.Path()
+
+	var errs gqlerror.List
+	for _, err := range c.Errors {
+		if equalPath(err.Path, path) {
+			errs = append(errs, err)
+		}
+	}
+	return errs
+}
+
 func equalPath(a []interface{}, b []interface{}) bool {
 	if len(a) != len(b) {
 		return false
@@ -176,3 +200,20 @@ func AddError(ctx context.Context, err error) {
 func AddErrorf(ctx context.Context, format string, args ...interface{}) {
 	GetRequestContext(ctx).Errorf(ctx, format, args...)
 }
+
+// RegisterExtension registers an extension, returns error if extension has already been registered
+func (c *RequestContext) RegisterExtension(key string, value interface{}) error {
+	c.extensionsMu.Lock()
+	defer c.extensionsMu.Unlock()
+
+	if c.Extensions == nil {
+		c.Extensions = make(map[string]interface{})
+	}
+
+	if _, ok := c.Extensions[key]; ok {
+		return fmt.Errorf("extension already registered for key %s", key)
+	}
+
+	c.Extensions[key] = value
+	return nil
+}
diff --git a/vendor/github.com/99designs/gqlgen/graphql/float.go b/vendor/github.com/99designs/gqlgen/graphql/float.go
index d204335c..fabbad04 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/float.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/float.go
@@ -9,7 +9,7 @@ import (
 
 func MarshalFloat(f float64) Marshaler {
 	return WriterFunc(func(w io.Writer) {
-		io.WriteString(w, fmt.Sprintf("%f", f))
+		io.WriteString(w, fmt.Sprintf("%g", f))
 	})
 }
 
diff --git a/vendor/github.com/99designs/gqlgen/graphql/introspection/introspection.go b/vendor/github.com/99designs/gqlgen/graphql/introspection/introspection.go
index baff882e..ca0b065f 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/introspection/introspection.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/introspection/introspection.go
@@ -12,19 +12,17 @@ type (
 	}
 
 	EnumValue struct {
-		Name              string
-		Description       string
-		IsDeprecated      bool
-		DeprecationReason string
+		Name        string
+		Description string
+		deprecation *ast.Directive
 	}
 
 	Field struct {
-		Name              string
-		Description       string
-		Type              *Type
-		Args              []InputValue
-		IsDeprecated      bool
-		DeprecationReason string
+		Name        string
+		Description string
+		Type        *Type
+		Args        []InputValue
+		deprecation *ast.Directive
 	}
 
 	InputValue struct {
@@ -39,20 +37,36 @@ func WrapSchema(schema *ast.Schema) *Schema {
 	return &Schema{schema: schema}
 }
 
-func isDeprecated(directives ast.DirectiveList) bool {
-	return directives.ForName("deprecated") != nil
+func (f *EnumValue) IsDeprecated() bool {
+	return f.deprecation != nil
+}
+
+func (f *EnumValue) DeprecationReason() *string {
+	if f.deprecation == nil {
+		return nil
+	}
+
+	reason := f.deprecation.Arguments.ForName("reason")
+	if reason == nil {
+		return nil
+	}
+
+	return &reason.Value.Raw
+}
+
+func (f *Field) IsDeprecated() bool {
+	return f.deprecation != nil
 }
 
-func deprecationReason(directives ast.DirectiveList) string {
-	deprecation := directives.ForName("deprecated")
-	if deprecation == nil {
-		return ""
+func (f *Field) DeprecationReason() *string {
+	if f.deprecation == nil {
+		return nil
 	}
 
-	reason := deprecation.Arguments.ForName("reason")
+	reason := f.deprecation.Arguments.ForName("reason")
 	if reason == nil {
-		return ""
+		return nil
 	}
 
-	return reason.Value.Raw
+	return &reason.Value.Raw
 }
diff --git a/vendor/github.com/99designs/gqlgen/graphql/introspection/type.go b/vendor/github.com/99designs/gqlgen/graphql/introspection/type.go
index dce144e0..b963aa0e 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/introspection/type.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/introspection/type.go
@@ -81,12 +81,11 @@ func (t *Type) Fields(includeDeprecated bool) []Field {
 		}
 
 		fields = append(fields, Field{
-			Name:              f.Name,
-			Description:       f.Description,
-			Args:              args,
-			Type:              WrapTypeFromType(t.schema, f.Type),
-			IsDeprecated:      isDeprecated(f.Directives),
-			DeprecationReason: deprecationReason(f.Directives),
+			Name:        f.Name,
+			Description: f.Description,
+			Args:        args,
+			Type:        WrapTypeFromType(t.schema, f.Type),
+			deprecation: f.Directives.ForName("deprecated"),
 		})
 	}
 	return fields
@@ -150,10 +149,9 @@ func (t *Type) EnumValues(includeDeprecated bool) []EnumValue {
 	var res []EnumValue
 	for _, val := range t.def.EnumValues {
 		res = append(res, EnumValue{
-			Name:              val.Name,
-			Description:       val.Description,
-			IsDeprecated:      isDeprecated(val.Directives),
-			DeprecationReason: deprecationReason(val.Directives),
+			Name:        val.Name,
+			Description: val.Description,
+			deprecation: val.Directives.ForName("deprecated"),
 		})
 	}
 	return res
diff --git a/vendor/github.com/99designs/gqlgen/graphql/response.go b/vendor/github.com/99designs/gqlgen/graphql/response.go
index 18664dca..6fe55d56 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/response.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/response.go
@@ -8,9 +8,13 @@ import (
 	"github.com/vektah/gqlparser/gqlerror"
 )
 
+// Errors are intentionally serialized first based on the advice in
+// https://github.com/facebook/graphql/commit/7b40390d48680b15cb93e02d46ac5eb249689876#diff-757cea6edf0288677a9eea4cfc801d87R107
+// and https://github.com/facebook/graphql/pull/384
 type Response struct {
-	Data   json.RawMessage `json:"data"`
-	Errors gqlerror.List   `json:"errors,omitempty"`
+	Errors     gqlerror.List          `json:"errors,omitempty"`
+	Data       json.RawMessage        `json:"data"`
+	Extensions map[string]interface{} `json:"extensions,omitempty"`
 }
 
 func ErrorResponse(ctx context.Context, messagef string, args ...interface{}) *Response {
diff --git a/vendor/github.com/99designs/gqlgen/graphql/tracer.go b/vendor/github.com/99designs/gqlgen/graphql/tracer.go
new file mode 100644
index 00000000..0597ce8c
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/graphql/tracer.go
@@ -0,0 +1,58 @@
+package graphql
+
+import (
+	"context"
+)
+
+var _ Tracer = (*NopTracer)(nil)
+
+type Tracer interface {
+	StartOperationParsing(ctx context.Context) context.Context
+	EndOperationParsing(ctx context.Context)
+	StartOperationValidation(ctx context.Context) context.Context
+	EndOperationValidation(ctx context.Context)
+	StartOperationExecution(ctx context.Context) context.Context
+	StartFieldExecution(ctx context.Context, field CollectedField) context.Context
+	StartFieldResolverExecution(ctx context.Context, rc *ResolverContext) context.Context
+	StartFieldChildExecution(ctx context.Context) context.Context
+	EndFieldExecution(ctx context.Context)
+	EndOperationExecution(ctx context.Context)
+}
+
+type NopTracer struct{}
+
+func (NopTracer) StartOperationParsing(ctx context.Context) context.Context {
+	return ctx
+}
+
+func (NopTracer) EndOperationParsing(ctx context.Context) {
+}
+
+func (NopTracer) StartOperationValidation(ctx context.Context) context.Context {
+	return ctx
+}
+
+func (NopTracer) EndOperationValidation(ctx context.Context) {
+}
+
+func (NopTracer) StartOperationExecution(ctx context.Context) context.Context {
+	return ctx
+}
+
+func (NopTracer) StartFieldExecution(ctx context.Context, field CollectedField) context.Context {
+	return ctx
+}
+
+func (NopTracer) StartFieldResolverExecution(ctx context.Context, rc *ResolverContext) context.Context {
+	return ctx
+}
+
+func (NopTracer) StartFieldChildExecution(ctx context.Context) context.Context {
+	return ctx
+}
+
+func (NopTracer) EndFieldExecution(ctx context.Context) {
+}
+
+func (NopTracer) EndOperationExecution(ctx context.Context) {
+}
diff --git a/vendor/github.com/99designs/gqlgen/graphql/version.go b/vendor/github.com/99designs/gqlgen/graphql/version.go
index 38d3720b..8cf3c9ba 100644
--- a/vendor/github.com/99designs/gqlgen/graphql/version.go
+++ b/vendor/github.com/99designs/gqlgen/graphql/version.go
@@ -1,3 +1,3 @@
 package graphql
 
-const Version = "v0.5.1"
+const Version = "dev"
diff --git a/vendor/github.com/99designs/gqlgen/handler/context.go b/vendor/github.com/99designs/gqlgen/handler/context.go
new file mode 100644
index 00000000..2992aa3d
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/handler/context.go
@@ -0,0 +1,57 @@
+package handler
+
+import "context"
+
+type key string
+
+const (
+	initpayload key = "ws_initpayload_context"
+)
+
+// InitPayload is a structure that is parsed from the websocket init message payload. TO use
+// request headers for non-websocket, instead wrap the graphql handler in a middleware.
+type InitPayload map[string]interface{}
+
+// GetString safely gets a string value from the payload. It returns an empty string if the
+// payload is nil or the value isn't set.
+func (payload InitPayload) GetString(key string) string {
+	if payload == nil {
+		return ""
+	}
+
+	if value, ok := payload[key]; ok {
+		res, _ := value.(string)
+		return res
+	}
+
+	return ""
+}
+
+// Authorization is a short hand for getting the Authorization header from the
+// payload.
+func (payload InitPayload) Authorization() string {
+	if value := payload.GetString("Authorization"); value != "" {
+		return value
+	}
+
+	if value := payload.GetString("authorization"); value != "" {
+		return value
+	}
+
+	return ""
+}
+
+func withInitPayload(ctx context.Context, payload InitPayload) context.Context {
+	return context.WithValue(ctx, initpayload, payload)
+}
+
+// GetInitPayload gets a map of the data sent with the connection_init message, which is used by
+// graphql clients as a stand-in for HTTP headers.
+func GetInitPayload(ctx context.Context) InitPayload {
+	payload, ok := ctx.Value(initpayload).(InitPayload)
+	if !ok {
+		return nil
+	}
+
+	return payload
+}
diff --git a/vendor/github.com/99designs/gqlgen/handler/graphql.go b/vendor/github.com/99designs/gqlgen/handler/graphql.go
index 9d222826..eb8880de 100644
--- a/vendor/github.com/99designs/gqlgen/handler/graphql.go
+++ b/vendor/github.com/99designs/gqlgen/handler/graphql.go
@@ -12,9 +12,9 @@ import (
 	"github.com/99designs/gqlgen/graphql"
 	"github.com/gorilla/websocket"
 	"github.com/hashicorp/golang-lru"
-	"github.com/vektah/gqlparser"
 	"github.com/vektah/gqlparser/ast"
 	"github.com/vektah/gqlparser/gqlerror"
+	"github.com/vektah/gqlparser/parser"
 	"github.com/vektah/gqlparser/validator"
 )
 
@@ -25,17 +25,21 @@ type params struct {
 }
 
 type Config struct {
-	cacheSize       int
-	upgrader        websocket.Upgrader
-	recover         graphql.RecoverFunc
-	errorPresenter  graphql.ErrorPresenterFunc
-	resolverHook    graphql.FieldMiddleware
-	requestHook     graphql.RequestMiddleware
-	complexityLimit int
+	cacheSize            int
+	upgrader             websocket.Upgrader
+	recover              graphql.RecoverFunc
+	errorPresenter       graphql.ErrorPresenterFunc
+	resolverHook         graphql.FieldMiddleware
+	requestHook          graphql.RequestMiddleware
+	tracer               graphql.Tracer
+	complexityLimit      int
+	disableIntrospection bool
 }
 
-func (c *Config) newRequestContext(doc *ast.QueryDocument, query string, variables map[string]interface{}) *graphql.RequestContext {
+func (c *Config) newRequestContext(es graphql.ExecutableSchema, doc *ast.QueryDocument, op *ast.OperationDefinition, query string, variables map[string]interface{}) *graphql.RequestContext {
 	reqCtx := graphql.NewRequestContext(doc, query, variables)
+	reqCtx.DisableIntrospection = c.disableIntrospection
+
 	if hook := c.recover; hook != nil {
 		reqCtx.Recover = hook
 	}
@@ -52,6 +56,18 @@ func (c *Config) newRequestContext(doc *ast.QueryDocument, query string, variabl
 		reqCtx.RequestMiddleware = hook
 	}
 
+	if hook := c.tracer; hook != nil {
+		reqCtx.Tracer = hook
+	} else {
+		reqCtx.Tracer = &graphql.NopTracer{}
+	}
+
+	if c.complexityLimit > 0 {
+		reqCtx.ComplexityLimit = c.complexityLimit
+		operationComplexity := complexity.Calculate(es, op, variables)
+		reqCtx.OperationComplexity = operationComplexity
+	}
+
 	return reqCtx
 }
 
@@ -78,6 +94,14 @@ func ErrorPresenter(f graphql.ErrorPresenterFunc) Option {
 	}
 }
 
+// IntrospectionEnabled = false will forbid clients from calling introspection endpoints. Can be useful in prod when you dont
+// want clients introspecting the full schema.
+func IntrospectionEnabled(enabled bool) Option {
+	return func(cfg *Config) {
+		cfg.disableIntrospection = !enabled
+	}
+}
+
 // ComplexityLimit sets a maximum query complexity that is allowed to be executed.
 // If a query is submitted that exceeds the limit, a 422 status code will be returned.
 func ComplexityLimit(limit int) Option {
@@ -87,7 +111,7 @@ func ComplexityLimit(limit int) Option {
 }
 
 // ResolverMiddleware allows you to define a function that will be called around every resolver,
-// useful for tracing and logging.
+// useful for logging.
 func ResolverMiddleware(middleware graphql.FieldMiddleware) Option {
 	return func(cfg *Config) {
 		if cfg.resolverHook == nil {
@@ -105,7 +129,7 @@ func ResolverMiddleware(middleware graphql.FieldMiddleware) Option {
 }
 
 // RequestMiddleware allows you to define a function that will be called around the root request,
-// after the query has been parsed. This is useful for logging and tracing
+// after the query has been parsed. This is useful for logging
 func RequestMiddleware(middleware graphql.RequestMiddleware) Option {
 	return func(cfg *Config) {
 		if cfg.requestHook == nil {
@@ -122,6 +146,93 @@ func RequestMiddleware(middleware graphql.RequestMiddleware) Option {
 	}
 }
 
+// Tracer allows you to add a request/resolver tracer that will be called around the root request,
+// calling resolver. This is useful for tracing
+func Tracer(tracer graphql.Tracer) Option {
+	return func(cfg *Config) {
+		if cfg.tracer == nil {
+			cfg.tracer = tracer
+
+		} else {
+			lastResolve := cfg.tracer
+			cfg.tracer = &tracerWrapper{
+				tracer1: lastResolve,
+				tracer2: tracer,
+			}
+		}
+
+		opt := RequestMiddleware(func(ctx context.Context, next func(ctx context.Context) []byte) []byte {
+			ctx = tracer.StartOperationExecution(ctx)
+			resp := next(ctx)
+			tracer.EndOperationExecution(ctx)
+
+			return resp
+		})
+		opt(cfg)
+	}
+}
+
+type tracerWrapper struct {
+	tracer1 graphql.Tracer
+	tracer2 graphql.Tracer
+}
+
+func (tw *tracerWrapper) StartOperationParsing(ctx context.Context) context.Context {
+	ctx = tw.tracer1.StartOperationParsing(ctx)
+	ctx = tw.tracer2.StartOperationParsing(ctx)
+	return ctx
+}
+
+func (tw *tracerWrapper) EndOperationParsing(ctx context.Context) {
+	tw.tracer2.EndOperationParsing(ctx)
+	tw.tracer1.EndOperationParsing(ctx)
+}
+
+func (tw *tracerWrapper) StartOperationValidation(ctx context.Context) context.Context {
+	ctx = tw.tracer1.StartOperationValidation(ctx)
+	ctx = tw.tracer2.StartOperationValidation(ctx)
+	return ctx
+}
+
+func (tw *tracerWrapper) EndOperationValidation(ctx context.Context) {
+	tw.tracer2.EndOperationValidation(ctx)
+	tw.tracer1.EndOperationValidation(ctx)
+}
+
+func (tw *tracerWrapper) StartOperationExecution(ctx context.Context) context.Context {
+	ctx = tw.tracer1.StartOperationExecution(ctx)
+	ctx = tw.tracer2.StartOperationExecution(ctx)
+	return ctx
+}
+
+func (tw *tracerWrapper) StartFieldExecution(ctx context.Context, field graphql.CollectedField) context.Context {
+	ctx = tw.tracer1.StartFieldExecution(ctx, field)
+	ctx = tw.tracer2.StartFieldExecution(ctx, field)
+	return ctx
+}
+
+func (tw *tracerWrapper) StartFieldResolverExecution(ctx context.Context, rc *graphql.ResolverContext) context.Context {
+	ctx = tw.tracer1.StartFieldResolverExecution(ctx, rc)
+	ctx = tw.tracer2.StartFieldResolverExecution(ctx, rc)
+	return ctx
+}
+
+func (tw *tracerWrapper) StartFieldChildExecution(ctx context.Context) context.Context {
+	ctx = tw.tracer1.StartFieldChildExecution(ctx)
+	ctx = tw.tracer2.StartFieldChildExecution(ctx)
+	return ctx
+}
+
+func (tw *tracerWrapper) EndFieldExecution(ctx context.Context) {
+	tw.tracer2.EndFieldExecution(ctx)
+	tw.tracer1.EndFieldExecution(ctx)
+}
+
+func (tw *tracerWrapper) EndOperationExecution(ctx context.Context) {
+	tw.tracer2.EndOperationExecution(ctx)
+	tw.tracer1.EndOperationExecution(ctx)
+}
+
 // CacheSize sets the maximum size of the query cache.
 // If size is less than or equal to 0, the cache is disabled.
 func CacheSize(size int) Option {
@@ -133,7 +244,7 @@ func CacheSize(size int) Option {
 const DefaultCacheSize = 1000
 
 func GraphQL(exec graphql.ExecutableSchema, options ...Option) http.HandlerFunc {
-	cfg := Config{
+	cfg := &Config{
 		cacheSize: DefaultCacheSize,
 		upgrader: websocket.Upgrader{
 			ReadBufferSize:  1024,
@@ -142,7 +253,7 @@ func GraphQL(exec graphql.ExecutableSchema, options ...Option) http.HandlerFunc
 	}
 
 	for _, option := range options {
-		option(&cfg)
+		option(cfg)
 	}
 
 	var cache *lru.Cache
@@ -155,112 +266,187 @@ func GraphQL(exec graphql.ExecutableSchema, options ...Option) http.HandlerFunc
 			panic("unexpected error creating cache: " + err.Error())
 		}
 	}
+	if cfg.tracer == nil {
+		cfg.tracer = &graphql.NopTracer{}
+	}
 
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method == http.MethodOptions {
-			w.Header().Set("Allow", "OPTIONS, GET, POST")
-			w.WriteHeader(http.StatusOK)
-			return
-		}
+	handler := &graphqlHandler{
+		cfg:   cfg,
+		cache: cache,
+		exec:  exec,
+	}
 
-		if strings.Contains(r.Header.Get("Upgrade"), "websocket") {
-			connectWs(exec, w, r, &cfg)
-			return
-		}
+	return handler.ServeHTTP
+}
 
-		var reqParams params
-		switch r.Method {
-		case http.MethodGet:
-			reqParams.Query = r.URL.Query().Get("query")
-			reqParams.OperationName = r.URL.Query().Get("operationName")
-
-			if variables := r.URL.Query().Get("variables"); variables != "" {
-				if err := jsonDecode(strings.NewReader(variables), &reqParams.Variables); err != nil {
-					sendErrorf(w, http.StatusBadRequest, "variables could not be decoded")
-					return
-				}
-			}
-		case http.MethodPost:
-			if err := jsonDecode(r.Body, &reqParams); err != nil {
-				sendErrorf(w, http.StatusBadRequest, "json body could not be decoded: "+err.Error())
+var _ http.Handler = (*graphqlHandler)(nil)
+
+type graphqlHandler struct {
+	cfg   *Config
+	cache *lru.Cache
+	exec  graphql.ExecutableSchema
+}
+
+func (gh *graphqlHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method == http.MethodOptions {
+		w.Header().Set("Allow", "OPTIONS, GET, POST")
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	if strings.Contains(r.Header.Get("Upgrade"), "websocket") {
+		connectWs(gh.exec, w, r, gh.cfg)
+		return
+	}
+
+	var reqParams params
+	switch r.Method {
+	case http.MethodGet:
+		reqParams.Query = r.URL.Query().Get("query")
+		reqParams.OperationName = r.URL.Query().Get("operationName")
+
+		if variables := r.URL.Query().Get("variables"); variables != "" {
+			if err := jsonDecode(strings.NewReader(variables), &reqParams.Variables); err != nil {
+				sendErrorf(w, http.StatusBadRequest, "variables could not be decoded")
 				return
 			}
-		default:
-			w.WriteHeader(http.StatusMethodNotAllowed)
+		}
+	case http.MethodPost:
+		if err := jsonDecode(r.Body, &reqParams); err != nil {
+			sendErrorf(w, http.StatusBadRequest, "json body could not be decoded: "+err.Error())
 			return
 		}
-		w.Header().Set("Content-Type", "application/json")
+	default:
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
 
-		var doc *ast.QueryDocument
-		if cache != nil {
-			val, ok := cache.Get(reqParams.Query)
-			if ok {
-				doc = val.(*ast.QueryDocument)
-			}
-		}
-		if doc == nil {
-			var qErr gqlerror.List
-			doc, qErr = gqlparser.LoadQuery(exec.Schema(), reqParams.Query)
-			if len(qErr) > 0 {
-				sendError(w, http.StatusUnprocessableEntity, qErr...)
-				return
-			}
-			if cache != nil {
-				cache.Add(reqParams.Query, doc)
-			}
-		}
+	ctx := r.Context()
 
-		op := doc.Operations.ForName(reqParams.OperationName)
-		if op == nil {
-			sendErrorf(w, http.StatusUnprocessableEntity, "operation %s not found", reqParams.OperationName)
-			return
+	var doc *ast.QueryDocument
+	var cacheHit bool
+	if gh.cache != nil {
+		val, ok := gh.cache.Get(reqParams.Query)
+		if ok {
+			doc = val.(*ast.QueryDocument)
+			cacheHit = true
 		}
+	}
 
-		if op.Operation != ast.Query && r.Method == http.MethodGet {
-			sendErrorf(w, http.StatusUnprocessableEntity, "GET requests only allow query operations")
-			return
+	ctx, doc, gqlErr := gh.parseOperation(ctx, &parseOperationArgs{
+		Query:     reqParams.Query,
+		CachedDoc: doc,
+	})
+	if gqlErr != nil {
+		sendError(w, http.StatusUnprocessableEntity, gqlErr)
+		return
+	}
+
+	ctx, op, vars, listErr := gh.validateOperation(ctx, &validateOperationArgs{
+		Doc:           doc,
+		OperationName: reqParams.OperationName,
+		CacheHit:      cacheHit,
+		R:             r,
+		Variables:     reqParams.Variables,
+	})
+	if len(listErr) != 0 {
+		sendError(w, http.StatusUnprocessableEntity, listErr...)
+		return
+	}
+
+	if gh.cache != nil && !cacheHit {
+		gh.cache.Add(reqParams.Query, doc)
+	}
+
+	reqCtx := gh.cfg.newRequestContext(gh.exec, doc, op, reqParams.Query, vars)
+	ctx = graphql.WithRequestContext(ctx, reqCtx)
+
+	defer func() {
+		if err := recover(); err != nil {
+			userErr := reqCtx.Recover(ctx, err)
+			sendErrorf(w, http.StatusUnprocessableEntity, userErr.Error())
 		}
+	}()
 
-		vars, err := validator.VariableValues(exec.Schema(), op, reqParams.Variables)
+	if reqCtx.ComplexityLimit > 0 && reqCtx.OperationComplexity > reqCtx.ComplexityLimit {
+		sendErrorf(w, http.StatusUnprocessableEntity, "operation has complexity %d, which exceeds the limit of %d", reqCtx.OperationComplexity, reqCtx.ComplexityLimit)
+		return
+	}
+
+	switch op.Operation {
+	case ast.Query:
+		b, err := json.Marshal(gh.exec.Query(ctx, op))
 		if err != nil {
-			sendError(w, http.StatusUnprocessableEntity, err)
-			return
+			panic(err)
 		}
-		reqCtx := cfg.newRequestContext(doc, reqParams.Query, vars)
-		ctx := graphql.WithRequestContext(r.Context(), reqCtx)
+		w.Write(b)
+	case ast.Mutation:
+		b, err := json.Marshal(gh.exec.Mutation(ctx, op))
+		if err != nil {
+			panic(err)
+		}
+		w.Write(b)
+	default:
+		sendErrorf(w, http.StatusBadRequest, "unsupported operation type")
+	}
+}
 
-		defer func() {
-			if err := recover(); err != nil {
-				userErr := reqCtx.Recover(ctx, err)
-				sendErrorf(w, http.StatusUnprocessableEntity, userErr.Error())
-			}
-		}()
+type parseOperationArgs struct {
+	Query     string
+	CachedDoc *ast.QueryDocument
+}
 
