android version auto-increment

version-increment.gradle

android {
    def versionPropsFile = file("version.properties")
    if (!versionPropsFile.canRead()) {
        throw new GradleException("Could not read version.properties, please, provide this file with VERSION_NUMBER parameter")
    }
    def Properties versionProps = new Properties()
    versionProps.load(new FileInputStream(versionPropsFile))
    def versionNumber = versionProps['VERSION_CODE'].toInteger()
    
    defaultConfig {
         versionCode versionNumber
         versionName versionProps['VERSION_NAME']
    }
    
    task incrementBuildNumber << { task ->
        versionNumber += 1;
        versionProps['VERSION_CODE'] = versionNumber.toString()
        versionProps.store(versionPropsFile.newWriter(), null)
        logger.info("Incremented app build number to ${versionNumber}.")
    }
}