build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        mavenCentral()
        maven {
            url "https://oss.sonatype.org/content/groups/public"
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.+'
        classpath 'com.github.townsfolk:gradle-release:+'
    }
}

allprojects {
    repositories {
        mavenCentral()
    }
}

apply plugin: 'release'

release {
    failOnPublishNeeded = false
    preTagCommitMessage = '[RELEASE] Released version:'
    tagCommitMessage = '[RELEASE] Tagged version:'
    newVersionCommitMessage = '[RELEASE] Bumped version for next development iteration:'
}

task updateVersionCode << {
    def oldVersionCode = "${project.versionCode}".toInteger()
    def newVersionCode = oldVersionCode + 1

    if (oldVersionCode != newVersionCode) {
        project.ant.propertyfile(file: "gradle.properties") {
            entry(key: "versionCode", value: "${newVersionCode}")
        }
    }
}

updateVersion.dependsOn updateVersionCode