-		if cfg.complexityLimit > 0 {
-			queryComplexity := complexity.Calculate(exec, op, vars)
-			if queryComplexity > cfg.complexityLimit {
-				sendErrorf(w, http.StatusUnprocessableEntity, "query has complexity %d, which exceeds the limit of %d", queryComplexity, cfg.complexityLimit)
-				return
-			}
-		}
+func (gh *graphqlHandler) parseOperation(ctx context.Context, args *parseOperationArgs) (context.Context, *ast.QueryDocument, *gqlerror.Error) {
+	ctx = gh.cfg.tracer.StartOperationParsing(ctx)
+	defer func() { gh.cfg.tracer.EndOperationParsing(ctx) }()
 
-		switch op.Operation {
-		case ast.Query:
-			b, err := json.Marshal(exec.Query(ctx, op))
-			if err != nil {
-				panic(err)
-			}
-			w.Write(b)
-		case ast.Mutation:
-			b, err := json.Marshal(exec.Mutation(ctx, op))
-			if err != nil {
-				panic(err)
-			}
-			w.Write(b)
-		default:
-			sendErrorf(w, http.StatusBadRequest, "unsupported operation type")
+	if args.CachedDoc != nil {
+		return ctx, args.CachedDoc, nil
+	}
+
+	doc, gqlErr := parser.ParseQuery(&ast.Source{Input: args.Query})
+	if gqlErr != nil {
+		return ctx, nil, gqlErr
+	}
+
+	return ctx, doc, nil
+}
+
+type validateOperationArgs struct {
+	Doc           *ast.QueryDocument
+	OperationName string
+	CacheHit      bool
+	R             *http.Request
+	Variables     map[string]interface{}
+}
+
+func (gh *graphqlHandler) validateOperation(ctx context.Context, args *validateOperationArgs) (context.Context, *ast.OperationDefinition, map[string]interface{}, gqlerror.List) {
+	ctx = gh.cfg.tracer.StartOperationValidation(ctx)
+	defer func() { gh.cfg.tracer.EndOperationValidation(ctx) }()
+
+	if !args.CacheHit {
+		listErr := validator.Validate(gh.exec.Schema(), args.Doc)
+		if len(listErr) != 0 {
+			return ctx, nil, nil, listErr
 		}
-	})
+	}
+
+	op := args.Doc.Operations.ForName(args.OperationName)
+	if op == nil {
+		return ctx, nil, nil, gqlerror.List{gqlerror.Errorf("operation %s not found", args.OperationName)}
+	}
+
+	if op.Operation != ast.Query && args.R.Method == http.MethodGet {
+		return ctx, nil, nil, gqlerror.List{gqlerror.Errorf("GET requests only allow query operations")}
+	}
+
+	vars, err := validator.VariableValues(gh.exec.Schema(), op, args.Variables)
+	if err != nil {
+		return ctx, nil, nil, gqlerror.List{err}
+	}
+
+	return ctx, op, vars, nil
 }
 
 func jsonDecode(r io.Reader, val interface{}) error {
diff --git a/vendor/github.com/99designs/gqlgen/handler/playground.go b/vendor/github.com/99designs/gqlgen/handler/playground.go
index d0ada8ca..f1687def 100644
--- a/vendor/github.com/99designs/gqlgen/handler/playground.go
+++ b/vendor/github.com/99designs/gqlgen/handler/playground.go
@@ -45,7 +45,7 @@ func Playground(title string, endpoint string) http.HandlerFunc {
 		err := page.Execute(w, map[string]string{
 			"title":    title,
 			"endpoint": endpoint,
-			"version":  "1.6.2",
+			"version":  "1.7.8",
 		})
 		if err != nil {
 			panic(err)
diff --git a/vendor/github.com/99designs/gqlgen/handler/websocket.go b/vendor/github.com/99designs/gqlgen/handler/websocket.go
index 2be1e87f..dae262bd 100644
--- a/vendor/github.com/99designs/gqlgen/handler/websocket.go
+++ b/vendor/github.com/99designs/gqlgen/handler/websocket.go
@@ -43,6 +43,8 @@ type wsConnection struct {
 	active map[string]context.CancelFunc
 	mu     sync.Mutex
 	cfg    *Config
+
+	initPayload InitPayload
 }
 
 func connectWs(exec graphql.ExecutableSchema, w http.ResponseWriter, r *http.Request, cfg *Config) {
@@ -79,6 +81,14 @@ func (c *wsConnection) init() bool {
 
 	switch message.Type {
 	case connectionInitMsg:
+		if len(message.Payload) > 0 {
+			c.initPayload = make(InitPayload)
+			err := json.Unmarshal(message.Payload, &c.initPayload)
+			if err != nil {
+				return false
+			}
+		}
+
 		c.write(&operationMessage{Type: connectionAckMsg})
 	case connectionTerminateMsg:
 		c.close(websocket.CloseNormalClosure, "terminated")
@@ -155,9 +165,13 @@ func (c *wsConnection) subscribe(message *operationMessage) bool {
 		c.sendError(message.ID, err)
 		return true
 	}
-	reqCtx := c.cfg.newRequestContext(doc, reqParams.Query, vars)
+	reqCtx := c.cfg.newRequestContext(c.exec, doc, op, reqParams.Query, vars)
 	ctx := graphql.WithRequestContext(c.ctx, reqCtx)
 
