Change log methods

ChangeLog.groovy

ext.getChangeLog = { lastCommitsCount = 10 ->
    return formatGitLog(getGitLogUntilCommitNumber(lastCommitsCount))
}

ext.getReleaseChangeLog = {
    def lastTag = getLastTag()

    return formatGitLog(getGitLogUntilTag(lastTag))
}

private static String getGitLogUntilTag(String tag) {
    return "git log $tag..HEAD --oneline --no-merges --pretty=format:\"%s\"".execute().text
}

private static String getGitLogUntilCommitNumber(int commitNumber) {
    return "git log HEAD~$commitNumber..HEAD --oneline --no-merges --pretty=format:\"%s\"".execute().text
}

private static String getLastTag() {
    return "git describe --tags --abbrev=0".execute().text.trim()
}

private static String formatGitLog(String gitLog) {
    def changeLog = ""
    final plainLog = gitLog.trim().replaceAll('"', '')

    plainLog.eachLine { line ->
        changeLog += "• $line\n"
    }

    return changeLog
}

private static String formatToMarkdownLines(String text) {
    def newText = ""
    final trimmedText = text.trim()
    final lastLineIndex = trimmedText.readLines().size() - 1

    def counter = 0
    trimmedText.eachLine { line ->
        newText += "$line"

        if (counter != lastLineIndex) {
            newText += "\\\n"
        }

        counter++
    }

    return newText
}