diff_windows.go 1.1 KB

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  1. package chrootarchive
  2. import (
  3. "fmt"
  4. "io"
  5. "io/ioutil"
  6. "os"
  7. "path/filepath"
  8. "github.com/docker/docker/pkg/archive"
  9. "github.com/docker/docker/pkg/longpath"
  10. )
  11. // applyLayerHandler parses a diff in the standard layer format from `layer`, and
  12. // applies it to the directory `dest`. Returns the size in bytes of the
  13. // contents of the layer.
  14. func applyLayerHandler(dest string, layer io.Reader, options *archive.TarOptions, decompress bool) (size int64, err error) {
  15. dest = filepath.Clean(dest)
  16. // Ensure it is a Windows-style volume path
  17. dest = longpath.AddPrefix(dest)
  18. if decompress {
  19. decompressed, err := archive.DecompressStream(layer)
  20. if err != nil {
  21. return 0, err
  22. }
  23. defer decompressed.Close()
  24. layer = decompressed
  25. }
  26. tmpDir, err := ioutil.TempDir(os.Getenv("temp"), "temp-docker-extract")
  27. if err != nil {
  28. return 0, fmt.Errorf("ApplyLayer failed to create temp-docker-extract under %s. %s", dest, err)
  29. }
  30. s, err := archive.UnpackLayer(dest, layer, nil)
  31. os.RemoveAll(tmpDir)
  32. if err != nil {
  33. return 0, fmt.Errorf("ApplyLayer %s failed UnpackLayer to %s: %s", layer, dest, err)
  34. }
  35. return s, nil
  36. }