func addOrCheckLicense()

in main.go [193:218]

• 21 lines of code
• 7 McCabe index (conditional complexity)

func addOrCheckLicense(path, ext, license string, headerBytes []byte, info fs.DirEntry, dry bool, out io.Writer) error {
	if info.IsDir() || filepath.Ext(path) != ext {
		return nil
	}

	f, e := os.Open(path)
	if e != nil {
		return &Error{err: e, code: exitFailedToOpenWalkFile}
	}
	defer f.Close()

	if licensing.ContainsHeader(f, licensing.Headers[license]) {
		return nil
	}

	if dry {
		reportFile(out, path)
		return &Error{code: exitSourceNeedsToBeRewritten}
	}

	if err := licensing.RewriteFileWithHeader(path, headerBytes); err != nil {
		return &Error{err: err, code: errFailedRewrittingFile}
	}

	return nil
}