init

ldiff-converter/utils.go

@@ -0,0 +1,142 @@
+package main
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"ldiff-converter/pb"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func Unzip(src, dest string) error {
+	r, err := zip.OpenReader(src)
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	for _, f := range r.File {
+		fpath := filepath.Join(dest, f.Name)
+		if !strings.HasPrefix(fpath, filepath.Clean(dest)+string(os.PathSeparator)) {
+			return fmt.Errorf("illegal file path: %s", fpath)
+		}
+
+		if f.FileInfo().IsDir() {
+			if err := os.MkdirAll(fpath, f.Mode()); err != nil {
+				return err
+			}
+			continue
+		}
+
+		if err := os.MkdirAll(filepath.Dir(fpath), 0755); err != nil {
+			return err
+		}
+
+		rc, err := f.Open()
+		if err != nil {
+			return err
+		}
+
+		outFile, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
+		if err != nil {
+			rc.Close()
+			return err
+		}
+
+		_, err = io.Copy(outFile, rc)
+		rc.Close()
+		outFile.Close()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func Zip(src, dest string) error {
+	zipFile, err := os.Create(dest)
+	if err != nil {
+		return err
+	}
+	defer zipFile.Close()
+
+	zw := zip.NewWriter(zipFile)
+	defer zw.Close()
+
+	err = filepath.Walk(src, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		relPath, err := filepath.Rel(src, path)
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			if relPath == "." {
+				return nil
+			}
+			_, err := zw.Create(relPath + "/")
+			return err
+		}
+
+		fh, err := zip.FileInfoHeader(info)
+		if err != nil {
+			return err
+		}
+		fh.Name = relPath
+		fh.Method = zip.Deflate
+
+		writer, err := zw.CreateHeader(fh)
+		if err != nil {
+			return err
+		}
+
+		file, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		_, err = io.Copy(writer, file)
+		return err
+	})
+
+	return err
+}
+func MakeDiffMap(manifest *pb.ManifestProto, chunkNames []string) ([]*HDiffData, error) {
+	var hdiffFiles []*HDiffData
+
+	for _, asset := range manifest.Assets {
+		assetName := asset.AssetName
+		assetSize := asset.AssetSize
+
+		if asset.AssetData != nil {
+			for _, chunk := range asset.AssetData.Assets {
+				matched := false
+				for _, name := range chunkNames {
+					if name == chunk.ChunkFileName {
+						matched = true
+						break
+					}
+				}
+				if !matched {
+					continue
+				}
+
+				if chunk.OriginalFileSize != 0 || chunk.HdiffFileSize != assetSize {
+					hdiffFiles = append(hdiffFiles, &HDiffData{
+						SourceFileName: chunk.OriginalFilePath,
+						TargetFileName: assetName,
+						PatchFileName:  fmt.Sprintf("%s.hdiff", assetName),
+					})
+				}
+			}
+		}
+	}
+
+	return hdiffFiles, nil
+}