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|
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)
}
}
|
