estimateModuleSize estimates the size impact of adding the specified module directory to a tar archive.
(root fs.FS, moduleDir string)
| 210 | // estimateModuleSize estimates the size impact of adding the specified module |
| 211 | // directory to a tar archive. |
| 212 | func estimateModuleSize(root fs.FS, moduleDir string) (int64, error) { |
| 213 | size := int64(0) |
| 214 | err := fs.WalkDir(root, moduleDir, func(_ string, d fs.DirEntry, err error) error { |
| 215 | if err != nil { |
| 216 | return err |
| 217 | } |
| 218 | fileMode := d.Type() |
| 219 | if !fileMode.IsRegular() && !fileMode.IsDir() { |
| 220 | return nil |
| 221 | } |
| 222 | |
| 223 | // .git directories are not needed in the archive and only cause |
| 224 | // hash differences for identical modules. |
| 225 | if fileMode.IsDir() && d.Name() == ".git" { |
| 226 | return fs.SkipDir |
| 227 | } |
| 228 | |
| 229 | fileInfo, err := d.Info() |
| 230 | if err != nil { |
| 231 | return xerrors.Errorf("file info: %w", err) |
| 232 | } |
| 233 | |
| 234 | size += 512 // tar header size |
| 235 | if !fileMode.IsRegular() { |
| 236 | return nil // Dirs have no content size |
| 237 | } |
| 238 | |
| 239 | fileSize := fileInfo.Size() |
| 240 | size += fileSize |
| 241 | // Pad to 512 bytes |
| 242 | size += 512 - (fileSize % 512) |
| 243 | return nil |
| 244 | }) |
| 245 | if err != nil { |
| 246 | return -1, err |
| 247 | } |
| 248 | return size, err |
| 249 | } |
| 250 | |
| 251 | func fileHeader(filePath string, fileMode fs.FileMode, fileInfo fs.FileInfo) (*tar.Header, error) { |
| 252 | header, err := tar.FileInfoHeader(fileInfo, "") |