+	if c.initPayload != nil {
+		ctx = withInitPayload(ctx, c.initPayload)
+	}
+
 	if op.Operation != ast.Subscription {
 		var result *graphql.Response
 		if op.Operation == ast.Query {
diff --git a/vendor/github.com/99designs/gqlgen/internal/imports/prune.go b/vendor/github.com/99designs/gqlgen/internal/imports/prune.go
new file mode 100644
index 00000000..d2469e83
--- /dev/null
+++ b/vendor/github.com/99designs/gqlgen/internal/imports/prune.go
@@ -0,0 +1,119 @@
+// Wrapper around x/tools/imports that only removes imports, never adds new ones.
+
+package imports
+
+import (
+	"bytes"
+	"go/ast"
+	"go/build"
+	"go/parser"
+	"go/printer"
+	"go/token"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/tools/imports"
+
+	"golang.org/x/tools/go/ast/astutil"
+)
+
+type visitFn func(node ast.Node)
+
+func (fn visitFn) Visit(node ast.Node) ast.Visitor {
+	fn(node)
+	return fn
+}
+
+// Prune removes any unused imports
+func Prune(filename string, src []byte) ([]byte, error) {
+	fset := token.NewFileSet()
+
+	file, err := parser.ParseFile(fset, filename, src, parser.ParseComments|parser.AllErrors)
+	if err != nil {
+		return nil, err
+	}
+
+	unused, err := getUnusedImports(file, filename)
+	if err != nil {
+		return nil, err
+	}
+	for ipath, name := range unused {
+		astutil.DeleteNamedImport(fset, file, name, ipath)
+	}
+	printConfig := &printer.Config{Mode: printer.TabIndent, Tabwidth: 8}
+
+	var buf bytes.Buffer
+	if err := printConfig.Fprint(&buf, fset, file); err != nil {
+		return nil, err
+	}
+
+	return imports.Process(filename, buf.Bytes(), &imports.Options{FormatOnly: true, Comments: true, TabIndent: true, TabWidth: 8})
+}
+
+func getUnusedImports(file ast.Node, filename string) (map[string]string, error) {
+	imported := map[string]*ast.ImportSpec{}
+	used := map[string]bool{}
+
+	abs, err := filepath.Abs(filename)
+	if err != nil {
+		return nil, err
+	}
+	srcDir := filepath.Dir(abs)
+
+	ast.Walk(visitFn(func(node ast.Node) {
+		if node == nil {
+			return
+		}
+		switch v := node.(type) {
+		case *ast.ImportSpec:
+			if v.Name != nil {
+				imported[v.Name.Name] = v
+				break
+			}
+			ipath := strings.Trim(v.Path.Value, `"`)
+			if ipath == "C" {
+				break
+			}
+
+			local := importPathToName(ipath, srcDir)
+
+			imported[local] = v
+		case *ast.SelectorExpr:
+			xident, ok := v.X.(*ast.Ident)
+			if !ok {
+				break
+			}
+			if xident.Obj != nil {
+				// if the parser can resolve it, it's not a package ref
+				break
+			}
+			used[xident.Name] = true
+		}
+	}), file)
+
+	for pkg := range used {
+		delete(imported, pkg)
+	}
+
+	unusedImport := map[string]string{}
+	for pkg, is := range imported {
+		if !used[pkg] && pkg != "_" && pkg != "." {
+			name := ""
+			if is.Name != nil {
+				name = is.Name.Name
+			}
+			unusedImport[strings.Trim(is.Path.Value, `"`)] = name
+		}
+	}
+
+	return unusedImport, nil
+}
+
+func importPathToName(importPath, srcDir string) (packageName string) {
+	pkg, err := build.Default.Import(importPath, srcDir, 0)
+	if err != nil {
+		return ""
+	}
+
+	return pkg.Name
+}
diff --git a/vendor/github.com/urfave/cli/.flake8 b/vendor/github.com/urfave/cli/.flake8
new file mode 100644
index 00000000..6deafc26
--- /dev/null
+++ b/vendor/github.com/urfave/cli/.flake8
@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 120
diff --git a/vendor/github.com/urfave/cli/.gitignore b/vendor/github.com/urfave/cli/.gitignore
new file mode 100644
index 00000000..faf70c4c
--- /dev/null
+++ b/vendor/github.com/urfave/cli/.gitignore
@@ -0,0 +1,2 @@
+*.coverprofile
+node_modules/
diff --git a/vendor/github.com/urfave/cli/.travis.yml b/vendor/github.com/urfave/cli/.travis.yml
new file mode 100644
index 00000000..cf8d0980
--- /dev/null
+++ b/vendor/github.com/urfave/cli/.travis.yml
@@ -0,0 +1,27 @@
+language: go
+sudo: false
+dist: trusty
+osx_image: xcode8.3
+go: 1.8.x
+
+os:
+- linux
+- osx
+
+cache:
+  directories:
+  - node_modules
+
+before_script:
+- go get github.com/urfave/gfmrun/... || true
+- go get golang.org/x/tools/cmd/goimports
+- if [ ! -f node_modules/.bin/markdown-toc ] ; then
+    npm install markdown-toc ;
+  fi
+
+script:
+- ./runtests gen
+- ./runtests vet
+- ./runtests test
+- ./runtests gfmrun
+- ./runtests toc
diff --git a/vendor/github.com/urfave/cli/CHANGELOG.md b/vendor/github.com/urfave/cli/CHANGELOG.md
new file mode 100644
index 00000000..401eae5a
--- /dev/null
+++ b/vendor/github.com/urfave/cli/CHANGELOG.md
@@ -0,0 +1,435 @@
+# Change Log
+
+**ATTN**: This project uses [semantic versioning](http://semver.org/).
+
+## [Unreleased]
+
+## 1.20.0 - 2017-08-10
+
+### Fixed
+
+* `HandleExitCoder` is now correctly iterates over all errors in
+  a `MultiError`. The exit code is the exit code of the last error or `1` if
+  there are no `ExitCoder`s in the `MultiError`.
+* Fixed YAML file loading on Windows (previously would fail validate the file path)
+* Subcommand `Usage`, `Description`, `ArgsUsage`, `OnUsageError` correctly
+  propogated
+* `ErrWriter` is now passed downwards through command structure to avoid the
+  need to redefine it
+* Pass `Command` context into `OnUsageError` rather than parent context so that
+  all fields are avaiable
+* Errors occuring in `Before` funcs are no longer double printed
+* Use `UsageText` in the help templates for commands and subcommands if
+  defined; otherwise build the usage as before (was previously ignoring this
+  field)
+* `IsSet` and `GlobalIsSet` now correctly return whether a flag is set if
+  a program calls `Set` or `GlobalSet` directly after flag parsing (would
+  previously only return `true` if the flag was set during parsing)
+
+### Changed
+
+* No longer exit the program on command/subcommand error if the error raised is
+  not an `OsExiter`. This exiting behavior was introduced in 1.19.0, but was
+  determined to be a regression in functionality. See [the
+  PR](https://github.com/urfave/cli/pull/595) for discussion.
+
+### Added
+
+* `CommandsByName` type was added to make it easy to sort `Command`s by name,
+  alphabetically
+* `altsrc` now handles loading of string and int arrays from TOML
+* Support for definition of custom help templates for `App` via
+  `CustomAppHelpTemplate`
+* Support for arbitrary key/value fields on `App` to be used with
+  `CustomAppHelpTemplate` via `ExtraInfo`
+* `HelpFlag`, `VersionFlag`, and `BashCompletionFlag` changed to explictly be
+  `cli.Flag`s allowing for the use of custom flags satisfying the `cli.Flag`
+  interface to be used.
+
+
+## [1.19.1] - 2016-11-21
+
+### Fixed
+
+- Fixes regression introduced in 1.19.0 where using an `ActionFunc` as
+  the `Action` for a command would cause it to error rather than calling the
+  function. Should not have a affected declarative cases using `func(c
+  *cli.Context) err)`.
+- Shell completion now handles the case where the user specifies
+  `--generate-bash-completion` immediately after a flag that takes an argument.
+  Previously it call the application with `--generate-bash-completion` as the
+  flag value.
+
+## [1.19.0] - 2016-11-19
+### Added
+- `FlagsByName` was added to make it easy to sort flags (e.g. `sort.Sort(cli.FlagsByName(app.Flags))`)
+- A `Description` field was added to `App` for a more detailed description of
+  the application (similar to the existing `Description` field on `Command`)
+- Flag type code generation via `go generate`
+- Write to stderr and exit 1 if action returns non-nil error
+- Added support for TOML to the `altsrc` loader
+- `SkipArgReorder` was added to allow users to skip the argument reordering.
+  This is useful if you want to consider all "flags" after an argument as
+  arguments rather than flags (the default behavior of the stdlib `flag`
+  library). This is backported functionality from the [removal of the flag
+  reordering](https://github.com/urfave/cli/pull/398) in the unreleased version
+  2
+- For formatted errors (those implementing `ErrorFormatter`), the errors will
+  be formatted during output. Compatible with `pkg/errors`.
+
+### Changed
+- Raise minimum tested/supported Go version to 1.2+
+
+### Fixed
+- Consider empty environment variables as set (previously environment variables
+  with the equivalent of `""` would be skipped rather than their value used).
+- Return an error if the value in a given environment variable cannot be parsed
+  as the flag type. Previously these errors were silently swallowed.
+- Print full error when an invalid flag is specified (which includes the invalid flag)
+- `App.Writer` defaults to `stdout` when `nil`
+- If no action is specified on a command or app, the help is now printed instead of `panic`ing
+- `App.Metadata` is initialized automatically now (previously was `nil` unless initialized)
+- Correctly show help message if `-h` is provided to a subcommand
+- `context.(Global)IsSet` now respects environment variables. Previously it
+  would return `false` if a flag was specified in the environment rather than
+  as an argument
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+- `altsrc`s import paths were updated to use `gopkg.in/urfave/cli.v1`. This
+  fixes issues that occurred when `gopkg.in/urfave/cli.v1` was imported as well
+  as `altsrc` where Go would complain that the types didn't match
+
+## [1.18.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user (backported)
+
+## [1.18.0] - 2016-06-27
+### Added
+- `./runtests` test runner with coverage tracking by default
+- testing on OS X
+- testing on Windows
+- `UintFlag`, `Uint64Flag`, and `Int64Flag` types and supporting code
+
+### Changed
+- Use spaces for alignment in help/usage output instead of tabs, making the
+  output alignment consistent regardless of tab width
+
+### Fixed
+- Printing of command aliases in help text
+- Printing of visible flags for both struct and struct pointer flags
+- Display the `help` subcommand when using `CommandCategories`
+- No longer swallows `panic`s that occur within the `Action`s themselves when
+  detecting the signature of the `Action` field
+
+## [1.17.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+
+## [1.17.0] - 2016-05-09
+### Added
+- Pluggable flag-level help text rendering via `cli.DefaultFlagStringFunc`
+- `context.GlobalBoolT` was added as an analogue to `context.GlobalBool`
+- Support for hiding commands by setting `Hidden: true` -- this will hide the
+  commands in help output
+
+### Changed
+- `Float64Flag`, `IntFlag`, and `DurationFlag` default values are no longer
+  quoted in help text output.
+- All flag types now include `(default: {value})` strings following usage when a
+  default value can be (reasonably) detected.
+- `IntSliceFlag` and `StringSliceFlag` usage strings are now more consistent
+  with non-slice flag types
+- Apps now exit with a code of 3 if an unknown subcommand is specified
+  (previously they printed "No help topic for...", but still exited 0. This
+  makes it easier to script around apps built using `cli` since they can trust
+  that a 0 exit code indicated a successful execution.
+- cleanups based on [Go Report Card
+  feedback](https://goreportcard.com/report/github.com/urfave/cli)
+
+## [1.16.1] - 2016-08-28
+### Fixed
+- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
+
+## [1.16.0] - 2016-05-02
+### Added
+- `Hidden` field on all flag struct types to omit from generated help text
+
+### Changed
+- `BashCompletionFlag` (`--enable-bash-completion`) is now omitted from
+generated help text via the `Hidden` field
+
+### Fixed
+- handling of error values in `HandleAction` and `HandleExitCoder`
+
+## [1.15.0] - 2016-04-30
+### Added
+- This file!
+- Support for placeholders in flag usage strings
+- `App.Metadata` map for arbitrary data/state management
+- `Set` and `GlobalSet` methods on `*cli.Context` for altering values after
+parsing.
+- Support for nested lookup of dot-delimited keys in structures loaded from
+YAML.
+
+### Changed
+- The `App.Action` and `Command.Action` now prefer a return signature of
+`func(*cli.Context) error`, as defined by `cli.ActionFunc`.  If a non-nil
+`error` is returned, there may be two outcomes:
+    - If the error fulfills `cli.ExitCoder`, then `os.Exit` will be called
+    automatically
+    - Else the error is bubbled up and returned from `App.Run`
+- Specifying an `Action` with the legacy return signature of
+`func(*cli.Context)` will produce a deprecation message to stderr
+- Specifying an `Action` that is not a `func` type will produce a non-zero exit
+from `App.Run`
+- Specifying an `Action` func that has an invalid (input) signature will
+produce a non-zero exit from `App.Run`
+
+### Deprecated
+- <a name="deprecated-cli-app-runandexitonerror"></a>
+`cli.App.RunAndExitOnError`, which should now be done by returning an error
+that fulfills `cli.ExitCoder` to `cli.App.Run`.
+- <a name="deprecated-cli-app-action-signature"></a> the legacy signature for
+`cli.App.Action` of `func(*cli.Context)`, which should now have a return
+signature of `func(*cli.Context) error`, as defined by `cli.ActionFunc`.
+
+### Fixed
+- Added missing `*cli.Context.GlobalFloat64` method
+
+## [1.14.0] - 2016-04-03 (backfilled 2016-04-25)
+### Added
+- Codebeat badge
+- Support for categorization via `CategorizedHelp` and `Categories` on app.
+
+### Changed
+- Use `filepath.Base` instead of `path.Base` in `Name` and `HelpName`.
+
+### Fixed
+- Ensure version is not shown in help text when `HideVersion` set.
+
+## [1.13.0] - 2016-03-06 (backfilled 2016-04-25)
+### Added
+- YAML file input support.
+- `NArg` method on context.
+
+## [1.12.0] - 2016-02-17 (backfilled 2016-04-25)
+### Added
+- Custom usage error handling.
+- Custom text support in `USAGE` section of help output.
+- Improved help messages for empty strings.
+- AppVeyor CI configuration.
+
+### Changed
+- Removed `panic` from default help printer func.
+- De-duping and optimizations.
+
+### Fixed
+- Correctly handle `Before`/`After` at command level when no subcommands.
+- Case of literal `-` argument causing flag reordering.
+- Environment variable hints on Windows.
+- Docs updates.
+
+## [1.11.1] - 2015-12-21 (backfilled 2016-04-25)
+### Changed
+- Use `path.Base` in `Name` and `HelpName`
+- Export `GetName` on flag types.
+
+### Fixed
+- Flag parsing when skipping is enabled.
+- Test output cleanup.
+- Move completion check to account for empty input case.
+
+## [1.11.0] - 2015-11-15 (backfilled 2016-04-25)
+### Added
+- Destination scan support for flags.
+- Testing against `tip` in Travis CI config.
+
+### Changed
+- Go version in Travis CI config.
+
+### Fixed
+- Removed redundant tests.
+- Use correct example naming in tests.
+
+## [1.10.2] - 2015-10-29 (backfilled 2016-04-25)
+### Fixed
+- Remove unused var in bash completion.
+
+## [1.10.1] - 2015-10-21 (backfilled 2016-04-25)
+### Added
+- Coverage and reference logos in README.
+
+### Fixed
+- Use specified values in help and version parsing.
+- Only display app version and help message once.
+
+## [1.10.0] - 2015-10-06 (backfilled 2016-04-25)
+### Added
+- More tests for existing functionality.
+- `ArgsUsage` at app and command level for help text flexibility.
+
+### Fixed
+- Honor `HideHelp` and `HideVersion` in `App.Run`.
+- Remove juvenile word from README.
+
+## [1.9.0] - 2015-09-08 (backfilled 2016-04-25)
+### Added
+- `FullName` on command with accompanying help output update.
+- Set default `$PROG` in bash completion.
+
+### Changed
+- Docs formatting.
+
+### Fixed
+- Removed self-referential imports in tests.
+
+## [1.8.0] - 2015-06-30 (backfilled 2016-04-25)
+### Added
+- Support for `Copyright` at app level.
+- `Parent` func at context level to walk up context lineage.
+
+### Fixed
+- Global flag processing at top level.
+
+## [1.7.1] - 2015-06-11 (backfilled 2016-04-25)
+### Added
+- Aggregate errors from `Before`/`After` funcs.
+- Doc comments on flag structs.
+- Include non-global flags when checking version and help.
+- Travis CI config updates.
+
+### Fixed
+- Ensure slice type flags have non-nil values.
+- Collect global flags from the full command hierarchy.
+- Docs prose.
+
+## [1.7.0] - 2015-05-03 (backfilled 2016-04-25)
+### Changed
+- `HelpPrinter` signature includes output writer.
+
+### Fixed
+- Specify go 1.1+ in docs.
+- Set `Writer` when running command as app.
+
+## [1.6.0] - 2015-03-23 (backfilled 2016-04-25)
+### Added
+- Multiple author support.
+- `NumFlags` at context level.
+- `Aliases` at command level.
+
+### Deprecated
+- `ShortName` at command level.
+
+### Fixed
+- Subcommand help output.
+- Backward compatible support for deprecated `Author` and `Email` fields.
+- Docs regarding `Names`/`Aliases`.
+
+## [1.5.0] - 2015-02-20 (backfilled 2016-04-25)
+### Added
+- `After` hook func support at app and command level.
+
+### Fixed
+- Use parsed context when running command as subcommand.
+- Docs prose.
+
+## [1.4.1] - 2015-01-09 (backfilled 2016-04-25)
+### Added
+- Support for hiding `-h / --help` flags, but not `help` subcommand.
+- Stop flag parsing after `--`.
+
+### Fixed
+- Help text for generic flags to specify single value.
+- Use double quotes in output for defaults.
+- Use `ParseInt` instead of `ParseUint` for int environment var values.
+- Use `0` as base when parsing int environment var values.
+
+## [1.4.0] - 2014-12-12 (backfilled 2016-04-25)
+### Added
+- Support for environment variable lookup "cascade".
+- Support for `Stdout` on app for output redirection.
+
+### Fixed
+- Print command help instead of app help in `ShowCommandHelp`.
+
+## [1.3.1] - 2014-11-13 (backfilled 2016-04-25)
+### Added
+- Docs and example code updates.
+
+### Changed
+- Default `-v / --version` flag made optional.
+
+## [1.3.0] - 2014-08-10 (backfilled 2016-04-25)
+### Added
+- `FlagNames` at context level.
+- Exposed `VersionPrinter` var for more control over version output.
+- Zsh completion hook.
+- `AUTHOR` section in default app help template.
+- Contribution guidelines.
+- `DurationFlag` type.
+
+## [1.2.0] - 2014-08-02
+### Added
+- Support for environment variable defaults on flags plus tests.
+
+## [1.1.0] - 2014-07-15
+### Added
+- Bash completion.
+- Optional hiding of built-in help command.
+- Optional skipping of flag parsing at command level.
+- `Author`, `Email`, and `Compiled` metadata on app.
+- `Before` hook func support at app and command level.
+- `CommandNotFound` func support at app level.
+- Command reference available on context.
+- `GenericFlag` type.
+- `Float64Flag` type.
+- `BoolTFlag` type.
+- `IsSet` flag helper on context.
+- More flag lookup funcs at context level.
+- More tests &amp; docs.
+
+### Changed
+- Help template updates to account for presence/absence of flags.
+- Separated subcommand help template.
+- Exposed `HelpPrinter` var for more control over help output.
+
+## [1.0.0] - 2013-11-01
+### Added
+- `help` flag in default app flag set and each command flag set.
+- Custom handling of argument parsing errors.
+- Command lookup by name at app level.
+- `StringSliceFlag` type and supporting `StringSlice` type.
+- `IntSliceFlag` type and supporting `IntSlice` type.
+- Slice type flag lookups by name at context level.
+- Export of app and command help functions.
+- More tests &amp; docs.
+
+## 0.1.0 - 2013-07-22
+### Added
+- Initial implementation.
+
+[Unreleased]: https://github.com/urfave/cli/compare/v1.18.0...HEAD
+[1.18.0]: https://github.com/urfave/cli/compare/v1.17.0...v1.18.0
+[1.17.0]: https://github.com/urfave/cli/compare/v1.16.0...v1.17.0
+[1.16.0]: https://github.com/urfave/cli/compare/v1.15.0...v1.16.0
+[1.15.0]: https://github.com/urfave/cli/compare/v1.14.0...v1.15.0
+[1.14.0]: https://github.com/urfave/cli/compare/v1.13.0...v1.14.0
+[1.13.0]: https://github.com/urfave/cli/compare/v1.12.0...v1.13.0
+[1.12.0]: https://github.com/urfave/cli/compare/v1.11.1...v1.12.0
+[1.11.1]: https://github.com/urfave/cli/compare/v1.11.0...v1.11.1
+[1.11.0]: https://github.com/urfave/cli/compare/v1.10.2...v1.11.0
+[1.10.2]: https://github.com/urfave/cli/compare/v1.10.1...v1.10.2
+[1.10.1]: https://github.com/urfave/cli/compare/v1.10.0...v1.10.1
+[1.10.0]: https://github.com/urfave/cli/compare/v1.9.0...v1.10.0
+[1.9.0]: https://github.com/urfave/cli/compare/v1.8.0...v1.9.0
+[1.8.0]: https://github.com/urfave/cli/compare/v1.7.1...v1.8.0
+[1.7.1]: https://github.com/urfave/cli/compare/v1.7.0...v1.7.1
+[1.7.0]: https://github.com/urfave/cli/compare/v1.6.0...v1.7.0
+[1.6.0]: https://github.com/urfave/cli/compare/v1.5.0...v1.6.0
+[1.5.0]: https://github.com/urfave/cli/compare/v1.4.1...v1.5.0
+[1.4.1]: https://github.com/urfave/cli/compare/v1.4.0...v1.4.1
+[1.4.0]: https://github.com/urfave/cli/compare/v1.3.1...v1.4.0
+[1.3.1]: https://github.com/urfave/cli/compare/v1.3.0...v1.3.1
+[1.3.0]: https://github.com/urfave/cli/compare/v1.2.0...v1.3.0
+[1.2.0]: https://github.com/urfave/cli/compare/v1.1.0...v1.2.0
+[1.1.0]: https://github.com/urfave/cli/compare/v1.0.0...v1.1.0
+[1.0.0]: https://github.com/urfave/cli/compare/v0.1.0...v1.0.0
diff --git a/vendor/github.com/urfave/cli/LICENSE b/vendor/github.com/urfave/cli/LICENSE
new file mode 100644
index 00000000..42a597e2
--- /dev/null
+++ b/vendor/github.com/urfave/cli/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Jeremy Saenz & Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vendor/github.com/urfave/cli/README.md b/vendor/github.com/urfave/cli/README.md
new file mode 100644
index 00000000..2bbbd8ea
--- /dev/null
+++ b/vendor/github.com/urfave/cli/README.md
@@ -0,0 +1,1381 @@
+cli
+===
+
+[![Build Status](https://travis-ci.org/urfave/cli.svg?branch=master)](https://travis-ci.org/urfave/cli)
+[![Windows Build Status](https://ci.appveyor.com/api/projects/status/rtgk5xufi932pb2v?svg=true)](https://ci.appveyor.com/project/urfave/cli)
+[![GoDoc](https://godoc.org/github.com/urfave/cli?status.svg)](https://godoc.org/github.com/urfave/cli)
+[![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-urfave-cli)
+[![Go Report Card](https://goreportcard.com/badge/urfave/cli)](https://goreportcard.com/report/urfave/cli)
+[![top level coverage](https://gocover.io/_badge/github.com/urfave/cli?0 "top level coverage")](http://gocover.io/github.com/urfave/cli) /
+[![altsrc coverage](https://gocover.io/_badge/github.com/urfave/cli/altsrc?0 "altsrc coverage")](http://gocover.io/github.com/urfave/cli/altsrc)
+
+**Notice:** This is the library formerly known as
+`github.com/codegangsta/cli` -- Github will automatically redirect requests
+to this repository, but we recommend updating your references for clarity.
+
+cli is a simple, fast, and fun package for building command line apps in Go. The
+goal is to enable developers to write fast and distributable command line
+applications in an expressive way.
+
+<!-- toc -->
+
+- [Overview](#overview)
+- [Installation](#installation)
+  * [Supported platforms](#supported-platforms)
+  * [Using the `v2` branch](#using-the-v2-branch)
+  * [Pinning to the `v1` releases](#pinning-to-the-v1-releases)
+- [Getting Started](#getting-started)
+- [Examples](#examples)
+  * [Arguments](#arguments)
+  * [Flags](#flags)
+    + [Placeholder Values](#placeholder-values)
+    + [Alternate Names](#alternate-names)
+    + [Ordering](#ordering)
+    + [Values from the Environment](#values-from-the-environment)
+    + [Values from alternate input sources (YAML, TOML, and others)](#values-from-alternate-input-sources-yaml-toml-and-others)
+  * [Subcommands](#subcommands)
+  * [Subcommands categories](#subcommands-categories)
+  * [Exit code](#exit-code)
+  * [Bash Completion](#bash-completion)
+    + [Enabling](#enabling)
+    + [Distribution](#distribution)
+    + [Customization](#customization)
+  * [Generated Help Text](#generated-help-text)
+    + [Customization](#customization-1)
+  * [Version Flag](#version-flag)
+    + [Customization](#customization-2)
+    + [Full API Example](#full-api-example)
+- [Contribution Guidelines](#contribution-guidelines)
+
+<!-- tocstop -->
+
+## Overview
+
+Command line apps are usually so tiny that there is absolutely no reason why
+your code should *not* be self-documenting. Things like generating help text and
+parsing command flags/options should not hinder productivity when writing a
+command line app.
+
+**This is where cli comes into play.** cli makes command line programming fun,
+organized, and expressive!
+
+## Installation
+
+Make sure you have a working Go environment.  Go version 1.2+ is supported.  [See
+the install instructions for Go](http://golang.org/doc/install.html).
+
+To install cli, simply run:
+```
+$ go get github.com/urfave/cli
+```
+
+Make sure your `PATH` includes the `$GOPATH/bin` directory so your commands can
+be easily used:
+```
+export PATH=$PATH:$GOPATH/bin
+```
+
+### Supported platforms
+
+cli is tested against multiple versions of Go on Linux, and against the latest
+released version of Go on OS X and Windows.  For full details, see
+[`./.travis.yml`](./.travis.yml) and [`./appveyor.yml`](./appveyor.yml).
+
+### Using the `v2` branch
+
+**Warning**: The `v2` branch is currently unreleased and considered unstable.
+
+There is currently a long-lived branch named `v2` that is intended to land as
+the new `master` branch once development there has settled down.  The current
+`master` branch (mirrored as `v1`) is being manually merged into `v2` on
+an irregular human-based schedule, but generally if one wants to "upgrade" to
+`v2` *now* and accept the volatility (read: "awesomeness") that comes along with
+that, please use whatever version pinning of your preference, such as via
+`gopkg.in`:
+
+```
+$ go get gopkg.in/urfave/cli.v2
+```
+
+``` go
+...
+import (
+  "gopkg.in/urfave/cli.v2" // imports as package "cli"
+)
+...
+```
+
+### Pinning to the `v1` releases
+
+Similarly to the section above describing use of the `v2` branch, if one wants
+to avoid any unexpected compatibility pains once `v2` becomes `master`, then
+pinning to `v1` is an acceptable option, e.g.:
+
+```
+$ go get gopkg.in/urfave/cli.v1
+```
+
+``` go
+...
+import (
+  "gopkg.in/urfave/cli.v1" // imports as package "cli"
+)
+...
+```
+
+This will pull the latest tagged `v1` release (e.g. `v1.18.1` at the time of writing).
+
+## Getting Started
+
+One of the philosophies behind cli is that an API should be playful and full of
+discovery. So a cli app can be as little as one line of code in `main()`.
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "A new cli application"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.NewApp().Run(os.Args)
+}
+```
+
+This app will run and show help text, but is not very useful. Let's give an
+action to execute and some help documentation:
+
+<!-- {
+  "output": "boom! I say!"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "boom"
+  app.Usage = "make an explosive entrance"
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("boom! I say!")
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+Running this already gives you a ton of functionality, plus support for things
+like subcommands and flags, which are covered below.
+
+## Examples
+
+Being a programmer can be a lonely job. Thankfully by the power of automation
+that is not the case! Let's create a greeter app to fend off our demons of
+loneliness!
+
+Start by creating a directory named `greet`, and within it, add a file,
+`greet.go` with the following code in it:
+
+<!-- {
+  "output": "Hello friend!"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "greet"
+  app.Usage = "fight the loneliness!"
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("Hello friend!")
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+Install our command to the `$GOPATH/bin` directory:
+
+```
+$ go install
+```
+
+Finally run our new command:
+
+```
+$ greet
+Hello friend!
+```
+
+cli also generates neat help text:
+
+```
+$ greet help
+NAME:
+    greet - fight the loneliness!
+
+USAGE:
+    greet [global options] command [command options] [arguments...]
+
+VERSION:
+    0.0.0
+
+COMMANDS:
+    help, h  Shows a list of commands or help for one command
+
+GLOBAL OPTIONS
+    --version Shows version information
+```
+
+### Arguments
+
+You can lookup arguments by calling the `Args` function on `cli.Context`, e.g.:
+
+<!-- {
+  "output": "Hello \""
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Action = func(c *cli.Context) error {
+    fmt.Printf("Hello %q", c.Args().Get(0))
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+### Flags
+
+Setting and querying flags is simple.
+
+<!-- {
+  "output": "Hello Nefertiti"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang",
+      Value: "english",
+      Usage: "language for the greeting",
+    },
+  }
+
+  app.Action = func(c *cli.Context) error {
+    name := "Nefertiti"
+    if c.NArg() > 0 {
+      name = c.Args().Get(0)
+    }
+    if c.String("lang") == "spanish" {
+      fmt.Println("Hola", name)
+    } else {
+      fmt.Println("Hello", name)
+    }
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+You can also set a destination variable for a flag, to which the content will be
+scanned.
+
+<!-- {
+  "output": "Hello someone"
+} -->
+``` go
+package main
+
+import (
+  "os"
+  "fmt"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  var language string
+
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name:        "lang",
+      Value:       "english",
+      Usage:       "language for the greeting",
+      Destination: &language,
+    },
+  }
+
+  app.Action = func(c *cli.Context) error {
+    name := "someone"
+    if c.NArg() > 0 {
+      name = c.Args()[0]
+    }
+    if language == "spanish" {
+      fmt.Println("Hola", name)
+    } else {
+      fmt.Println("Hello", name)
+    }
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+See full list of flags at http://godoc.org/github.com/urfave/cli
+
+#### Placeholder Values
+
+Sometimes it's useful to specify a flag's value within the usage string itself.
+Such placeholders are indicated with back quotes.
+
+For example this:
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "&#45;&#45;config FILE, &#45;c FILE"
+} -->
+```go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag{
+    cli.StringFlag{
+      Name:  "config, c",
+      Usage: "Load configuration from `FILE`",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+Will result in help output like:
+
+```
+--config FILE, -c FILE   Load configuration from FILE
+```
+
+Note that only the first placeholder is used. Subsequent back-quoted words will
+be left as-is.
+
+#### Alternate Names
+
+You can set alternate (or short) names for flags by providing a comma-delimited
+list for the `Name`. e.g.
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "&#45;&#45;lang value, &#45;l value.*language for the greeting.*default: \"english\""
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+That flag can then be set with `--lang spanish` or `-l spanish`. Note that
+giving two different forms of the same flag in the same command invocation is an
+error.
+
+#### Ordering
+
+Flags for the application and commands are shown in the order they are defined.
+However, it's possible to sort them from outside this library by using `FlagsByName`
+or `CommandsByName` with `sort`.
+
+For example this:
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "add a task to the list\n.*complete a task on the list\n.*\n\n.*\n.*Load configuration from FILE\n.*Language for the greeting.*"
+} -->
+``` go
+package main
+
+import (
+  "os"
+  "sort"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "Language for the greeting",
+    },
+    cli.StringFlag{
+      Name: "config, c",
+      Usage: "Load configuration from `FILE`",
+    },
+  }
+
+  app.Commands = []cli.Command{
+    {
+      Name:    "complete",
+      Aliases: []string{"c"},
+      Usage:   "complete a task on the list",
+      Action:  func(c *cli.Context) error {
+        return nil
+      },
+    },
+    {
+      Name:    "add",
+      Aliases: []string{"a"},
+      Usage:   "add a task to the list",
+      Action:  func(c *cli.Context) error {
+        return nil
+      },
+    },
+  }
+
+  sort.Sort(cli.FlagsByName(app.Flags))
+  sort.Sort(cli.CommandsByName(app.Commands))
+
+  app.Run(os.Args)
+}
+```
+
+Will result in help output like:
+
+```
+--config FILE, -c FILE  Load configuration from FILE
+--lang value, -l value  Language for the greeting (default: "english")
+```
+
+#### Values from the Environment
+
+You can also have the default value set from the environment via `EnvVar`.  e.g.
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "language for the greeting.*APP_LANG"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+      EnvVar: "APP_LANG",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+The `EnvVar` may also be given as a comma-delimited "cascade", where the first
+environment variable that resolves is used as the default.
+
+<!-- {
+  "args": ["&#45;&#45;help"],
+  "output": "language for the greeting.*LEGACY_COMPAT_LANG.*APP_LANG.*LANG"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Flags = []cli.Flag {
+    cli.StringFlag{
+      Name: "lang, l",
+      Value: "english",
+      Usage: "language for the greeting",
+      EnvVar: "LEGACY_COMPAT_LANG,APP_LANG,LANG",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+#### Values from alternate input sources (YAML, TOML, and others)
+
+There is a separate package altsrc that adds support for getting flag values
+from other file input sources.
+
+Currently supported input source formats:
+* YAML
+* TOML
+
+In order to get values for a flag from an alternate input source the following
+code would be added to wrap an existing cli.Flag like below:
+
+``` go
+  altsrc.NewIntFlag(cli.IntFlag{Name: "test"})
+```
+
+Initialization must also occur for these flags. Below is an example initializing
+getting data from a yaml file below.
+
+``` go
+  command.Before = altsrc.InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+```
+
+The code above will use the "load" string as a flag name to get the file name of
+a yaml file from the cli.Context.  It will then use that file name to initialize
+the yaml input source for any flags that are defined on that command.  As a note
+the "load" flag used would also have to be defined on the command flags in order
+for this code snipped to work.
+
+Currently only the aboved specified formats are supported but developers can
