#!/usr/bin/env python

# Copyright (C) 2013 Google Inc.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""

Updates dependencies in requirements.txt to the latest version.

"""

import argparse

from pip.req.req_file import parse_requirements

from pkg_resources import Requirement

import requests

def get_package_info(package):

url = 'https://pypi.python.org/pypi/{}/json'.format(package)

r = requests.get(url)

r.raise_for_status()

return r.json()['info']

def read_requirements(req_file):

return [x.req for x in parse_requirements(req_file, session={})]

def update_req(req):

info = get_package_info(req.project_name)

newest_version = info['version']

current_spec = req.specs[0] if req.specs else ('==', 'unspecified')

new_spec = ('==', newest_version)

if current_spec != new_spec:

newreq = Requirement(req.unsafe_name, [new_spec], req.extras)

print('Updated {} from {} -> {}'.format(

req.project_name,

current_spec[1],

newest_version))

return newreq

return req

def write_requirements(reqs, req_file):

with open(req_file, 'w') as f:

for req in reqs:

f.write('{}\n'.format(req))

def main(req_file):

reqs = read_requirements(req_file)

reqs = [update_req(req) for req in reqs]

write_requirements(reqs, req_file)

if __name__ == '__main__':

parser = argparse.ArgumentParser(description=__doc__)

parser.add_argument(

'requirements_file',

help='Path the the requirements.txt file to update.')

args = parser.parse_args()

main(args.requirements_file)