Gradle version control

build.gradle

defaultConfig {
    def gitCommitHash = "git rev-parse --short HEAD".execute().text.trim()
    if ("git status -s".execute().text.trim() != "") {
        gitCommitHash += "-dirty"
    }
    applicationId "com.sigmadelta.kiln"
    minSdkVersion.apiLevel 21
    targetSdkVersion.apiLevel 23
    versionCode 1
    versionName "1.0.0 - " + gitCommitHash
}