clean_release.gradle

ext.cleanRelease = {
    def clean = true
    def applicationId = android.defaultConfig.applicationId

    String headCommitMessage = grgit.head().shortMessage
    while (headCommitMessage.contains("[gradle-release-task]")) {
        clean = false
        println "Found git commit: $headCommitMessage"
        if (headCommitMessage.indexOf("$applicationId-") > -1) {
            def tagName = headCommitMessage.split("$applicationId-")[1]
            println "Removing the git tag: $tagName"
            try {
                grgit.tag.remove {
                    names = [tagName]
                }
            } catch (Exception e) {
                println "Error while removing git tag:\n $e"
            }
        }
        println "Resetting the git commit permanently!"
        grgit.reset(commit: "HEAD~1", mode: "hard")
        headCommitMessage = grgit.head().shortMessage

    }
    if (clean){
        println "Repository is already clean"
    }
    println "Done!"
}