build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
def gitHash() {
    try {
        def code = new ByteArrayOutputStream()
        exec {
            commandLine 'git', 'rev-parse', '--verify', '--short', 'HEAD'
            standardOutput = code
        }
        return code.toString().trim()
    }
    catch (ignored) {
        return "<unknown>";
    }
}

def gitDescribe() {
    try {
        def code = new ByteArrayOutputStream()
        exec {
            commandLine 'git', 'describe', '--always', '--dirty=-dirty'
            standardOutput = code
        }
        return code.toString().trim()
    }
    catch (ignored) {
        return "<unknown>"
    }
}

def gitVersion() {
    (gitDescribe() =~ /^v/).replaceFirst('')
}