Generate Android version code from git count in Gradle (build.gradle)

build.groovy

// Generate a minor version code from git commit count (for prod builds)

static def generateVersionCode() {
    def result = "git rev-list HEAD --count".execute().text.trim() //unix
    if(result.empty) result = "PowerShell -Command git rev-list HEAD --count".execute().text.trim() //windows
    if(result.empty) throw new RuntimeException("Could not generate versioncode on this platform? Cmd output: ${result.text}")
    return result.toInteger()
}

def majorVersion = 1

android {
    defaultConfig {
        versionCode generateVersionCode()
        versionName "${majorVersion}.${generateVersionCode()}"
    }
}