forked from mystiq/dex
123 lines
3.5 KiB
Go
123 lines
3.5 KiB
Go
// Copyright 2016 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// +build ignore
|
|
|
|
// Regen.go regenerates the genproto repository.
|
|
//
|
|
// Regen.go recursively walks through each directory named by given arguments,
|
|
// looking for all .proto files. (Symlinks are not followed.)
|
|
// If the pkg_prefix flag is not an empty string,
|
|
// any proto file without `go_package` option
|
|
// or whose option does not begin with the prefix is ignored.
|
|
// Protoc is executed on remaining files,
|
|
// one invocation per set of files declaring the same Go package.
|
|
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"log"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
var goPkgOptRe = regexp.MustCompile(`(?m)^option go_package = (.*);`)
|
|
|
|
func usage() {
|
|
fmt.Fprintln(os.Stderr, `usage: go run regen.go -go_out=path/to/output [-pkg_prefix=pkg/prefix] roots...
|
|
|
|
Most users will not need to run this file directly.
|
|
To regenerate this repository, run regen.sh instead.`)
|
|
flag.PrintDefaults()
|
|
}
|
|
|
|
func main() {
|
|
goOutDir := flag.String("go_out", "", "go_out argument to pass to protoc-gen-go")
|
|
pkgPrefix := flag.String("pkg_prefix", "", "only include proto files with go_package starting with this prefix")
|
|
flag.Usage = usage
|
|
flag.Parse()
|
|
|
|
if *goOutDir == "" {
|
|
log.Fatal("need go_out flag")
|
|
}
|
|
|
|
pkgFiles := make(map[string][]string)
|
|
walkFn := func(path string, info os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !info.Mode().IsRegular() || !strings.HasSuffix(path, ".proto") {
|
|
return nil
|
|
}
|
|
pkg, err := goPkg(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pkgFiles[pkg] = append(pkgFiles[pkg], path)
|
|
return nil
|
|
}
|
|
for _, root := range flag.Args() {
|
|
if err := filepath.Walk(root, walkFn); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
for pkg, fnames := range pkgFiles {
|
|
if !strings.HasPrefix(pkg, *pkgPrefix) {
|
|
continue
|
|
}
|
|
if out, err := protoc(*goOutDir, flag.Args(), fnames); err != nil {
|
|
log.Fatalf("error executing protoc: %s\n%s", err, out)
|
|
}
|
|
}
|
|
}
|
|
|
|
// goPkg reports the import path declared in the given file's
|
|
// `go_package` option. If the option is missing, goPkg returns empty string.
|
|
func goPkg(fname string) (string, error) {
|
|
content, err := ioutil.ReadFile(fname)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
var pkgName string
|
|
if match := goPkgOptRe.FindSubmatch(content); len(match) > 0 {
|
|
pn, err := strconv.Unquote(string(match[1]))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
pkgName = pn
|
|
}
|
|
if p := strings.IndexRune(pkgName, ';'); p > 0 {
|
|
pkgName = pkgName[:p]
|
|
}
|
|
return pkgName, nil
|
|
}
|
|
|
|
// protoc executes the "protoc" command on files named in fnames,
|
|
// passing go_out and include flags specified in goOut and includes respectively.
|
|
// protoc returns combined output from stdout and stderr.
|
|
func protoc(goOut string, includes, fnames []string) ([]byte, error) {
|
|
args := []string{"--go_out=plugins=grpc:" + goOut}
|
|
for _, inc := range includes {
|
|
args = append(args, "-I", inc)
|
|
}
|
|
args = append(args, fnames...)
|
|
return exec.Command("protoc", args...).CombinedOutput()
|
|
}
|