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|
package codegen
import (
"fmt"
"go/build"
"go/types"
"os"
"github.com/pkg/errors"
"golang.org/x/tools/go/loader"
)
type Build struct {
PackageName string
Objects Objects
Inputs Objects
Interfaces []*Interface
Imports []*Import
QueryRoot *Object
MutationRoot *Object
SubscriptionRoot *Object
SchemaRaw string
SchemaFilename string
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
}
type ServerBuild struct {
PackageName string
Imports []*Import
ExecPackageName string
ResolverPackageName string
}
// Create a list of models that need to be generated
func (cfg *Config) models() (*ModelBuild, error) {
namedTypes := cfg.buildNamedTypes()
progLoader := newLoader(namedTypes, true)
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)
models, err := cfg.buildModels(namedTypes, prog, imports)
if err != nil {
return nil, err
}
return &ModelBuild{
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.Import(cfg.Resolver.ImportPath())
prog, err := progLoader.Load()
if err != nil {
return nil, err
}
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)
objects, err := cfg.buildObjects(namedTypes, prog, imports)
if err != nil {
return nil, err
}
def, _ := findGoType(prog, cfg.Resolver.ImportPath(), cfg.Resolver.Type)
resolverFound := def != nil
return &ResolverBuild{
PackageName: cfg.Resolver.Package,
Imports: imports.finalize(),
Objects: objects,
ResolverType: cfg.Resolver.Type,
ResolverFound: resolverFound,
}, nil
}
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,
}
}
// bind a schema together with some code to generate a Build
func (cfg *Config) bind() (*Build, error) {
namedTypes := cfg.buildNamedTypes()
progLoader := newLoader(namedTypes, true)
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)
objects, err := cfg.buildObjects(namedTypes, prog, imports)
if err != nil {
return nil, err
}
inputs, err := cfg.buildInputs(namedTypes, prog, imports)
if err != nil {
return nil, err
}
directives, err := cfg.buildDirectives(namedTypes)
if err != nil {
return nil, err
}
b := &Build{
PackageName: cfg.Exec.Package,
Objects: objects,
Interfaces: cfg.buildInterfaces(namedTypes, prog),
Inputs: inputs,
Imports: imports.finalize(),
SchemaRaw: cfg.SchemaStr,
SchemaFilename: cfg.SchemaFilename,
Directives: directives,
}
if cfg.schema.Query != nil {
b.QueryRoot = b.Objects.ByName(cfg.schema.Query.Name)
} else {
return b, fmt.Errorf("query entry point missing")
}
if cfg.schema.Mutation != nil {
b.MutationRoot = b.Objects.ByName(cfg.schema.Mutation.Name)
}
if cfg.schema.Subscription != nil {
b.SubscriptionRoot = b.Objects.ByName(cfg.schema.Subscription.Name)
}
return b, nil
}
func (cfg *Config) validate() error {
progLoader := newLoader(cfg.buildNamedTypes(), false)
_, err := progLoader.Load()
return err
}
func newLoader(namedTypes NamedTypes, allowErrors bool) 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)
}
}
return conf
}
func resolvePkg(pkgName string) (string, error) {
cwd, _ := os.Getwd()
pkg, err := build.Default.Import(pkgName, cwd, build.FindOnly)
if err != nil {
return "", err
}
return pkg.ImportPath, nil
}
|
