diff options
Diffstat (limited to 'cmd/extract_jar_packages/extract_jar_packages.go')
-rw-r--r-- | cmd/extract_jar_packages/extract_jar_packages.go | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/cmd/extract_jar_packages/extract_jar_packages.go b/cmd/extract_jar_packages/extract_jar_packages.go new file mode 100644 index 00000000..fca308ff --- /dev/null +++ b/cmd/extract_jar_packages/extract_jar_packages.go @@ -0,0 +1,88 @@ +// Copyright 2018 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 ( + "archive/zip" + "flag" + "fmt" + "io/ioutil" + "log" + "os" + "path/filepath" + "sort" + "strings" +) + +var ( + outputFile = flag.String("o", "", "output file") + prefix = flag.String("prefix", "", "prefix for each entry in the output file") + inputFile = flag.String("i", "", "input jar or srcjar") +) + +func must(err error) { + if err != nil { + log.Fatal(err) + } +} + +func fileToPackage(file string) string { + dir := filepath.Dir(file) + return strings.Replace(dir, "/", ".", -1) +} + +func main() { + flag.Usage = func() { + fmt.Fprintln(os.Stderr, "usage: extract_jar_packages -i <input file> -o <output -file> [-prefix <prefix>]") + flag.PrintDefaults() + } + + flag.Parse() + + if *outputFile == "" || *inputFile == "" { + flag.Usage() + os.Exit(1) + } + + pkgSet := make(map[string]bool) + + reader, err := zip.OpenReader(*inputFile) + if err != nil { + log.Fatal(err) + } + defer reader.Close() + + for _, f := range reader.File { + ext := filepath.Ext(f.Name) + if ext == ".java" || ext == ".class" { + pkgSet[fileToPackage(f.Name)] = true + } + } + + var pkgs []string + for k := range pkgSet { + pkgs = append(pkgs, k) + } + sort.Strings(pkgs) + + var data []byte + for _, pkg := range pkgs { + data = append(data, *prefix...) + data = append(data, pkg...) + data = append(data, "\n"...) + } + + must(ioutil.WriteFile(*outputFile, data, 0666)) +} |