Xray-core/infra/vprotogen/main.go

257 lines
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Go
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package main
import (
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"flag"
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"fmt"
"go/build"
"io"
"net/http"
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"os"
"os/exec"
"path/filepath"
"regexp"
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"runtime"
"strconv"
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"strings"
)
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var directory = flag.String("pwd", "", "Working directory of Xray vprotogen.")
// envFile returns the name of the Go environment configuration file.
// Copy from https://github.com/golang/go/blob/c4f2a9788a7be04daf931ac54382fbe2cb754938/src/cmd/go/internal/cfg/cfg.go#L150-L166
func envFile() (string, error) {
if file := os.Getenv("GOENV"); file != "" {
if file == "off" {
return "", fmt.Errorf("GOENV=off")
}
return file, nil
}
dir, err := os.UserConfigDir()
if err != nil {
return "", err
}
if dir == "" {
return "", fmt.Errorf("missing user-config dir")
}
return filepath.Join(dir, "go", "env"), nil
}
// GetRuntimeEnv returns the value of runtime environment variable,
// that is set by running following command: `go env -w key=value`.
func GetRuntimeEnv(key string) (string, error) {
file, err := envFile()
if err != nil {
return "", err
}
if file == "" {
return "", fmt.Errorf("missing runtime env file")
}
var data []byte
var runtimeEnv string
data, readErr := os.ReadFile(file)
if readErr != nil {
return "", readErr
}
envStrings := strings.Split(string(data), "\n")
for _, envItem := range envStrings {
envItem = strings.TrimSuffix(envItem, "\r")
envKeyValue := strings.Split(envItem, "=")
if strings.EqualFold(strings.TrimSpace(envKeyValue[0]), key) {
runtimeEnv = strings.TrimSpace(envKeyValue[1])
}
}
return runtimeEnv, nil
}
// GetGOBIN returns GOBIN environment variable as a string. It will NOT be empty.
func GetGOBIN() string {
// The one set by user explicitly by `export GOBIN=/path` or `env GOBIN=/path command`
GOBIN := os.Getenv("GOBIN")
if GOBIN == "" {
var err error
// The one set by user by running `go env -w GOBIN=/path`
GOBIN, err = GetRuntimeEnv("GOBIN")
if err != nil {
// The default one that Golang uses
return filepath.Join(build.Default.GOPATH, "bin")
}
if GOBIN == "" {
return filepath.Join(build.Default.GOPATH, "bin")
}
return GOBIN
}
return GOBIN
}
func whichProtoc(suffix, targetedVersion string) (string, error) {
protoc := "protoc" + suffix
path, err := exec.LookPath(protoc)
if err != nil {
errStr := fmt.Sprintf(`
Command "%s" not found.
Make sure that %s is in your system path or current path.
Download %s v%s or later from https://github.com/protocolbuffers/protobuf/releases
`, protoc, protoc, protoc, targetedVersion)
return "", fmt.Errorf(errStr)
}
return path, nil
}
func getProjectProtocVersion(url string) (string, error) {
resp, err := http.Get(url)
if err != nil {
return "", fmt.Errorf("can not get the version of protobuf used in xray project")
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", fmt.Errorf("can not read from body")
}
versionRegexp := regexp.MustCompile(`\/\/\s*protoc\s*v\d+\.(\d+\.\d+)`)
matched := versionRegexp.FindStringSubmatch(string(body))
return matched[1], nil
}
func getInstalledProtocVersion(protocPath string) (string, error) {
cmd := exec.Command(protocPath, "--version")
cmd.Env = append(cmd.Env, os.Environ()...)
output, cmdErr := cmd.CombinedOutput()
if cmdErr != nil {
return "", cmdErr
}
versionRegexp := regexp.MustCompile(`protoc\s*(\d+\.\d+)`)
matched := versionRegexp.FindStringSubmatch(string(output))
return matched[1], nil
}
func parseVersion(s string, width int) int64 {
strList := strings.Split(s, ".")
format := fmt.Sprintf("%%s%%0%ds", width)
v := ""
for _, value := range strList {
v = fmt.Sprintf(format, v, value)
}
var result int64
var err error
if result, err = strconv.ParseInt(v, 10, 64); err != nil {
return 0
}
return result
}
func needToUpdate(targetedVersion, installedVersion string) bool {
vt := parseVersion(targetedVersion, 4)
vi := parseVersion(installedVersion, 4)
return vt > vi
}
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func main() {
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flag.Usage = func() {
fmt.Fprintf(flag.CommandLine.Output(), "Usage of vprotogen:\n")
flag.PrintDefaults()
}
flag.Parse()
if !filepath.IsAbs(*directory) {
pwd, wdErr := os.Getwd()
if wdErr != nil {
fmt.Println("Can not get current working directory.")
os.Exit(1)
}
*directory = filepath.Join(pwd, *directory)
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}
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pwd := *directory
GOBIN := GetGOBIN()
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binPath := os.Getenv("PATH")
pathSlice := []string{pwd, GOBIN, binPath}
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binPath = strings.Join(pathSlice, string(os.PathListSeparator))
os.Setenv("PATH", binPath)
suffix := ""
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if runtime.GOOS == "windows" {
suffix = ".exe"
}
targetedVersion, err := getProjectProtocVersion("https://raw.githubusercontent.com/xtls/xray-core/HEAD/core/config.pb.go")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
protoc, err := whichProtoc(suffix, targetedVersion)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
installedVersion, err := getInstalledProtocVersion(protoc)
if err != nil {
fmt.Println(err)
os.Exit(1)
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}
if needToUpdate(targetedVersion, installedVersion) {
fmt.Printf(`
You are using an old protobuf version, please update to v%s or later.
Download it from https://github.com/protocolbuffers/protobuf/releases
* Protobuf version used in xray project: v%s
* Protobuf version you have installed: v%s
`, targetedVersion, targetedVersion, installedVersion)
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os.Exit(1)
}
protoFilesMap := make(map[string][]string)
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walkErr := filepath.Walk(pwd, func(path string, info os.FileInfo, err error) error {
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if err != nil {
fmt.Println(err)
return err
}
if info.IsDir() {
return nil
}
dir := filepath.Dir(path)
filename := filepath.Base(path)
if strings.HasSuffix(filename, ".proto") {
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path = path[len(pwd)+1:]
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protoFilesMap[dir] = append(protoFilesMap[dir], path)
}
return nil
})
if walkErr != nil {
fmt.Println(walkErr)
os.Exit(1)
}
for _, files := range protoFilesMap {
for _, relProtoFile := range files {
args := []string{
"--go_out", pwd,
"--go_opt", "paths=source_relative",
"--go-grpc_out", pwd,
"--go-grpc_opt", "paths=source_relative",
"--plugin", "protoc-gen-go=" + filepath.Join(GOBIN, "protoc-gen-go"+suffix),
"--plugin", "protoc-gen-go-grpc=" + filepath.Join(GOBIN, "protoc-gen-go-grpc"+suffix),
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}
args = append(args, relProtoFile)
cmd := exec.Command(protoc, args...)
cmd.Env = append(cmd.Env, os.Environ()...)
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cmd.Dir = pwd
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output, cmdErr := cmd.CombinedOutput()
if len(output) > 0 {
fmt.Println(string(output))
}
if cmdErr != nil {
fmt.Println(cmdErr)
os.Exit(1)
}
}
}
}