(dir string, r io.Reader, stripPathComponents int)
| 63 | } |
| 64 | |
| 65 | func untar(dir string, r io.Reader, stripPathComponents int) error { |
| 66 | var ( |
| 67 | err error |
| 68 | header *tar.Header |
| 69 | ) |
| 70 | |
| 71 | if err := os.MkdirAll(dir, dirMode); err != nil { |
| 72 | return errors.Wrapf(err, "error creating output directory %q", dir) |
| 73 | } |
| 74 | |
| 75 | outDir, err := os.OpenRoot(dir) |
| 76 | if err != nil { |
| 77 | return errors.Wrapf(err, "could not open output directory root %q", dir) |
| 78 | } |
| 79 | |
| 80 | defer outDir.Close() //nolint:errcheck |
| 81 | |
| 82 | tr := tar.NewReader(r) |
| 83 | |
| 84 | for header, err = tr.Next(); err == nil; header, err = tr.Next() { |
| 85 | if header == nil { |
| 86 | continue |
| 87 | } |
| 88 | |
| 89 | target, ok := stripLeadingPath(header.Name, stripPathComponents) |
| 90 | if !ok { |
| 91 | continue |
| 92 | } |
| 93 | |
| 94 | if derr := outDir.MkdirAll(filepath.Dir(target), dirMode); derr != nil { |
| 95 | return errors.Wrap(derr, "error creating parent directory") |
| 96 | } |
| 97 | |
| 98 | switch header.Typeflag { |
| 99 | case tar.TypeDir: |
| 100 | if derr := outDir.MkdirAll(target, dirMode); derr != nil { |
| 101 | return errors.Wrap(derr, "error creating directory") |
| 102 | } |
| 103 | |
| 104 | case tar.TypeReg: |
| 105 | //nolint:gosec |
| 106 | if ferr := createFile(outDir, target, os.FileMode(header.Mode), header.ModTime, tr); ferr != nil { |
| 107 | return errors.Wrapf(ferr, "error creating file %v", target) |
| 108 | } |
| 109 | |
| 110 | case tar.TypeSymlink: |
| 111 | if ferr := createSymlink(outDir, target, header.Linkname); ferr != nil { |
| 112 | return errors.Wrapf(ferr, "error creating file %v", target) |
| 113 | } |
| 114 | |
| 115 | default: |
| 116 | return errors.Errorf("unsupported tar entry: %v %v", header.Name, header.Typeflag) |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | if errors.Is(err, io.EOF) { |
| 121 | return nil |
| 122 | } |
no test coverage detected