Apktool/gradle/functions.gradle

import org.codehaus.groovy.runtime.MethodClosure

/**
 *  Copyright 2014 Ryszard Wiśniewski <brut.alll@gmail.com>
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

def getCheckedOutGitCommitHash() {
    def gitFolder = "$projectDir/.git/"
    def takeFromHash = 6

    def head
    try {
        head = new File(gitFolder + "HEAD").text.split(":")
    } catch(Exception ignored) {
        return null
    }

    def isCommit = head.length == 1
    if(isCommit) return head[0].trim().take(takeFromHash)

    def refHead = new File(gitFolder + head[1].trim())
    refHead.text.trim().take takeFromHash
}

def getCheckedOutBranch() {
    def gitFolder = "$projectDir/.git/"

    def head
    try {
        head = new File(gitFolder + "HEAD").text.split("/")
        return head[2].trim()
    } catch(Exception ignored) {
        return "SNAPSHOT"
    }
}

ext {
    getCheckedOutGitCommitHash = this.&getCheckedOutGitCommitHash as MethodClosure
    getCheckedOutBranch = this.&getCheckedOutBranch as MethodClosure
}