https://github.com/ttab/flerr

flerr makes it easy to capture errors from deferred functions and allows something close to a block level defer
https://github.com/ttab/flerr

Last synced: 11 months ago
JSON representation

flerr makes it easy to capture errors from deferred functions and allows something close to a block level defer

• Host: GitHub
• URL: https://github.com/ttab/flerr
• Owner: ttab
• License: mit
• Created: 2025-01-17T14:56:27.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-01-19T11:29:52.000Z (over 1 year ago)
• Last Synced: 2025-03-04T19:44:01.311Z (over 1 year ago)
• Language: Go
• Size: 6.84 KB
• Stars: 0
• Watchers: 5
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# Flush errors

Helper library that can be used to capture errors from deferred functions and allows something close to a block level defer.

Example usage:

``` go

func createScriptDir(sourceDir embed.FS, scriptDir string) (outErr error) {

	err := os.MkdirAll(scriptDir, 0o700)

	if err != nil {

		return fmt.Errorf("create script directory: %w", err)

	}

	scripts, err := sourceDir.ReadDir(".")

	if err != nil {

		return fmt.Errorf("list files in source directory: %w", err)

	}

	var clean flerr.Cleaner

	// Clean up all files when the function returns, joining in any errors

	// that might result from the cleanup.

	defer clean.FlushTo(&outErr)

	for _, f := range scripts {

		if f.IsDir() || !strings.HasSuffix(f.Name(), ".py") {

			continue

		}

		src, err := pysrc.Scripts.Open(f.Name())

		if err != nil {

			return fmt.Errorf("open %q for reading: %w", f.Name(), err)

		}

		clean.Addf(src.Close, "close %q", f.Name())

		dst, err := os.Create(filepath.Join(scriptDir, f.Name()))

		if err != nil {

			return fmt.Errorf("create destination file for %q: %w", f.Name(), err)

		}

		clean.Addf(dst.Close, "close %q destination", f.Name())

		_, err = io.Copy(dst, src)

		if err != nil {

			return fmt.Errorf("copy %q: %w", f.Name(), err)

		}

		// Clean up all files at the end of the loop.

		err = clean.Flush()

		if err != nil {

			return err

		}

	}

	return nil

}

```