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requireits.py
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requireits.py
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import json
import logging
import os.path
from pkg_resources import parse_version
import os
import sys
import tempfile
import requests
import requirements
PYPI_URL = 'https://pypi.python.org/pypi/{0}/json'
FAIL_SILENTLY = False
TEST_REQUIREMENTS_PKGS = """
Django==1.6.7
south==0.8.4
git+https://github.com/jeffkistler/django-decorator-include.git@1cce01ee0130156e8fde5c46e61287bea37c5c7f#egg=django-decorator-include
"""
MORE_TEST_REQUIREMENTS_PKGS = """
requests==2.2.1
"""
PIP_IGNORE_PKGS = """
Django
"""
logger = logging.getLogger('check_requirements')
logger_handler = logging.StreamHandler(sys.stdout)
logger_handler.setFormatter(logging.Formatter('%(message)s'))
logger_handler.setLevel(logging.DEBUG)
logger.setLevel(logging.INFO)
logger.addHandler(logger_handler)
class PackageNotFound(Exception):
pass
class Requirement(object):
def __init__(self, name, installed_version, latest_version):
self.name = name
self.installed_version = installed_version
self.latest_version = latest_version
def is_outdated(self):
if self.installed_version != self.latest_version:
return True
else:
return False
def is_valid_package(self):
if not self.installed_version:
return False
else:
return True
def parse_requirements(req_files):
"""Parse a list of requirement file and return a set of packages"""
reqs = []
for req_file in req_files:
with open(req_file) as f:
for req in requirements.parse(f):
reqs.append(req)
return set(reqs)
def load_pkg_info(pkg_name):
"Load package info given a package name"
try:
url_req = requests.get(PYPI_URL.format(pkg_name))
except requests.exceptions.ConnectionError:
return
if url_req.status_code == 200:
pkg_info = url_req.text
return json.loads(pkg_info.decode('utf-8'))
def get_pkg_info(pkg_name):
pkg_info = load_pkg_info(pkg_name)
if not pkg_info and not FAIL_SILENTLY:
raise PackageNotFound('{0} not found.'.format(pkg_name))
return pkg_info
def get_latest_version(pkg_info):
"""Return latest version of a package"""
if not pkg_info:
return None, None
version = pkg_info['info']['version']
return parse_version(version), version
def get_ignored_packages():
"""Return a list of ignored packages described inside .pipignopre"""
ignored_packages = []
if os.path.isfile('.pipignore'):
with open('.pipignore') as f:
ignored_packages = f.read().strip().splitlines()
return ignored_packages
def get_packages(req_files, ignored_packages=None):
"""Get packages to be reported
Examples
--------
req_files = ['requirements/base.txt', ]
pkgs = get_packages(req_files)
for pkg in pkgs:
if pkg.is_valid_package():
if pkg.is_outdated:
print 'Package {0} is outdated.'.format(pkg.name)
else:
print 'Package {0} is up-to-date.'.format(pkg.name)
else:
print 'No information found for {0}.'.format(pkg.name)
"""
requirements_pkgs = parse_requirements(req_files)
reported_pkgs = []
for pkg in requirements_pkgs:
installed_version = None
latest_version = None
if not ignored_packages:
ignored_packages = get_ignored_packages()
if not pkg.name in ignored_packages:
pkg_versions = get_latest_version(get_pkg_info(pkg.name))
if pkg:
try:
installed_version = pkg.specs[0][1]
latest_version = pkg_versions[1]
except IndexError:
logger.debug(
'No information found for {0}.'.format(pkg.name))
finally:
req = Requirement(pkg.name,
installed_version,
latest_version)
# Add Requirement objects to the list
reported_pkgs.append(req)
return reported_pkgs
def test_check_count_pkgs():
with tempfile.NamedTemporaryFile('w') as f:
f.write(TEST_REQUIREMENTS_PKGS)
f.flush()
pkgs = get_packages([f.name])
assert len(pkgs) == 3
def test_multiple_requirement_files():
with tempfile.NamedTemporaryFile('w') as f1:
f1.write(TEST_REQUIREMENTS_PKGS)
f1.flush()
with tempfile.NamedTemporaryFile('w') as f2:
f2.write(MORE_TEST_REQUIREMENTS_PKGS)
f2.flush()
pkgs = get_packages([f1.name, f2.name])
assert len(pkgs) == 4
def test_ignored_pkgs():
with tempfile.NamedTemporaryFile('w+r') as f:
f.write(TEST_REQUIREMENTS_PKGS)
f.flush()
ignored_packages = ['Django']
pkgs = get_packages([f.name], ignored_packages)
assert len(pkgs) == 2