git version count and version name

build.gradle

def getCommitCount() {
    final Scanner s = new Scanner(getCommitNumberFromGit());
    int count = 0;
    while (s.hasNextLine()) {
        s.nextLine();
        count++;
    }
    return count;
}

def getCommitNumberFromGit() {
    def stdout = new ByteArrayOutputStream()
    exec {
        commandLine 'git', 'rev-list', '--all'
        standardOutput = stdout
    }
    return stdout.toString().trim()
}



def getVersionNameFromGit() {
    def stdout = new ByteArrayOutputStream()
    exec {
        commandLine 'git', 'describe', '--tags', '--always'
        standardOutput = stdout
    }
    return stdout.toString().trim()
}

build2.gradle

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        versionName getVersionNameFromGit()
        versionCode = getCommitCount()
    }
}