func SeparateAliasFromRest()

in graph/preprocessor.go [267:299]

• 28 lines of code
• 8 McCabe index (conditional complexity)

func SeparateAliasFromRest(data []byte) ([]byte, []byte) {
	reader := bytes.NewReader(data)
	scanner := bufio.NewScanner(reader)
	scanner.Split(bufio.ScanLines)

	var aliasBuffer bytes.Buffer
	var buffer bytes.Buffer

	inside := false
	aliasFieldName := regexp.MustCompile(`\Aalias\s*:.*\z`)
	genericTopLevelRe := regexp.MustCompile(`\A[^\s:]+[^:]*:.*\z`)
	commentRe := regexp.MustCompile(`\A\s*#.*`)
	for scanner.Scan() {
		text := scanner.Text()
		if matched := commentRe.MatchString(text); matched {
			continue
		}

		if matched := aliasFieldName.MatchString(text); matched && !inside {
			inside = true
		} else if matched := genericTopLevelRe.MatchString(text); matched && inside {
			inside = false
		}

		if inside {
			aliasBuffer.WriteString(text + "\n")
		} else {
			buffer.WriteString(text + "\n")
		}
	}

	return aliasBuffer.Bytes(), buffer.Bytes()
}