+add support for other input sources by implementing the
+altsrc.InputSourceContext for their given sources.
+
+Here is a more complete sample of a command using YAML support:
+
+<!-- {
+  "args": ["test-cmd", "&#45;&#45;help"],
+  "output": "&#45&#45;test value.*default: 0"
+} -->
+``` go
+package notmain
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+  "github.com/urfave/cli/altsrc"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  flags := []cli.Flag{
+    altsrc.NewIntFlag(cli.IntFlag{Name: "test"}),
+    cli.StringFlag{Name: "load"},
+  }
+
+  app.Action = func(c *cli.Context) error {
+    fmt.Println("yaml ist rad")
+    return nil
+  }
+
+  app.Before = altsrc.InitInputSourceWithContext(flags, altsrc.NewYamlSourceFromFlagFunc("load"))
+  app.Flags = flags
+
+  app.Run(os.Args)
+}
+```
+
+### Subcommands
+
+Subcommands can be defined for a more git-like command line app.
+
+<!-- {
+  "args": ["template", "add"],
+  "output": "new task template: .+"
+} -->
+```go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Commands = []cli.Command{
+    {
+      Name:    "add",
+      Aliases: []string{"a"},
+      Usage:   "add a task to the list",
+      Action:  func(c *cli.Context) error {
+        fmt.Println("added task: ", c.Args().First())
+        return nil
+      },
+    },
+    {
+      Name:    "complete",
+      Aliases: []string{"c"},
+      Usage:   "complete a task on the list",
+      Action:  func(c *cli.Context) error {
+        fmt.Println("completed task: ", c.Args().First())
+        return nil
+      },
+    },
+    {
+      Name:        "template",
+      Aliases:     []string{"t"},
+      Usage:       "options for task templates",
+      Subcommands: []cli.Command{
+        {
+          Name:  "add",
+          Usage: "add a new template",
+          Action: func(c *cli.Context) error {
+            fmt.Println("new task template: ", c.Args().First())
+            return nil
+          },
+        },
+        {
+          Name:  "remove",
+          Usage: "remove an existing template",
+          Action: func(c *cli.Context) error {
+            fmt.Println("removed task template: ", c.Args().First())
+            return nil
+          },
+        },
+      },
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+### Subcommands categories
+
+For additional organization in apps that have many subcommands, you can
+associate a category for each command to group them together in the help
+output.
+
+E.g.
+
+```go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+
+  app.Commands = []cli.Command{
+    {
+      Name: "noop",
+    },
+    {
+      Name:     "add",
+      Category: "template",
+    },
+    {
+      Name:     "remove",
+      Category: "template",
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+Will include:
+
+```
+COMMANDS:
+    noop
+
+  Template actions:
+    add
+    remove
+```
+
+### Exit code
+
+Calling `App.Run` will not automatically call `os.Exit`, which means that by
+default the exit code will "fall through" to being `0`.  An explicit exit code
+may be set by returning a non-nil error that fulfills `cli.ExitCoder`, *or* a
+`cli.MultiError` that includes an error that fulfills `cli.ExitCoder`, e.g.:
+
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Flags = []cli.Flag{
+    cli.BoolTFlag{
+      Name:  "ginger-crouton",
+      Usage: "is it in the soup?",
+    },
+  }
+  app.Action = func(ctx *cli.Context) error {
+    if !ctx.Bool("ginger-crouton") {
+      return cli.NewExitError("it is not in the soup", 86)
+    }
+    return nil
+  }
+
+  app.Run(os.Args)
+}
+```
+
+### Bash Completion
+
+You can enable completion commands by setting the `EnableBashCompletion`
+flag on the `App` object.  By default, this setting will only auto-complete to
+show an app's subcommands, but you can write your own completion methods for
+the App or its subcommands.
+
+<!-- {
+  "args": ["complete", "&#45;&#45;generate&#45;bash&#45;completion"],
+  "output": "laundry"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  tasks := []string{"cook", "clean", "laundry", "eat", "sleep", "code"}
+
+  app := cli.NewApp()
+  app.EnableBashCompletion = true
+  app.Commands = []cli.Command{
+    {
+      Name:  "complete",
+      Aliases: []string{"c"},
+      Usage: "complete a task on the list",
+      Action: func(c *cli.Context) error {
+         fmt.Println("completed task: ", c.Args().First())
+         return nil
+      },
+      BashComplete: func(c *cli.Context) {
+        // This will complete if no args are passed
+        if c.NArg() > 0 {
+          return
+        }
+        for _, t := range tasks {
+          fmt.Println(t)
+        }
+      },
+    },
+  }
+
+  app.Run(os.Args)
+}
+```
+
+#### Enabling
+
+Source the `autocomplete/bash_autocomplete` file in your `.bashrc` file while
+setting the `PROG` variable to the name of your program:
+
+`PROG=myprogram source /.../cli/autocomplete/bash_autocomplete`
+
+#### Distribution
+
+Copy `autocomplete/bash_autocomplete` into `/etc/bash_completion.d/` and rename
+it to the name of the program you wish to add autocomplete support for (or
+automatically install it there if you are distributing a package). Don't forget
+to source the file to make it active in the current shell.
+
+```
+sudo cp src/bash_autocomplete /etc/bash_completion.d/<myprogram>
+source /etc/bash_completion.d/<myprogram>
+```
+
+Alternatively, you can just document that users should source the generic
+`autocomplete/bash_autocomplete` in their bash configuration with `$PROG` set
+to the name of their program (as above).
+
+#### Customization
+
+The default bash completion flag (`--generate-bash-completion`) is defined as
+`cli.BashCompletionFlag`, and may be redefined if desired, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45;compgen"],
+  "output": "wat\nhelp\nh"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.BashCompletionFlag = cli.BoolFlag{
+    Name:   "compgen",
+    Hidden: true,
+  }
+
+  app := cli.NewApp()
+  app.EnableBashCompletion = true
+  app.Commands = []cli.Command{
+    {
+      Name: "wat",
+    },
+  }
+  app.Run(os.Args)
+}
+```
+
+### Generated Help Text
+
+The default help flag (`-h/--help`) is defined as `cli.HelpFlag` and is checked
+by the cli internals in order to print generated help text for the app, command,
+or subcommand, and break execution.
+
+#### Customization
+
+All of the help text generation may be customized, and at multiple levels.  The
+templates are exposed as variables `AppHelpTemplate`, `CommandHelpTemplate`, and
+`SubcommandHelpTemplate` which may be reassigned or augmented, and full override
+is possible by assigning a compatible func to the `cli.HelpPrinter` variable,
+e.g.:
+
+<!-- {
+  "output": "Ha HA.  I pwnd the help!!1"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "io"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  // EXAMPLE: Append to an existing template
+  cli.AppHelpTemplate = fmt.Sprintf(`%s
+
+WEBSITE: http://awesometown.example.com
+
+SUPPORT: support@awesometown.example.com
+
+`, cli.AppHelpTemplate)
+
+  // EXAMPLE: Override a template
+  cli.AppHelpTemplate = `NAME:
+   {{.Name}} - {{.Usage}}
+USAGE:
+   {{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
+   {{if len .Authors}}
+AUTHOR:
+   {{range .Authors}}{{ . }}{{end}}
+   {{end}}{{if .Commands}}
+COMMANDS:
+{{range .Commands}}{{if not .HideHelp}}   {{join .Names ", "}}{{ "\t"}}{{.Usage}}{{ "\n" }}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}{{if .Copyright }}
+COPYRIGHT:
+   {{.Copyright}}
+   {{end}}{{if .Version}}
+VERSION:
+   {{.Version}}
+   {{end}}
+`
+
+  // EXAMPLE: Replace the `HelpPrinter` func
+  cli.HelpPrinter = func(w io.Writer, templ string, data interface{}) {
+    fmt.Println("Ha HA.  I pwnd the help!!1")
+  }
+
+  cli.NewApp().Run(os.Args)
+}
+```
+
+The default flag may be customized to something other than `-h/--help` by
+setting `cli.HelpFlag`, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45halp"],
+  "output": "haaaaalp.*HALP"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.HelpFlag = cli.BoolFlag{
+    Name: "halp, haaaaalp",
+    Usage: "HALP",
+    EnvVar: "SHOW_HALP,HALPPLZ",
+  }
+
+  cli.NewApp().Run(os.Args)
+}
+```
+
+### Version Flag
+
+The default version flag (`-v/--version`) is defined as `cli.VersionFlag`, which
+is checked by the cli internals in order to print the `App.Version` via
+`cli.VersionPrinter` and break execution.
+
+#### Customization
+
+The default flag may be customized to something other than `-v/--version` by
+setting `cli.VersionFlag`, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45print-version"],
+  "output": "partay version 19\\.99\\.0"
+} -->
+``` go
+package main
+
+import (
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+func main() {
+  cli.VersionFlag = cli.BoolFlag{
+    Name: "print-version, V",
+    Usage: "print only the version",
+  }
+
+  app := cli.NewApp()
+  app.Name = "partay"
+  app.Version = "19.99.0"
+  app.Run(os.Args)
+}
+```
+
+Alternatively, the version printer at `cli.VersionPrinter` may be overridden, e.g.:
+
+<!-- {
+  "args": ["&#45;&#45version"],
+  "output": "version=19\\.99\\.0 revision=fafafaf"
+} -->
+``` go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "github.com/urfave/cli"
+)
+
+var (
+  Revision = "fafafaf"
+)
+
+func main() {
+  cli.VersionPrinter = func(c *cli.Context) {
+    fmt.Printf("version=%s revision=%s\n", c.App.Version, Revision)
+  }
+
+  app := cli.NewApp()
+  app.Name = "partay"
+  app.Version = "19.99.0"
+  app.Run(os.Args)
+}
+```
+
+#### Full API Example
+
+**Notice**: This is a contrived (functioning) example meant strictly for API
+demonstration purposes.  Use of one's imagination is encouraged.
+
+<!-- {
+  "output": "made it!\nPhew!"
+} -->
+``` go
+package main
+
+import (
+  "errors"
+  "flag"
+  "fmt"
+  "io"
+  "io/ioutil"
+  "os"
+  "time"
+
+  "github.com/urfave/cli"
+)
+
+func init() {
+  cli.AppHelpTemplate += "\nCUSTOMIZED: you bet ur muffins\n"
+  cli.CommandHelpTemplate += "\nYMMV\n"
+  cli.SubcommandHelpTemplate += "\nor something\n"
+
+  cli.HelpFlag = cli.BoolFlag{Name: "halp"}
+  cli.BashCompletionFlag = cli.BoolFlag{Name: "compgen", Hidden: true}
+  cli.VersionFlag = cli.BoolFlag{Name: "print-version, V"}
+
+  cli.HelpPrinter = func(w io.Writer, templ string, data interface{}) {
+    fmt.Fprintf(w, "best of luck to you\n")
+  }
+  cli.VersionPrinter = func(c *cli.Context) {
+    fmt.Fprintf(c.App.Writer, "version=%s\n", c.App.Version)
+  }
+  cli.OsExiter = func(c int) {
+    fmt.Fprintf(cli.ErrWriter, "refusing to exit %d\n", c)
+  }
+  cli.ErrWriter = ioutil.Discard
+  cli.FlagStringer = func(fl cli.Flag) string {
+    return fmt.Sprintf("\t\t%s", fl.GetName())
+  }
+}
+
+type hexWriter struct{}
+
+func (w *hexWriter) Write(p []byte) (int, error) {
+  for _, b := range p {
+    fmt.Printf("%x", b)
+  }
+  fmt.Printf("\n")
+
+  return len(p), nil
+}
+
+type genericType struct{
+  s string
+}
+
+func (g *genericType) Set(value string) error {
+  g.s = value
+  return nil
+}
+
+func (g *genericType) String() string {
+  return g.s
+}
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "kənˈtrīv"
+  app.Version = "19.99.0"
+  app.Compiled = time.Now()
+  app.Authors = []cli.Author{
+    cli.Author{
+      Name:  "Example Human",
+      Email: "human@example.com",
+    },
+  }
+  app.Copyright = "(c) 1999 Serious Enterprise"
+  app.HelpName = "contrive"
+  app.Usage = "demonstrate available API"
+  app.UsageText = "contrive - demonstrating the available API"
+  app.ArgsUsage = "[args and such]"
+  app.Commands = []cli.Command{
+    cli.Command{
+      Name:        "doo",
+      Aliases:     []string{"do"},
+      Category:    "motion",
+      Usage:       "do the doo",
+      UsageText:   "doo - does the dooing",
+      Description: "no really, there is a lot of dooing to be done",
+      ArgsUsage:   "[arrgh]",
+      Flags: []cli.Flag{
+        cli.BoolFlag{Name: "forever, forevvarr"},
+      },
+      Subcommands: cli.Commands{
+        cli.Command{
+          Name:   "wop",
+          Action: wopAction,
+        },
+      },
+      SkipFlagParsing: false,
+      HideHelp:        false,
+      Hidden:          false,
+      HelpName:        "doo!",
+      BashComplete: func(c *cli.Context) {
+        fmt.Fprintf(c.App.Writer, "--better\n")
+      },
+      Before: func(c *cli.Context) error {
+        fmt.Fprintf(c.App.Writer, "brace for impact\n")
+        return nil
+      },
+      After: func(c *cli.Context) error {
+        fmt.Fprintf(c.App.Writer, "did we lose anyone?\n")
+        return nil
+      },
+      Action: func(c *cli.Context) error {
+        c.Command.FullName()
+        c.Command.HasName("wop")
+        c.Command.Names()
+        c.Command.VisibleFlags()
+        fmt.Fprintf(c.App.Writer, "dodododododoodododddooooododododooo\n")
+        if c.Bool("forever") {
+          c.Command.Run(c)
+        }
+        return nil
+      },
+      OnUsageError: func(c *cli.Context, err error, isSubcommand bool) error {
+        fmt.Fprintf(c.App.Writer, "for shame\n")
+        return err
+      },
+    },
+  }
+  app.Flags = []cli.Flag{
+    cli.BoolFlag{Name: "fancy"},
+    cli.BoolTFlag{Name: "fancier"},
+    cli.DurationFlag{Name: "howlong, H", Value: time.Second * 3},
+    cli.Float64Flag{Name: "howmuch"},
+    cli.GenericFlag{Name: "wat", Value: &genericType{}},
+    cli.Int64Flag{Name: "longdistance"},
+    cli.Int64SliceFlag{Name: "intervals"},
+    cli.IntFlag{Name: "distance"},
+    cli.IntSliceFlag{Name: "times"},
+    cli.StringFlag{Name: "dance-move, d"},
+    cli.StringSliceFlag{Name: "names, N"},
+    cli.UintFlag{Name: "age"},
+    cli.Uint64Flag{Name: "bigage"},
+  }
+  app.EnableBashCompletion = true
+  app.HideHelp = false
+  app.HideVersion = false
+  app.BashComplete = func(c *cli.Context) {
+    fmt.Fprintf(c.App.Writer, "lipstick\nkiss\nme\nlipstick\nringo\n")
+  }
+  app.Before = func(c *cli.Context) error {
+    fmt.Fprintf(c.App.Writer, "HEEEERE GOES\n")
+    return nil
+  }
+  app.After = func(c *cli.Context) error {
+    fmt.Fprintf(c.App.Writer, "Phew!\n")
+    return nil
+  }
+  app.CommandNotFound = func(c *cli.Context, command string) {
+    fmt.Fprintf(c.App.Writer, "Thar be no %q here.\n", command)
+  }
+  app.OnUsageError = func(c *cli.Context, err error, isSubcommand bool) error {
+    if isSubcommand {
+      return err
+    }
+
+    fmt.Fprintf(c.App.Writer, "WRONG: %#v\n", err)
+    return nil
+  }
+  app.Action = func(c *cli.Context) error {
+    cli.DefaultAppComplete(c)
+    cli.HandleExitCoder(errors.New("not an exit coder, though"))
+    cli.ShowAppHelp(c)
+    cli.ShowCommandCompletions(c, "nope")
+    cli.ShowCommandHelp(c, "also-nope")
+    cli.ShowCompletions(c)
+    cli.ShowSubcommandHelp(c)
+    cli.ShowVersion(c)
+
+    categories := c.App.Categories()
+    categories.AddCommand("sounds", cli.Command{
+      Name: "bloop",
+    })
+
+    for _, category := range c.App.Categories() {
+      fmt.Fprintf(c.App.Writer, "%s\n", category.Name)
+      fmt.Fprintf(c.App.Writer, "%#v\n", category.Commands)
+      fmt.Fprintf(c.App.Writer, "%#v\n", category.VisibleCommands())
+    }
+
+    fmt.Printf("%#v\n", c.App.Command("doo"))
+    if c.Bool("infinite") {
+      c.App.Run([]string{"app", "doo", "wop"})
+    }
+
+    if c.Bool("forevar") {
+      c.App.RunAsSubcommand(c)
+    }
+    c.App.Setup()
+    fmt.Printf("%#v\n", c.App.VisibleCategories())
+    fmt.Printf("%#v\n", c.App.VisibleCommands())
+    fmt.Printf("%#v\n", c.App.VisibleFlags())
+
+    fmt.Printf("%#v\n", c.Args().First())
+    if len(c.Args()) > 0 {
+      fmt.Printf("%#v\n", c.Args()[1])
+    }
+    fmt.Printf("%#v\n", c.Args().Present())
+    fmt.Printf("%#v\n", c.Args().Tail())
+
+    set := flag.NewFlagSet("contrive", 0)
+    nc := cli.NewContext(c.App, set, c)
+
+    fmt.Printf("%#v\n", nc.Args())
+    fmt.Printf("%#v\n", nc.Bool("nope"))
+    fmt.Printf("%#v\n", nc.BoolT("nerp"))
+    fmt.Printf("%#v\n", nc.Duration("howlong"))
+    fmt.Printf("%#v\n", nc.Float64("hay"))
+    fmt.Printf("%#v\n", nc.Generic("bloop"))
+    fmt.Printf("%#v\n", nc.Int64("bonk"))
+    fmt.Printf("%#v\n", nc.Int64Slice("burnks"))
+    fmt.Printf("%#v\n", nc.Int("bips"))
+    fmt.Printf("%#v\n", nc.IntSlice("blups"))
+    fmt.Printf("%#v\n", nc.String("snurt"))
+    fmt.Printf("%#v\n", nc.StringSlice("snurkles"))
+    fmt.Printf("%#v\n", nc.Uint("flub"))
+    fmt.Printf("%#v\n", nc.Uint64("florb"))
+    fmt.Printf("%#v\n", nc.GlobalBool("global-nope"))
+    fmt.Printf("%#v\n", nc.GlobalBoolT("global-nerp"))
+    fmt.Printf("%#v\n", nc.GlobalDuration("global-howlong"))
+    fmt.Printf("%#v\n", nc.GlobalFloat64("global-hay"))
+    fmt.Printf("%#v\n", nc.GlobalGeneric("global-bloop"))
+    fmt.Printf("%#v\n", nc.GlobalInt("global-bips"))
+    fmt.Printf("%#v\n", nc.GlobalIntSlice("global-blups"))
+    fmt.Printf("%#v\n", nc.GlobalString("global-snurt"))
+    fmt.Printf("%#v\n", nc.GlobalStringSlice("global-snurkles"))
+
+    fmt.Printf("%#v\n", nc.FlagNames())
+    fmt.Printf("%#v\n", nc.GlobalFlagNames())
+    fmt.Printf("%#v\n", nc.GlobalIsSet("wat"))
+    fmt.Printf("%#v\n", nc.GlobalSet("wat", "nope"))
+    fmt.Printf("%#v\n", nc.NArg())
+    fmt.Printf("%#v\n", nc.NumFlags())
+    fmt.Printf("%#v\n", nc.Parent())
+
+    nc.Set("wat", "also-nope")
+
+    ec := cli.NewExitError("ohwell", 86)
+    fmt.Fprintf(c.App.Writer, "%d", ec.ExitCode())
+    fmt.Printf("made it!\n")
+    return ec
+  }
+
+  if os.Getenv("HEXY") != "" {
+    app.Writer = &hexWriter{}
+    app.ErrWriter = &hexWriter{}
+  }
+
+  app.Metadata = map[string]interface{}{
+    "layers":     "many",
+    "explicable": false,
+    "whatever-values": 19.99,
+  }
+
+  app.Run(os.Args)
+}
+
+func wopAction(c *cli.Context) error {
+  fmt.Fprintf(c.App.Writer, ":wave: over here, eh\n")
+  return nil
+}
+```
+
+## Contribution Guidelines
+
+Feel free to put up a pull request to fix a bug or maybe add a feature. I will
+give it a code review and make sure that it does not break backwards
+compatibility. If I or any other collaborators agree that it is in line with
+the vision of the project, we will work with you to get the code into
+a mergeable state and merge it into the master branch.
+
+If you have contributed something significant to the project, we will most
+likely add you as a collaborator. As a collaborator you are given the ability
+to merge others pull requests. It is very important that new code does not
+break existing code, so be careful about what code you do choose to merge.
+
+If you feel like you have contributed to the project but have not yet been
+added as a collaborator, we probably forgot to add you, please open an issue.
diff --git a/vendor/github.com/urfave/cli/app.go b/vendor/github.com/urfave/cli/app.go
new file mode 100644
index 00000000..51fc45d8
--- /dev/null
+++ b/vendor/github.com/urfave/cli/app.go
@@ -0,0 +1,497 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sort"
+	"time"
+)
+
+var (
+	changeLogURL                    = "https://github.com/urfave/cli/blob/master/CHANGELOG.md"
+	appActionDeprecationURL         = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
+	runAndExitOnErrorDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-runandexitonerror", changeLogURL)
+
+	contactSysadmin = "This is an error in the application.  Please contact the distributor of this application if this is not you."
+
+	errInvalidActionType = NewExitError("ERROR invalid Action type. "+
+		fmt.Sprintf("Must be `func(*Context`)` or `func(*Context) error).  %s", contactSysadmin)+
+		fmt.Sprintf("See %s", appActionDeprecationURL), 2)
+)
+
+// App is the main structure of a cli application. It is recommended that
+// an app be created with the cli.NewApp() function
+type App struct {
+	// The name of the program. Defaults to path.Base(os.Args[0])
+	Name string
+	// Full name of command for help, defaults to Name
+	HelpName string
+	// Description of the program.
+	Usage string
+	// Text to override the USAGE section of help
+	UsageText string
+	// Description of the program argument format.
+	ArgsUsage string
+	// Version of the program
+	Version string
+	// Description of the program
+	Description string
+	// List of commands to execute
+	Commands []Command
+	// List of flags to parse
+	Flags []Flag
+	// Boolean to enable bash completion commands
+	EnableBashCompletion bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+	// Boolean to hide built-in version flag and the VERSION section of help
+	HideVersion bool
+	// Populate on app startup, only gettable through method Categories()
+	categories CommandCategories
+	// An action to execute when the bash-completion flag is set
+	BashComplete BashCompleteFunc
+	// An action to execute before any subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no subcommands are run
+	Before BeforeFunc
+	// An action to execute after any subcommands are run, but after the subcommand has finished
+	// It is run even if Action() panics
+	After AfterFunc
+
+	// The action to execute when no subcommands are specified
+	// Expects a `cli.ActionFunc` but will accept the *deprecated* signature of `func(*cli.Context) {}`
+	// *Note*: support for the deprecated `Action` signature will be removed in a future version
+	Action interface{}
+
+	// Execute this function if the proper command cannot be found
+	CommandNotFound CommandNotFoundFunc
+	// Execute this function if an usage error occurs
+	OnUsageError OnUsageErrorFunc
+	// Compilation date
+	Compiled time.Time
+	// List of all authors who contributed
+	Authors []Author
+	// Copyright of the binary if any
+	Copyright string
+	// Name of Author (Note: Use App.Authors, this is deprecated)
+	Author string
+	// Email of Author (Note: Use App.Authors, this is deprecated)
+	Email string
+	// Writer writer to write output to
+	Writer io.Writer
+	// ErrWriter writes error output
+	ErrWriter io.Writer
+	// Other custom info
+	Metadata map[string]interface{}
+	// Carries a function which returns app specific info.
+	ExtraInfo func() map[string]string
+	// CustomAppHelpTemplate the text template for app help topic.
+	// cli.go uses text/template to render templates. You can
+	// render custom help text by setting this variable.
+	CustomAppHelpTemplate string
+
+	didSetup bool
+}
+
+// Tries to find out when this binary was compiled.
+// Returns the current time if it fails to find it.
+func compileTime() time.Time {
+	info, err := os.Stat(os.Args[0])
+	if err != nil {
+		return time.Now()
+	}
+	return info.ModTime()
+}
+
+// NewApp creates a new cli Application with some reasonable defaults for Name,
+// Usage, Version and Action.
+func NewApp() *App {
+	return &App{
+		Name:         filepath.Base(os.Args[0]),
+		HelpName:     filepath.Base(os.Args[0]),
+		Usage:        "A new cli application",
+		UsageText:    "",
+		Version:      "0.0.0",
+		BashComplete: DefaultAppComplete,
+		Action:       helpCommand.Action,
+		Compiled:     compileTime(),
+		Writer:       os.Stdout,
+	}
+}
+
+// Setup runs initialization code to ensure all data structures are ready for
+// `Run` or inspection prior to `Run`.  It is internally called by `Run`, but
+// will return early if setup has already happened.
+func (a *App) Setup() {
+	if a.didSetup {
+		return
+	}
+
+	a.didSetup = true
+
+	if a.Author != "" || a.Email != "" {
+		a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
+	}
+
+	newCmds := []Command{}
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		}
+		newCmds = append(newCmds, c)
+	}
+	a.Commands = newCmds
+
+	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+		a.Commands = append(a.Commands, helpCommand)
+		if (HelpFlag != BoolFlag{}) {
+			a.appendFlag(HelpFlag)
+		}
+	}
+
+	if !a.HideVersion {
+		a.appendFlag(VersionFlag)
+	}
+
+	a.categories = CommandCategories{}
+	for _, command := range a.Commands {
+		a.categories = a.categories.AddCommand(command.Category, command)
+	}
+	sort.Sort(a.categories)
+
+	if a.Metadata == nil {
+		a.Metadata = make(map[string]interface{})
+	}
+
+	if a.Writer == nil {
+		a.Writer = os.Stdout
+	}
+}
+
+// Run is the entry point to the cli app. Parses the arguments slice and routes
+// to the proper flag/args combination
+func (a *App) Run(arguments []string) (err error) {
+	a.Setup()
+
+	// handle the completion flag separately from the flagset since
+	// completion could be attempted after a flag, but before its value was put
+	// on the command line. this causes the flagset to interpret the completion
+	// flag name as the value of the flag before it which is undesirable
+	// note that we can only do this because the shell autocomplete function
+	// always appends the completion flag at the end of the command
+	shellComplete, arguments := checkShellCompleteFlag(a, arguments)
+
+	// parse flags
+	set, err := flagSet(a.Name, a.Flags)
+	if err != nil {
+		return err
+	}
+
+	set.SetOutput(ioutil.Discard)
+	err = set.Parse(arguments[1:])
+	nerr := normalizeFlags(a.Flags, set)
+	context := NewContext(a, set, nil)
+	if nerr != nil {
+		fmt.Fprintln(a.Writer, nerr)
+		ShowAppHelp(context)
+		return nerr
+	}
+	context.shellComplete = shellComplete
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if err != nil {
+		if a.OnUsageError != nil {
+			err := a.OnUsageError(context, err, false)
+			HandleExitCoder(err)
+			return err
+		}
+		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		ShowAppHelp(context)
+		return err
+	}
+
+	if !a.HideHelp && checkHelp(context) {
+		ShowAppHelp(context)
+		return nil
+	}
+
+	if !a.HideVersion && checkVersion(context) {
+		ShowVersion(context)
+		return nil
+	}
+
+	if a.After != nil {
+		defer func() {
+			if afterErr := a.After(context); afterErr != nil {
+				if err != nil {
+					err = NewMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if a.Before != nil {
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			ShowAppHelp(context)
+			HandleExitCoder(beforeErr)
+			err = beforeErr
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	if a.Action == nil {
+		a.Action = helpCommand.Action
+	}
+
+	// Run default Action
+	err = HandleAction(a.Action, context)
+
+	HandleExitCoder(err)
+	return err
+}
+
+// RunAndExitOnError calls .Run() and exits non-zero if an error was returned
+//
+// Deprecated: instead you should return an error that fulfills cli.ExitCoder
+// to cli.App.Run. This will cause the application to exit with the given eror
+// code in the cli.ExitCoder
+func (a *App) RunAndExitOnError() {
+	if err := a.Run(os.Args); err != nil {
+		fmt.Fprintln(a.errWriter(), err)
+		OsExiter(1)
+	}
+}
+
+// RunAsSubcommand invokes the subcommand given the context, parses ctx.Args() to
+// generate command-specific flags
+func (a *App) RunAsSubcommand(ctx *Context) (err error) {
+	// append help to commands
+	if len(a.Commands) > 0 {
+		if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+			a.Commands = append(a.Commands, helpCommand)
+			if (HelpFlag != BoolFlag{}) {
+				a.appendFlag(HelpFlag)
+			}
+		}
+	}
+
+	newCmds := []Command{}
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		}
+		newCmds = append(newCmds, c)
+	}
+	a.Commands = newCmds
+
+	// parse flags
+	set, err := flagSet(a.Name, a.Flags)
+	if err != nil {
+		return err
+	}
+
+	set.SetOutput(ioutil.Discard)
+	err = set.Parse(ctx.Args().Tail())
+	nerr := normalizeFlags(a.Flags, set)
+	context := NewContext(a, set, ctx)
+
+	if nerr != nil {
+		fmt.Fprintln(a.Writer, nerr)
+		fmt.Fprintln(a.Writer)
+		if len(a.Commands) > 0 {
+			ShowSubcommandHelp(context)
+		} else {
+			ShowCommandHelp(ctx, context.Args().First())
+		}
+		return nerr
+	}
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if err != nil {
+		if a.OnUsageError != nil {
+			err = a.OnUsageError(context, err, true)
+			HandleExitCoder(err)
+			return err
+		}
+		fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		ShowSubcommandHelp(context)
+		return err
+	}
+
+	if len(a.Commands) > 0 {
+		if checkSubcommandHelp(context) {
+			return nil
+		}
+	} else {
+		if checkCommandHelp(ctx, context.Args().First()) {
+			return nil
+		}
+	}
+
+	if a.After != nil {
+		defer func() {
+			afterErr := a.After(context)
+			if afterErr != nil {
+				HandleExitCoder(err)
+				if err != nil {
+					err = NewMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if a.Before != nil {
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			HandleExitCoder(beforeErr)
+			err = beforeErr
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	// Run default Action
+	err = HandleAction(a.Action, context)
+
+	HandleExitCoder(err)
+	return err
+}
+
+// Command returns the named command on App. Returns nil if the command does not exist
+func (a *App) Command(name string) *Command {
+	for _, c := range a.Commands {
+		if c.HasName(name) {
+			return &c
+		}
+	}
+
+	return nil
+}
+
+// Categories returns a slice containing all the categories with the commands they contain
+func (a *App) Categories() CommandCategories {
+	return a.categories
+}
+
+// VisibleCategories returns a slice of categories and commands that are
+// Hidden=false
+func (a *App) VisibleCategories() []*CommandCategory {
+	ret := []*CommandCategory{}
+	for _, category := range a.categories {
+		if visible := func() *CommandCategory {
+			for _, command := range category.Commands {
+				if !command.Hidden {
+					return category
+				}
+			}
+			return nil
+		}(); visible != nil {
+			ret = append(ret, visible)
+		}
+	}
+	return ret
+}
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (a *App) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range a.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (a *App) VisibleFlags() []Flag {
+	return visibleFlags(a.Flags)
+}
+
+func (a *App) hasFlag(flag Flag) bool {
+	for _, f := range a.Flags {
+		if flag == f {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (a *App) errWriter() io.Writer {
+
+	// When the app ErrWriter is nil use the package level one.
+	if a.ErrWriter == nil {
+		return ErrWriter
+	}
+
+	return a.ErrWriter
+}
+
+func (a *App) appendFlag(flag Flag) {
+	if !a.hasFlag(flag) {
+		a.Flags = append(a.Flags, flag)
+	}
+}
+
+// Author represents someone who has contributed to a cli project.
+type Author struct {
+	Name  string // The Authors name
+	Email string // The Authors email
+}
+
+// String makes Author comply to the Stringer interface, to allow an easy print in the templating process
+func (a Author) String() string {
+	e := ""
+	if a.Email != "" {
+		e = " <" + a.Email + ">"
+	}
+
+	return fmt.Sprintf("%v%v", a.Name, e)
+}
+
+// HandleAction attempts to figure out which Action signature was used.  If
+// it's an ActionFunc or a func with the legacy signature for Action, the func
+// is run!
+func HandleAction(action interface{}, context *Context) (err error) {
+	if a, ok := action.(ActionFunc); ok {
+		return a(context)
+	} else if a, ok := action.(func(*Context) error); ok {
+		return a(context)
+	} else if a, ok := action.(func(*Context)); ok { // deprecated function signature
+		a(context)
+		return nil
+	} else {
+		return errInvalidActionType
+	}
+}
diff --git a/vendor/github.com/urfave/cli/appveyor.yml b/vendor/github.com/urfave/cli/appveyor.yml
new file mode 100644
index 00000000..1e1489c3
--- /dev/null
+++ b/vendor/github.com/urfave/cli/appveyor.yml
@@ -0,0 +1,26 @@
+version: "{build}"
+
+os: Windows Server 2016
+
+image: Visual Studio 2017
+
+clone_folder: c:\gopath\src\github.com\urfave\cli
+
+environment:
+  GOPATH: C:\gopath
+  GOVERSION: 1.8.x
+  PYTHON: C:\Python36-x64
+  PYTHON_VERSION: 3.6.x
+  PYTHON_ARCH: 64
+
+install:
+- set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
+- go version
+- go env
+- go get github.com/urfave/gfmrun/...
+- go get -v -t ./...
+
+build_script:
+- python runtests vet
+- python runtests test
+- python runtests gfmrun
diff --git a/vendor/github.com/urfave/cli/category.go b/vendor/github.com/urfave/cli/category.go
new file mode 100644
index 00000000..1a605502
--- /dev/null
+++ b/vendor/github.com/urfave/cli/category.go
@@ -0,0 +1,44 @@
+package cli
+
+// CommandCategories is a slice of *CommandCategory.
+type CommandCategories []*CommandCategory
+
+// CommandCategory is a category containing commands.
+type CommandCategory struct {
+	Name     string
+	Commands Commands
+}
+
+func (c CommandCategories) Less(i, j int) bool {
+	return c[i].Name < c[j].Name
+}
+
+func (c CommandCategories) Len() int {
+	return len(c)
+}
+
+func (c CommandCategories) Swap(i, j int) {
+	c[i], c[j] = c[j], c[i]
+}
+
+// AddCommand adds a command to a category.
+func (c CommandCategories) AddCommand(category string, command Command) CommandCategories {
+	for _, commandCategory := range c {
+		if commandCategory.Name == category {
+			commandCategory.Commands = append(commandCategory.Commands, command)
+			return c
+		}
+	}
+	return append(c, &CommandCategory{Name: category, Commands: []Command{command}})
+}
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (c *CommandCategory) VisibleCommands() []Command {
+	ret := []Command{}
+	for _, command := range c.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
diff --git a/vendor/github.com/urfave/cli/cli.go b/vendor/github.com/urfave/cli/cli.go
new file mode 100644
index 00000000..90c07eb8
--- /dev/null
+++ b/vendor/github.com/urfave/cli/cli.go
@@ -0,0 +1,22 @@
+// Package cli provides a minimal framework for creating and organizing command line
+// Go applications. cli is designed to be easy to understand and write, the most simple
+// cli application can be written as follows:
+//   func main() {
+//     cli.NewApp().Run(os.Args)
+//   }
+//
+// Of course this application does not do much, so let's make this an actual application:
+//   func main() {
+//     app := cli.NewApp()
+//     app.Name = "greet"
+//     app.Usage = "say a greeting"
+//     app.Action = func(c *cli.Context) error {
+//       println("Greetings")
+//       return nil
+//     }
+//
+//     app.Run(os.Args)
+//   }
+package cli
+
+//go:generate python ./generate-flag-types cli -i flag-types.json -o flag_generated.go
diff --git a/vendor/github.com/urfave/cli/command.go b/vendor/github.com/urfave/cli/command.go
new file mode 100644
index 00000000..23de2944
--- /dev/null
+++ b/vendor/github.com/urfave/cli/command.go
@@ -0,0 +1,304 @@
