def String generateVersionName() {
    if (project.hasProperty('versionName')) {
        return project.property('versionName');
    }
    String versionName = VERSION_NAME
    versionName
}

def Integer generateVersionCode() {
    if (project.hasProperty('versionCode')) {
        return project.property('versionCode') as int;
    }
    String versionCode = VERSION_CODE
    versionCode.toInteger()
}

private void save(keyName, keyValue) {
    ant.propertyfile(file: "../gradle.properties") {
        entry(key: keyName, value: keyValue)
    }
}

private void saveVersionName(major, minor, patch) {
    save("VERSION_NAME", "${major}.${minor}.${patch}".toString())
}

private void saveVersionCode(versionCode) {
    save("VERSION_CODE", versionCode)
}

task bumperVersionCode {
    group = 'bumper'
    doLast {
        saveVersionCode(versionCode)
    }
}

task bumperVersionName {
    group = 'bumper'
    doLast {
        save("VERSION_NAME" ,versionName)
    }
}

ext {
    generateVersionCode = this.&generateVersionCode
    generateVersionName = this.&generateVersionName
}