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Add constants for AUFS whiteout files

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Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2015-09-29 10:18:28 -07:00
parent 4c53da8f9a
commit bd780a0bb0
3 changed files with 34 additions and 11 deletions
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14
archive/diff.go
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@ -83,11 +83,11 @@ func UnpackLayer(dest string, layer Reader) (size int64, err error) {
}
// Skip AUFS metadata dirs
if strings.HasPrefix(hdr.Name, ".wh..wh.") {
if strings.HasPrefix(hdr.Name, WhiteoutMetaPrefix) {
// Regular files inside /.wh..wh.plnk can be used as hardlink targets
// We don't want this directory, but we need the files in them so that
// such hardlinks can be resolved.
if strings.HasPrefix(hdr.Name, ".wh..wh.plnk") && hdr.Typeflag == tar.TypeReg {
if strings.HasPrefix(hdr.Name, WhiteoutLinkDir) && hdr.Typeflag == tar.TypeReg {
basename := filepath.Base(hdr.Name)
aufsHardlinks[basename] = hdr
if aufsTempdir == "" {
@ -101,7 +101,7 @@ func UnpackLayer(dest string, layer Reader) (size int64, err error) {
}
}
if hdr.Name != ".wh..wh..opq" {
if hdr.Name != WhiteoutOpaqueDir {
continue
}
}
@ -117,10 +117,9 @@ func UnpackLayer(dest string, layer Reader) (size int64, err error) {
}
base := filepath.Base(path)
if strings.HasPrefix(base, ".wh.") {
originalBase := base[len(".wh."):]
if strings.HasPrefix(base, WhiteoutPrefix) {
dir := filepath.Dir(path)
if originalBase == ".wh..opq" {
if base == WhiteoutOpaqueDir {
fi, err := os.Lstat(dir)
if err != nil && !os.IsNotExist(err) {
return 0, err
@ -132,6 +131,7 @@ func UnpackLayer(dest string, layer Reader) (size int64, err error) {
return 0, err
}
} else {
originalBase := base[len(WhiteoutPrefix):]
originalPath := filepath.Join(dir, originalBase)
if err := os.RemoveAll(originalPath); err != nil {
return 0, err
@ -156,7 +156,7 @@ func UnpackLayer(dest string, layer Reader) (size int64, err error) {
// Hard links into /.wh..wh.plnk don't work, as we don't extract that directory, so
// we manually retarget these into the temporary files we extracted them into
if hdr.Typeflag == tar.TypeLink && strings.HasPrefix(filepath.Clean(hdr.Linkname), ".wh..wh.plnk") {
if hdr.Typeflag == tar.TypeLink && strings.HasPrefix(filepath.Clean(hdr.Linkname), WhiteoutLinkDir) {
linkBasename := filepath.Base(hdr.Linkname)
srcHdr = aufsHardlinks[linkBasename]
if srcHdr == nil {