+package cli
+
+import (
+	"fmt"
+	"io/ioutil"
+	"sort"
+	"strings"
+)
+
+// Command is a subcommand for a cli.App.
+type Command struct {
+	// The name of the command
+	Name string
+	// short name of the command. Typically one character (deprecated, use `Aliases`)
+	ShortName string
+	// A list of aliases for the command
+	Aliases []string
+	// A short description of the usage of this command
+	Usage string
+	// Custom text to show on USAGE section of help
+	UsageText string
+	// A longer explanation of how the command works
+	Description string
+	// A short description of the arguments of this command
+	ArgsUsage string
+	// The category the command is part of
+	Category string
+	// The function to call when checking for bash command completions
+	BashComplete BashCompleteFunc
+	// An action to execute before any sub-subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no sub-subcommands are run
+	Before BeforeFunc
+	// An action to execute after any subcommands are run, but after the subcommand has finished
+	// It is run even if Action() panics
+	After AfterFunc
+	// The function to call when this command is invoked
+	Action interface{}
+	// TODO: replace `Action: interface{}` with `Action: ActionFunc` once some kind
+	// of deprecation period has passed, maybe?
+
+	// Execute this function if a usage error occurs.
+	OnUsageError OnUsageErrorFunc
+	// List of child commands
+	Subcommands Commands
+	// List of flags to parse
+	Flags []Flag
+	// Treat all flags as normal arguments if true
+	SkipFlagParsing bool
+	// Skip argument reordering which attempts to move flags before arguments,
+	// but only works if all flags appear after all arguments. This behavior was
+	// removed n version 2 since it only works under specific conditions so we
+	// backport here by exposing it as an option for compatibility.
+	SkipArgReorder bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+	// Boolean to hide this command from help or completion
+	Hidden bool
+
+	// Full name of command for help, defaults to full command name, including parent commands.
+	HelpName        string
+	commandNamePath []string
+
+	// CustomHelpTemplate the text template for the command help topic.
+	// cli.go uses text/template to render templates. You can
+	// render custom help text by setting this variable.
+	CustomHelpTemplate string
+}
+
+type CommandsByName []Command
+
+func (c CommandsByName) Len() int {
+	return len(c)
+}
+
+func (c CommandsByName) Less(i, j int) bool {
+	return c[i].Name < c[j].Name
+}
+
+func (c CommandsByName) Swap(i, j int) {
+	c[i], c[j] = c[j], c[i]
+}
+
+// FullName returns the full name of the command.
+// For subcommands this ensures that parent commands are part of the command path
+func (c Command) FullName() string {
+	if c.commandNamePath == nil {
+		return c.Name
+	}
+	return strings.Join(c.commandNamePath, " ")
+}
+
+// Commands is a slice of Command
+type Commands []Command
+
+// Run invokes the command given the context, parses ctx.Args() to generate command-specific flags
+func (c Command) Run(ctx *Context) (err error) {
+	if len(c.Subcommands) > 0 {
+		return c.startApp(ctx)
+	}
+
+	if !c.HideHelp && (HelpFlag != BoolFlag{}) {
+		// append help to flags
+		c.Flags = append(
+			c.Flags,
+			HelpFlag,
+		)
+	}
+
+	set, err := flagSet(c.Name, c.Flags)
+	if err != nil {
+		return err
+	}
+	set.SetOutput(ioutil.Discard)
+
+	if c.SkipFlagParsing {
+		err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
+	} else if !c.SkipArgReorder {
+		firstFlagIndex := -1
+		terminatorIndex := -1
+		for index, arg := range ctx.Args() {
+			if arg == "--" {
+				terminatorIndex = index
+				break
+			} else if arg == "-" {
+				// Do nothing. A dash alone is not really a flag.
+				continue
+			} else if strings.HasPrefix(arg, "-") && firstFlagIndex == -1 {
+				firstFlagIndex = index
+			}
+		}
+
+		if firstFlagIndex > -1 {
+			args := ctx.Args()
+			regularArgs := make([]string, len(args[1:firstFlagIndex]))
+			copy(regularArgs, args[1:firstFlagIndex])
+
+			var flagArgs []string
+			if terminatorIndex > -1 {
+				flagArgs = args[firstFlagIndex:terminatorIndex]
+				regularArgs = append(regularArgs, args[terminatorIndex:]...)
+			} else {
+				flagArgs = args[firstFlagIndex:]
+			}
+
+			err = set.Parse(append(flagArgs, regularArgs...))
+		} else {
+			err = set.Parse(ctx.Args().Tail())
+		}
+	} else {
+		err = set.Parse(ctx.Args().Tail())
+	}
+
+	nerr := normalizeFlags(c.Flags, set)
+	if nerr != nil {
+		fmt.Fprintln(ctx.App.Writer, nerr)
+		fmt.Fprintln(ctx.App.Writer)
+		ShowCommandHelp(ctx, c.Name)
+		return nerr
+	}
+
+	context := NewContext(ctx.App, set, ctx)
+	context.Command = c
+	if checkCommandCompletions(context, c.Name) {
+		return nil
+	}
+
+	if err != nil {
+		if c.OnUsageError != nil {
+			err := c.OnUsageError(context, err, false)
+			HandleExitCoder(err)
+			return err
+		}
+		fmt.Fprintln(context.App.Writer, "Incorrect Usage:", err.Error())
+		fmt.Fprintln(context.App.Writer)
+		ShowCommandHelp(context, c.Name)
+		return err
+	}
+
+	if checkCommandHelp(context, c.Name) {
+		return nil
+	}
+
+	if c.After != nil {
+		defer func() {
+			afterErr := c.After(context)
+			if afterErr != nil {
+				HandleExitCoder(err)
+				if err != nil {
+					err = NewMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if c.Before != nil {
+		err = c.Before(context)
+		if err != nil {
+			ShowCommandHelp(context, c.Name)
+			HandleExitCoder(err)
+			return err
+		}
+	}
+
+	if c.Action == nil {
+		c.Action = helpSubcommand.Action
+	}
+
+	err = HandleAction(c.Action, context)
+
+	if err != nil {
+		HandleExitCoder(err)
+	}
+	return err
+}
+
+// Names returns the names including short names and aliases.
+func (c Command) Names() []string {
+	names := []string{c.Name}
+
+	if c.ShortName != "" {
+		names = append(names, c.ShortName)
+	}
+
+	return append(names, c.Aliases...)
+}
+
+// HasName returns true if Command.Name or Command.ShortName matches given name
+func (c Command) HasName(name string) bool {
+	for _, n := range c.Names() {
+		if n == name {
+			return true
+		}
+	}
+	return false
+}
+
+func (c Command) startApp(ctx *Context) error {
+	app := NewApp()
+	app.Metadata = ctx.App.Metadata
+	// set the name and usage
+	app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
+	if c.HelpName == "" {
+		app.HelpName = c.HelpName
+	} else {
+		app.HelpName = app.Name
+	}
+
+	app.Usage = c.Usage
+	app.Description = c.Description
+	app.ArgsUsage = c.ArgsUsage
+
+	// set CommandNotFound
+	app.CommandNotFound = ctx.App.CommandNotFound
+	app.CustomAppHelpTemplate = c.CustomHelpTemplate
+
+	// set the flags and commands
+	app.Commands = c.Subcommands
+	app.Flags = c.Flags
+	app.HideHelp = c.HideHelp
+
+	app.Version = ctx.App.Version
+	app.HideVersion = ctx.App.HideVersion
+	app.Compiled = ctx.App.Compiled
+	app.Author = ctx.App.Author
+	app.Email = ctx.App.Email
+	app.Writer = ctx.App.Writer
+	app.ErrWriter = ctx.App.ErrWriter
+
+	app.categories = CommandCategories{}
+	for _, command := range c.Subcommands {
+		app.categories = app.categories.AddCommand(command.Category, command)
+	}
+
+	sort.Sort(app.categories)
+
+	// bash completion
+	app.EnableBashCompletion = ctx.App.EnableBashCompletion
+	if c.BashComplete != nil {
+		app.BashComplete = c.BashComplete
+	}
+
+	// set the actions
+	app.Before = c.Before
+	app.After = c.After
+	if c.Action != nil {
+		app.Action = c.Action
+	} else {
+		app.Action = helpSubcommand.Action
+	}
+	app.OnUsageError = c.OnUsageError
+
+	for index, cc := range app.Commands {
+		app.Commands[index].commandNamePath = []string{c.Name, cc.Name}
+	}
+
+	return app.RunAsSubcommand(ctx)
+}
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (c Command) VisibleFlags() []Flag {
+	return visibleFlags(c.Flags)
+}
diff --git a/vendor/github.com/urfave/cli/context.go b/vendor/github.com/urfave/cli/context.go
new file mode 100644
index 00000000..db94191e
--- /dev/null
+++ b/vendor/github.com/urfave/cli/context.go
@@ -0,0 +1,278 @@
+package cli
+
+import (
+	"errors"
+	"flag"
+	"reflect"
+	"strings"
+	"syscall"
+)
+
+// Context is a type that is passed through to
+// each Handler action in a cli application. Context
+// can be used to retrieve context-specific Args and
+// parsed command-line options.
+type Context struct {
+	App           *App
+	Command       Command
+	shellComplete bool
+	flagSet       *flag.FlagSet
+	setFlags      map[string]bool
+	parentContext *Context
+}
+
+// NewContext creates a new context. For use in when invoking an App or Command action.
+func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
+	c := &Context{App: app, flagSet: set, parentContext: parentCtx}
+
+	if parentCtx != nil {
+		c.shellComplete = parentCtx.shellComplete
+	}
+
+	return c
+}
+
+// NumFlags returns the number of flags set
+func (c *Context) NumFlags() int {
+	return c.flagSet.NFlag()
+}
+
+// Set sets a context flag to a value.
+func (c *Context) Set(name, value string) error {
+	c.setFlags = nil
+	return c.flagSet.Set(name, value)
+}
+
+// GlobalSet sets a context flag to a value on the global flagset
+func (c *Context) GlobalSet(name, value string) error {
+	globalContext(c).setFlags = nil
+	return globalContext(c).flagSet.Set(name, value)
+}
+
+// IsSet determines if the flag was actually set
+func (c *Context) IsSet(name string) bool {
+	if c.setFlags == nil {
+		c.setFlags = make(map[string]bool)
+
+		c.flagSet.Visit(func(f *flag.Flag) {
+			c.setFlags[f.Name] = true
+		})
+
+		c.flagSet.VisitAll(func(f *flag.Flag) {
+			if _, ok := c.setFlags[f.Name]; ok {
+				return
+			}
+			c.setFlags[f.Name] = false
+		})
+
+		// XXX hack to support IsSet for flags with EnvVar
+		//
+		// There isn't an easy way to do this with the current implementation since
+		// whether a flag was set via an environment variable is very difficult to
+		// determine here. Instead, we intend to introduce a backwards incompatible
+		// change in version 2 to add `IsSet` to the Flag interface to push the
+		// responsibility closer to where the information required to determine
+		// whether a flag is set by non-standard means such as environment
+		// variables is avaliable.
+		//
+		// See https://github.com/urfave/cli/issues/294 for additional discussion
+		flags := c.Command.Flags
+		if c.Command.Name == "" { // cannot == Command{} since it contains slice types
+			if c.App != nil {
+				flags = c.App.Flags
+			}
+		}
+		for _, f := range flags {
+			eachName(f.GetName(), func(name string) {
+				if isSet, ok := c.setFlags[name]; isSet || !ok {
+					return
+				}
+
+				val := reflect.ValueOf(f)
+				if val.Kind() == reflect.Ptr {
+					val = val.Elem()
+				}
+
+				envVarValue := val.FieldByName("EnvVar")
+				if !envVarValue.IsValid() {
+					return
+				}
+
+				eachName(envVarValue.String(), func(envVar string) {
+					envVar = strings.TrimSpace(envVar)
+					if _, ok := syscall.Getenv(envVar); ok {
+						c.setFlags[name] = true
+						return
+					}
+				})
+			})
+		}
+	}
+
+	return c.setFlags[name]
+}
+
+// GlobalIsSet determines if the global flag was actually set
+func (c *Context) GlobalIsSet(name string) bool {
+	ctx := c
+	if ctx.parentContext != nil {
+		ctx = ctx.parentContext
+	}
+
+	for ; ctx != nil; ctx = ctx.parentContext {
+		if ctx.IsSet(name) {
+			return true
+		}
+	}
+	return false
+}
+
+// FlagNames returns a slice of flag names used in this context.
+func (c *Context) FlagNames() (names []string) {
+	for _, flag := range c.Command.Flags {
+		name := strings.Split(flag.GetName(), ",")[0]
+		if name == "help" {
+			continue
+		}
+		names = append(names, name)
+	}
+	return
+}
+
+// GlobalFlagNames returns a slice of global flag names used by the app.
+func (c *Context) GlobalFlagNames() (names []string) {
+	for _, flag := range c.App.Flags {
+		name := strings.Split(flag.GetName(), ",")[0]
+		if name == "help" || name == "version" {
+			continue
+		}
+		names = append(names, name)
+	}
+	return
+}
+
+// Parent returns the parent context, if any
+func (c *Context) Parent() *Context {
+	return c.parentContext
+}
+
+// value returns the value of the flag coressponding to `name`
+func (c *Context) value(name string) interface{} {
+	return c.flagSet.Lookup(name).Value.(flag.Getter).Get()
+}
+
+// Args contains apps console arguments
+type Args []string
+
+// Args returns the command line arguments associated with the context.
+func (c *Context) Args() Args {
+	args := Args(c.flagSet.Args())
+	return args
+}
+
+// NArg returns the number of the command line arguments.
+func (c *Context) NArg() int {
+	return len(c.Args())
+}
+
+// Get returns the nth argument, or else a blank string
+func (a Args) Get(n int) string {
+	if len(a) > n {
+		return a[n]
+	}
+	return ""
+}
+
+// First returns the first argument, or else a blank string
+func (a Args) First() string {
+	return a.Get(0)
+}
+
+// Tail returns the rest of the arguments (not the first one)
+// or else an empty string slice
+func (a Args) Tail() []string {
+	if len(a) >= 2 {
+		return []string(a)[1:]
+	}
+	return []string{}
+}
+
+// Present checks if there are any arguments present
+func (a Args) Present() bool {
+	return len(a) != 0
+}
+
+// Swap swaps arguments at the given indexes
+func (a Args) Swap(from, to int) error {
+	if from >= len(a) || to >= len(a) {
+		return errors.New("index out of range")
+	}
+	a[from], a[to] = a[to], a[from]
+	return nil
+}
+
+func globalContext(ctx *Context) *Context {
+	if ctx == nil {
+		return nil
+	}
+
+	for {
+		if ctx.parentContext == nil {
+			return ctx
+		}
+		ctx = ctx.parentContext
+	}
+}
+
+func lookupGlobalFlagSet(name string, ctx *Context) *flag.FlagSet {
+	if ctx.parentContext != nil {
+		ctx = ctx.parentContext
+	}
+	for ; ctx != nil; ctx = ctx.parentContext {
+		if f := ctx.flagSet.Lookup(name); f != nil {
+			return ctx.flagSet
+		}
+	}
+	return nil
+}
+
+func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
+	switch ff.Value.(type) {
+	case *StringSlice:
+	default:
+		set.Set(name, ff.Value.String())
+	}
+}
+
+func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
+	visited := make(map[string]bool)
+	set.Visit(func(f *flag.Flag) {
+		visited[f.Name] = true
+	})
+	for _, f := range flags {
+		parts := strings.Split(f.GetName(), ",")
+		if len(parts) == 1 {
+			continue
+		}
+		var ff *flag.Flag
+		for _, name := range parts {
+			name = strings.Trim(name, " ")
+			if visited[name] {
+				if ff != nil {
+					return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name)
+				}
+				ff = set.Lookup(name)
+			}
+		}
+		if ff == nil {
+			continue
+		}
+		for _, name := range parts {
+			name = strings.Trim(name, " ")
+			if !visited[name] {
+				copyFlag(name, ff, set)
+			}
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/urfave/cli/errors.go b/vendor/github.com/urfave/cli/errors.go
new file mode 100644
index 00000000..562b2953
--- /dev/null
+++ b/vendor/github.com/urfave/cli/errors.go
@@ -0,0 +1,115 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// OsExiter is the function used when the app exits. If not set defaults to os.Exit.
+var OsExiter = os.Exit
+
+// ErrWriter is used to write errors to the user. This can be anything
+// implementing the io.Writer interface and defaults to os.Stderr.
+var ErrWriter io.Writer = os.Stderr
+
+// MultiError is an error that wraps multiple errors.
+type MultiError struct {
+	Errors []error
+}
+
+// NewMultiError creates a new MultiError. Pass in one or more errors.
+func NewMultiError(err ...error) MultiError {
+	return MultiError{Errors: err}
+}
+
+// Error implements the error interface.
+func (m MultiError) Error() string {
+	errs := make([]string, len(m.Errors))
+	for i, err := range m.Errors {
+		errs[i] = err.Error()
+	}
+
+	return strings.Join(errs, "\n")
+}
+
+type ErrorFormatter interface {
+	Format(s fmt.State, verb rune)
+}
+
+// ExitCoder is the interface checked by `App` and `Command` for a custom exit
+// code
+type ExitCoder interface {
+	error
+	ExitCode() int
+}
+
+// ExitError fulfills both the builtin `error` interface and `ExitCoder`
+type ExitError struct {
+	exitCode int
+	message  interface{}
+}
+
+// NewExitError makes a new *ExitError
+func NewExitError(message interface{}, exitCode int) *ExitError {
+	return &ExitError{
+		exitCode: exitCode,
+		message:  message,
+	}
+}
+
+// Error returns the string message, fulfilling the interface required by
+// `error`
+func (ee *ExitError) Error() string {
+	return fmt.Sprintf("%v", ee.message)
+}
+
+// ExitCode returns the exit code, fulfilling the interface required by
+// `ExitCoder`
+func (ee *ExitError) ExitCode() int {
+	return ee.exitCode
+}
+
+// HandleExitCoder checks if the error fulfills the ExitCoder interface, and if
+// so prints the error to stderr (if it is non-empty) and calls OsExiter with the
+// given exit code.  If the given error is a MultiError, then this func is
+// called on all members of the Errors slice and calls OsExiter with the last exit code.
+func HandleExitCoder(err error) {
+	if err == nil {
+		return
+	}
+
+	if exitErr, ok := err.(ExitCoder); ok {
+		if err.Error() != "" {
+			if _, ok := exitErr.(ErrorFormatter); ok {
+				fmt.Fprintf(ErrWriter, "%+v\n", err)
+			} else {
+				fmt.Fprintln(ErrWriter, err)
+			}
+		}
+		OsExiter(exitErr.ExitCode())
+		return
+	}
+
+	if multiErr, ok := err.(MultiError); ok {
+		code := handleMultiError(multiErr)
+		OsExiter(code)
+		return
+	}
+}
+
+func handleMultiError(multiErr MultiError) int {
+	code := 1
+	for _, merr := range multiErr.Errors {
+		if multiErr2, ok := merr.(MultiError); ok {
+			code = handleMultiError(multiErr2)
+		} else {
+			fmt.Fprintln(ErrWriter, merr)
+			if exitErr, ok := merr.(ExitCoder); ok {
+				code = exitErr.ExitCode()
+			}
+		}
+	}
+	return code
+}
diff --git a/vendor/github.com/urfave/cli/flag-types.json b/vendor/github.com/urfave/cli/flag-types.json
new file mode 100644
index 00000000..12231078
--- /dev/null
+++ b/vendor/github.com/urfave/cli/flag-types.json
@@ -0,0 +1,93 @@
+[
+  {
+    "name": "Bool",
+    "type": "bool",
+    "value": false,
+    "context_default": "false",
+    "parser": "strconv.ParseBool(f.Value.String())"
+  },
+  {
+    "name": "BoolT",
+    "type": "bool",
+    "value": false,
+    "doctail": " that is true by default",
+    "context_default": "false",
+    "parser": "strconv.ParseBool(f.Value.String())"
+  },
+  {
+    "name": "Duration",
+    "type": "time.Duration",
+    "doctail": " (see https://golang.org/pkg/time/#ParseDuration)",
+    "context_default": "0",
+    "parser": "time.ParseDuration(f.Value.String())"
+  },
+  {
+    "name": "Float64",
+    "type": "float64",
+    "context_default": "0",
+    "parser": "strconv.ParseFloat(f.Value.String(), 64)"
+  },
+  {
+    "name": "Generic",
+    "type": "Generic",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "interface{}"
+  },
+  {
+    "name": "Int64",
+    "type": "int64",
+    "context_default": "0",
+    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)"
+  },
+  {
+    "name": "Int",
+    "type": "int",
+    "context_default": "0",
+    "parser": "strconv.ParseInt(f.Value.String(), 0, 64)",
+    "parser_cast": "int(parsed)"
+  },
+  {
+    "name": "IntSlice",
+    "type": "*IntSlice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]int",
+    "parser": "(f.Value.(*IntSlice)).Value(), error(nil)"
+  },
+  {
+    "name": "Int64Slice",
+    "type": "*Int64Slice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]int64",
+    "parser": "(f.Value.(*Int64Slice)).Value(), error(nil)"
+  },
+  {
+    "name": "String",
+    "type": "string",
+    "context_default": "\"\"",
+    "parser": "f.Value.String(), error(nil)"
+  },
+  {
+    "name": "StringSlice",
+    "type": "*StringSlice",
+    "dest": false,
+    "context_default": "nil",
+    "context_type": "[]string",
+    "parser": "(f.Value.(*StringSlice)).Value(), error(nil)"
+  },
+  {
+    "name": "Uint64",
+    "type": "uint64",
+    "context_default": "0",
+    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)"
+  },
+  {
+    "name": "Uint",
+    "type": "uint",
+    "context_default": "0",
+    "parser": "strconv.ParseUint(f.Value.String(), 0, 64)",
+    "parser_cast": "uint(parsed)"
+  }
+]
diff --git a/vendor/github.com/urfave/cli/flag.go b/vendor/github.com/urfave/cli/flag.go
new file mode 100644
index 00000000..877ff352
--- /dev/null
+++ b/vendor/github.com/urfave/cli/flag.go
@@ -0,0 +1,799 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"reflect"
+	"runtime"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+)
+
+const defaultPlaceholder = "value"
+
+// BashCompletionFlag enables bash-completion for all commands and subcommands
+var BashCompletionFlag Flag = BoolFlag{
+	Name:   "generate-bash-completion",
+	Hidden: true,
+}
+
+// VersionFlag prints the version for the application
+var VersionFlag Flag = BoolFlag{
+	Name:  "version, v",
+	Usage: "print the version",
+}
+
+// HelpFlag prints the help for all commands and subcommands
+// Set to the zero value (BoolFlag{}) to disable flag -- keeps subcommand
+// unless HideHelp is set to true)
+var HelpFlag Flag = BoolFlag{
+	Name:  "help, h",
+	Usage: "show help",
+}
+
+// FlagStringer converts a flag definition to a string. This is used by help
+// to display a flag.
+var FlagStringer FlagStringFunc = stringifyFlag
+
+// FlagsByName is a slice of Flag.
+type FlagsByName []Flag
+
+func (f FlagsByName) Len() int {
+	return len(f)
+}
+
+func (f FlagsByName) Less(i, j int) bool {
+	return f[i].GetName() < f[j].GetName()
+}
+
+func (f FlagsByName) Swap(i, j int) {
+	f[i], f[j] = f[j], f[i]
+}
+
+// Flag is a common interface related to parsing flags in cli.
+// For more advanced flag parsing techniques, it is recommended that
+// this interface be implemented.
+type Flag interface {
+	fmt.Stringer
+	// Apply Flag settings to the given flag set
+	Apply(*flag.FlagSet)
+	GetName() string
+}
+
+// errorableFlag is an interface that allows us to return errors during apply
+// it allows flags defined in this library to return errors in a fashion backwards compatible
+// TODO remove in v2 and modify the existing Flag interface to return errors
+type errorableFlag interface {
+	Flag
+
+	ApplyWithError(*flag.FlagSet) error
+}
+
+func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
+	set := flag.NewFlagSet(name, flag.ContinueOnError)
+
+	for _, f := range flags {
+		//TODO remove in v2 when errorableFlag is removed
+		if ef, ok := f.(errorableFlag); ok {
+			if err := ef.ApplyWithError(set); err != nil {
+				return nil, err
+			}
+		} else {
+			f.Apply(set)
+		}
+	}
+	return set, nil
+}
+
+func eachName(longName string, fn func(string)) {
+	parts := strings.Split(longName, ",")
+	for _, name := range parts {
+		name = strings.Trim(name, " ")
+		fn(name)
+	}
+}
+
+// Generic is a generic parseable type identified by a specific flag
+type Generic interface {
+	Set(value string) error
+	String() string
+}
+
+// Apply takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+// Ignores parsing errors
+func (f GenericFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+func (f GenericFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := f.Value
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if err := val.Set(envVal); err != nil {
+					return fmt.Errorf("could not parse %s as value for flag %s: %s", envVal, f.Name, err)
+				}
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// StringSlice is an opaque type for []string to satisfy flag.Value and flag.Getter
+type StringSlice []string
+
+// Set appends the string value to the list of values
+func (f *StringSlice) Set(value string) error {
+	*f = append(*f, value)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *StringSlice) String() string {
+	return fmt.Sprintf("%s", *f)
+}
+
+// Value returns the slice of strings set by this flag
+func (f *StringSlice) Value() []string {
+	return *f
+}
+
+// Get returns the slice of strings set by this flag
+func (f *StringSlice) Get() interface{} {
+	return *f
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f StringSliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				newVal := &StringSlice{}
+				for _, s := range strings.Split(envVal, ",") {
+					s = strings.TrimSpace(s)
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as string value for flag %s: %s", envVal, f.Name, err)
+					}
+				}
+				f.Value = newVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &StringSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// IntSlice is an opaque type for []int to satisfy flag.Value and flag.Getter
+type IntSlice []int
+
+// Set parses the value into an integer and appends it to the list of values
+func (f *IntSlice) Set(value string) error {
+	tmp, err := strconv.Atoi(value)
+	if err != nil {
+		return err
+	}
+	*f = append(*f, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *IntSlice) String() string {
+	return fmt.Sprintf("%#v", *f)
+}
+
+// Value returns the slice of ints set by this flag
+func (f *IntSlice) Value() []int {
+	return *f
+}
+
+// Get returns the slice of ints set by this flag
+func (f *IntSlice) Get() interface{} {
+	return *f
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f IntSliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				newVal := &IntSlice{}
+				for _, s := range strings.Split(envVal, ",") {
+					s = strings.TrimSpace(s)
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as int slice value for flag %s: %s", envVal, f.Name, err)
+					}
+				}
+				f.Value = newVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &IntSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+
+	return nil
+}
+
+// Int64Slice is an opaque type for []int to satisfy flag.Value and flag.Getter
+type Int64Slice []int64
+
+// Set parses the value into an integer and appends it to the list of values
+func (f *Int64Slice) Set(value string) error {
+	tmp, err := strconv.ParseInt(value, 10, 64)
+	if err != nil {
+		return err
+	}
+	*f = append(*f, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *Int64Slice) String() string {
+	return fmt.Sprintf("%#v", *f)
+}
+
+// Value returns the slice of ints set by this flag
+func (f *Int64Slice) Value() []int64 {
+	return *f
+}
+
+// Get returns the slice of ints set by this flag
+func (f *Int64Slice) Get() interface{} {
+	return *f
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Int64SliceFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				newVal := &Int64Slice{}
+				for _, s := range strings.Split(envVal, ",") {
+					s = strings.TrimSpace(s)
+					if err := newVal.Set(s); err != nil {
+						return fmt.Errorf("could not parse %s as int64 slice value for flag %s: %s", envVal, f.Name, err)
+					}
+				}
+				f.Value = newVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Value == nil {
+			f.Value = &Int64Slice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	})
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f BoolFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := false
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if envVal == "" {
+					val = false
+					break
+				}
+
+				envValBool, err := strconv.ParseBool(envVal)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				val = envValBool
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.BoolVar(f.Destination, name, val, f.Usage)
+			return
+		}
+		set.Bool(name, val, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f BoolTFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f BoolTFlag) ApplyWithError(set *flag.FlagSet) error {
+	val := true
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				if envVal == "" {
+					val = false
+					break
+				}
+
+				envValBool, err := strconv.ParseBool(envVal)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as bool value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				val = envValBool
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.BoolVar(f.Destination, name, val, f.Usage)
+			return
+		}
+		set.Bool(name, val, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f StringFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f StringFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				f.Value = envVal
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.StringVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.String(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f IntFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f IntFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValInt, err := strconv.ParseInt(envVal, 0, 64)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
+				}
+				f.Value = int(envValInt)
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.IntVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Int(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Int64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Int64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValInt, err := strconv.ParseInt(envVal, 0, 64)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as int value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				f.Value = envValInt
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Int64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Int64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f UintFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f UintFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValInt, err := strconv.ParseUint(envVal, 0, 64)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as uint value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				f.Value = uint(envValInt)
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.UintVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Uint64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValInt, err := strconv.ParseUint(envVal, 0, 64)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as uint64 value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				f.Value = uint64(envValInt)
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Uint64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Uint64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f DurationFlag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f DurationFlag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValDuration, err := time.ParseDuration(envVal)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as duration for flag %s: %s", envVal, f.Name, err)
+				}
+
+				f.Value = envValDuration
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.DurationVar(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Duration(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+// Apply populates the flag given the flag set and environment
+// Ignores errors
+func (f Float64Flag) Apply(set *flag.FlagSet) {
+	f.ApplyWithError(set)
+}
+
+// ApplyWithError populates the flag given the flag set and environment
+func (f Float64Flag) ApplyWithError(set *flag.FlagSet) error {
+	if f.EnvVar != "" {
+		for _, envVar := range strings.Split(f.EnvVar, ",") {
+			envVar = strings.TrimSpace(envVar)
+			if envVal, ok := syscall.Getenv(envVar); ok {
+				envValFloat, err := strconv.ParseFloat(envVal, 10)
+				if err != nil {
+					return fmt.Errorf("could not parse %s as float64 value for flag %s: %s", envVal, f.Name, err)
+				}
+
+				f.Value = float64(envValFloat)
+				break
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		if f.Destination != nil {
+			set.Float64Var(f.Destination, name, f.Value, f.Usage)
+			return
+		}
+		set.Float64(name, f.Value, f.Usage)
+	})
+
+	return nil
+}
+
+func visibleFlags(fl []Flag) []Flag {
+	visible := []Flag{}
+	for _, flag := range fl {
+		field := flagValue(flag).FieldByName("Hidden")
+		if !field.IsValid() || !field.Bool() {
+			visible = append(visible, flag)
+		}
+	}
+	return visible
+}
+
+func prefixFor(name string) (prefix string) {
+	if len(name) == 1 {
+		prefix = "-"
+	} else {
+		prefix = "--"
+	}
+
+	return
+}
+
+// Returns the placeholder, if any, and the unquoted usage string.
+func unquoteUsage(usage string) (string, string) {
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name := usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break
+		}
+	}
+	return "", usage
+}
+
+func prefixedNames(fullName, placeholder string) string {
+	var prefixed string
+	parts := strings.Split(fullName, ",")
+	for i, name := range parts {
+		name = strings.Trim(name, " ")
+		prefixed += prefixFor(name) + name
+		if placeholder != "" {
+			prefixed += " " + placeholder
+		}
+		if i < len(parts)-1 {
+			prefixed += ", "
+		}
+	}
+	return prefixed
+}
+
+func withEnvHint(envVar, str string) string {
+	envText := ""
+	if envVar != "" {
+		prefix := "$"
+		suffix := ""
+		sep := ", $"
+		if runtime.GOOS == "windows" {
+			prefix = "%"
+			suffix = "%"
+			sep = "%, %"
+		}
+		envText = fmt.Sprintf(" [%s%s%s]", prefix, strings.Join(strings.Split(envVar, ","), sep), suffix)
+	}
+	return str + envText
+}
+
+func flagValue(f Flag) reflect.Value {
+	fv := reflect.ValueOf(f)
+	for fv.Kind() == reflect.Ptr {
+		fv = reflect.Indirect(fv)
+	}
+	return fv
+}
+
+func stringifyFlag(f Flag) string {
+	fv := flagValue(f)
+
+	switch f.(type) {
+	case IntSliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyIntSliceFlag(f.(IntSliceFlag)))
+	case Int64SliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyInt64SliceFlag(f.(Int64SliceFlag)))
+	case StringSliceFlag:
+		return withEnvHint(fv.FieldByName("EnvVar").String(),
+			stringifyStringSliceFlag(f.(StringSliceFlag)))
+	}
+
+	placeholder, usage := unquoteUsage(fv.FieldByName("Usage").String())
+
+	needsPlaceholder := false
+	defaultValueString := ""
+
+	if val := fv.FieldByName("Value"); val.IsValid() {
+		needsPlaceholder = true
+		defaultValueString = fmt.Sprintf(" (default: %v)", val.Interface())
+
+		if val.Kind() == reflect.String && val.String() != "" {
+			defaultValueString = fmt.Sprintf(" (default: %q)", val.String())
+		}
+	}
+
+	if defaultValueString == " (default: )" {
+		defaultValueString = ""
+	}
+
+	if needsPlaceholder && placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultValueString))
+
+	return withEnvHint(fv.FieldByName("EnvVar").String(),
+		fmt.Sprintf("%s\t%s", prefixedNames(fv.FieldByName("Name").String(), placeholder), usageWithDefault))
+}
+
