syncthing/build.go

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// Copyright (C) 2014 The Syncthing Authors.
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//
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// 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
package main
import (
"archive/tar"
"archive/zip"
"bytes"
"compress/gzip"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"os/exec"
"os/user"
"path/filepath"
"regexp"
"runtime"
"strconv"
"strings"
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"time"
)
var (
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versionRe = regexp.MustCompile(`-[0-9]{1,3}-g[0-9a-f]{5,10}`)
goarch string
goos string
noupgrade bool
version string
goVersion float64
race bool
)
const minGoVersion = 1.3
func main() {
log.SetOutput(os.Stdout)
log.SetFlags(0)
if os.Getenv("GOPATH") == "" {
cwd, err := os.Getwd()
if err != nil {
log.Fatal(err)
}
gopath := filepath.Clean(filepath.Join(cwd, "../../../../"))
log.Println("GOPATH is", gopath)
os.Setenv("GOPATH", gopath)
}
os.Setenv("PATH", fmt.Sprintf("%s%cbin%c%s", os.Getenv("GOPATH"), os.PathSeparator, os.PathListSeparator, os.Getenv("PATH")))
flag.StringVar(&goarch, "goarch", runtime.GOARCH, "GOARCH")
flag.StringVar(&goos, "goos", runtime.GOOS, "GOOS")
flag.BoolVar(&noupgrade, "no-upgrade", noupgrade, "Disable upgrade functionality")
flag.StringVar(&version, "version", getVersion(), "Set compiled in version string")
flag.BoolVar(&race, "race", race, "Use race detector")
flag.Parse()
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switch goarch {
case "386", "amd64", "arm":
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break
default:
log.Printf("Unknown goarch %q; proceed with caution!", goarch)
}
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goVersion, _ = checkRequiredGoVersion()
if flag.NArg() == 0 {
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var tags []string
if noupgrade {
tags = []string{"noupgrade"}
}
install("./cmd/...", tags)
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vet("./cmd/syncthing")
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vet("./lib/...")
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lint("./cmd/syncthing")
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lint("./lib/...")
return
}
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for _, cmd := range flag.Args() {
switch cmd {
case "setup":
setup()
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case "install":
pkg := "./cmd/..."
var tags []string
if noupgrade {
tags = []string{"noupgrade"}
}
install(pkg, tags)
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case "build":
pkg := "./cmd/syncthing"
var tags []string
if noupgrade {
tags = []string{"noupgrade"}
}
build(pkg, tags)
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case "test":
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test("./...")
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case "bench":
bench("./...")
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case "assets":
assets()
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case "xdr":
xdr()
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case "translate":
translate()
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case "transifex":
transifex()
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case "deps":
deps()
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case "tar":
buildTar()
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case "zip":
buildZip()
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case "deb":
buildDeb()
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case "clean":
clean()
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case "vet":
vet("./cmd/syncthing")
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vet("./lib/...")
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case "lint":
lint("./cmd/syncthing")
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lint("./lib/...")
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default:
log.Fatalf("Unknown command %q", cmd)
}
}
}
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func checkRequiredGoVersion() (float64, bool) {
ver := run("go", "version")
re := regexp.MustCompile(`go version go(\d+\.\d+)`)
if m := re.FindSubmatch(ver); len(m) == 2 {
vs := string(m[1])
// This is a standard go build. Verify that it's new enough.
