golang FindFileByExtension

findfilebyext.go

// FindFileByExtension walks a given directory searching for a given extension and returns a list of matching results.
func FindFileByExtension(dirpath string, ext string) ([]string, error) {
	var match []string
	err := filepath.Walk(dirpath, func(path string, f os.FileInfo, _ error) error {
		if !f.IsDir() && strings.HasSuffix(f.Name(), ext) {
			match = append(match, f.Name())
		}
		return nil
	})
	if err != nil {
		return []string{}, err
	}

	if len(match) < 1 {
		return match, fmt.Errorf("no %s files found in %s", ext, dirpath)
	}

	return match, nil
}