+func stringifyIntSliceFlag(f IntSliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifyInt64SliceFlag(f Int64SliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, fmt.Sprintf("%d", i))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifyStringSliceFlag(f StringSliceFlag) string {
+	defaultVals := []string{}
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, s := range f.Value.Value() {
+			if len(s) > 0 {
+				defaultVals = append(defaultVals, fmt.Sprintf("%q", s))
+			}
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Name, defaultVals)
+}
+
+func stringifySliceFlag(usage, name string, defaultVals []string) string {
+	placeholder, usage := unquoteUsage(usage)
+	if placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	defaultVal := ""
+	if len(defaultVals) > 0 {
+		defaultVal = fmt.Sprintf(" (default: %s)", strings.Join(defaultVals, ", "))
+	}
+
+	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
+	return fmt.Sprintf("%s\t%s", prefixedNames(name, placeholder), usageWithDefault)
+}
diff --git a/vendor/github.com/urfave/cli/flag_generated.go b/vendor/github.com/urfave/cli/flag_generated.go
new file mode 100644
index 00000000..491b6195
--- /dev/null
+++ b/vendor/github.com/urfave/cli/flag_generated.go
@@ -0,0 +1,627 @@
+package cli
+
+import (
+	"flag"
+	"strconv"
+	"time"
+)
+
+// WARNING: This file is generated!
+
+// BoolFlag is a flag with type bool
+type BoolFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolFlag) GetName() string {
+	return f.Name
+}
+
+// Bool looks up the value of a local BoolFlag, returns
+// false if not found
+func (c *Context) Bool(name string) bool {
+	return lookupBool(name, c.flagSet)
+}
+
+// GlobalBool looks up the value of a global BoolFlag, returns
+// false if not found
+func (c *Context) GlobalBool(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBool(name, fs)
+	}
+	return false
+}
+
+func lookupBool(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}
+
+// BoolTFlag is a flag with type bool that is true by default
+type BoolTFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Destination *bool
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f BoolTFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f BoolTFlag) GetName() string {
+	return f.Name
+}
+
+// BoolT looks up the value of a local BoolTFlag, returns
+// false if not found
+func (c *Context) BoolT(name string) bool {
+	return lookupBoolT(name, c.flagSet)
+}
+
+// GlobalBoolT looks up the value of a global BoolTFlag, returns
+// false if not found
+func (c *Context) GlobalBoolT(name string) bool {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupBoolT(name, fs)
+	}
+	return false
+}
+
+func lookupBoolT(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}
+
+// DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)
+type DurationFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       time.Duration
+	Destination *time.Duration
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f DurationFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f DurationFlag) GetName() string {
+	return f.Name
+}
+
+// Duration looks up the value of a local DurationFlag, returns
+// 0 if not found
+func (c *Context) Duration(name string) time.Duration {
+	return lookupDuration(name, c.flagSet)
+}
+
+// GlobalDuration looks up the value of a global DurationFlag, returns
+// 0 if not found
+func (c *Context) GlobalDuration(name string) time.Duration {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupDuration(name, fs)
+	}
+	return 0
+}
+
+func lookupDuration(name string, set *flag.FlagSet) time.Duration {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := time.ParseDuration(f.Value.String())
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// Float64Flag is a flag with type float64
+type Float64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       float64
+	Destination *float64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Float64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Float64Flag) GetName() string {
+	return f.Name
+}
+
+// Float64 looks up the value of a local Float64Flag, returns
+// 0 if not found
+func (c *Context) Float64(name string) float64 {
+	return lookupFloat64(name, c.flagSet)
+}
+
+// GlobalFloat64 looks up the value of a global Float64Flag, returns
+// 0 if not found
+func (c *Context) GlobalFloat64(name string) float64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return 0
+}
+
+func lookupFloat64(name string, set *flag.FlagSet) float64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseFloat(f.Value.String(), 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// GenericFlag is a flag with type Generic
+type GenericFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  Generic
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f GenericFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f GenericFlag) GetName() string {
+	return f.Name
+}
+
+// Generic looks up the value of a local GenericFlag, returns
+// nil if not found
+func (c *Context) Generic(name string) interface{} {
+	return lookupGeneric(name, c.flagSet)
+}
+
+// GlobalGeneric looks up the value of a global GenericFlag, returns
+// nil if not found
+func (c *Context) GlobalGeneric(name string) interface{} {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupGeneric(name, fs)
+	}
+	return nil
+}
+
+func lookupGeneric(name string, set *flag.FlagSet) interface{} {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value, error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Int64Flag is a flag with type int64
+type Int64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       int64
+	Destination *int64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64Flag) GetName() string {
+	return f.Name
+}
+
+// Int64 looks up the value of a local Int64Flag, returns
+// 0 if not found
+func (c *Context) Int64(name string) int64 {
+	return lookupInt64(name, c.flagSet)
+}
+
+// GlobalInt64 looks up the value of a global Int64Flag, returns
+// 0 if not found
+func (c *Context) GlobalInt64(name string) int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64(name, fs)
+	}
+	return 0
+}
+
+func lookupInt64(name string, set *flag.FlagSet) int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// IntFlag is a flag with type int
+type IntFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       int
+	Destination *int
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntFlag) GetName() string {
+	return f.Name
+}
+
+// Int looks up the value of a local IntFlag, returns
+// 0 if not found
+func (c *Context) Int(name string) int {
+	return lookupInt(name, c.flagSet)
+}
+
+// GlobalInt looks up the value of a global IntFlag, returns
+// 0 if not found
+func (c *Context) GlobalInt(name string) int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt(name, fs)
+	}
+	return 0
+}
+
+func lookupInt(name string, set *flag.FlagSet) int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return int(parsed)
+	}
+	return 0
+}
+
+// IntSliceFlag is a flag with type *IntSlice
+type IntSliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *IntSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f IntSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f IntSliceFlag) GetName() string {
+	return f.Name
+}
+
+// IntSlice looks up the value of a local IntSliceFlag, returns
+// nil if not found
+func (c *Context) IntSlice(name string) []int {
+	return lookupIntSlice(name, c.flagSet)
+}
+
+// GlobalIntSlice looks up the value of a global IntSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalIntSlice(name string) []int {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupIntSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupIntSlice(name string, set *flag.FlagSet) []int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*IntSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Int64SliceFlag is a flag with type *Int64Slice
+type Int64SliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *Int64Slice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Int64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Int64SliceFlag) GetName() string {
+	return f.Name
+}
+
+// Int64Slice looks up the value of a local Int64SliceFlag, returns
+// nil if not found
+func (c *Context) Int64Slice(name string) []int64 {
+	return lookupInt64Slice(name, c.flagSet)
+}
+
+// GlobalInt64Slice looks up the value of a global Int64SliceFlag, returns
+// nil if not found
+func (c *Context) GlobalInt64Slice(name string) []int64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupInt64Slice(name, fs)
+	}
+	return nil
+}
+
+func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*Int64Slice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// StringFlag is a flag with type string
+type StringFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       string
+	Destination *string
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringFlag) GetName() string {
+	return f.Name
+}
+
+// String looks up the value of a local StringFlag, returns
+// "" if not found
+func (c *Context) String(name string) string {
+	return lookupString(name, c.flagSet)
+}
+
+// GlobalString looks up the value of a global StringFlag, returns
+// "" if not found
+func (c *Context) GlobalString(name string) string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupString(name, fs)
+	}
+	return ""
+}
+
+func lookupString(name string, set *flag.FlagSet) string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value.String(), error(nil)
+		if err != nil {
+			return ""
+		}
+		return parsed
+	}
+	return ""
+}
+
+// StringSliceFlag is a flag with type *StringSlice
+type StringSliceFlag struct {
+	Name   string
+	Usage  string
+	EnvVar string
+	Hidden bool
+	Value  *StringSlice
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f StringSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f StringSliceFlag) GetName() string {
+	return f.Name
+}
+
+// StringSlice looks up the value of a local StringSliceFlag, returns
+// nil if not found
+func (c *Context) StringSlice(name string) []string {
+	return lookupStringSlice(name, c.flagSet)
+}
+
+// GlobalStringSlice looks up the value of a global StringSliceFlag, returns
+// nil if not found
+func (c *Context) GlobalStringSlice(name string) []string {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupStringSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupStringSlice(name string, set *flag.FlagSet) []string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*StringSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}
+
+// Uint64Flag is a flag with type uint64
+type Uint64Flag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       uint64
+	Destination *uint64
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f Uint64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f Uint64Flag) GetName() string {
+	return f.Name
+}
+
+// Uint64 looks up the value of a local Uint64Flag, returns
+// 0 if not found
+func (c *Context) Uint64(name string) uint64 {
+	return lookupUint64(name, c.flagSet)
+}
+
+// GlobalUint64 looks up the value of a global Uint64Flag, returns
+// 0 if not found
+func (c *Context) GlobalUint64(name string) uint64 {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint64(name, fs)
+	}
+	return 0
+}
+
+func lookupUint64(name string, set *flag.FlagSet) uint64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}
+
+// UintFlag is a flag with type uint
+type UintFlag struct {
+	Name        string
+	Usage       string
+	EnvVar      string
+	Hidden      bool
+	Value       uint
+	Destination *uint
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f UintFlag) String() string {
+	return FlagStringer(f)
+}
+
+// GetName returns the name of the flag
+func (f UintFlag) GetName() string {
+	return f.Name
+}
+
+// Uint looks up the value of a local UintFlag, returns
+// 0 if not found
+func (c *Context) Uint(name string) uint {
+	return lookupUint(name, c.flagSet)
+}
+
+// GlobalUint looks up the value of a global UintFlag, returns
+// 0 if not found
+func (c *Context) GlobalUint(name string) uint {
+	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+		return lookupUint(name, fs)
+	}
+	return 0
+}
+
+func lookupUint(name string, set *flag.FlagSet) uint {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return uint(parsed)
+	}
+	return 0
+}
diff --git a/vendor/github.com/urfave/cli/funcs.go b/vendor/github.com/urfave/cli/funcs.go
new file mode 100644
index 00000000..cba5e6cb
--- /dev/null
+++ b/vendor/github.com/urfave/cli/funcs.go
@@ -0,0 +1,28 @@
+package cli
+
+// BashCompleteFunc is an action to execute when the bash-completion flag is set
+type BashCompleteFunc func(*Context)
+
+// BeforeFunc is an action to execute before any subcommands are run, but after
+// the context is ready if a non-nil error is returned, no subcommands are run
+type BeforeFunc func(*Context) error
+
+// AfterFunc is an action to execute after any subcommands are run, but after the
+// subcommand has finished it is run even if Action() panics
+type AfterFunc func(*Context) error
+
+// ActionFunc is the action to execute when no subcommands are specified
+type ActionFunc func(*Context) error
+
+// CommandNotFoundFunc is executed if the proper command cannot be found
+type CommandNotFoundFunc func(*Context, string)
+
+// OnUsageErrorFunc is executed if an usage error occurs. This is useful for displaying
+// customized usage error messages.  This function is able to replace the
+// original error messages.  If this function is not set, the "Incorrect usage"
+// is displayed and the execution is interrupted.
+type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error
+
+// FlagStringFunc is used by the help generation to display a flag, which is
+// expected to be a single line.
+type FlagStringFunc func(Flag) string
diff --git a/vendor/github.com/urfave/cli/generate-flag-types b/vendor/github.com/urfave/cli/generate-flag-types
new file mode 100755
index 00000000..7147381c
--- /dev/null
+++ b/vendor/github.com/urfave/cli/generate-flag-types
@@ -0,0 +1,255 @@
+#!/usr/bin/env python
+"""
+The flag types that ship with the cli library have many things in common, and
+so we can take advantage of the `go generate` command to create much of the
+source code from a list of definitions.  These definitions attempt to cover
+the parts that vary between flag types, and should evolve as needed.
+
+An example of the minimum definition needed is:
+
+    {
+      "name": "SomeType",
+      "type": "sometype",
+      "context_default": "nil"
+    }
+
+In this example, the code generated for the `cli` package will include a type
+named `SomeTypeFlag` that is expected to wrap a value of type `sometype`.
+Fetching values by name via `*cli.Context` will default to a value of `nil`.
+
+A more complete, albeit somewhat redundant, example showing all available
+definition keys is:
+
+    {
+      "name": "VeryMuchType",
+      "type": "*VeryMuchType",
+      "value": true,
+      "dest": false,
+      "doctail": " which really only wraps a []float64, oh well!",
+      "context_type": "[]float64",
+      "context_default": "nil",
+      "parser": "parseVeryMuchType(f.Value.String())",
+      "parser_cast": "[]float64(parsed)"
+    }
+
+The meaning of each field is as follows:
+
+               name (string) - The type "name", which will be suffixed with
+                               `Flag` when generating the type definition
+                               for `cli` and the wrapper type for `altsrc`
+               type (string) - The type that the generated `Flag` type for `cli`
+                               is expected to "contain" as its `.Value` member
+                value (bool) - Should the generated `cli` type have a `Value`
+                               member?
+                 dest (bool) - Should the generated `cli` type support a
+                               destination pointer?
+            doctail (string) - Additional docs for the `cli` flag type comment
+       context_type (string) - The literal type used in the `*cli.Context`
+                               reader func signature
+    context_default (string) - The literal value used as the default by the
+                               `*cli.Context` reader funcs when no value is
+                               present
+             parser (string) - Literal code used to parse the flag `f`,
+                               expected to have a return signature of
+                               (value, error)
+        parser_cast (string) - Literal code used to cast the `parsed` value
+                               returned from the `parser` code
+"""
+
+from __future__ import print_function, unicode_literals
+
+import argparse
+import json
+import os
+import subprocess
+import sys
+import tempfile
+import textwrap
+
+
+class _FancyFormatter(argparse.ArgumentDefaultsHelpFormatter,
+                      argparse.RawDescriptionHelpFormatter):
+    pass
+
+
+def main(sysargs=sys.argv[:]):
+    parser = argparse.ArgumentParser(
+        description='Generate flag type code!',
+        formatter_class=_FancyFormatter)
+    parser.add_argument(
+        'package',
+        type=str, default='cli', choices=_WRITEFUNCS.keys(),
+        help='Package for which flag types will be generated'
+    )
+    parser.add_argument(
+        '-i', '--in-json',
+        type=argparse.FileType('r'),
+        default=sys.stdin,
+        help='Input JSON file which defines each type to be generated'
+    )
+    parser.add_argument(
+        '-o', '--out-go',
+        type=argparse.FileType('w'),
+        default=sys.stdout,
+        help='Output file/stream to which generated source will be written'
+    )
+    parser.epilog = __doc__
+
+    args = parser.parse_args(sysargs[1:])
+    _generate_flag_types(_WRITEFUNCS[args.package], args.out_go, args.in_json)
+    return 0
+
+
+def _generate_flag_types(writefunc, output_go, input_json):
+    types = json.load(input_json)
+
+    tmp = tempfile.NamedTemporaryFile(suffix='.go', delete=False)
+    writefunc(tmp, types)
+    tmp.close()
+
+    new_content = subprocess.check_output(
+        ['goimports', tmp.name]
+    ).decode('utf-8')
+
+    print(new_content, file=output_go, end='')
+    output_go.flush()
+    os.remove(tmp.name)
+
+
+def _set_typedef_defaults(typedef):
+    typedef.setdefault('doctail', '')
+    typedef.setdefault('context_type', typedef['type'])
+    typedef.setdefault('dest', True)
+    typedef.setdefault('value', True)
+    typedef.setdefault('parser', 'f.Value, error(nil)')
+    typedef.setdefault('parser_cast', 'parsed')
+
+
+def _write_cli_flag_types(outfile, types):
+    _fwrite(outfile, """\
+        package cli
+
+        // WARNING: This file is generated!
+
+        """)
+
+    for typedef in types:
+        _set_typedef_defaults(typedef)
+
+        _fwrite(outfile, """\
+        // {name}Flag is a flag with type {type}{doctail}
+        type {name}Flag struct {{
+            Name string
+            Usage string
+            EnvVar string
+            Hidden bool
+        """.format(**typedef))
+
+        if typedef['value']:
+            _fwrite(outfile, """\
+            Value {type}
+            """.format(**typedef))
+
+        if typedef['dest']:
+            _fwrite(outfile, """\
+            Destination *{type}
+            """.format(**typedef))
+
+        _fwrite(outfile, "\n}\n\n")
+
+        _fwrite(outfile, """\
+            // String returns a readable representation of this value
+            // (for usage defaults)
+            func (f {name}Flag) String() string {{
+                return FlagStringer(f)
+            }}
+
+            // GetName returns the name of the flag
+            func (f {name}Flag) GetName() string {{
+                return f.Name
+            }}
+
+            // {name} looks up the value of a local {name}Flag, returns
+            // {context_default} if not found
+            func (c *Context) {name}(name string) {context_type} {{
+                return lookup{name}(name, c.flagSet)
+            }}
+
+            // Global{name} looks up the value of a global {name}Flag, returns
+            // {context_default} if not found
+            func (c *Context) Global{name}(name string) {context_type} {{
+                if fs := lookupGlobalFlagSet(name, c); fs != nil {{
+                    return lookup{name}(name, fs)
+                }}
+                return {context_default}
+            }}
+
+            func lookup{name}(name string, set *flag.FlagSet) {context_type} {{
+                f := set.Lookup(name)
+                if f != nil {{
+                    parsed, err := {parser}
+                    if err != nil {{
+                        return {context_default}
+                    }}
+                    return {parser_cast}
+                }}
+                return {context_default}
+            }}
+            """.format(**typedef))
+
+
+def _write_altsrc_flag_types(outfile, types):
+    _fwrite(outfile, """\
+        package altsrc
+
+        import (
+            "gopkg.in/urfave/cli.v1"
+        )
+
+        // WARNING: This file is generated!
+
+        """)
+
+    for typedef in types:
+        _set_typedef_defaults(typedef)
+
+        _fwrite(outfile, """\
+        // {name}Flag is the flag type that wraps cli.{name}Flag to allow
+        // for other values to be specified
+        type {name}Flag struct {{
+            cli.{name}Flag
+            set *flag.FlagSet
+        }}
+
+        // New{name}Flag creates a new {name}Flag
+        func New{name}Flag(fl cli.{name}Flag) *{name}Flag {{
+            return &{name}Flag{{{name}Flag: fl, set: nil}}
+        }}
+
+        // Apply saves the flagSet for later usage calls, then calls the
+        // wrapped {name}Flag.Apply
+        func (f *{name}Flag) Apply(set *flag.FlagSet) {{
+            f.set = set
+            f.{name}Flag.Apply(set)
+        }}
+
+        // ApplyWithError saves the flagSet for later usage calls, then calls the
+        // wrapped {name}Flag.ApplyWithError
+        func (f *{name}Flag) ApplyWithError(set *flag.FlagSet) error {{
+            f.set = set
+            return f.{name}Flag.ApplyWithError(set)
+        }}
+        """.format(**typedef))
+
+
+def _fwrite(outfile, text):
+    print(textwrap.dedent(text), end='', file=outfile)
+
+
+_WRITEFUNCS = {
+    'cli': _write_cli_flag_types,
+    'altsrc': _write_altsrc_flag_types
+}
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/vendor/github.com/urfave/cli/help.go b/vendor/github.com/urfave/cli/help.go
new file mode 100644
index 00000000..57ec98d5
--- /dev/null
+++ b/vendor/github.com/urfave/cli/help.go
@@ -0,0 +1,338 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"text/tabwriter"
+	"text/template"
+)
+
+// AppHelpTemplate is the text template for the Default help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var AppHelpTemplate = `NAME:
+   {{.Name}}{{if .Usage}} - {{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Version}}{{if not .HideVersion}}
+
+VERSION:
+   {{.Version}}{{end}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if len .Authors}}
+
+AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
+   {{range $index, $author := .Authors}}{{if $index}}
+   {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
+GLOBAL OPTIONS:
+   {{range $index, $option := .VisibleFlags}}{{if $index}}
+   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+
+COPYRIGHT:
+   {{.Copyright}}{{end}}
+`
+
+// CommandHelpTemplate is the text template for the command help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var CommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{.Usage}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+
+CATEGORY:
+   {{.Category}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if .VisibleFlags}}
+
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+// SubcommandHelpTemplate is the text template for the subcommand help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var SubcommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{if .Description}}{{.Description}}{{else}}{{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{end}}{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}
+{{end}}{{if .VisibleFlags}}
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+var helpCommand = Command{
+	Name:      "help",
+	Aliases:   []string{"h"},
+	Usage:     "Shows a list of commands or help for one command",
+	ArgsUsage: "[command]",
+	Action: func(c *Context) error {
+		args := c.Args()
+		if args.Present() {
+			return ShowCommandHelp(c, args.First())
+		}
+
+		ShowAppHelp(c)
+		return nil
+	},
+}
+
+var helpSubcommand = Command{
+	Name:      "help",
+	Aliases:   []string{"h"},
+	Usage:     "Shows a list of commands or help for one command",
+	ArgsUsage: "[command]",
+	Action: func(c *Context) error {
+		args := c.Args()
+		if args.Present() {
+			return ShowCommandHelp(c, args.First())
+		}
+
+		return ShowSubcommandHelp(c)
+	},
+}
+
+// Prints help for the App or Command
+type helpPrinter func(w io.Writer, templ string, data interface{})
+
+// Prints help for the App or Command with custom template function.
+type helpPrinterCustom func(w io.Writer, templ string, data interface{}, customFunc map[string]interface{})
+
+// HelpPrinter is a function that writes the help output. If not set a default
+// is used. The function signature is:
+// func(w io.Writer, templ string, data interface{})
+var HelpPrinter helpPrinter = printHelp
+
+// HelpPrinterCustom is same as HelpPrinter but
+// takes a custom function for template function map.
+var HelpPrinterCustom helpPrinterCustom = printHelpCustom
+
+// VersionPrinter prints the version for the App
+var VersionPrinter = printVersion
+
+// ShowAppHelpAndExit - Prints the list of subcommands for the app and exits with exit code.
+func ShowAppHelpAndExit(c *Context, exitCode int) {
+	ShowAppHelp(c)
+	os.Exit(exitCode)
+}
+
+// ShowAppHelp is an action that displays the help.
+func ShowAppHelp(c *Context) (err error) {
+	if c.App.CustomAppHelpTemplate == "" {
+		HelpPrinter(c.App.Writer, AppHelpTemplate, c.App)
+		return
+	}
+	customAppData := func() map[string]interface{} {
+		if c.App.ExtraInfo == nil {
+			return nil
+		}
+		return map[string]interface{}{
+			"ExtraInfo": c.App.ExtraInfo,
+		}
+	}
+	HelpPrinterCustom(c.App.Writer, c.App.CustomAppHelpTemplate, c.App, customAppData())
+	return nil
+}
+
+// DefaultAppComplete prints the list of subcommands as the default app completion method
+func DefaultAppComplete(c *Context) {
+	for _, command := range c.App.Commands {
+		if command.Hidden {
+			continue
+		}
+		for _, name := range command.Names() {
+			fmt.Fprintln(c.App.Writer, name)
+		}
+	}
+}
+
+// ShowCommandHelpAndExit - exits with code after showing help
+func ShowCommandHelpAndExit(c *Context, command string, code int) {
+	ShowCommandHelp(c, command)
+	os.Exit(code)
+}
+
+// ShowCommandHelp prints help for the given command
+func ShowCommandHelp(ctx *Context, command string) error {
+	// show the subcommand help for a command with subcommands
+	if command == "" {
+		HelpPrinter(ctx.App.Writer, SubcommandHelpTemplate, ctx.App)
+		return nil
+	}
+
+	for _, c := range ctx.App.Commands {
+		if c.HasName(command) {
+			if c.CustomHelpTemplate != "" {
+				HelpPrinterCustom(ctx.App.Writer, c.CustomHelpTemplate, c, nil)
+			} else {
+				HelpPrinter(ctx.App.Writer, CommandHelpTemplate, c)
+			}
+			return nil
+		}
+	}
+
+	if ctx.App.CommandNotFound == nil {
+		return NewExitError(fmt.Sprintf("No help topic for '%v'", command), 3)
+	}
+
+	ctx.App.CommandNotFound(ctx, command)
+	return nil
+}
+
+// ShowSubcommandHelp prints help for the given subcommand
+func ShowSubcommandHelp(c *Context) error {
+	return ShowCommandHelp(c, c.Command.Name)
+}
+
+// ShowVersion prints the version number of the App
+func ShowVersion(c *Context) {
+	VersionPrinter(c)
+}
+
+func printVersion(c *Context) {
+	fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
+}
+
+// ShowCompletions prints the lists of commands within a given context
+func ShowCompletions(c *Context) {
+	a := c.App
+	if a != nil && a.BashComplete != nil {
+		a.BashComplete(c)
+	}
+}
+
+// ShowCommandCompletions prints the custom completions for a given command
+func ShowCommandCompletions(ctx *Context, command string) {
+	c := ctx.App.Command(command)
+	if c != nil && c.BashComplete != nil {
+		c.BashComplete(ctx)
+	}
+}
+
+func printHelpCustom(out io.Writer, templ string, data interface{}, customFunc map[string]interface{}) {
+	funcMap := template.FuncMap{
+		"join": strings.Join,
+	}
+	if customFunc != nil {
+		for key, value := range customFunc {
+			funcMap[key] = value
+		}
+	}
+
+	w := tabwriter.NewWriter(out, 1, 8, 2, ' ', 0)
+	t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
+	err := t.Execute(w, data)
+	if err != nil {
+		// If the writer is closed, t.Execute will fail, and there's nothing
+		// we can do to recover.
+		if os.Getenv("CLI_TEMPLATE_ERROR_DEBUG") != "" {
+			fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
+		}
+		return
+	}
+	w.Flush()
+}
+
+func printHelp(out io.Writer, templ string, data interface{}) {
+	printHelpCustom(out, templ, data, nil)
+}
+
+func checkVersion(c *Context) bool {
+	found := false
+	if VersionFlag.GetName() != "" {
+		eachName(VersionFlag.GetName(), func(name string) {
+			if c.GlobalBool(name) || c.Bool(name) {
+				found = true
+			}
+		})
+	}
+	return found
+}
+
+func checkHelp(c *Context) bool {
+	found := false
+	if HelpFlag.GetName() != "" {
+		eachName(HelpFlag.GetName(), func(name string) {
+			if c.GlobalBool(name) || c.Bool(name) {
+				found = true
+			}
+		})
+	}
+	return found
+}
+
+func checkCommandHelp(c *Context, name string) bool {
+	if c.Bool("h") || c.Bool("help") {
+		ShowCommandHelp(c, name)
+		return true
+	}
+
+	return false
+}
+
+func checkSubcommandHelp(c *Context) bool {
+	if c.Bool("h") || c.Bool("help") {
+		ShowSubcommandHelp(c)
+		return true
+	}
+
+	return false
+}
+
+func checkShellCompleteFlag(a *App, arguments []string) (bool, []string) {
+	if !a.EnableBashCompletion {
+		return false, arguments
+	}
+
+	pos := len(arguments) - 1
+	lastArg := arguments[pos]
+
+	if lastArg != "--"+BashCompletionFlag.GetName() {
+		return false, arguments
+	}
+
+	return true, arguments[:pos]
+}
+
+func checkCompletions(c *Context) bool {
+	if !c.shellComplete {
+		return false
+	}
+
+	if args := c.Args(); args.Present() {
+		name := args.First()
+		if cmd := c.App.Command(name); cmd != nil {
+			// let the command handle the completion
+			return false
+		}
+	}
+
+	ShowCompletions(c)
+	return true
+}
+
+func checkCommandCompletions(c *Context, name string) bool {
+	if !c.shellComplete {
+		return false
+	}
+
+	ShowCommandCompletions(c, name)
+	return true
+}
diff --git a/vendor/github.com/urfave/cli/runtests b/vendor/github.com/urfave/cli/runtests
new file mode 100755
index 00000000..ee22bdee
--- /dev/null
+++ b/vendor/github.com/urfave/cli/runtests
@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+from __future__ import print_function
+
+import argparse
+import os
+import sys
+import tempfile
+
+from subprocess import check_call, check_output
+
+
+PACKAGE_NAME = os.environ.get(
+    'CLI_PACKAGE_NAME', 'github.com/urfave/cli'
+)
+
+
+def main(sysargs=sys.argv[:]):
+    targets = {
+        'vet': _vet,
+        'test': _test,
+        'gfmrun': _gfmrun,
+        'toc': _toc,
+        'gen': _gen,
+    }
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        'target', nargs='?', choices=tuple(targets.keys()), default='test'
+    )
+    args = parser.parse_args(sysargs[1:])
+
+    targets[args.target]()
+    return 0
+
+
+def _test():
+    if check_output('go version'.split()).split()[2] < 'go1.2':
+        _run('go test -v .')
+        return
+
+    coverprofiles = []
+    for subpackage in ['', 'altsrc']:
+        coverprofile = 'cli.coverprofile'
+        if subpackage != '':
+            coverprofile = '{}.coverprofile'.format(subpackage)
+
+        coverprofiles.append(coverprofile)
+
+        _run('go test -v'.split() + [
+            '-coverprofile={}'.format(coverprofile),
+            ('{}/{}'.format(PACKAGE_NAME, subpackage)).rstrip('/')
+        ])
+
+    combined_name = _combine_coverprofiles(coverprofiles)
+    _run('go tool cover -func={}'.format(combined_name))
+    os.remove(combined_name)
+
+
+def _gfmrun():
+    go_version = check_output('go version'.split()).split()[2]
+    if go_version < 'go1.3':
+        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
+        return
+    _run(['gfmrun', '-c', str(_gfmrun_count()), '-s', 'README.md'])
+
+
+def _vet():
+    _run('go vet ./...')
+
+
+def _toc():
+    _run('node_modules/.bin/markdown-toc -i README.md')
+    _run('git diff --exit-code')
+
+
+def _gen():
+    go_version = check_output('go version'.split()).split()[2]
+    if go_version < 'go1.5':
+        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
+        return
+
+    _run('go generate ./...')
+    _run('git diff --exit-code')
+
+
+def _run(command):
+    if hasattr(command, 'split'):
+        command = command.split()
+    print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
+    check_call(command)
+
+
+def _gfmrun_count():
+    with open('README.md') as infile:
+        lines = infile.read().splitlines()
+        return len(filter(_is_go_runnable, lines))
+
+
+def _is_go_runnable(line):
+    return line.startswith('package main')
+
+
+def _combine_coverprofiles(coverprofiles):
+    combined = tempfile.NamedTemporaryFile(
+        suffix='.coverprofile', delete=False
+    )
+    combined.write('mode: set\n')
+
+    for coverprofile in coverprofiles:
+        with open(coverprofile, 'r') as infile:
+            for line in infile.readlines():
+                if not line.startswith('mode: '):
+                    combined.write(line)
+
+    combined.flush()
+    name = combined.name
+    combined.close()
+    return name
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/vendor/github.com/vektah/gqlparser/ast/definition.go b/vendor/github.com/vektah/gqlparser/ast/definition.go
index 74f4ece5..f5c8ea37 100644
--- a/vendor/github.com/vektah/gqlparser/ast/definition.go
+++ b/vendor/github.com/vektah/gqlparser/ast/definition.go
@@ -30,6 +30,7 @@ type Definition struct {
 	EnumValues  EnumValueList // enum
 
