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v2fly/infra/vformat/main.go

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package main
import (
"fmt"
"go/build"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
)
// 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)
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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 len(envKeyValue) == 2 && strings.TrimSpace(envKeyValue[0]) == key {
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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 Run(binary string, args []string) ([]byte, error) {
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cmd := exec.Command(binary, args...)
cmd.Env = append(cmd.Env, os.Environ()...)
output, cmdErr := cmd.CombinedOutput()
if cmdErr != nil {
return nil, cmdErr
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}
return output, nil
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}
func RunMany(binary string, args, files []string) {
fmt.Println("Processing...")
maxTasks := make(chan struct{}, runtime.NumCPU())
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for _, file := range files {
maxTasks <- struct{}{}
go func(file string) {
output, err := Run(binary, append(args, file))
if err != nil {
fmt.Println(err)
} else if len(output) > 0 {
fmt.Println(string(output))
}
<-maxTasks
}(file)
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}
}
func main() {
pwd, err := os.Getwd()
if err != nil {
fmt.Println("Can not get current working directory.")
os.Exit(1)
}
GOBIN := GetGOBIN()
binPath := os.Getenv("PATH")
pathSlice := []string{pwd, GOBIN, binPath}
binPath = strings.Join(pathSlice, string(os.PathListSeparator))
os.Setenv("PATH", binPath)
suffix := ""
if runtime.GOOS == "windows" {
suffix = ".exe"
}
gofmt := "gofmt" + suffix
goimports := "gci" + suffix
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if gofmtPath, err := exec.LookPath(gofmt); err != nil {
fmt.Println("Can not find", gofmt, "in system path or current working directory.")
os.Exit(1)
} else {
gofmt = gofmtPath
}
if goimportsPath, err := exec.LookPath(goimports); err != nil {
fmt.Println("Can not find", goimports, "in system path or current working directory.")
os.Exit(1)
} else {
goimports = goimportsPath
}
rawFilesSlice := make([]string, 0, 1000)
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walkErr := filepath.Walk("./", func(path string, info os.FileInfo, err error) error {
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, ".go") &&
!strings.HasSuffix(filename, ".pb.go") &&
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!strings.Contains(dir, filepath.Join("testing", "mocks")) &&
!strings.Contains(path, filepath.Join("main", "distro", "all", "all.go")) {
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rawFilesSlice = append(rawFilesSlice, path)
}
return nil
})
if walkErr != nil {
fmt.Println(walkErr)
os.Exit(1)
}
gofmtArgs := []string{
"-s", "-l", "-e", "-w",
}
goimportsArgs := []string{
"-w",
"-local", "github.com/v2fly/v2ray-core",
}
RunMany(gofmt, gofmtArgs, rawFilesSlice)
RunMany(goimports, goimportsArgs, rawFilesSlice)
fmt.Println("Do NOT forget to commit file changes.")
}