syncthing/script/changelog.go

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// Copyright (C) 2014 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
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// +build ignore
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package main
import (
"bytes"
"flag"
"fmt"
"log"
"os/exec"
"regexp"
)
var (
subjectIssues = regexp.MustCompile(`^([^(]+)\s+\((?:fixes|ref) ([^)]+)\)(?:[^\w])?$`)
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issueNumbers = regexp.MustCompile(`(#\d+)`)
)
func main() {
flag.Parse()
// Display changelog since the version given on the command line, or
// figure out the last release if there were no arguments.
var prevRel string
if flag.NArg() > 0 {
prevRel = flag.Arg(0)
} else {
bs, err := runError("git", "describe", "--abbrev=0", "HEAD^")
if err != nil {
log.Fatal(err)
}
prevRel = string(bs)
}
// Get the git log with subject and author nickname
bs, err := runError("git", "log", "--reverse", "--pretty=format:%s|%aN", prevRel+"..")
if err != nil {
log.Fatal(err)
}
// Split into lines
for _, line := range bytes.Split(bs, []byte{'\n'}) {
// Split into subject and author
fields := bytes.Split(line, []byte{'|'})
subj := fields[0]
author := fields[1]
// Check if subject contains a "(fixes ...)" or "(ref ...)""
if m := subjectIssues.FindSubmatch(subj); len(m) > 0 {
// Find all issue numbers
issues := issueNumbers.FindAll(m[2], -1)
// Format a changelog entry
fmt.Printf("* %s (%s, @%s)\n", m[1], bytes.Join(issues, []byte(", ")), author)
}
}
}
func runError(cmd string, args ...string) ([]byte, error) {
ecmd := exec.Command(cmd, args...)
bs, err := ecmd.CombinedOutput()
if err != nil {
return nil, err
}
return bytes.TrimSpace(bs), nil
}