Add zip2zip tool to copy zip entries from one file to another
This doesn't do any decompression / recompression, but just copies over
the already compressed contents. So it's similar to zip -U, but allows
rewriting of the paths.
The first expected usecase is to replace img_from_target_files during
the build, since it does the equivalent of this:
zip2zip -i <target-files.zip> -o <img.zip> OTA/android-info.txt:android-info.txt IMAGES/*:.
Except it decompresses and recompresses the images, which takes over a
minute instead of a few seconds.
Change-Id: I88d0df188635088783223873f78e193272dbdf1c
diff --git a/cmd/zip2zip/zip2zip.go b/cmd/zip2zip/zip2zip.go
new file mode 100644
index 0000000..8e7523f
--- /dev/null
+++ b/cmd/zip2zip/zip2zip.go
@@ -0,0 +1,128 @@
+// Copyright 2016 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "flag"
+ "fmt"
+ "os"
+ "path/filepath"
+ "strings"
+
+ "android/soong/third_party/zip"
+)
+
+var (
+ input = flag.String("i", "", "zip file to read from")
+ output = flag.String("o", "", "output file")
+)
+
+func usage() {
+ fmt.Fprintln(os.Stderr, "usage: zip2zip -i zipfile -o zipfile [filespec]...")
+ flag.PrintDefaults()
+ fmt.Fprintln(os.Stderr, " filespec:")
+ fmt.Fprintln(os.Stderr, " <name>")
+ fmt.Fprintln(os.Stderr, " <in_name>:<out_name>")
+ fmt.Fprintln(os.Stderr, " <glob>:<out_dir>/")
+ fmt.Fprintln(os.Stderr, "")
+ fmt.Fprintln(os.Stderr, "Files will be copied with their existing compression from the input zipfile to")
+ fmt.Fprintln(os.Stderr, "the output zipfile, in the order of filespec arguments")
+ os.Exit(2)
+}
+
+func main() {
+ flag.Parse()
+
+ if flag.NArg() == 0 || *input == "" || *output == "" {
+ usage()
+ }
+
+ reader, err := zip.OpenReader(*input)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(3)
+ }
+ defer reader.Close()
+
+ output, err := os.Create(*output)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(4)
+ }
+ defer output.Close()
+
+ writer := zip.NewWriter(output)
+ defer func() {
+ err := writer.Close()
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(5)
+ }
+ }()
+
+ for _, arg := range flag.Args() {
+ var input string
+ var output string
+
+ // Reserve escaping for future implementation, so make sure no
+ // one is using \ and expecting a certain behavior.
+ if strings.Contains(arg, "\\") {
+ fmt.Fprintln(os.Stderr, "\\ characters are not currently supported")
+ os.Exit(6)
+ }
+
+ args := strings.SplitN(arg, ":", 2)
+ input = args[0]
+ if len(args) == 2 {
+ output = args[1]
+ }
+
+ if strings.IndexAny(input, "*?[") >= 0 {
+ for _, file := range reader.File {
+ if match, err := filepath.Match(input, file.Name); err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(7)
+ } else if match {
+ var newFileName string
+ if output == "" {
+ newFileName = file.Name
+ } else {
+ _, name := filepath.Split(file.Name)
+ newFileName = filepath.Join(output, name)
+ }
+ err = writer.CopyFrom(file, newFileName)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(8)
+ }
+ }
+ }
+ } else {
+ if output == "" {
+ output = input
+ }
+ for _, file := range reader.File {
+ if input == file.Name {
+ err = writer.CopyFrom(file, output)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(8)
+ }
+ break
+ }
+ }
+ }
+ }
+}