mirror of
https://github.com/Luzifer/mondash.git
synced 2024-12-23 20:41:17 +00:00
357 lines
7.7 KiB
Go
357 lines
7.7 KiB
Go
|
// Copyright 2016 The Go Authors. All rights reserved.
|
||
|
// Use of this source code is governed by a BSD-style
|
||
|
// license that can be found in the LICENSE file.
|
||
|
|
||
|
//go:generate go build -o gotext.latest
|
||
|
//go:generate ./gotext.latest help gendocumentation
|
||
|
//go:generate rm gotext.latest
|
||
|
|
||
|
package main
|
||
|
|
||
|
import (
|
||
|
"bufio"
|
||
|
"bytes"
|
||
|
"flag"
|
||
|
"fmt"
|
||
|
"go/build"
|
||
|
"go/format"
|
||
|
"io"
|
||
|
"io/ioutil"
|
||
|
"log"
|
||
|
"os"
|
||
|
"strings"
|
||
|
"sync"
|
||
|
"text/template"
|
||
|
"unicode"
|
||
|
"unicode/utf8"
|
||
|
|
||
|
"golang.org/x/text/language"
|
||
|
"golang.org/x/tools/go/buildutil"
|
||
|
)
|
||
|
|
||
|
func init() {
|
||
|
flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsFlagDoc)
|
||
|
}
|
||
|
|
||
|
var (
|
||
|
dir = flag.String("dir", "textdata", "default subdirectory to store translation files")
|
||
|
langs = flag.String("lang", "en", "comma-separated list of languages to process")
|
||
|
)
|
||
|
|
||
|
// NOTE: the Command struct is copied from the go tool in core.
|
||
|
|
||
|
// A Command is an implementation of a go command
|
||
|
// like go build or go fix.
|
||
|
type Command struct {
|
||
|
// Run runs the command.
|
||
|
// The args are the arguments after the command name.
|
||
|
Run func(cmd *Command, args []string) error
|
||
|
|
||
|
// UsageLine is the one-line usage message.
|
||
|
// The first word in the line is taken to be the command name.
|
||
|
UsageLine string
|
||
|
|
||
|
// Short is the short description shown in the 'go help' output.
|
||
|
Short string
|
||
|
|
||
|
// Long is the long message shown in the 'go help <this-command>' output.
|
||
|
Long string
|
||
|
|
||
|
// Flag is a set of flags specific to this command.
|
||
|
Flag flag.FlagSet
|
||
|
}
|
||
|
|
||
|
// Name returns the command's name: the first word in the usage line.
|
||
|
func (c *Command) Name() string {
|
||
|
name := c.UsageLine
|
||
|
i := strings.Index(name, " ")
|
||
|
if i >= 0 {
|
||
|
name = name[:i]
|
||
|
}
|
||
|
return name
|
||
|
}
|
||
|
|
||
|
func (c *Command) Usage() {
|
||
|
fmt.Fprintf(os.Stderr, "usage: %s\n\n", c.UsageLine)
|
||
|
fmt.Fprintf(os.Stderr, "%s\n", strings.TrimSpace(c.Long))
|
||
|
os.Exit(2)
|
||
|
}
|
||
|
|
||
|
// Runnable reports whether the command can be run; otherwise
|
||
|
// it is a documentation pseudo-command such as importpath.
|
||
|
func (c *Command) Runnable() bool {
|
||
|
return c.Run != nil
|
||
|
}
|
||
|
|
||
|
// Commands lists the available commands and help topics.
|
||
|
// The order here is the order in which they are printed by 'go help'.
|
||
|
var commands = []*Command{
|
||
|
cmdExtract,
|
||
|
// TODO:
|
||
|
// - generate code from translations.
|
||
|
// - update: full-cycle update of extraction, sending, and integration
|
||
|
// - report: report of freshness of translations
|
||
|
}
|
||
|
|
||
|
var exitStatus = 0
|
||
|
var exitMu sync.Mutex
|
||
|
|
||
|
func setExitStatus(n int) {
|
||
|
exitMu.Lock()
|
||
|
if exitStatus < n {
|
||
|
exitStatus = n
|
||
|
}
|
||
|
exitMu.Unlock()
|
||
|
}
|
||
|
|
||
|
var origEnv []string
|
||
|
|
||
|
func main() {
|
||
|
flag.Usage = usage
|
||
|
flag.Parse()
|
||
|
log.SetFlags(0)
|
||
|
|
||
|
args := flag.Args()
|
||
|
if len(args) < 1 {
|
||
|
usage()
|
||
|
}
|
||
|
|
||
|
if args[0] == "help" {
|
||
|
help(args[1:])
|
||
|
return
|
||
|
}
|
||
|
|
||
|
for _, cmd := range commands {
|
||
|
if cmd.Name() == args[0] && cmd.Runnable() {
|
||
|
cmd.Flag.Usage = func() { cmd.Usage() }
|
||
|
cmd.Flag.Parse(args[1:])
|
||
|
args = cmd.Flag.Args()
|
||
|
if err := cmd.Run(cmd, args); err != nil {
|
||
|
fatalf("gotext: %v", err)
|
||
|
}
|
||
|
exit()
|
||
|
return
|
||
|
}
|
||
|
}
|
||
|
|
||
|
fmt.Fprintf(os.Stderr, "gotext: unknown subcommand %q\nRun 'go help' for usage.\n", args[0])
|
||
|
setExitStatus(2)
|
||
|
exit()
|
||
|
}
|
||
|
|
||
|
var usageTemplate = `gotext is a tool for managing text in Go source code.
