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  2. 0 README.md → README.rst
  3. +25 −0 setup.py
  4. +103 −0 src/piplint/__init__.py
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+#!/usr/bin/python
+
+from setuptools import setup
+
+setup(
+ name="piplint",
+ license='Apache License 2.0',
+ version="0.1.0",
+ description="Checks packages in your active environment against pip requirements files",
+ author="David Cramer",
+ url="https://github.com/dcramer/piplint",
+ packages=["piplint"],
+ package_dir={'': 'src'},
+ entry_points={
+ 'console_scripts': [
+ 'piplint = piplint:main',
+ ],
+ },
+ classifiers=[
+ "Environment :: Console",
+ "Intended Audience :: Developers",
+ "Programming Language :: Python",
+ "Topic :: Software Development",
+ "Topic :: Utilities",
+ ])
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+"""
+piplint
+~~~~~~~
+
+:copyright: 2012 DISQUS.
+:license: Apache License 2.0, see LICENSE for more details.
+"""
+
+import re
+import sys
+from pkg_resources import parse_version
+from subprocess import Popen, PIPE
+
+
+def check_requirements(requirement_files):
+ """
+ Given a list of requirements files, checks them against the installed
+ packages in the currentl environment. If any are missing, or do not fit
+ within the version bounds, exits with a code of 1 and outputs information
+ about the missing dependency.
+ """
+ version_re = re.compile(r'^([^<>=\s#]+)\s*(>=|>|<|<=|==)?\s*([^<>=\s#]+)?(?:\s*#.*)?$')
+
+ def parse_package_line(line):
+ try:
+ package, compare, version = version_re.split(line)[1:-1]
+ except ValueError:
+ raise ValueError("Unknown package line format: %r" % line)
+ return (package, compare or None, parse_version(version) if version else None, line)
+
+ def valid_version(version, compare, r_version):
+ if not all([compare, version]):
+ return True
+ if compare == '==':
+ return version == r_version
+ elif compare == '<=':
+ return version <= r_version
+ elif compare == '>=':
+ return version >= r_version
+ elif compare == '<':
+ return version < r_version
+ elif compare == '>':
+ return version > r_version
+ raise ValueError("Unknown comparison operator: %r" % compare)
+
+ frozen_reqs = []
+ unknown_reqs = set()
+ listed_reqs = []
+
+ freeze = Popen(['pip freeze'], stdout=PIPE, shell=True)
+ for line in freeze.communicate()[0].splitlines():
+ line = line.strip()
+ if not line or line.startswith('-'):
+ unknown_reqs.add(line)
+ continue
+ frozen_reqs.append(parse_package_line(line))
+
+ for fname in requirement_files:
+ with open(fname) as fp:
+ for line in fp:
+ line = line.strip()
+ if not line or line.startswith('-'):
+ continue
+
+ listed_reqs.append(parse_package_line(line))
+
+ unknown_reqs.update(set(r[0] for r in frozen_reqs).difference(set(r[0] for r in listed_reqs)))
+
+ for r_package, r_compare, r_version, r_line in listed_reqs:
+ found = False
+ for package, _, version, line in frozen_reqs:
+ if found:
+ continue
+ if package == r_package:
+ if not valid_version(version, r_compare, r_version):
+ print "Requirement %r was found in virtualenv, but is not a valid version" % r_package
+ print "Found %r, but expected %r" % (line, r_line)
+ return 0
+
+ found = True
+
+ if not found:
+ print "Requirement %r not found in virtualenv." % r_package
+ print "You must correct your environment before committing (and running tests)."
+ if unknown_reqs:
+ print ""
+ print "For debugging purposes, the following unrecognized requirements were found:"
+ print ""
+ print "\n".join(sorted(unknown_reqs))
+ return 1
+
+ return 0
+
+
+def main():
+ file_list = sys.argv[1:]
+ if not file_list:
+ print "Usage: piplint <requirements.txt>"
+ sys.exit(1)
+ sys.exit(check_requirements(file_list))
+
+if __name__ == '__main__':
+ main()

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