[Python] Mass git updater

mass_git_updater.py

__author__ = "lggomez"
__copyright__ = "Copyright 2017"
__credits__ = ["Luis Gomez"]
__license__ = "MIT"
__version__ = "0.3"
__maintainer__ = "lggomez"
__status__ = "Production"

import argparse
import os
import subprocess

argsParser = argparse.ArgumentParser()
argsParser.add_argument('-dir', nargs=1)
argsParser.add_argument('-fetch', action='store_true')
argsParser.add_argument('-master', action='store_true')
argsParser.add_argument('-safe', action='store_true')
argsParser.add_argument('-silent', action='store_true')

args = argsParser.parse_args()
if not any([args.dir]):
    argsParser.print_usage()
    quit()

pipe = subprocess.PIPE

def executeCommand(command, outputPipe):
    process = subprocess.Popen(command, stdout=outputPipe, stderr=outputPipe)
    stdoutput, stderroutput = process.communicate()
    success = True
    if 'fatal' in stderroutput:
        success = False
    else:
        if not args.silent:
            print '\t' + stdoutput
    return success, stdoutput, stderroutput

def processGitRepository(directory):
    _, output, _ = executeCommand(['git', '-C', directory, 'branch'], pipe)
    branches = [k for k in output.strip().split('\n') if '* ' in k]
    currentBranch = "master"
    if len(branches) > 0:
        currentBranch = branches[0].replace("* ", "")
    if args.fetch:
        executeCommand(['git', '-C', directory, 'fetch'], pipe)
    if args.master:
        executeCommand(['git', '-C', directory, 'checkout', 'master'], pipe)
        currentBranch = "master"
    if args.safe:
        _, stdoutput, _ = executeCommand(['git', '-C', directory, 'status'], pipe)
        if "nothing to commit, working tree clean" in stdoutput:
            executeCommand(['git', '-C', directory, 'pull', 'origin', currentBranch], pipe)
    else:
        executeCommand(['git', '-C', directory, 'pull', 'origin', currentBranch], pipe)

def isGitRepository(directory):
    process = subprocess.Popen(['git', '-C', directory, 'rev-parse', '--is-inside-work-tree'], stdout=pipe, stderr=pipe)
    stdoutput, stderroutput = process.communicate()

    if 'fatal' in stdoutput or 'fatal' in stderroutput:
        return False
    else:
        return stdoutput.strip() == "true"

user = os.path.expanduser("~")
rootDir = os.path.normpath(args.dir[0].strip().replace("~", user))

for root, dirs, _ in os.walk(rootDir):
    for entry in dirs:
        currDir = os.path.join(root, entry)
        if isGitRepository(currDir):
            print "*Git repo found at " + currDir
            processGitRepository(currDir)
    # break after first level
    break

print "DONE"