lazy versionCode with git versioner

build.gradle

// Optional: configure the versioner (before applying the script)
/* ext.gitVersioner = [
        defaultBranch           : "develop",  // default "master"
        yearFactor              : 1200,       // default "1000", increasing every 8.57h
        snapshotEnabled         : false,      // default false, the "-SNAPSHOT" postfix
        localChangesCountEnabled: false       // default false, the (<commitCount>) before -SNAPSHOT
] */
apply from: 'https://raw.githubusercontent.com/passsy/gradle-GitVersioner/master/git-versioner.gradle'

android {
  defaultConfig {
    versionCode gitVersion.version // will change after every commit
    versionName "1.0" // or the JakeWharton naming
    
    // Don't use a dynamic version name. This will change the AndroidManifest.xml for
    // every build and forces instantrun to reinstall the app instead of sending the 
    // diff to the device. Instant run will not work!
    // use Buildconfig.REVISION instead.
    // versionName gitVersionName
    buildConfigField 'String', 'REVISION', "\"$gitVersionName\""
  }
}