Function CleanUpWhitespace

git/parser/commit_message.go:25–55

CleanUpWhitespace removes extra whitespace for the multiline string passed as parameter. The intended usage is to clean up commit messages.

(message string)

// CleanUpWhitespace removes extra whitespace for the multiline string passed as parameter.
// The intended usage is to clean up commit messages.
func CleanUpWhitespace(message string) string {
	var messageStarted bool
	var isLastLineEmpty bool

	const eol = '\n'

	builder := strings.Builder{}

	scan := bufio.NewScanner(strings.NewReader(message))
	for scan.Scan() {
		line := strings.TrimRightFunc(scan.Text(), unicode.IsSpace)

		if len(line) == 0 {
			if messageStarted {
				isLastLineEmpty = true
			}
			continue
		}

		if isLastLineEmpty {
			builder.WriteByte(eol)
		}

		builder.WriteString(line)
		builder.WriteByte(eol)
		isLastLineEmpty = false
		messageStarted = true
	}

	return builder.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".