versions.gradle

ext {
    git = rootProject.ext.Grgit.open(currentDir: projectDir)
    gitBranchName = git.branch.current().name
    gitVersionName = git.describe(tags: true)
    gitVersionCode = git.tag.list().size()
    gitVersionCodeTime = git.head().dateTime.toEpochSecond().intValue()

    task printVersion() {
        println("Version Name: $gitVersionName")
        println("Version Code: $gitVersionCode")
        println("Version Code Time: $gitVersionCodeTime")
    }
}

def buildTime() {
    def date = new Date()
    def formattedDate = date.format('yyyyMMdd_HHmm')
    return formattedDate
}

ext.gitBranchName = {
    def branch = ""
    def proc = "git rev-parse --abbrev-ref HEAD".execute()
    proc.in.eachLine { line -> branch = line }
    proc.err.eachLine { line -> println line }
    proc.waitFor()
    return branch
}

ext.getGitHeadRefsSuffix = {
    try {
        def headFile = new File(rootDir.getParent(), '.git/HEAD')
        if (headFile.exists()) {
            String[] strings = headFile.getText('UTF-8').split(" ")
            if (strings.size() > 1) {
                def refHeadFile = new File(rootDir.getParent(), '.git/' + strings[1])
                String refFilePath = refHeadFile.getPath()
                def refFile = new File(refFilePath.replace("\n", ""))
                return refFile.getText('UTF-8').substring(0, 7)
            }
        } else {
            return "headFile"
        }
    } catch (Exception e) {
        logger.log(LogLevel.ERROR, e.getMessage())
        return "error"
    }
    return "default_version"
}