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@@ -9,23 +9,43 @@ import (
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"github.com/docker/docker/pkg/archive"
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)
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+// ApplyLayer parses a diff in the standard layer format from `layer`,
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+// and applies it to the directory `dest`. The stream `layer` can only be
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+// uncompressed.
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+// Returns the size in bytes of the contents of the layer.
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+func ApplyLayer(dest string, layer archive.ArchiveReader) (size int64, err error) {
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+ return applyLayerHandler(dest, layer, true)
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+}
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+
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+// ApplyUncompressedLayer parses a diff in the standard layer format from
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+// `layer`, and applies it to the directory `dest`. The stream `layer`
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+// can only be uncompressed.
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+// Returns the size in bytes of the contents of the layer.
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+func ApplyUncompressedLayer(dest string, layer archive.ArchiveReader) (int64, error) {
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+ return applyLayerHandler(dest, layer, false)
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+}
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+
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// ApplyLayer parses a diff in the standard layer format from `layer`, and
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// applies it to the directory `dest`. Returns the size in bytes of the
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// contents of the layer.
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-func ApplyLayer(dest string, layer archive.ArchiveReader) (size int64, err error) {
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+func applyLayerHandler(dest string, layer archive.ArchiveReader, decompress bool) (size int64, err error) {
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dest = filepath.Clean(dest)
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- decompressed, err := archive.DecompressStream(layer)
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- if err != nil {
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- return 0, err
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+ if decompress {
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+ decompressed, err := archive.DecompressStream(layer)
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+ if err != nil {
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+ return 0, err
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+ }
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+ defer decompressed.Close()
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+
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+ layer = decompressed
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}
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- defer decompressed.Close()
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tmpDir, err := ioutil.TempDir(os.Getenv("temp"), "temp-docker-extract")
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if err != nil {
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return 0, fmt.Errorf("ApplyLayer failed to create temp-docker-extract under %s. %s", dest, err)
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}
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- s, err := archive.UnpackLayer(dest, decompressed)
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+ s, err := archive.UnpackLayer(dest, layer)
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os.RemoveAll(tmpDir)
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if err != nil {
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return 0, fmt.Errorf("ApplyLayer %s failed UnpackLayer to %s", err, dest)
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