Automatic Android app versioning using git tags

build.gradle

def tags = "git -C ${rootDir} tag".execute().text.trim()
        def numTags = tags.tokenize('\n').size()
        // 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"

        // Each tag is a new version code
        versionCode numTags

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