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// Copyright 2015 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.
// Sortac sorts the AUTHORS and CONTRIBUTORS files.
//
// Usage:
//
// sortac [file...]
//
// Sortac sorts the named files in place.
// If given no arguments, it sorts standard input to standard output.
package main
import (
"bufio"
"bytes"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"golang.org/x/text/collate"
"golang.org/x/text/language"
)
func main() {
log.SetFlags(0)
log.SetPrefix("sortac: ")
flag.Parse()
args := flag.Args()
if len(args) == 0 {
os.Stdout.Write(sortAC(os.Stdin))
} else {
for _, arg := range args {
f, err := os.Open(arg)
if err != nil {
log.Fatal(err)
}
sorted := sortAC(f)
f.Close()
if err := ioutil.WriteFile(arg, sorted, 0644); err != nil {
log.Fatal(err)
}
}
}
}
func sortAC(r io.Reader) []byte {
bs := bufio.NewScanner(r)
var header []string
var lines []string
for bs.Scan() {
t := bs.Text()
lines = append(lines, t)
if t == "# Please keep the list sorted." {
header = lines
lines = nil
continue
}
}
if err := bs.Err(); err != nil {
log.Fatal(err)
}
var out bytes.Buffer
c := collate.New(language.Und, collate.Loose)
c.SortStrings(lines)
for _, l := range header {
fmt.Fprintln(&out, l)
}
for _, l := range lines {
fmt.Fprintln(&out, l)
}
return out.Bytes()
}
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