rclone/bin/cross-compile.go

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// +build ignore
// Cross compile rclone - in go because I hate bash ;-)
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
"sync"
"text/template"
"time"
)
var (
// Flags
debug = flag.Bool("d", false, "Print commands instead of running them.")
parallel = flag.Int("parallel", runtime.NumCPU(), "Number of commands to run in parallel.")
copyAs = flag.String("release", "", "Make copies of the releases with this name")
gitLog = flag.String("git-log", "", "git log to include as well")
include = flag.String("include", "^.*$", "os/arch regexp to include")
exclude = flag.String("exclude", "^$", "os/arch regexp to exclude")
cgo = flag.Bool("cgo", false, "Use cgo for the build")
noClean = flag.Bool("no-clean", false, "Don't clean the build directory before running.")
tags = flag.String("tags", "", "Space separated list of build tags")
compileOnly = flag.Bool("compile-only", false, "Just build the binary, not the zip.")
)
// GOOS/GOARCH pairs we build for
var osarches = []string{
"windows/386",
"windows/amd64",
"darwin/386",
"darwin/amd64",
"linux/386",
"linux/amd64",
"linux/arm",
"linux/arm64",
"linux/mips",
"linux/mipsle",
"freebsd/386",
"freebsd/amd64",
"freebsd/arm",
"netbsd/386",
"netbsd/amd64",
"netbsd/arm",
"openbsd/386",
"openbsd/amd64",
"plan9/386",
"plan9/amd64",
"solaris/amd64",
}
// Special environment flags for a given arch
var archFlags = map[string][]string{
"386": {"GO386=387"},
"mips": {"GOMIPS=softfloat"},
"mipsle": {"GOMIPS=softfloat"},
}
// runEnv - run a shell command with env
func runEnv(args, env []string) error {
if *debug {
args = append([]string{"echo"}, args...)
}
cmd := exec.Command(args[0], args[1:]...)
if env != nil {
cmd.Env = append(os.Environ(), env...)
}
if *debug {
log.Printf("args = %v, env = %v\n", args, cmd.Env)
}
out, err := cmd.CombinedOutput()
if err != nil {
log.Print("----------------------------")
log.Printf("Failed to run %v: %v", args, err)
log.Printf("Command output was:\n%s", out)
log.Print("----------------------------")
}
return err
}
// run a shell command
func run(args ...string) {
err := runEnv(args, nil)
if err != nil {
log.Fatalf("Exiting after error: %v", err)
}
}
// chdir or die
func chdir(dir string) {
err := os.Chdir(dir)
if err != nil {
log.Fatalf("Couldn't cd into %q: %v", dir, err)
}
}
// substitute data from go template file in to file out
func substitute(inFile, outFile string, data interface{}) {
t, err := template.ParseFiles(inFile)
if err != nil {
log.Fatalf("Failed to read template file %q: %v %v", inFile, err)
}
out, err := os.Create(outFile)
if err != nil {
log.Fatalf("Failed to create output file %q: %v %v", outFile, err)
}
defer func() {
err := out.Close()
if err != nil {
log.Fatalf("Failed to close output file %q: %v %v", outFile, err)
}
}()
err = t.Execute(out, data)
if err != nil {
log.Fatalf("Failed to substitute template file %q: %v %v", inFile, err)
}
}
// build the zip package return its name
func buildZip(dir string) string {
// Now build the zip
run("cp", "-a", "../MANUAL.txt", filepath.Join(dir, "README.txt"))
run("cp", "-a", "../MANUAL.html", filepath.Join(dir, "README.html"))
run("cp", "-a", "../rclone.1", dir)
if *gitLog != "" {
run("cp", "-a", *gitLog, dir)
}
zip := dir + ".zip"
run("zip", "-r9", zip, dir)
return zip
}
// Build .deb and .rpm packages
//
// It returns a list of artifacts it has made
func buildDebAndRpm(dir, version, goarch string) []string {