f, err := strconv.ParseFloat(vs, 64)
if err != nil {
log.Printf("*** Couldn't parse Go version out of %q.\n*** This isn't known to work, proceed on your own risk.", vs)
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return 0, false
}
if f < minGoVersion {
log.Fatalf("*** Go version %.01f is less than required %.01f.\n*** This is known not to work, not proceeding.", f, minGoVersion)
}
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return f, true
}
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log.Printf("*** Unknown Go version %q.\n*** This isn't known to work, proceed on your own risk.", ver)
return 0, false
}
func setup() {
runPrint("go", "get", "-v", "golang.org/x/tools/cmd/cover")
runPrint("go", "get", "-v", "golang.org/x/tools/cmd/vet")
runPrint("go", "get", "-v", "golang.org/x/net/html")
runPrint("go", "get", "-v", "github.com/tools/godep")
runPrint("go", "get", "-v", "github.com/axw/gocov/gocov")
runPrint("go", "get", "-v", "github.com/AlekSi/gocov-xml")
}
func test(pkg string) {
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setBuildEnv()
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runPrint("go", "test", "-short", "-race", "-timeout", "60s", pkg)
}
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func bench(pkg string) {
setBuildEnv()
runPrint("go", "test", "-run", "NONE", "-bench", ".", pkg)
}
func install(pkg string, tags []string) {
cwd, err := os.Getwd()
if err != nil {
log.Fatal(err)
}
os.Setenv("GOBIN", filepath.Join(cwd, "bin"))
args := []string{"install", "-v", "-ldflags", ldflags()}
if len(tags) > 0 {
args = append(args, "-tags", strings.Join(tags, ","))
}
if race {
args = append(args, "-race")
}
args = append(args, pkg)
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setBuildEnv()
runPrint("go", args...)
}
func build(pkg string, tags []string) {
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binary := "syncthing"
if goos == "windows" {
binary += ".exe"
}
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rmr(binary)
args := []string{"build", "-i", "-v", "-ldflags", ldflags()}
if len(tags) > 0 {
args = append(args, "-tags", strings.Join(tags, ","))
}
if race {
args = append(args, "-race")
}
args = append(args, pkg)
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setBuildEnv()
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runPrint("go", args...)
}
func buildTar() {
name := archiveName()
var tags []string
if noupgrade {
tags = []string{"noupgrade"}
name += "-noupgrade"
}
build("./cmd/syncthing", tags)
filename := name + ".tar.gz"
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files := []archiveFile{
{src: "README.md", dst: name + "/README.txt"},
{src: "LICENSE", dst: name + "/LICENSE.txt"},
{src: "AUTHORS", dst: name + "/AUTHORS.txt"},
{src: "syncthing", dst: name + "/syncthing"},
}
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for _, file := range listFiles("etc") {
files = append(files, archiveFile{src: file, dst: name + "/" + file})
}
for _, file := range listFiles("extra") {
files = append(files, archiveFile{src: file, dst: name + "/" + filepath.Base(file)})
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}
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tarGz(filename, files)
log.Println(filename)
}
func buildZip() {
name := archiveName()
var tags []string
if noupgrade {
tags = []string{"noupgrade"}
name += "-noupgrade"
}
build("./cmd/syncthing", tags)
filename := name + ".zip"
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files := []archiveFile{
{src: "README.md", dst: name + "/README.txt"},
{src: "LICENSE", dst: name + "/LICENSE.txt"},
{src: "AUTHORS", dst: name + "/AUTHORS.txt"},
{src: "syncthing.exe", dst: name + "/syncthing.exe"},
}
for _, file := range listFiles("extra") {
files = append(files, archiveFile{src: file, dst: name + "/" + filepath.Base(file)})
}
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zipFile(filename, files)
log.Println(filename)
}
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func buildDeb() {
os.RemoveAll("deb")
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// "goarch" here is set to whatever the Debian packages expect. We correct
// "it to what we actually know how to build and keep the Debian variant
// "name in "debarch".
