#!/usr/bin/env python

# -*- coding: utf-8 -*-

from __future__ import print_function, absolute_import

import subprocess

class GitUtils(object):

@classmethod

def git(cls, *args):

cmd_words = ['git'] + list(args)

print(' '.join(cmd_words))

return cls.quiet_git(*args)

@classmethod

def quiet_git(cls, *args):

cmd_words = ['git'] + list(args)

output = subprocess.check_output(cmd_words, universal_newlines=True)

return output.rstrip()

@classmethod

def get_head(cls):

"""Retrieve the branch or reference to the current HEAD.

"""

try:

return cls.quiet_git('symbolic-ref', '--short', '-q', 'HEAD')

except subprocess.CalledProcessError:

return cls.get_head_sha1()

@classmethod

def get_head_sha1(cls):

return cls.quiet_git('rev-parse', 'HEAD')

@classmethod

def checkout(cls, branch):

cls.git('checkout', '-q', branch)

@classmethod

def checkout_new(cls, branch, at):

cls.git('checkout', '-q', '-b', branch, at)