|
||
|
|
||
|
Usage:
|
||
|
|
||
|
gotext command [arguments]
|
||
|
|
||
|
The commands are:
|
||
|
{{range .}}{{if .Runnable}}
|
||
|
{{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}}
|
||
|
|
||
|
Use "go help [command]" for more information about a command.
|
||
|
|
||
|
Additional help topics:
|
||
|
{{range .}}{{if not .Runnable}}
|
||
|
{{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}}
|
||
|
|
||
|
Use "gotext help [topic]" for more information about that topic.
|
||
|
|
||
|
`
|
||
|
|
||
|
var helpTemplate = `{{if .Runnable}}usage: go {{.UsageLine}}
|
||
|
|
||
|
{{end}}{{.Long | trim}}
|
||
|
`
|
||
|
|
||
|
var documentationTemplate = `{{range .}}{{if .Short}}{{.Short | capitalize}}
|
||
|
|
||
|
{{end}}{{if .Runnable}}Usage:
|
||
|
|
||
|
go {{.UsageLine}}
|
||
|
|
||
|
{{end}}{{.Long | trim}}
|
||
|
|
||
|
|
||
|
{{end}}`
|
||
|
|
||
|
// commentWriter writes a Go comment to the underlying io.Writer,
|
||
|
// using line comment form (//).
|
||
|
type commentWriter struct {
|
||
|
W io.Writer
|
||
|
wroteSlashes bool // Wrote "//" at the beginning of the current line.
|
||
|
}
|
||
|
|
||
|
func (c *commentWriter) Write(p []byte) (int, error) {
|
||
|
var n int
|
||
|
for i, b := range p {
|
||
|
if !c.wroteSlashes {
|
||
|
s := "//"
|
||
|
if b != '\n' {
|
||
|
s = "// "
|
||
|
}
|
||
|
if _, err := io.WriteString(c.W, s); err != nil {
|
||
|
return n, err
|
||
|
}
|
||
|
c.wroteSlashes = true
|
||
|
}
|
||
|
n0, err := c.W.Write(p[i : i+1])
|
||
|
n += n0
|
||
|
if err != nil {
|
||
|
return n, err
|
||
|
}
|
||
|
if b == '\n' {
|
||
|
c.wroteSlashes = false
|
||
|
}
|
||
|
}
|
||
|
return len(p), nil
|
||
|
}
|
||
|
|
||
|
// An errWriter wraps a writer, recording whether a write error occurred.
|
||
|
type errWriter struct {
|
||
|
w io.Writer
|
||
|
err error
|
||
|
}
|
||
|
|
||
|
func (w *errWriter) Write(b []byte) (int, error) {
|
||
|
n, err := w.w.Write(b)
|
||
|
if err != nil {
|
||
|
w.err = err
|
||
|
}
|
||
|
return n, err
|
||
|
}
|
||
|
|
||
|
// tmpl executes the given template text on data, writing the result to w.
|
||
|
func tmpl(w io.Writer, text string, data interface{}) {
|
||
|
t := template.New("top")
|
||
|
t.Funcs(template.FuncMap{"trim": strings.TrimSpace, "capitalize": capitalize})
|
||
|
template.Must(t.Parse(text))
|
||
|
ew := &errWriter{w: w}
|
||
|
err := t.Execute(ew, data)
|
||
|
if ew.err != nil {
|
||
|
// I/O error writing. Ignore write on closed pipe.
