Automatic versioning and increment using Git tags and Gradle

build.gradle

android {
    defaultConfig {
    ...
        // Fetch the version according to git latest tag and "how far are we from last tag"
        def longVersionName = "git -C ${rootDir} describe --tags --long".execute().text.trim()
        def (fullVersionTag, versionBuild, gitSha) = longVersionName.tokenize('-')
        def(versionMajor, versionMinor, versionPatch) = fullVersionTag.tokenize('.')

        // Set the version name
        versionName "$versionMajor.$versionMinor.$versionPatch($versionBuild)"
        
        // Turn the version name into a version code
        versionCode versionMajor.toInteger() * 100000 +
                versionMinor.toInteger() * 10000 +
                versionPatch.toInteger() * 1000 +
                versionBuild.toInteger()

        // Friendly print the version output to the Gradle console
        printf("\n--------" + "VERSION DATA--------" + "\n" + "- CODE: " + versionCode + "\n" + 
               "- NAME: " + versionName + "\n----------------------------\n")
    ...
    }
}