git.gradle

// git helper functions
// based on http://stackoverflow.com/questions/17097263/automatically-versioning-android-project-from-git-describe-with-android-studio-g
gradle.allprojects {

    ext.gitCommitCount = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'rev-list', 'HEAD', '--count' // get the commit count for head
                standardOutput = stdout
            }
            return stdout.toString().trim().toInteger()
        }
        catch (ignored) {
            return -1;
        }
    }

    ext.gitCurrentBranch = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'rev-parse', '--abbrev-ref', 'HEAD' // get the current branch
                standardOutput = stdout
            }
            return stdout.toString().trim()
        }
        catch (ignored) {
            return null;
        }
    }


    ext.gitHash = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'rev-parse', '--short', 'HEAD' // get the current branch
                standardOutput = stdout
            }
            return stdout.toString().trim()
        } catch (ignored) {
            return null;
        }
    }

    ext.gitDirty = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'diff-index', '--quiet', 'HEAD' // get the current branch
                standardOutput = stdout
            }
            return ''
        } catch (ignored) {
            return '-dirty'
        }
    }

    ext.gitTag = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'describe', '--tags', '--dirty' // get the current branch
                standardOutput = stdout
            }
            return stdout.toString().trim()
        }
        catch (ignored) {
            return null;
        }
    }

    ext.gitDescribe = { ->
        try {
            def stdout = new ByteArrayOutputStream()
            exec {
                commandLine 'git', 'describe', '--always', '--dirty' // get the current branch
                standardOutput = stdout
            }
            return stdout.toString().trim()
        }
        catch (ignored) {
            return null;
        }
    }

}