Function ExtractSubject

git/parser/commit_message.go:59–85

ExtractSubject extracts subject from a commit message. The result should be like output of the one line commit summary, like "git log --oneline" or "git log --format=%s".

(message string)

// ExtractSubject extracts subject from a commit message. The result should be like output of
// the one line commit summary, like "git log --oneline" or "git log --format=%s".
func ExtractSubject(message string) string {
	var messageStarted bool

	builder := strings.Builder{}

	scan := bufio.NewScanner(strings.NewReader(message))
	for scan.Scan() {
		line := strings.TrimSpace(scan.Text())

		// process empty lines
		if len(line) == 0 {
			if messageStarted {
				return builder.String()
			}
			continue
		}

		if messageStarted {
			builder.WriteByte(' ')
		}

		builder.WriteString(line)
		messageStarted = true
	}

	return builder.String()
}

// SplitMessage splits a commit message. Returns two strings:
// * subject (the one line commit summary, like "git log --oneline" or "git log --format=%s),