246 lines
6.0 KiB
Go
246 lines
6.0 KiB
Go
package main
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import (
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"fmt"
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"go/format"
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"io"
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"io/ioutil"
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"log"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"github.com/golang/protobuf/protoc-gen-go/generator"
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plugin_go "github.com/golang/protobuf/protoc-gen-go/plugin"
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ggdescriptor "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway/descriptor"
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"github.com/unistack-org/protoc-gen-micro/assets"
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pgghelpers "github.com/unistack-org/protoc-gen-micro/helpers"
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"google.golang.org/protobuf/proto"
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)
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var (
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registry *ggdescriptor.Registry // some helpers need access to registry
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)
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const (
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boolTrue = "true"
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boolFalse = "false"
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)
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func main() {
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g := generator.New()
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data, err := ioutil.ReadAll(os.Stdin)
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if err != nil {
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g.Error(err, "reading input")
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}
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if err = proto.Unmarshal(data, g.Request); err != nil {
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g.Error(err, "parsing input proto")
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}
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if len(g.Request.FileToGenerate) == 0 {
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g.Fail("no files to generate")
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}
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g.CommandLineParameters(g.Request.GetParameter())
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// Parse parameters
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var (
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templateDir = ""
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templateRepo = ""
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destinationDir = "."
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debug = false
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all = false
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singlePackageMode = false
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fileMode = false
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//components = ""
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)
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if parameter := g.Request.GetParameter(); parameter != "" {
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for _, param := range strings.Split(parameter, ",") {
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parts := strings.Split(param, "=")
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switch parts[0] {
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case "template_dir":
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templateDir = parts[1]
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case "destination_dir":
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destinationDir = parts[1]
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case "single-package-mode":
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switch strings.ToLower(parts[1]) {
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case boolTrue, "t":
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singlePackageMode = true
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case boolFalse, "f":
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default:
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log.Printf("Err: invalid value for single-package-mode: %q", parts[1])
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}
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case "debug":
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switch strings.ToLower(parts[1]) {
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case boolTrue, "t":
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debug = true
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case boolFalse, "f":
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default:
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log.Printf("Err: invalid value for debug: %q", parts[1])
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}
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case "all":
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switch strings.ToLower(parts[1]) {
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case boolTrue, "t":
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all = true
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case boolFalse, "f":
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default:
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log.Printf("Err: invalid value for debug: %q", parts[1])
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}
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case "file-mode":
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switch strings.ToLower(parts[1]) {
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case boolTrue, "t":
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fileMode = true
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case boolFalse, "f":
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default:
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log.Printf("Err: invalid value for file-mode: %q", parts[1])
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}
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case "template_repo":
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_, err := url.Parse(parts[1])
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if err != nil {
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log.Printf("Err: invalid value for template_repo: %q", parts[1])
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}
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templateRepo = parts[1]
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case "paths":
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// TODO: handle paths=source_relative
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default:
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log.Printf("Err: unknown parameter: %q", param)
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}
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}
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}
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tmplMap := make(map[string]*plugin_go.CodeGeneratorResponse_File)
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concatOrAppend := func(file *plugin_go.CodeGeneratorResponse_File) {
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if val, ok := tmplMap[file.GetName()]; ok {
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*val.Content += file.GetContent()
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} else {
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tmplMap[file.GetName()] = file
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g.Response.File = append(g.Response.File, file)
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}
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}
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if singlePackageMode {
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registry = ggdescriptor.NewRegistry()
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pgghelpers.SetRegistry(registry)
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if err = registry.Load(g.Request); err != nil {
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g.Error(err, "registry: failed to load the request")
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}
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}
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if templateDir == "" || templateRepo != "" {
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if templateDir, err = ioutil.TempDir("", "gen-*"); err != nil {
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g.Error(err, "failed to create tmp dir")
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}
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defer func() {
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if err := os.RemoveAll(templateDir); err != nil {
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g.Error(err, "failed to remove tmp dir")
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}
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}()
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if templateRepo != "" {
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if err = clone(templateRepo, templateDir); err != nil {
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g.Error(err, "failed to clone repo")
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}
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} else {
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dir, err := assets.Assets.Open("/")
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if err != nil {
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g.Error(err, "failed to open assets dir")
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}
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fi, err := dir.Readdir(-1)
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if err != nil {
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g.Error(err, "failed to get assets files")
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}
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for _, f := range fi {
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if debug {
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log.Printf("copy template %s", f.Name())
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}
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fpath := filepath.Join(templateDir, f.Name())
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if err = os.MkdirAll(filepath.Dir(fpath), os.FileMode(0755)); err != nil {
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g.Error(err, "failed to create nested dir")
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}
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if f.IsDir() {
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continue
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}
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fd, err := os.OpenFile(fpath, os.O_CREATE|os.O_TRUNC|os.O_RDWR, f.Mode())
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if err != nil {
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g.Error(err, "failed to create template file")
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}
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fs, err := assets.Assets.Open(f.Name())
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if err != nil {
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g.Error(err, "failed to open template file")
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}
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if _, err = io.Copy(fd, fs); err != nil {
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fd.Close()
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fs.Close()
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g.Error(err, "failed to copy template file")
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}
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if err = fd.Close(); err != nil {
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g.Error(err, "failed to flush template file")
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}
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if err = fs.Close(); err != nil {
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g.Error(err, "failed to flush template file")
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}
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}
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}
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}
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// Generate the encoders
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for _, file := range g.Request.GetProtoFile() {
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if all {
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if singlePackageMode {
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if _, err = registry.LookupFile(file.GetName()); err != nil {
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g.Error(err, "registry: failed to lookup file %q", file.GetName())
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}
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}
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encoder := NewGenericTemplateBasedEncoder(templateDir, file, debug, destinationDir)
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for _, tmpl := range encoder.Files() {
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concatOrAppend(tmpl)
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}
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continue
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}
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if fileMode {
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if s := file.GetService(); s != nil && len(s) > 0 {
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encoder := NewGenericTemplateBasedEncoder(templateDir, file, debug, destinationDir)
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for _, tmpl := range encoder.Files() {
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concatOrAppend(tmpl)
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}
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}
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continue
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}
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for _, service := range file.GetService() {
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encoder := NewGenericServiceTemplateBasedEncoder(templateDir, service, file, debug, destinationDir)
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for _, tmpl := range encoder.Files() {
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concatOrAppend(tmpl)
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}
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}
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}
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// Generate the protobufs
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g.GenerateAllFiles()
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for _, f := range g.Response.File {
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fdata, err := format.Source([]byte(*f.Content))
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if err != nil {
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g.Error(err, fmt.Sprintf("failed to format output: %s", *f.Content))
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}
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*f.Content = string(fdata)
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}
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data, err = proto.Marshal(g.Response)
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if err != nil {
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g.Error(err, "failed to marshal output proto")
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}
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_, err = os.Stdout.Write(data)
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if err != nil {
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g.Error(err, "failed to write output proto")
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}
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}
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