62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
package file
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import (
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"archive/tar"
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"context"
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"os"
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"time"
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"github.com/containerd/continuity/fs"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/chrootarchive"
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copy "github.com/tonistiigi/fsutil/copy"
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)
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func unpack(ctx context.Context, srcRoot string, src string, destRoot string, dest string, ch copy.Chowner, tm *time.Time) (bool, error) {
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src, err := fs.RootPath(srcRoot, src)
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if err != nil {
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return false, err
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}
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if !isArchivePath(src) {
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return false, nil
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}
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dest, err = fs.RootPath(destRoot, dest)
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if err != nil {
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return false, err
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}
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if err := copy.MkdirAll(dest, 0755, ch, tm); err != nil {
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return false, err
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}
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file, err := os.Open(src)
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if err != nil {
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return false, err
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}
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defer file.Close()
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return true, chrootarchive.Untar(file, dest, nil)
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}
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func isArchivePath(path string) bool {
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fi, err := os.Lstat(path)
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if err != nil {
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return false
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}
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if fi.Mode()&os.ModeType != 0 {
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return false
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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 false
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}
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defer file.Close()
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rdr, err := archive.DecompressStream(file)
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if err != nil {
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return false
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}
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r := tar.NewReader(rdr)
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_, err = r.Next()
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return err == nil
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}
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