143 lines
2.5 KiB
Go
143 lines
2.5 KiB
Go
package main
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import (
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"archive/zip"
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"fmt"
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"io"
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"ldiff-converter/pb"
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"os"
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"path/filepath"
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"strings"
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)
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func Unzip(src, dest string) error {
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r, err := zip.OpenReader(src)
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if err != nil {
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return err
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}
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defer r.Close()
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for _, f := range r.File {
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fpath := filepath.Join(dest, f.Name)
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if !strings.HasPrefix(fpath, filepath.Clean(dest)+string(os.PathSeparator)) {
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return fmt.Errorf("illegal file path: %s", fpath)
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}
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if f.FileInfo().IsDir() {
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if err := os.MkdirAll(fpath, f.Mode()); err != nil {
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return err
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}
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continue
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}
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if err := os.MkdirAll(filepath.Dir(fpath), 0755); err != nil {
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return err
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}
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rc, err := f.Open()
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if err != nil {
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return err
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}
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outFile, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
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if err != nil {
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rc.Close()
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return err
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}
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_, err = io.Copy(outFile, rc)
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rc.Close()
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outFile.Close()
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if err != nil {
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return err
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}
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}
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return nil
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}
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func Zip(src, dest string) error {
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zipFile, err := os.Create(dest)
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if err != nil {
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return err
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}
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defer zipFile.Close()
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zw := zip.NewWriter(zipFile)
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defer zw.Close()
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err = filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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relPath, err := filepath.Rel(src, path)
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if err != nil {
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return err
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}
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if info.IsDir() {
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if relPath == "." {
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return nil
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}
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_, err := zw.Create(relPath + "/")
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return err
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}
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fh, err := zip.FileInfoHeader(info)
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if err != nil {
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return err
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}
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fh.Name = relPath
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fh.Method = zip.Deflate
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writer, err := zw.CreateHeader(fh)
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if err != nil {
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return err
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}
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file, err := os.Open(path)
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if err != nil {
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return err
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}
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defer file.Close()
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_, err = io.Copy(writer, file)
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return err
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})
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return err
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}
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func MakeDiffMap(manifest *pb.ManifestProto, chunkNames []string) ([]*HDiffData, error) {
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var hdiffFiles []*HDiffData
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for _, asset := range manifest.Assets {
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assetName := asset.AssetName
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assetSize := asset.AssetSize
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if asset.AssetData != nil {
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for _, chunk := range asset.AssetData.Assets {
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matched := false
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for _, name := range chunkNames {
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if name == chunk.ChunkFileName {
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matched = true
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break
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}
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}
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if !matched {
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continue
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}
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if chunk.OriginalFileSize != 0 || chunk.HdiffFileSize != assetSize {
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hdiffFiles = append(hdiffFiles, &HDiffData{
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SourceFileName: chunk.OriginalFilePath,
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TargetFileName: assetName,
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PatchFileName: fmt.Sprintf("%s.hdiff", assetName),
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})
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}
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}
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}
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}
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return hdiffFiles, nil
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}
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