debarch := goarch
switch goarch {
case "i386":
goarch = "386"
case "armel", "armhf":
goarch = "arm"
}
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build("./cmd/syncthing", []string{"noupgrade"})
files := []archiveFile{
{src: "README.md", dst: "deb/usr/share/doc/syncthing/README.txt", perm: 0644},
{src: "LICENSE", dst: "deb/usr/share/doc/syncthing/LICENSE.txt", perm: 0644},
{src: "AUTHORS", dst: "deb/usr/share/doc/syncthing/AUTHORS.txt", perm: 0644},
{src: "syncthing", dst: "deb/usr/bin/syncthing", perm: 0755},
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{src: "man/syncthing.1", dst: "deb/usr/share/man/man1/syncthing.1", perm: 0644},
{src: "man/syncthing-config.5", dst: "deb/usr/share/man/man5/syncthing-config.5", perm: 0644},
{src: "man/syncthing-stignore.5", dst: "deb/usr/share/man/man5/syncthing-stignore.5", perm: 0644},
{src: "man/syncthing-device-ids.7", dst: "deb/usr/share/man/man7/syncthing-device-ids.7", perm: 0644},
{src: "man/syncthing-event-api.7", dst: "deb/usr/share/man/man7/syncthing-event-api.7", perm: 0644},
{src: "man/syncthing-faq.7", dst: "deb/usr/share/man/man7/syncthing-faq.7", perm: 0644},
{src: "man/syncthing-networking.7", dst: "deb/usr/share/man/man7/syncthing-networking.7", perm: 0644},
{src: "man/syncthing-rest-api.7", dst: "deb/usr/share/man/man7/syncthing-rest-api.7", perm: 0644},
{src: "man/syncthing-security.7", dst: "deb/usr/share/man/man7/syncthing-security.7", perm: 0644},
{src: "man/syncthing-versioning.7", dst: "deb/usr/share/man/man7/syncthing-versioning.7", perm: 0644},
{src: "etc/linux-systemd/system/syncthing@.service", dst: "deb/lib/systemd/system/syncthing@.service", perm: 0644},
{src: "etc/linux-systemd/user/syncthing.service", dst: "deb/usr/lib/systemd/user/syncthing.service", perm: 0644},
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}
for _, file := range listFiles("extra") {
files = append(files, archiveFile{src: file, dst: "deb/usr/share/doc/syncthing/" + filepath.Base(file), perm: 0644})
}
for _, af := range files {
if err := copyFile(af.src, af.dst, af.perm); err != nil {
log.Fatal(err)
}
}
control := `Package: syncthing
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Architecture: {{arch}}
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Depends: libc6
Version: {{version}}
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Maintainer: Syncthing Release Management <release@syncthing.net>
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Description: Open Source Continuous File Synchronization
Syncthing does bidirectional synchronization of files between two or
more computers.
`
changelog := `syncthing ({{version}}); urgency=medium
* Packaging of {{version}}.
-- Jakob Borg <jakob@nym.se> {{date}}
`
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control = strings.Replace(control, "{{arch}}", debarch, -1)
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control = strings.Replace(control, "{{version}}", version[1:], -1)
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changelog = strings.Replace(changelog, "{{arch}}", debarch, -1)
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changelog = strings.Replace(changelog, "{{version}}", version[1:], -1)
changelog = strings.Replace(changelog, "{{date}}", time.Now().Format(time.RFC1123), -1)
os.MkdirAll("deb/DEBIAN", 0755)
ioutil.WriteFile("deb/DEBIAN/control", []byte(control), 0644)
ioutil.WriteFile("deb/DEBIAN/compat", []byte("9\n"), 0644)
ioutil.WriteFile("deb/DEBIAN/changelog", []byte(changelog), 0644)
}
func copyFile(src, dst string, perm os.FileMode) error {
dstDir := filepath.Dir(dst)
os.MkdirAll(dstDir, 0755) // ignore error
srcFd, err := os.Open(src)
if err != nil {
return err
}
defer srcFd.Close()
dstFd, err := os.OpenFile(dst, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, perm)
if err != nil {
return err
}
defer dstFd.Close()
_, err = io.Copy(dstFd, srcFd)
return err
}
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func listFiles(dir string) []string {
var res []string
filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
if err != nil {
return err
}
if fi.Mode().IsRegular() {
res = append(res, path)
}
return nil
})
return res
}
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func setBuildEnv() {
os.Setenv("GOOS", goos)
os.Setenv("GOARCH", goarch)
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wd, err := os.Getwd()
if err != nil {
log.Println("Warning: can't determine current dir:", err)
log.Println("Build might not work as expected")
}
os.Setenv("GOPATH", fmt.Sprintf("%s%c%s", filepath.Join(wd, "Godeps", "_workspace"), os.PathListSeparator, os.Getenv("GOPATH")))
log.Println("GOPATH=" + os.Getenv("GOPATH"))
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}
func assets() {
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setBuildEnv()
runPipe("lib/auto/gui.files.go", "go", "run", "script/genassets.go", "gui")
}
func xdr() {
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runPrint("go", "generate", "./lib/discover", "./lib/db", "./lib/protocol", "./lib/relay/protocol")
}
func translate() {
os.Chdir("gui/assets/lang")
runPipe("lang-en-new.json", "go", "run", "../../../script/translate.go", "lang-en.json", "../../")
os.Remove("lang-en.json")
err := os.Rename("lang-en-new.json", "lang-en.json")
if err != nil {
log.Fatal(err)
}
os.Chdir("../../..")
