func()

in dev/codeowners/codeowners.go [141:170]

• 25 lines of code
• 9 McCabe index (conditional complexity)

func (codeowners *githubOwners) checkSingleField(field string) error {
	switch field[0] {
	case '/':
		// Allow only rules that wouldn't remove owners for previously
		// defined rules.
		for path := range codeowners.owners {
			matches, err := filepath.Match(field, path)
			if err != nil {
				return err
			}
			if matches || strings.HasPrefix(field, path) {
				return fmt.Errorf("%q would remove owners for %q", field, path)
			}

			if strings.HasPrefix(path, field) {
				_, err := filepath.Rel(field, path)
				if err == nil {
					return fmt.Errorf("%q would remove owners for %q", field, path)
				}
			}
		}

		// Excluding other files is fine.
		return nil
	case '@':
		return fmt.Errorf("rule with owner without path: %q", field)
	default:
		return fmt.Errorf("unexpected field found: %q", field)
	}
}