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// Copyright 2017 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 jar
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"strings"
"time"
"android/soong/third_party/zip"
)
const (
MetaDir = "META-INF/"
ManifestFile = MetaDir + "MANIFEST.MF"
ModuleInfoClass = "module-info.class"
)
var DefaultTime = time.Date(2008, 1, 1, 0, 0, 0, 0, time.UTC)
var MetaDirExtra = [2]byte{0xca, 0xfe}
// EntryNamesLess tells whether <filepathA> should precede <filepathB> in
// the order of files with a .jar
func EntryNamesLess(filepathA string, filepathB string) (less bool) {
diff := index(filepathA) - index(filepathB)
if diff == 0 {
return filepathA < filepathB
}
return diff < 0
}
// Treats trailing * as a prefix match
func patternMatch(pattern, name string) bool {
if strings.HasSuffix(pattern, "*") {
return strings.HasPrefix(name, strings.TrimSuffix(pattern, "*"))
} else {
return name == pattern
}
}
var jarOrder = []string{
MetaDir,
ManifestFile,
MetaDir + "*",
"*",
}
func index(name string) int {
for i, pattern := range jarOrder {
if patternMatch(pattern, name) {
return i
}
}
panic(fmt.Errorf("file %q did not match any pattern", name))
}
func MetaDirFileHeader() *zip.FileHeader {
dirHeader := &zip.FileHeader{
Name: MetaDir,
Extra: []byte{MetaDirExtra[1], MetaDirExtra[0], 0, 0},
}
dirHeader.SetMode(0700 | os.ModeDir)
dirHeader.SetModTime(DefaultTime)
return dirHeader
}
// Convert manifest source path to zip header and contents. If path is empty uses a default
// manifest.
func ManifestFileContents(src string) (*zip.FileHeader, []byte, error) {
b, err := manifestContents(src)
if err != nil {
return nil, nil, err
}
fh := &zip.FileHeader{
Name: ManifestFile,
Method: zip.Store,
UncompressedSize64: uint64(len(b)),
}
fh.SetMode(0700)
fh.SetModTime(DefaultTime)
return fh, b, nil
}
// Convert manifest source path to contents. If path is empty uses a default manifest.
func manifestContents(src string) ([]byte, error) {
var givenBytes []byte
var err error
if src != "" {
givenBytes, err = ioutil.ReadFile(src)
if err != nil {
return nil, err
}
}
manifestMarker := []byte("Manifest-Version:")
header := append(manifestMarker, []byte(" 1.0\nCreated-By: soong_zip\n")...)
var finalBytes []byte
if !bytes.Contains(givenBytes, manifestMarker) {
finalBytes = append(append(header, givenBytes...), byte('\n'))
} else {
finalBytes = givenBytes
}
return finalBytes, nil
}
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