internal/build: improve archives

- enable compression for zip files
- don't write half-complete archives

build/ci.go

@@ -296,18 +296,20 @@ func doArchive(cmdline []string) {
 		log.Fatal("unknown archive type: ", atype)
 	}
 
-	env := build.Env()
+	var (
+		env      = build.Env()
+		base     = archiveBasename(*arch, env)
+		geth     = "geth-" + base + ext
+		alltools = "geth-alltools-" + base + ext
+	)
 	maybeSkipArchive(env)
-
-	base := archiveBasename(*arch, env)
-	if err := build.WriteArchive("geth-"+base, ext, gethArchiveFiles); err != nil {
+	if err := build.WriteArchive(geth, gethArchiveFiles); err != nil {
 		log.Fatal(err)
 	}
-	if err := build.WriteArchive("geth-alltools-"+base, ext, allToolsArchiveFiles); err != nil {
+	if err := build.WriteArchive(alltools, allToolsArchiveFiles); err != nil {
 		log.Fatal(err)
 	}
-
-	for _, archive := range []string{"geth-" + base + ext, "geth-alltools-" + base + ext} {
+	for _, archive := range []string{geth, alltools} {
 		if err := archiveUpload(archive, *upload, *signer); err != nil {
 			log.Fatal(err)
 		}
@@ -315,7 +317,6 @@ func doArchive(cmdline []string) {
 }
 
 func archiveBasename(arch string, env build.Environment) string {
-	// date := time.Now().UTC().Format("200601021504")
 	platform := runtime.GOOS + "-" + arch
 	archive := platform + "-" + build.VERSION()
 	if env.Commit != "" {

internal/build/archive.go

@@ -41,14 +41,14 @@ type Archive interface {
 	Close() error
 }
 
-func NewArchive(file *os.File) Archive {
+func NewArchive(file *os.File) (Archive, string) {
 	switch {
 	case strings.HasSuffix(file.Name(), ".zip"):
-		return NewZipArchive(file)
+		return NewZipArchive(file), strings.TrimSuffix(file.Name(), ".zip")
 	case strings.HasSuffix(file.Name(), ".tar.gz"):
-		return NewTarballArchive(file)
+		return NewTarballArchive(file), strings.TrimSuffix(file.Name(), ".tar.gz")
 	default:
-		return nil
+		return nil, ""
 	}
 }
 
@@ -74,17 +74,24 @@ func AddFile(a Archive, file string) error {
 }
 
 // WriteArchive creates an archive containing the given files.
-func WriteArchive(basename, ext string, files []string) error {
-	archfd, err := os.Create(basename + ext)
+func WriteArchive(name string, files []string) (err error) {
+	archfd, err := os.Create(name)
 	if err != nil {
 		return err
 	}
-	defer archfd.Close()
-	archive := NewArchive(archfd)
-	if archive == nil {
-		return fmt.Errorf("unknown archive extension: %s", ext)
+
+	defer func() {
+		archfd.Close()
+		// Remove the half-written archive on failure.
+		if err != nil {
+			os.Remove(name)
 		}
-	fmt.Println(basename + ext)
+	}()
+	archive, basename := NewArchive(archfd)
+	if archive == nil {
+		return fmt.Errorf("unknown archive extension")
+	}
+	fmt.Println(name)
 	if err := archive.Directory(basename); err != nil {
 		return err
 	}
@@ -118,6 +125,7 @@ func (a *ZipArchive) Header(fi os.FileInfo) (io.Writer, error) {
 		return nil, fmt.Errorf("can't make zip header: %v", err)
 	}
 	head.Name = a.dir + head.Name
+	head.Method = zip.Deflate
 	w, err := a.zipw.CreateHeader(head)
 	if err != nil {
 		return nil, fmt.Errorf("can't add zip header: %v", err)