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init.go
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init.go
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package cmd
import (
"bytes"
"fmt"
"html/template"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/beyondan/gqlgen/api"
"github.com/beyondan/gqlgen/codegen/config"
"github.com/beyondan/gqlgen/internal/code"
"github.com/beyondan/gqlgen/plugin/servergen"
"github.com/urfave/cli/v2"
)
var configTemplate = template.Must(template.New("name").Parse(
`# Where are all the schema files located? globs are supported eg src/**/*.graphqls
schema:
- graph/*.graphqls
# Where should the generated server code go?
exec:
filename: graph/generated/generated.go
package: generated
# Uncomment to enable federation
# federation:
# filename: graph/generated/federation.go
# package: generated
# Where should any generated models go?
model:
filename: graph/model/models_gen.go
package: model
# Where should the resolver implementations go?
resolver:
layout: follow-schema
dir: graph
package: graph
# Optional: turn on use ` + "`" + `gqlgen:"fieldName"` + "`" + ` tags in your models
# struct_tag: json
# Optional: turn on to use []Thing instead of []*Thing
# omit_slice_element_pointers: false
# Optional: set to speed up generation time by not performing a final validation pass.
# skip_validation: true
# gqlgen will search for any type names in the schema in these go packages
# if they match it will use them, otherwise it will generate them.
autobind:
- "{{.}}/graph/model"
# This section declares type mapping between the GraphQL and go type systems
#
# The first line in each type will be used as defaults for resolver arguments and
# modelgen, the others will be allowed when binding to fields. Configure them to
# your liking
models:
ID:
model:
- github.com/beyondan/gqlgen/graphql.ID
- github.com/beyondan/gqlgen/graphql.Int
- github.com/beyondan/gqlgen/graphql.Int64
- github.com/beyondan/gqlgen/graphql.Int32
Int:
model:
- github.com/beyondan/gqlgen/graphql.Int
- github.com/beyondan/gqlgen/graphql.Int64
- github.com/beyondan/gqlgen/graphql.Int32
`))
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.go"},
&cli.StringFlag{Name: "schema", Usage: "where to write the schema stub to", Value: "graph/schema.graphqls"},
},
Action: func(ctx *cli.Context) error {
configFilename := ctx.String("config")
serverFilename := ctx.String("server")
pkgName := code.ImportPathForDir(".")
if pkgName == "" {
return fmt.Errorf("unable to determine import path for current directory, you probably need to run go mod init first")
}
if err := initSchema(ctx.String("schema")); err != nil {
return err
}
if !configExists(configFilename) {
if err := initConfig(configFilename, pkgName); err != nil {
return err
}
}
GenerateGraphServer(serverFilename)
return nil
},
}
func GenerateGraphServer(serverFilename string) {
cfg, err := config.LoadConfigFromDefaultLocations()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
if err := api.Generate(cfg, api.AddPlugin(servergen.New(serverFilename))); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
fmt.Fprintf(os.Stdout, "Exec \"go run ./%s\" to start GraphQL server\n", serverFilename)
}
func configExists(configFilename string) bool {
var cfg *config.Config
if configFilename != "" {
cfg, _ = config.LoadConfig(configFilename)
} else {
cfg, _ = config.LoadConfigFromDefaultLocations()
}
return cfg != nil
}
func initConfig(configFilename string, pkgName string) error {
if configFilename == "" {
configFilename = "gqlgen.yml"
}
if err := os.MkdirAll(filepath.Dir(configFilename), 0755); err != nil {
return fmt.Errorf("unable to create config dir: " + err.Error())
}
var buf bytes.Buffer
if err := configTemplate.Execute(&buf, pkgName); err != nil {
panic(err)
}
if err := ioutil.WriteFile(configFilename, buf.Bytes(), 0644); err != nil {
return fmt.Errorf("unable to write cfg file: " + err.Error())
}
return nil
}
func initSchema(schemaFilename string) error {
_, err := os.Stat(schemaFilename)
if !os.IsNotExist(err) {
return nil
}
if err := os.MkdirAll(filepath.Dir(schemaFilename), 0755); err != nil {
return fmt.Errorf("unable to create schema dir: " + err.Error())
}
if err = ioutil.WriteFile(schemaFilename, []byte(strings.TrimSpace(schemaDefault)), 0644); err != nil {
return fmt.Errorf("unable to write schema file: " + err.Error())
}
return nil
}