}
func transifex() {
os.Chdir("gui/assets/lang")
runPrint("go", "run", "../../../script/transifexdl.go")
os.Chdir("../../..")
assets()
}
func deps() {
rmr("Godeps")
runPrint("godep", "save", "./cmd/...")
}
func clean() {
rmr("bin", "Godeps/_workspace/pkg", "Godeps/_workspace/bin")
rmr(filepath.Join(os.Getenv("GOPATH"), fmt.Sprintf("pkg/%s_%s/github.com/syncthing", goos, goarch)))
}
func ldflags() string {
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sep := ' '
if goVersion > 1.4 {
sep = '='
}
b := new(bytes.Buffer)
b.WriteString("-w")
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fmt.Fprintf(b, " -X main.Version%c%s", sep, version)
fmt.Fprintf(b, " -X main.BuildStamp%c%d", sep, buildStamp())
fmt.Fprintf(b, " -X main.BuildUser%c%s", sep, buildUser())
fmt.Fprintf(b, " -X main.BuildHost%c%s", sep, buildHost())
return b.String()
}
func rmr(paths ...string) {
for _, path := range paths {
log.Println("rm -r", path)
os.RemoveAll(path)
}
}
func getReleaseVersion() (string, error) {
fd, err := os.Open("RELEASE")
if err != nil {
return "", err
}
defer fd.Close()
bs, err := ioutil.ReadAll(fd)
if err != nil {
return "", err
}
return string(bytes.TrimSpace(bs)), nil
}
func getGitVersion() (string, error) {
v, err := runError("git", "describe", "--always", "--dirty")
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if err != nil {
return "", err
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}
v = versionRe.ReplaceAllFunc(v, func(s []byte) []byte {
s[0] = '+'
return s
})
return string(v), nil
}
func getVersion() string {
// First try for a RELEASE file,
if ver, err := getReleaseVersion(); err == nil {
return ver
}
// ... then see if we have a Git tag.
if ver, err := getGitVersion(); err == nil {
return ver
}
// This seems to be a dev build.
return "unknown-dev"
}
func buildStamp() int64 {
bs, err := runError("git", "show", "-s", "--format=%ct")
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if err != nil {
return time.Now().Unix()
}
s, _ := strconv.ParseInt(string(bs), 10, 64)
return s
}
func buildUser() string {
u, err := user.Current()
if err != nil {
return "unknown-user"
}
return strings.Replace(u.Username, " ", "-", -1)
}
func buildHost() string {
h, err := os.Hostname()
if err != nil {
return "unknown-host"
}
return h
}
func buildEnvironment() string {
if v := os.Getenv("ENVIRONMENT"); len(v) > 0 {
return v
}
return "default"
}
func buildArch() string {
os := goos
if os == "darwin" {
os = "macosx"
}
return fmt.Sprintf("%s-%s", os, goarch)
}
func archiveName() string {
return fmt.Sprintf("syncthing-%s-%s", buildArch(), version)
}
func run(cmd string, args ...string) []byte {
bs, err := runError(cmd, args...)
if err != nil {
log.Println(cmd, strings.Join(args, " "))
log.Println(string(bs))
log.Fatal(err)
}
return bytes.TrimSpace(bs)
}
func runError(cmd string, args ...string) ([]byte, error) {
ecmd := exec.Command(cmd, args...)
bs, err := ecmd.CombinedOutput()
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return bytes.TrimSpace(bs), err
}
func runPrint(cmd string, args ...string) {
log.Println(cmd, strings.Join(args, " "))
ecmd := exec.Command(cmd, args...)