|
||
|
if strings.Contains(ew.err.Error(), "pipe") {
|
||
|
os.Exit(1)
|
||
|
}
|
||
|
fatalf("writing output: %v", ew.err)
|
||
|
}
|
||
|
if err != nil {
|
||
|
panic(err)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func capitalize(s string) string {
|
||
|
if s == "" {
|
||
|
return s
|
||
|
}
|
||
|
r, n := utf8.DecodeRuneInString(s)
|
||
|
return string(unicode.ToTitle(r)) + s[n:]
|
||
|
}
|
||
|
|
||
|
func printUsage(w io.Writer) {
|
||
|
bw := bufio.NewWriter(w)
|
||
|
tmpl(bw, usageTemplate, commands)
|
||
|
bw.Flush()
|
||
|
}
|
||
|
|
||
|
func usage() {
|
||
|
printUsage(os.Stderr)
|
||
|
os.Exit(2)
|
||
|
}
|
||
|
|
||
|
// help implements the 'help' command.
|
||
|
func help(args []string) {
|
||
|
if len(args) == 0 {
|
||
|
printUsage(os.Stdout)
|
||
|
// not exit 2: succeeded at 'go help'.
|
||
|
return
|
||
|
}
|
||
|
if len(args) != 1 {
|
||
|
fmt.Fprintf(os.Stderr, "usage: go help command\n\nToo many arguments given.\n")
|
||
|
os.Exit(2) // failed at 'go help'
|
||
|
}
|
||
|
|
||
|
arg := args[0]
|
||
|
|
||
|
// 'go help documentation' generates doc.go.
|
||
|
if strings.HasSuffix(arg, "documentation") {
|
||
|
w := &bytes.Buffer{}
|
||
|
|
||
|
fmt.Fprintln(w, "// Copyright 2016 The Go Authors. All rights reserved.")
|
||
|
fmt.Fprintln(w, "// Use of this source code is governed by a BSD-style")
|
||
|
fmt.Fprintln(w, "// license that can be found in the LICENSE file.")
|
||
|
fmt.Fprintln(w)
|
||
|
fmt.Fprintln(w, "// DO NOT EDIT THIS FILE. GENERATED BY go generate.")
|
||
|
fmt.Fprintln(w, "// Edit the documentation in other files and rerun go generate to generate this one.")
|
||
|
fmt.Fprintln(w)
|
||
|
buf := new(bytes.Buffer)
|
||
|
printUsage(buf)
|
||
|
usage := &Command{Long: buf.String()}
|
||
|
tmpl(&commentWriter{W: w}, documentationTemplate, append([]*Command{usage}, commands...))
|
||
|
fmt.Fprintln(w, "package main")
|
||
|
if arg == "gendocumentation" {
|
||
|
b, err := format.Source(w.Bytes())
|
||
|
if err != nil {
|
||
|
errorf("Could not format generated docs: %v\n", err)
|
||
|
}
|
||
|
if err := ioutil.WriteFile("doc.go", b, 0666); err != nil {
|
||
|
errorf("Could not create file alldocs.go: %v\n", err)
|
||
|
}
|
||
|
} else {
|
||
|
fmt.Println(w.String())
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
for _, cmd := range commands {
|
||
|
if cmd.Name() == arg {
|
||
|
tmpl(os.Stdout, helpTemplate, cmd)
|
||
|
// not exit 2: succeeded at 'go help cmd'.
|
||
|
return
|
||
|
}
|
||
|
}
|
||
|
|
||
|
fmt.Fprintf(os.Stderr, "Unknown help topic %#q. Run 'go help'.\n", arg)
|
||
|
os.Exit(2) // failed at 'go help cmd'
|
||
|
}
|
||
|
|
||
|
func getLangs() (tags []language.Tag) {
|
||
|
for _, t := range strings.Split(*langs, ",") {
|
||
|
tag, err := language.Parse(t)
|
||
|
if err != nil {
|
||
|
fatalf("gotext: could not parse language %q: %v", t, err)
|
||
|
}
|
||
|
tags = append(tags, tag)
|
||
|
}
|
||
|
return tags
|
||
|
}
|
||
|
|
||
|
var atexitFuncs []func()
|
||
|
|
||
|
func atexit(f func()) {
|
||
|
atexitFuncs = append(atexitFuncs, f)
|
||
|
}
|
||
|
|
||
|
func exit() {
|
||
|
for _, f := range atexitFuncs {
|
||
|
f()
|
||
|
}
|
||
|
os.Exit(exitStatus)
|
||
|
}
|
||
|
|
||
|
func fatalf(format string, args ...interface{}) {
|
||
|
errorf(format, args...)
|
||
|
exit()
|
||
|
}
|
||
|
|
||
|
func errorf(format string, args ...interface{}) {
|
||
|
log.Printf(format, args...)
|
||
|
setExitStatus(1)
|
||
|
}
|
||
|
|
||
|
func exitIfErrors() {
|
||
|
if exitStatus != 0 {
|
||
|
exit()
|
||
|
}
|
||
|
}
|