 	Position *Position `dump:"-"`
+	BuiltIn  bool      `dump:"-"`
 }
 
 func (d *Definition) IsLeafType() bool {
diff --git a/vendor/github.com/vektah/gqlparser/ast/document.go b/vendor/github.com/vektah/gqlparser/ast/document.go
index b7657d62..4672d0c0 100644
--- a/vendor/github.com/vektah/gqlparser/ast/document.go
+++ b/vendor/github.com/vektah/gqlparser/ast/document.go
@@ -32,6 +32,7 @@ type Schema struct {
 	Directives map[string]*DirectiveDefinition
 
 	PossibleTypes map[string][]*Definition
+	Implements    map[string][]*Definition
 }
 
 func (s *Schema) AddPossibleType(name string, def *Definition) {
@@ -40,17 +41,18 @@ func (s *Schema) AddPossibleType(name string, def *Definition) {
 
 // GetPossibleTypes will enumerate all the definitions for a given interface or union
 func (s *Schema) GetPossibleTypes(def *Definition) []*Definition {
-	if def.Kind == Union {
-		var defs []*Definition
-		for _, t := range def.Types {
-			defs = append(defs, s.Types[t])
-		}
-		return defs
-	}
-
 	return s.PossibleTypes[def.Name]
 }
 
+func (s *Schema) AddImplements(name string, iface *Definition) {
+	s.Implements[name] = append(s.Implements[name], iface)
+}
+
+// GetImplements returns all the interface and union definitions that the given definition satisfies
+func (s *Schema) GetImplements(def *Definition) []*Definition {
+	return s.Implements[def.Name]
+}
+
 type SchemaDefinition struct {
 	Description    string
 	Directives     DirectiveList
diff --git a/vendor/github.com/vektah/gqlparser/ast/source.go b/vendor/github.com/vektah/gqlparser/ast/source.go
index 9d44dd9c..acb07ba6 100644
--- a/vendor/github.com/vektah/gqlparser/ast/source.go
+++ b/vendor/github.com/vektah/gqlparser/ast/source.go
@@ -1,8 +1,9 @@
 package ast
 
 type Source struct {
-	Name  string
-	Input string
+	Name    string
+	Input   string
+	BuiltIn bool
 }
 
 type Position struct {
diff --git a/vendor/github.com/vektah/gqlparser/ast/value.go b/vendor/github.com/vektah/gqlparser/ast/value.go
index 3168b266..c25ef150 100644
--- a/vendor/github.com/vektah/gqlparser/ast/value.go
+++ b/vendor/github.com/vektah/gqlparser/ast/value.go
@@ -107,7 +107,7 @@ func (v *Value) String() string {
 	case ObjectValue:
 		var val []string
 		for _, elem := range v.Children {
-			val = append(val, strconv.Quote(elem.Name)+":"+elem.Value.String())
+			val = append(val, elem.Name+":"+elem.Value.String())
 		}
 		return "{" + strings.Join(val, ",") + "}"
 	default:
diff --git a/vendor/github.com/vektah/gqlparser/lexer/lexer.go b/vendor/github.com/vektah/gqlparser/lexer/lexer.go
index 3aaa7102..89687857 100644
--- a/vendor/github.com/vektah/gqlparser/lexer/lexer.go
+++ b/vendor/github.com/vektah/gqlparser/lexer/lexer.go
@@ -448,7 +448,7 @@ func (s *Lexer) readBlockString() (Token, *gqlerror.Error) {
 			s.end += 4
 			s.endRunes += 4
 		} else if r == '\r' {
-			if s.end+1 <= inputLen && s.Input[s.end+1] == '\n' {
+			if s.end+1 < inputLen && s.Input[s.end+1] == '\n' {
 				s.end++
 				s.endRunes++
 			}
diff --git a/vendor/github.com/vektah/gqlparser/parser/parser.go b/vendor/github.com/vektah/gqlparser/parser/parser.go
index f3648cb3..96e98402 100644
--- a/vendor/github.com/vektah/gqlparser/parser/parser.go
+++ b/vendor/github.com/vektah/gqlparser/parser/parser.go
@@ -82,6 +82,10 @@ func (p *parser) expect(kind lexer.Type) lexer.Token {
 }
 
 func (p *parser) skip(kind lexer.Type) bool {
+	if p.err != nil {
+		return false
+	}
+
 	tok := p.peek()
 
 	if tok.Kind != kind {
@@ -110,3 +114,23 @@ func (p *parser) many(start lexer.Type, end lexer.Type, cb func()) {
 	}
 	p.next()
 }
+
+func (p *parser) some(start lexer.Type, end lexer.Type, cb func()) {
+	hasDef := p.skip(start)
+	if !hasDef {
+		return
+	}
+
+	called := false
+	for p.peek().Kind != end && p.err == nil {
+		called = true
+		cb()
+	}
+
+	if !called {
+		p.error(p.peek(), "expected at least one definition, found %s", p.peek().Kind.String())
+		return
+	}
+
+	p.next()
+}
diff --git a/vendor/github.com/vektah/gqlparser/parser/query.go b/vendor/github.com/vektah/gqlparser/parser/query.go
index 7fecb57f..89e1e2e3 100644
--- a/vendor/github.com/vektah/gqlparser/parser/query.go
+++ b/vendor/github.com/vektah/gqlparser/parser/query.go
@@ -46,7 +46,7 @@ func (p *parser) parseOperationDefinition() *OperationDefinition {
 		return &OperationDefinition{
 			Position:     p.peekPos(),
 			Operation:    Query,
-			SelectionSet: p.parseSelectionSet(),
+			SelectionSet: p.parseRequiredSelectionSet(),
 		}
 	}
 
@@ -60,7 +60,7 @@ func (p *parser) parseOperationDefinition() *OperationDefinition {
 
 	od.VariableDefinitions = p.parseVariableDefinitions()
 	od.Directives = p.parseDirectives(false)
-	od.SelectionSet = p.parseSelectionSet()
+	od.SelectionSet = p.parseRequiredSelectionSet()
 
 	return &od
 }
@@ -109,9 +109,23 @@ func (p *parser) parseVariable() string {
 	return p.parseName()
 }
 
-func (p *parser) parseSelectionSet() SelectionSet {
+func (p *parser) parseOptionalSelectionSet() SelectionSet {
 	var selections []Selection
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
+		selections = append(selections, p.parseSelection())
+	})
+
+	return SelectionSet(selections)
+}
+
+func (p *parser) parseRequiredSelectionSet() SelectionSet {
+	if p.peek().Kind != lexer.BraceL {
+		p.error(p.peek(), "Expected %s, found %s", lexer.BraceL, p.peek().Kind.String())
+		return nil
+	}
+
+	var selections []Selection
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		selections = append(selections, p.parseSelection())
 	})
 
@@ -139,7 +153,7 @@ func (p *parser) parseField() *Field {
 	field.Arguments = p.parseArguments(false)
 	field.Directives = p.parseDirectives(false)
 	if p.peek().Kind == lexer.BraceL {
-		field.SelectionSet = p.parseSelectionSet()
+		field.SelectionSet = p.parseOptionalSelectionSet()
 	}
 
 	return &field
@@ -184,7 +198,7 @@ func (p *parser) parseFragment() Selection {
 	}
 
 	def.Directives = p.parseDirectives(false)
-	def.SelectionSet = p.parseSelectionSet()
+	def.SelectionSet = p.parseRequiredSelectionSet()
 	return &def
 }
 
@@ -200,7 +214,7 @@ func (p *parser) parseFragmentDefinition() *FragmentDefinition {
 
 	def.TypeCondition = p.parseName()
 	def.Directives = p.parseDirectives(false)
-	def.SelectionSet = p.parseSelectionSet()
+	def.SelectionSet = p.parseRequiredSelectionSet()
 	return &def
 }
 
diff --git a/vendor/github.com/vektah/gqlparser/parser/query_test.yml b/vendor/github.com/vektah/gqlparser/parser/query_test.yml
index f392eb8e..902bb15f 100644
--- a/vendor/github.com/vektah/gqlparser/parser/query_test.yml
+++ b/vendor/github.com/vektah/gqlparser/parser/query_test.yml
@@ -504,4 +504,17 @@ large queries:
                     Value: $b
                 - <Argument>
                     Name: "obj"
-                    Value: {"key":"value","block":"block string uses \"\"\""}
+                    Value: {key:"value",block:"block string uses \"\"\""}
+
+fuzzer:
+- name: 01
+  input: '{__typename{...}}'
+  error:
+    message: 'Expected {, found }'
+    locations: [{ line: 1, column: 16 }]
+
+- name: 02
+  input: '{...{__typename{...{}}}}'
+  error:
+    message: 'expected at least one definition, found }'
+    locations: [{ line: 1, column: 21 }]
diff --git a/vendor/github.com/vektah/gqlparser/parser/schema.go b/vendor/github.com/vektah/gqlparser/parser/schema.go
index f409f1f4..5689e433 100644
--- a/vendor/github.com/vektah/gqlparser/parser/schema.go
+++ b/vendor/github.com/vektah/gqlparser/parser/schema.go
@@ -10,7 +10,31 @@ func ParseSchema(source *Source) (*SchemaDocument, *gqlerror.Error) {
 	p := parser{
 		lexer: lexer.New(source),
 	}
-	return p.parseSchemaDocument(), p.err
+	ast, err := p.parseSchemaDocument(), p.err
+	if err != nil {
+		return nil, err
+	}
+
+	for _, def := range ast.Definitions {
+		def.BuiltIn = source.BuiltIn
+	}
+	for _, def := range ast.Extensions {
+		def.BuiltIn = source.BuiltIn
+	}
+
+	return ast, nil
+}
+
+func ParseSchemas(inputs ...*Source) (*SchemaDocument, *gqlerror.Error) {
+	ast := &SchemaDocument{}
+	for _, input := range inputs {
+		inputAst, err := ParseSchema(input)
+		if err != nil {
+			return nil, err
+		}
+		ast.Merge(inputAst)
+	}
+	return ast, nil
 }
 
 func (p *parser) parseSchemaDocument() *SchemaDocument {
@@ -96,7 +120,7 @@ func (p *parser) parseSchemaDefinition(description string) *SchemaDefinition {
 	def.Description = description
 	def.Directives = p.parseDirectives(true)
 
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		def.OperationTypes = append(def.OperationTypes, p.parseOperationTypeDefinition())
 	})
 	return &def
@@ -154,7 +178,7 @@ func (p *parser) parseImplementsInterfaces() []string {
 
 func (p *parser) parseFieldsDefinition() FieldList {
 	var defs FieldList
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		defs = append(defs, p.parseFieldDefinition())
 	})
 	return defs
@@ -175,7 +199,7 @@ func (p *parser) parseFieldDefinition() *FieldDefinition {
 
 func (p *parser) parseArgumentDefs() ArgumentDefinitionList {
 	var args ArgumentDefinitionList
-	p.many(lexer.ParenL, lexer.ParenR, func() {
+	p.some(lexer.ParenL, lexer.ParenR, func() {
 		args = append(args, p.parseArgumentDef())
 	})
 	return args
@@ -264,7 +288,7 @@ func (p *parser) parseEnumTypeDefinition(description string) *Definition {
 
 func (p *parser) parseEnumValuesDefinition() EnumValueList {
 	var values EnumValueList
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		values = append(values, p.parseEnumValueDefinition())
 	})
 	return values
@@ -294,7 +318,7 @@ func (p *parser) parseInputObjectTypeDefinition(description string) *Definition
 
 func (p *parser) parseInputFieldsDefinition() FieldList {
 	var values FieldList
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		values = append(values, p.parseInputValueDef())
 	})
 	return values
@@ -329,7 +353,7 @@ func (p *parser) parseSchemaExtension() *SchemaDefinition {
 	var def SchemaDefinition
 	def.Position = p.peekPos()
 	def.Directives = p.parseDirectives(true)
-	p.many(lexer.BraceL, lexer.BraceR, func() {
+	p.some(lexer.BraceL, lexer.BraceR, func() {
 		def.OperationTypes = append(def.OperationTypes, p.parseOperationTypeDefinition())
 	})
 	if len(def.Directives) == 0 && len(def.OperationTypes) == 0 {
diff --git a/vendor/github.com/vektah/gqlparser/parser/schema_test.yml b/vendor/github.com/vektah/gqlparser/parser/schema_test.yml
index c65239a5..394bd363 100644
--- a/vendor/github.com/vektah/gqlparser/parser/schema_test.yml
+++ b/vendor/github.com/vektah/gqlparser/parser/schema_test.yml
@@ -136,6 +136,12 @@ object types:
                     Name: "argTwo"
                     Type: Int
                 Type: String
+  - name: must define one or more fields
+    input: |
+      type Hello {}
+    error:
+      message: "expected at least one definition, found }"
+      locations: [{ line: 1, column: 13 }]
 
 type extensions:
   - name: Object extension
@@ -378,6 +384,12 @@ enums:
                 Name: "WO"
             - <EnumValueDefinition>
                 Name: "RLD"
+  - name: must define one or more unique enum values
+    input: |
+      enum Hello {}
+    error:
+      message: "expected at least one definition, found }"
+      locations: [{ line: 1, column: 13 }]
 
 interface:
   - name: simple
@@ -395,6 +407,12 @@ interface:
             - <FieldDefinition>
                 Name: "world"
                 Type: String
+  - name: must define one or more fields
+    input: |
+      interface Hello {}
+    error:
+      message: "expected at least one definition, found }"
+      locations: [{ line: 1, column: 18 }]
 
 unions:
   - name: simple
@@ -485,6 +503,12 @@ input object:
     error:
       message: "Expected :, found ("
       locations: [{ line: 2, column: 8 }]
+  - name: must define one or more input fields
+    input: |
+      input Hello {}
+    error:
+      message: "expected at least one definition, found }"
+      locations: [{ line: 1, column: 14 }]
 
 directives:
   - name: simple
@@ -503,3 +527,14 @@ directives:
       message: 'Unexpected Name "INCORRECT_LOCATION"'
       locations: [{ line: 1, column: 27 }]
 
