Deploy script appengine with modules

deploy.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
import re
import argparse
import os
import zipfile
import yaml
from subprocess import call

__author__ = 'broken'

DEFAULT_APP_ROOT = 'app/'

DEPLOY_YAML_FILES = []
APP_YAML = None
APPLICATION_NAME = None
ORG_APPLICATION_NAME = None

def store_app_config(file_name, yaml_data):
	global APP_YAML
	global ORG_APPLICATION_NAME
	APP_YAML = (file_name, yaml_data)
	ORG_APPLICATION_NAME = yaml_data['application']

	if not APPLICATION_NAME:
		global APPLICATION_NAME
		APPLICATION_NAME = yaml_data['application']

def load_yaml_files(app_root):
	filenames = []
	(_, _, filenames) = os.walk(app_root).next()

	for file_name in filenames:
		if file_name.endswith('.yaml') and not file_name == 'app_config.yaml':
			with open('%s%s' % (app_root, file_name), 'r') as f:
				yaml_data = yaml.load(f)
				if 'application' in yaml_data:
					DEPLOY_YAML_FILES.append((file_name, yaml_data))
				if file_name == 'app.yaml':
					store_app_config(file_name, yaml_data)

def update_application_in_yaml_files(app_root, application_name):
	for file_name, yaml_data in DEPLOY_YAML_FILES:
		with open('%s%s' % (app_root, file_name), 'w') as open_f:
			yaml_data['application'] = application_name
			open_f.write(yaml.dump(yaml_data, default_flow_style=False))

def run(app_root='.'):
    print 'Locating all yaml files'
    load_yaml_files(app_root)
    print 'Set application to: %s' % APP_YAML[1]['application']
    update_application_in_yaml_files(app_root, APPLICATION_NAME)
    print 'Deploying %s' % APP_YAML[1]['application']
    call(['appcfg.py', 'update'] + [file_name for file_name, yaml_data in DEPLOY_YAML_FILES if file_name != 'dispatch.yaml'])
    print 'Updating dispatch'
    call(['appcfg.py', 'update_dispatch', app_root])
    print 'Updating indexes'
    call(['appcfg.py', 'update_indexes', app_root])
    print 'Clean up'
    update_application_in_yaml_files(app_root, ORG_APPLICATION_NAME)


parser = argparse.ArgumentParser(description='Deploy script for appengine modules.')
parser.add_argument('-a', '--app', action='store', type=str, help='App root', default=DEFAULT_APP_ROOT)
parser.add_argument('-n', '--name', action='store', type=str, help='Application name')
args = parser.parse_args()

if args.name:
	global APPLICATION_NAME
	APPLICATION_NAME = args.name

run(app_root=args.app)