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changelog.go
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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 https://mozilla.org/MPL/2.0/.
// +build ignore
package main
import (
"bytes"
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"regexp"
"strconv"
"strings"
"github.com/mitchellh/go-wordwrap"
)
var (
subjectIssues = regexp.MustCompile(`^([^(]+)\s+\((?:fixes|ref) ([^)]+)\)(?:[^\w])?$`)
issueNumbers = regexp.MustCompile(`(#\d+)`)
)
func main() {
flag.Parse()
fmt.Printf("Resolved issues:\n\n")
// 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|%cN", 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]
committer := fields[2]
// Check if subject contains a "(fixes ...)" or "(ref ...)""
if m := subjectIssues.FindSubmatch(subj); len(m) > 0 {
subj := m[1]
issues := issueNumbers.FindAll(m[2], -1)
for _, issue := range issues {
n, err := strconv.Atoi(string(issue[1:]))
if err != nil {
continue
}
title, err := githubIssueTitle(n)
if err != nil {
fmt.Println(err)
continue
}
// Format a changelog entry
reviewed := ""
if !bytes.Equal(committer, author) {
reviewed = fmt.Sprintf(", reviewed by @%s", committer)
}
message := fmt.Sprintf("%s: %s\n\n%s (by @%s%s)\n", issue, title, subj, author, reviewed)
para := wordwrap.WrapString(message, 74)
for i, line := range strings.Split(para, "\n") {
if i == 0 {
fmt.Println("*", line)
} else {
fmt.Println(" ", line)
}
}
}
}
}
}
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
}
func githubIssueTitle(n int) (string, error) {
req, err := http.NewRequest("GET", fmt.Sprintf("https://api.github.com/repos/syncthing/syncthing/issues/%d", n), nil)
if err != nil {
return "", err
}
user, token := os.Getenv("GITHUB_USERNAME"), os.Getenv("GITHUB_TOKEN")
if user != "" && token != "" {
req.SetBasicAuth(user, token)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
bs, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
var res struct {
Title string
}
err = json.Unmarshal(bs, &res)
if err != nil {
return "", err
}
return res.Title, nil
}