+fuzzer:
+  - name: 1
+    input: "type o{d(g:["
+    error:
+      message: 'Expected Name, found <EOF>'
+      locations: [{ line: 1, column: 13 }]
+  - name: 2
+    input: "\"\"\"\r"
+    error:
+      message: 'Unexpected <Invalid>'
+      locations: [{ line: 1, column: 5 }]
diff --git a/vendor/github.com/vektah/gqlparser/validator/prelude.go b/vendor/github.com/vektah/gqlparser/validator/prelude.go
index 80ce8a21..c7a4d35b 100644
--- a/vendor/github.com/vektah/gqlparser/validator/prelude.go
+++ b/vendor/github.com/vektah/gqlparser/validator/prelude.go
@@ -2,4 +2,8 @@ package validator
 
 import "github.com/vektah/gqlparser/ast"
 
-var Prelude = &ast.Source{Name: "prelude.graphql", Input: "# This file defines all the implicitly declared types that are required by the graphql spec. It is implicitly included by calls to LoadSchema\n\n# The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.\nscalar Int\n\n# The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point).\nscalar Float\n\n# The `String`scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.\nscalar String\n\n# The `Boolean` scalar type represents ` + \"`\" + `true` + \"`\" + ` or ` + \"`\" + `false` + \"`\" + `.\nscalar Boolean\n\n# The `ID` scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as \"4\") or integer (such as 4) input value will be accepted as an ID.\nscalar ID\n\n# The @include directive may be provided for fields, fragment spreads, and inline fragments, and allows for conditional inclusion during execution as described by the if argument.\ndirective @include(if: Boolean!) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT\n\n# The @skip directive may be provided for fields, fragment spreads, and inline fragments, and allows for conditional exclusion during execution as described by the if argument.\ndirective @skip(if: Boolean!) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT\n\n# The @deprecated directive is used within the type system definition language to indicate deprecated portions of a GraphQL service’s schema, such as deprecated fields on a type or deprecated enum values.\ndirective @deprecated(reason: String = \"No longer supported\") on FIELD_DEFINITION | ENUM_VALUE\n\ntype __Schema {\n    types: [__Type!]!\n    queryType: __Type!\n    mutationType: __Type\n    subscriptionType: __Type\n    directives: [__Directive!]!\n}\n\ntype __Type {\n    kind: __TypeKind!\n    name: String\n    description: String\n\n    # OBJECT and INTERFACE only\n    fields(includeDeprecated: Boolean = false): [__Field!]\n\n    # OBJECT only\n    interfaces: [__Type!]\n\n    # INTERFACE and UNION only\n    possibleTypes: [__Type!]\n\n    # ENUM only\n    enumValues(includeDeprecated: Boolean = false): [__EnumValue!]\n\n    # INPUT_OBJECT only\n    inputFields: [__InputValue!]\n\n    # NON_NULL and LIST only\n    ofType: __Type\n}\n\ntype __Field {\n    name: String!\n    description: String\n    args: [__InputValue!]!\n    type: __Type!\n    isDeprecated: Boolean!\n    deprecationReason: String\n}\n\ntype __InputValue {\n    name: String!\n    description: String\n    type: __Type!\n    defaultValue: String\n}\n\ntype __EnumValue {\n    name: String!\n    description: String\n    isDeprecated: Boolean!\n    deprecationReason: String\n}\n\nenum __TypeKind {\n    SCALAR\n    OBJECT\n    INTERFACE\n    UNION\n    ENUM\n    INPUT_OBJECT\n    LIST\n    NON_NULL\n}\n\ntype __Directive {\n    name: String!\n    description: String\n    locations: [__DirectiveLocation!]!\n    args: [__InputValue!]!\n}\n\nenum __DirectiveLocation {\n    QUERY\n    MUTATION\n    SUBSCRIPTION\n    FIELD\n    FRAGMENT_DEFINITION\n    FRAGMENT_SPREAD\n    INLINE_FRAGMENT\n    SCHEMA\n    SCALAR\n    OBJECT\n    FIELD_DEFINITION\n    ARGUMENT_DEFINITION\n    INTERFACE\n    UNION\n    ENUM\n    ENUM_VALUE\n    INPUT_OBJECT\n    INPUT_FIELD_DEFINITION\n}\n"}
+var Prelude = &ast.Source{
+	Name:    "prelude.graphql",
+	Input:   "# This file defines all the implicitly declared types that are required by the graphql spec. It is implicitly included by calls to LoadSchema\n\n# The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.\nscalar Int\n\n# The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point).\nscalar Float\n\n# The `String`scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.\nscalar String\n\n# The `Boolean` scalar type represents ` + \"`\" + `true` + \"`\" + ` or ` + \"`\" + `false` + \"`\" + `.\nscalar Boolean\n\n# The `ID` scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as \"4\") or integer (such as 4) input value will be accepted as an ID.\nscalar ID\n\n# The @include directive may be provided for fields, fragment spreads, and inline fragments, and allows for conditional inclusion during execution as described by the if argument.\ndirective @include(if: Boolean!) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT\n\n# The @skip directive may be provided for fields, fragment spreads, and inline fragments, and allows for conditional exclusion during execution as described by the if argument.\ndirective @skip(if: Boolean!) on FIELD | FRAGMENT_SPREAD | INLINE_FRAGMENT\n\n# The @deprecated directive is used within the type system definition language to indicate deprecated portions of a GraphQL service’s schema, such as deprecated fields on a type or deprecated enum values.\ndirective @deprecated(reason: String = \"No longer supported\") on FIELD_DEFINITION | ENUM_VALUE\n\ntype __Schema {\n    types: [__Type!]!\n    queryType: __Type!\n    mutationType: __Type\n    subscriptionType: __Type\n    directives: [__Directive!]!\n}\n\ntype __Type {\n    kind: __TypeKind!\n    name: String\n    description: String\n\n    # OBJECT and INTERFACE only\n    fields(includeDeprecated: Boolean = false): [__Field!]\n\n    # OBJECT only\n    interfaces: [__Type!]\n\n    # INTERFACE and UNION only\n    possibleTypes: [__Type!]\n\n    # ENUM only\n    enumValues(includeDeprecated: Boolean = false): [__EnumValue!]\n\n    # INPUT_OBJECT only\n    inputFields: [__InputValue!]\n\n    # NON_NULL and LIST only\n    ofType: __Type\n}\n\ntype __Field {\n    name: String!\n    description: String\n    args: [__InputValue!]!\n    type: __Type!\n    isDeprecated: Boolean!\n    deprecationReason: String\n}\n\ntype __InputValue {\n    name: String!\n    description: String\n    type: __Type!\n    defaultValue: String\n}\n\ntype __EnumValue {\n    name: String!\n    description: String\n    isDeprecated: Boolean!\n    deprecationReason: String\n}\n\nenum __TypeKind {\n    SCALAR\n    OBJECT\n    INTERFACE\n    UNION\n    ENUM\n    INPUT_OBJECT\n    LIST\n    NON_NULL\n}\n\ntype __Directive {\n    name: String!\n    description: String\n    locations: [__DirectiveLocation!]!\n    args: [__InputValue!]!\n}\n\nenum __DirectiveLocation {\n    QUERY\n    MUTATION\n    SUBSCRIPTION\n    FIELD\n    FRAGMENT_DEFINITION\n    FRAGMENT_SPREAD\n    INLINE_FRAGMENT\n    SCHEMA\n    SCALAR\n    OBJECT\n    FIELD_DEFINITION\n    ARGUMENT_DEFINITION\n    INTERFACE\n    UNION\n    ENUM\n    ENUM_VALUE\n    INPUT_OBJECT\n    INPUT_FIELD_DEFINITION\n}\n",
+	BuiltIn: true,
+}
diff --git a/vendor/github.com/vektah/gqlparser/validator/rules/known_argument_names.go b/vendor/github.com/vektah/gqlparser/validator/rules/known_argument_names.go
index 83b47387..1a46431d 100644
--- a/vendor/github.com/vektah/gqlparser/validator/rules/known_argument_names.go
+++ b/vendor/github.com/vektah/gqlparser/validator/rules/known_argument_names.go
@@ -9,7 +9,7 @@ func init() {
 	AddRule("KnownArgumentNames", func(observers *Events, addError AddErrFunc) {
 		// A GraphQL field is only valid if all supplied arguments are defined by that field.
 		observers.OnField(func(walker *Walker, field *ast.Field) {
-			if field.Definition == nil {
+			if field.Definition == nil || field.ObjectDefinition == nil {
 				return
 			}
 			for _, arg := range field.Arguments {
diff --git a/vendor/github.com/vektah/gqlparser/validator/rules/overlapping_fields_can_be_merged.go b/vendor/github.com/vektah/gqlparser/validator/rules/overlapping_fields_can_be_merged.go
index 52eab3a2..bb2f1831 100644
--- a/vendor/github.com/vektah/gqlparser/validator/rules/overlapping_fields_can_be_merged.go
+++ b/vendor/github.com/vektah/gqlparser/validator/rules/overlapping_fields_can_be_merged.go
@@ -292,7 +292,11 @@ func (m *overlappingFieldsCanBeMergedManager) collectConflictsBetweenFieldsAndFr
 
 	// (E) Then collect any conflicts between the provided collection of fields
 	// and any fragment names found in the given fragment.
+	baseFragmentSpread := fragmentSpread
 	for _, fragmentSpread := range fragmentSpreads {
+		if fragmentSpread.Name == baseFragmentSpread.Name {
+			continue
+		}
 		m.collectConflictsBetweenFieldsAndFragment(conflicts, areMutuallyExclusive, fieldsMap, fragmentSpread)
 	}
 }
diff --git a/vendor/github.com/vektah/gqlparser/validator/rules/possible_fragment_spreads.go b/vendor/github.com/vektah/gqlparser/validator/rules/possible_fragment_spreads.go
index 971decbf..04611834 100644
--- a/vendor/github.com/vektah/gqlparser/validator/rules/possible_fragment_spreads.go
+++ b/vendor/github.com/vektah/gqlparser/validator/rules/possible_fragment_spreads.go
@@ -20,7 +20,7 @@ func init() {
 			case ast.Interface, ast.Union:
 				parentDefs = walker.Schema.GetPossibleTypes(parentDef)
 			default:
-				panic("unexpected type")
+				return
 			}
 
 			fragmentDefType := walker.Schema.Types[fragmentName]
diff --git a/vendor/github.com/vektah/gqlparser/validator/schema.go b/vendor/github.com/vektah/gqlparser/validator/schema.go
index 8fa18d7e..57d2022e 100644
--- a/vendor/github.com/vektah/gqlparser/validator/schema.go
+++ b/vendor/github.com/vektah/gqlparser/validator/schema.go
@@ -4,6 +4,7 @@ package validator
 
 import (
 	"strconv"
+	"strings"
 
 	. "github.com/vektah/gqlparser/ast"
 	"github.com/vektah/gqlparser/gqlerror"
@@ -11,20 +12,19 @@ import (
 )
 
 func LoadSchema(inputs ...*Source) (*Schema, *gqlerror.Error) {
-	ast := &SchemaDocument{}
-	for _, input := range inputs {
-		inputAst, err := parser.ParseSchema(input)
-		if err != nil {
-			return nil, err
-		}
-
-		ast.Merge(inputAst)
+	ast, err := parser.ParseSchemas(inputs...)
+	if err != nil {
+		return nil, err
 	}
+	return ValidateSchemaDocument(ast)
+}
 
+func ValidateSchemaDocument(ast *SchemaDocument) (*Schema, *gqlerror.Error) {
 	schema := Schema{
 		Types:         map[string]*Definition{},
 		Directives:    map[string]*DirectiveDefinition{},
 		PossibleTypes: map[string][]*Definition{},
+		Implements:    map[string][]*Definition{},
 	}
 
 	for i, def := range ast.Definitions {
@@ -32,13 +32,6 @@ func LoadSchema(inputs ...*Source) (*Schema, *gqlerror.Error) {
 			return nil, gqlerror.ErrorPosf(def.Position, "Cannot redeclare type %s.", def.Name)
 		}
 		schema.Types[def.Name] = ast.Definitions[i]
-
-		if def.Kind != Interface {
-			for _, intf := range def.Interfaces {
-				schema.AddPossibleType(intf, ast.Definitions[i])
-			}
-			schema.AddPossibleType(def.Name, ast.Definitions[i])
-		}
 	}
 
 	for _, ext := range ast.Extensions {
@@ -58,6 +51,22 @@ func LoadSchema(inputs ...*Source) (*Schema, *gqlerror.Error) {
 		def.EnumValues = append(def.EnumValues, ext.EnumValues...)
 	}
 
+	for _, def := range ast.Definitions {
+		switch def.Kind {
+		case Union:
+			for _, t := range def.Types {
+				schema.AddPossibleType(def.Name, schema.Types[t])
+				schema.AddImplements(t, def)
+			}
+		case InputObject, Object:
+			for _, intf := range def.Interfaces {
+				schema.AddPossibleType(intf, def)
+				schema.AddImplements(def.Name, schema.Types[intf])
+			}
+			schema.AddPossibleType(def.Name, def)
+		}
+	}
+
 	for i, dir := range ast.Directives {
 		if schema.Directives[dir.Name] != nil {
 			return nil, gqlerror.ErrorPosf(dir.Position, "Cannot redeclare directive %s.", dir.Name)
@@ -150,11 +159,20 @@ func LoadSchema(inputs ...*Source) (*Schema, *gqlerror.Error) {
 }
 
 func validateDirective(schema *Schema, def *DirectiveDefinition) *gqlerror.Error {
+	if err := validateName(def.Position, def.Name); err != nil {
+		// now, GraphQL spec doesn't have reserved directive name
+		return err
+	}
+
 	return validateArgs(schema, def.Arguments, def)
 }
 
 func validateDefinition(schema *Schema, def *Definition) *gqlerror.Error {
 	for _, field := range def.Fields {
+		if err := validateName(field.Position, field.Name); err != nil {
+			// now, GraphQL spec doesn't have reserved field name
+			return err
+		}
 		if err := validateTypeRef(schema, field.Type); err != nil {
 			return err
 		}
@@ -176,6 +194,37 @@ func validateDefinition(schema *Schema, def *Definition) *gqlerror.Error {
 		}
 	}
 
+	switch def.Kind {
+	case Object, Interface:
+		if len(def.Fields) == 0 {
+			return gqlerror.ErrorPosf(def.Position, "%s must define one or more fields.", def.Kind)
+		}
+	case Enum:
+		if len(def.EnumValues) == 0 {
+			return gqlerror.ErrorPosf(def.Position, "%s must define one or more unique enum values.", def.Kind)
+		}
+	case InputObject:
+		if len(def.Fields) == 0 {
+			return gqlerror.ErrorPosf(def.Position, "%s must define one or more input fields.", def.Kind)
+		}
+	}
+
+	for idx, field1 := range def.Fields {
+		for _, field2 := range def.Fields[idx+1:] {
+			if field1.Name == field2.Name {
+				return gqlerror.ErrorPosf(field2.Position, "Field %s.%s can only be defined once.", def.Name, field2.Name)
+			}
+		}
+	}
+
+	if !def.BuiltIn {
+		// GraphQL spec has reserved type names a lot!
+		err := validateName(def.Position, def.Name)
+		if err != nil {
+			return err
+		}
+	}
+
 	return validateDirectives(schema, def.Directives, nil)
 }
 
@@ -188,6 +237,10 @@ func validateTypeRef(schema *Schema, typ *Type) *gqlerror.Error {
 
 func validateArgs(schema *Schema, args ArgumentDefinitionList, currentDirective *DirectiveDefinition) *gqlerror.Error {
 	for _, arg := range args {
+		if err := validateName(arg.Position, arg.Name); err != nil {
+			// now, GraphQL spec doesn't have reserved argument name
+			return err
+		}
 		if err := validateTypeRef(schema, arg.Type); err != nil {
 			return err
 		}
@@ -200,6 +253,10 @@ func validateArgs(schema *Schema, args ArgumentDefinitionList, currentDirective
 
 func validateDirectives(schema *Schema, dirs DirectiveList, currentDirective *DirectiveDefinition) *gqlerror.Error {
 	for _, dir := range dirs {
+		if err := validateName(dir.Position, dir.Name); err != nil {
+			// now, GraphQL spec doesn't have reserved directive name
+			return err
+		}
 		if currentDirective != nil && dir.Name == currentDirective.Name {
 			return gqlerror.ErrorPosf(dir.Position, "Directive %s cannot refer to itself.", currentDirective.Name)
 		}
@@ -210,3 +267,10 @@ func validateDirectives(schema *Schema, dirs DirectiveList, currentDirective *Di
 	}
 	return nil
 }
+
+func validateName(pos *Position, name string) *gqlerror.Error {
+	if strings.HasPrefix(name, "__") {
+		return gqlerror.ErrorPosf(pos, `Name "%s" must not begin with "__", which is reserved by GraphQL introspection.`, name)
+	}
+	return nil
+}
diff --git a/vendor/github.com/vektah/gqlparser/validator/schema_test.yml b/vendor/github.com/vektah/gqlparser/validator/schema_test.yml
index 59e7145c..abc8dd7e 100644
--- a/vendor/github.com/vektah/gqlparser/validator/schema_test.yml
+++ b/vendor/github.com/vektah/gqlparser/validator/schema_test.yml
@@ -10,6 +10,84 @@ types:
     error:
       message: "Cannot redeclare type A."
       locations: [{line: 4, column: 6}]
+  - name: cannot be duplicated field at same definition 1
+    input: |
+      type A {
+        name: String
+        name: String
+      }
+    error:
+      message: "Field A.name can only be defined once."
+      locations: [{line: 3, column: 3}]
+  - name: cannot be duplicated field at same definition 2
+    input: |
+      type A {
+        name: String
+      }
+      extend type A {
+        name: String
+      }
+    error:
+      message: "Field A.name can only be defined once."
+      locations: [{line: 5, column: 3}]
+  - name: cannot be duplicated field at same definition 3
+    input: |
+      type A {
+        name: String
+      }
+      extend type A {
+        age: Int
+        age: Int
+      }
+    error:
+      message: "Field A.age can only be defined once."
+      locations: [{line: 6, column: 3}]
+
+object types:
+  - name: must define one or more fields
+    input: |
+      directive @D on OBJECT
+
+      # This pattern rejected by parser
+      # type InvalidObject1 {}
+
+      type InvalidObject2 @D
+
+      type ValidObject {
+        id: ID
+      }
+      extend type ValidObject @D
+      extend type ValidObject {
+        b: Int
+      }
+    error:
+      message: 'OBJECT must define one or more fields.'
+      locations: [{line: 6, column: 6}]
+  - name: check reserved names on type name
+    input: |
+      type __FooBar {
+        id: ID
+      }
+    error:
+      message: 'Name "__FooBar" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 1, column: 6}]
+  - name: check reserved names on type field
+    input: |
+      type FooBar {
+        __id: ID
+      }
+    error:
+      message: 'Name "__id" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 2, column: 3}]
+
+  - name: check reserved names on type field argument
+    input: |
+      type FooBar {
+        foo(__bar: ID): ID
+      }
+    error:
+      message: 'Name "__bar" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 2, column: 7}]
 
 interfaces:
   - name: must exist
@@ -42,6 +120,93 @@ interfaces:
       message: '"Object" is a non interface type OBJECT.'
       locations: [{line: 1, column: 6}]
 
+  - name: must define one or more fields
+    input: |
+      directive @D on INTERFACE
+
+      # This pattern rejected by parser
+      # interface InvalidInterface1 {}
+
+      interface InvalidInterface2 @D
+
+      interface ValidInterface {
+        id: ID
+      }
+      extend interface ValidInterface @D
+      extend interface ValidInterface {
+        b: Int
+      }
+    error:
+      message: 'INTERFACE must define one or more fields.'
+      locations: [{line: 6, column: 11}]
+  - name: check reserved names on type name
+    input: |
+      interface __FooBar {
+        id: ID
+      }
+    error:
+      message: 'Name "__FooBar" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 1, column: 11}]
+
+inputs:
+  - name: must define one or more input fields
+    input: |
+      directive @D on INPUT_OBJECT
+
+      # This pattern rejected by parser
+      # input InvalidInput1 {}
+
+      input InvalidInput2 @D
+
+      input ValidInput {
+        id: ID
+      }
+      extend input ValidInput @D
+      extend input ValidInput {
+        b: Int
+      }
+    error:
+      message: 'INPUT_OBJECT must define one or more input fields.'
+      locations: [{line: 6, column: 7}]
+  - name: check reserved names on type name
+    input: |
+      input __FooBar {
+        id: ID
+      }
+    error:
+      message: 'Name "__FooBar" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 1, column: 7}]
+
+enums:
+  - name: must define one or more unique enum values
+    input: |
+      directive @D on ENUM
+
+      # This pattern rejected by parser
+      # enum InvalidEmum1 {}
+
+      enum InvalidEnum2 @D
+
+      enum ValidEnum {
+        FOO
+      }
+      extend enum ValidEnum @D
+      extend enum ValidEnum {
+        BAR
+      }
+    error:
+      message: 'ENUM must define one or more unique enum values.'
+      locations: [{line: 6, column: 6}]
+  - name: check reserved names on type name
+    input: |
+      enum __FooBar {
+        A
+        B
+      }
+    error:
+      message: 'Name "__FooBar" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 1, column: 6}]
+
 type extensions:
   - name: cannot extend non existant types
     input: |
@@ -86,6 +251,12 @@ directives:
     error:
       message: "Directive A cannot refer to itself."
       locations: [{line: 1, column: 25}]
+  - name: check reserved names on type name
+    input: |
+      directive @__A on FIELD_DEFINITION
+    error:
+      message: 'Name "__A" must not begin with "__", which is reserved by GraphQL introspection.'
+      locations: [{line: 1, column: 12}]
 
 entry points:
   - name: multiple schema entry points
diff --git a/vendor/github.com/vektah/gqlparser/validator/vars.go b/vendor/github.com/vektah/gqlparser/validator/vars.go
index 0743f5cc..aaf3a0d1 100644
--- a/vendor/github.com/vektah/gqlparser/validator/vars.go
+++ b/vendor/github.com/vektah/gqlparser/validator/vars.go
@@ -73,12 +73,19 @@ type varValidator struct {
 }
 
 func (v *varValidator) validateVarType(typ *ast.Type, val reflect.Value) *gqlerror.Error {
+	currentPath := v.path
+	resetPath := func() {
+		v.path = currentPath
+	}
+	defer resetPath()
+
 	if typ.Elem != nil {
 		if val.Kind() != reflect.Slice {
 			return gqlerror.ErrorPathf(v.path, "must be an array")
 		}
 
 		for i := 0; i < val.Len(); i++ {
+			resetPath()
 			v.path = append(v.path, i)
 			field := val.Index(i)
 
@@ -92,8 +99,6 @@ func (v *varValidator) validateVarType(typ *ast.Type, val reflect.Value) *gqlerr
 			if err := v.validateVarType(typ.Elem, field); err != nil {
 				return err
 			}
-
-			v.path = v.path[0 : len(v.path)-1]
 		}
 
 		return nil
@@ -150,15 +155,16 @@ func (v *varValidator) validateVarType(typ *ast.Type, val reflect.Value) *gqlerr
 		for _, name := range val.MapKeys() {
 			val.MapIndex(name)
 			fieldDef := def.Fields.ForName(name.String())
-			v.path = append(v.path, name)
+			resetPath()
+			v.path = append(v.path, name.String())
 
 			if fieldDef == nil {
 				return gqlerror.ErrorPathf(v.path, "unknown field")
 			}
-			v.path = v.path[0 : len(v.path)-1]
 		}
 
 		for _, fieldDef := range def.Fields {
+			resetPath()
 			v.path = append(v.path, fieldDef.Name)
 
 			field := val.MapIndex(reflect.ValueOf(fieldDef.Name))
@@ -184,8 +190,6 @@ func (v *varValidator) validateVarType(typ *ast.Type, val reflect.Value) *gqlerr
 			if err != nil {
 				return err
 			}
-
-			v.path = v.path[0 : len(v.path)-1]
 		}
 	default:
 		panic(fmt.Errorf("unsupported type %s", def.Kind))