ecmd.Stdout = os.Stdout
ecmd.Stderr = os.Stderr
err := ecmd.Run()
if err != nil {
log.Fatal(err)
}
}
func runPipe(file, cmd string, args ...string) {
log.Println(cmd, strings.Join(args, " "), ">", file)
fd, err := os.Create(file)
if err != nil {
log.Fatal(err)
}
ecmd := exec.Command(cmd, args...)
ecmd.Stdout = fd
ecmd.Stderr = os.Stderr
err = ecmd.Run()
if err != nil {
log.Fatal(err)
}
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fd.Close()
}
type archiveFile struct {
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src string
dst string
perm os.FileMode
}
func tarGz(out string, files []archiveFile) {
fd, err := os.Create(out)
if err != nil {
log.Fatal(err)
}
gw := gzip.NewWriter(fd)
tw := tar.NewWriter(gw)
for _, f := range files {
sf, err := os.Open(f.src)
if err != nil {
log.Fatal(err)
}
info, err := sf.Stat()
if err != nil {
log.Fatal(err)
}
h := &tar.Header{
Name: f.dst,
Size: info.Size(),
Mode: int64(info.Mode()),
ModTime: info.ModTime(),
}
err = tw.WriteHeader(h)
if err != nil {
log.Fatal(err)
}
_, err = io.Copy(tw, sf)
if err != nil {
log.Fatal(err)
}
sf.Close()
}
err = tw.Close()
if err != nil {
log.Fatal(err)
}
err = gw.Close()
if err != nil {
log.Fatal(err)
}
err = fd.Close()
if err != nil {
log.Fatal(err)
}
}
func zipFile(out string, files []archiveFile) {
fd, err := os.Create(out)
if err != nil {
log.Fatal(err)
}
zw := zip.NewWriter(fd)
for _, f := range files {
sf, err := os.Open(f.src)
if err != nil {
log.Fatal(err)
}
info, err := sf.Stat()
if err != nil {
log.Fatal(err)
}
fh, err := zip.FileInfoHeader(info)
if err != nil {
log.Fatal(err)
}
fh.Name = f.dst
fh.Method = zip.Deflate
if strings.HasSuffix(f.dst, ".txt") {
// Text file. Read it and convert line endings.
bs, err := ioutil.ReadAll(sf)
if err != nil {
log.Fatal(err)
}
bs = bytes.Replace(bs, []byte{'\n'}, []byte{'\n', '\r'}, -1)
fh.UncompressedSize = uint32(len(bs))
fh.UncompressedSize64 = uint64(len(bs))
of, err := zw.CreateHeader(fh)
if err != nil {
log.Fatal(err)
}
of.Write(bs)
} else {
// Binary file. Copy verbatim.
of, err := zw.CreateHeader(fh)
if err != nil {
log.Fatal(err)
}
_, err = io.Copy(of, sf)
if err != nil {
log.Fatal(err)
}
}
}
err = zw.Close()
if err != nil {
log.Fatal(err)
}
err = fd.Close()
if err != nil {
log.Fatal(err)
}
}
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func vet(pkg string) {
bs, err := runError("go", "vet", pkg)
if err != nil && err.Error() == "exit status 3" || bytes.Contains(bs, []byte("no such tool \"vet\"")) {
// Go said there is no go vet
log.Println(`- No go vet, no vetting. Try "go get -u golang.org/x/tools/cmd/vet".`)
return
}
falseAlarmComposites := regexp.MustCompile("composite literal uses unkeyed fields")
exitStatus := regexp.MustCompile("exit status 1")
for _, line := range bytes.Split(bs, []byte("\n")) {
if falseAlarmComposites.Match(line) || exitStatus.Match(line) {
continue
}
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if len(line) > 0 {
log.Printf("%s", line)
}
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}
}
func lint(pkg string) {
bs, err := runError("golint", pkg)
if err != nil {
log.Println(`- No golint, not linting. Try "go get -u github.com/golang/lint/golint".`)
return
}
analCommentPolicy := regexp.MustCompile(`exported (function|method|const|type|var) [^\s]+ should have comment`)
for _, line := range bytes.Split(bs, []byte("\n")) {
if analCommentPolicy.Match(line) {
continue
}
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if len(line) > 0 {
log.Printf("%s", line)
}
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}
}