// Make internal version number acceptable to .deb and .rpm
pkgVersion := version[1:]
pkgVersion = strings.Replace(pkgVersion, "β", "-beta", -1)
pkgVersion = strings.Replace(pkgVersion, "-", ".", -1)
// Make nfpm.yaml from the template
substitute("../bin/nfpm.yaml", path.Join(dir, "nfpm.yaml"), map[string]string{
"Version": pkgVersion,
"Arch": goarch,
})
// build them
var artifacts []string
for _, pkg := range []string{".deb", ".rpm"} {
artifact := dir + pkg
run("bash", "-c", "cd "+dir+" && nfpm -f nfpm.yaml pkg -t ../"+artifact)
artifacts = append(artifacts, artifact)
}
return artifacts
}
// build the binary in dir returning success or failure
func compileArch(version, goos, goarch, dir string) bool {
log.Printf("Compiling %s/%s", goos, goarch)
output := filepath.Join(dir, "rclone")
if goos == "windows" {
output += ".exe"
}
err := os.MkdirAll(dir, 0777)
if err != nil {
log.Fatalf("Failed to mkdir: %v", err)
}
args := []string{
"go", "build",
"--ldflags", "-s -X github.com/rclone/rclone/fs.Version=" + version,
"-i",
"-o", output,
"-tags", *tags,
"..",
}
env := []string{
"GOOS=" + goos,
"GOARCH=" + goarch,
}
if !*cgo {
env = append(env, "CGO_ENABLED=0")
} else {
env = append(env, "CGO_ENABLED=1")
}
if flags, ok := archFlags[goarch]; ok {
env = append(env, flags...)
}
err = runEnv(args, env)
if err != nil {
log.Printf("Error compiling %s/%s: %v", goos, goarch, err)
return false
}
if !*compileOnly {
artifacts := []string{buildZip(dir)}
// build a .deb and .rpm if appropriate
if goos == "linux" {
artifacts = append(artifacts, buildDebAndRpm(dir, version, goarch)...)
}
if *copyAs != "" {
for _, artifact := range artifacts {
run("ln", artifact, strings.Replace(artifact, "-"+version, "-"+*copyAs, 1))
}
}
// tidy up
run("rm", "-rf", dir)
}
log.Printf("Done compiling %s/%s", goos, goarch)
return true
}
func compile(version string) {
start := time.Now()
wg := new(sync.WaitGroup)
run := make(chan func(), *parallel)
for i := 0; i < *parallel; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for f := range run {
f()
}
}()
}
includeRe, err := regexp.Compile(*include)
if err != nil {
log.Fatalf("Bad -include regexp: %v", err)
}
excludeRe, err := regexp.Compile(*exclude)
if err != nil {
log.Fatalf("Bad -exclude regexp: %v", err)
}
compiled := 0
var failuresMu sync.Mutex
var failures []string
for _, osarch := range osarches {
if excludeRe.MatchString(osarch) || !includeRe.MatchString(osarch) {
continue
}
parts := strings.Split(osarch, "/")
if len(parts) != 2 {
log.Fatalf("Bad osarch %q", osarch)
}
goos, goarch := parts[0], parts[1]
userGoos := goos
if goos == "darwin" {
userGoos = "osx"
}
dir := filepath.Join("rclone-" + version + "-" + userGoos + "-" + goarch)
run <- func() {
if !compileArch(version, goos, goarch, dir) {
failuresMu.Lock()
failures = append(failures, goos+"/"+goarch)
failuresMu.Unlock()
}
}
compiled++
}
close(run)
wg.Wait()
log.Printf("Compiled %d arches in %v", compiled, time.Since(start))
if len(failures) > 0 {
sort.Strings(failures)
log.Printf("%d compile failures:\n %s\n", len(failures), strings.Join(failures, "\n "))
os.Exit(1)
}
}
func main() {
flag.Parse()
args := flag.Args()
if len(args) != 1 {
log.Fatalf("Syntax: %s <version>", os.Args[0])
}
version := args[0]
2017-05-15 10:36:55 +02:00
if !*noClean {
run("rm", "-rf", "build")
run("mkdir", "build")
}
chdir("build")
err := ioutil.WriteFile("version.txt", []byte(fmt.Sprintf("rclone %s\n", version)), 0666)
if err != nil {
log.Fatalf("Couldn't write version.txt: %v", err)
}
compile(version)
}