untar reads the tar file from r and writes it into dir. Adapted from https://github.com/golang/build/blob/master/cmd/buildlet/buildlet.go
(dir string)
| 54 | // |
| 55 | // Adapted from https://github.com/golang/build/blob/master/cmd/buildlet/buildlet.go |
| 56 | func untar(dir string) (err error) { |
| 57 | t0 := time.Now() |
| 58 | nFiles := 0 |
| 59 | madeDir := map[string]bool{} |
| 60 | |
| 61 | tr := tar.NewReader(bytes.NewReader(embeddedApp)) |
| 62 | loggedChtimesError := false |
| 63 | for { |
| 64 | f, err := tr.Next() |
| 65 | if err == io.EOF { |
| 66 | break |
| 67 | } |
| 68 | if err != nil { |
| 69 | return fmt.Errorf("tar error: %w", err) |
| 70 | } |
| 71 | if f.Typeflag == tar.TypeXGlobalHeader { |
| 72 | // golang.org/issue/22748: git archive exports |
| 73 | // a global header ('g') which after Go 1.9 |
| 74 | // (for a bit?) contained an empty filename. |
| 75 | // Ignore it. |
| 76 | continue |
| 77 | } |
| 78 | rel, err := nativeRelPath(f.Name) |
| 79 | if err != nil { |
| 80 | return fmt.Errorf("tar file contained invalid name %q: %v", f.Name, err) |
| 81 | } |
| 82 | abs := filepath.Join(dir, rel) |
| 83 | |
| 84 | fi := f.FileInfo() |
| 85 | mode := fi.Mode() |
| 86 | switch { |
| 87 | case mode.IsRegular(): |
| 88 | // Make the directory. This is redundant because it should |
| 89 | // already be made by a directory entry in the tar |
| 90 | // beforehand. Thus, don't check for errors; the next |
| 91 | // write will fail with the same error. |
| 92 | dir := filepath.Dir(abs) |
| 93 | if !madeDir[dir] { |
| 94 | if err := os.MkdirAll(filepath.Dir(abs), mode.Perm()); err != nil { |
| 95 | return err |
| 96 | } |
| 97 | madeDir[dir] = true |
| 98 | } |
| 99 | if runtime.GOOS == "darwin" && mode&0111 != 0 { |
| 100 | // See comment in writeFile. |
| 101 | err := os.Remove(abs) |
| 102 | if err != nil && !errors.Is(err, fs.ErrNotExist) { |
| 103 | return err |
| 104 | } |
| 105 | } |
| 106 | if _, err := os.Stat(abs); os.IsNotExist(err) { |
| 107 | wf, err := os.OpenFile(abs, os.O_RDWR|os.O_CREATE|os.O_TRUNC, mode.Perm()) |
| 108 | if err != nil { |
| 109 | return err |
| 110 | } |
| 111 | n, err := io.Copy(wf, tr) |
| 112 | if closeErr := wf.Close(); closeErr != nil && err == nil { |
| 113 | err = closeErr |
no test coverage detected