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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"
"os"
"strings"
"text/scanner"
"time"
"unicode"
"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(0755 | os.ModeDir)
dirHeader.SetModTime(DefaultTime)
return dirHeader
}
// Create a manifest zip header and contents using the provided contents if any.
func ManifestFileContents(contents []byte) (*zip.FileHeader, []byte, error) {
b, err := manifestContents(contents)
if err != nil {
return nil, nil, err
}
fh := &zip.FileHeader{
Name: ManifestFile,
Method: zip.Store,
UncompressedSize64: uint64(len(b)),
}
fh.SetMode(0644)
fh.SetModTime(DefaultTime)
return fh, b, nil
}
// Create manifest contents, using the provided contents if any.
func manifestContents(contents []byte) ([]byte, error) {
manifestMarker := []byte("Manifest-Version:")
header := append(manifestMarker, []byte(" 1.0\nCreated-By: soong_zip\n")...)
var finalBytes []byte
if !bytes.Contains(contents, manifestMarker) {
finalBytes = append(append(header, contents...), byte('\n'))
} else {
finalBytes = contents
}
return finalBytes, nil
}
var javaIgnorableIdentifier = &unicode.RangeTable{
R16: []unicode.Range16{
{0x00, 0x08, 1},
{0x0e, 0x1b, 1},
{0x7f, 0x9f, 1},
},
LatinOffset: 3,
}
func javaIdentRune(ch rune, i int) bool {
if unicode.IsLetter(ch) {
return true
}
if unicode.IsDigit(ch) && i > 0 {
return true
}
if unicode.In(ch,
unicode.Nl, // letter number
unicode.Sc, // currency symbol
unicode.Pc, // connecting punctuation
) {
return true
}
if unicode.In(ch,
unicode.Cf, // format
unicode.Mc, // combining mark
unicode.Mn, // non-spacing mark
javaIgnorableIdentifier,
) && i > 0 {
return true
}
return false
}
// JavaPackage parses the package out of a java source file by looking for the package statement, or the first valid
// non-package statement, in which case it returns an empty string for the package.
func JavaPackage(r io.Reader, src string) (string, error) {
var s scanner.Scanner
var sErr error
s.Init(r)
s.Filename = src
s.Error = func(s *scanner.Scanner, msg string) {
sErr = fmt.Errorf("error parsing %q: %s", src, msg)
}
s.IsIdentRune = javaIdentRune
tok := s.Scan()
if sErr != nil {
return "", sErr
}
if tok == scanner.Ident {
switch s.TokenText() {
case "package":
// Nothing
case "import":
// File has no package statement, first keyword is an import
return "", nil
case "class", "enum", "interface":
// File has no package statement, first keyword is a type declaration
return "", nil
case "public", "protected", "private", "abstract", "static", "final", "strictfp":
// File has no package statement, first keyword is a modifier
return "", nil
case "module", "open":
// File has no package statement, first keyword is a module declaration
return "", nil
default:
return "", fmt.Errorf(`expected first token of java file to be "package", got %q`, s.TokenText())
}
} else if tok == '@' {
// File has no package statement, first token is an annotation
return "", nil
} else if tok == scanner.EOF {
// File no package statement, it has no non-whitespace non-comment tokens
return "", nil
} else {
return "", fmt.Errorf(`expected first token of java file to be "package", got %q`, s.TokenText())
}
var pkg string
for {
tok = s.Scan()
if sErr != nil {
return "", sErr
}
if tok != scanner.Ident {
return "", fmt.Errorf(`expected "package <package>;", got "package %s%s"`, pkg, s.TokenText())
}
pkg += s.TokenText()
tok = s.Scan()
if sErr != nil {
return "", sErr
}
if tok == ';' {
return pkg, nil
} else if tok == '.' {
pkg += "."
} else {
return "", fmt.Errorf(`expected "package <package>;", got "package %s%s"`, pkg, s.TokenText())
}
}
}