dstufft

# Compliments to Nick Coghlan for coming up with this sort of scheme

# foo 1.2 is not installed, this command would download, and "install"
#    it into ~/.pip/dists/foo-1.2/ and then link $VENV/site-packages/foo -> ~/.pip/dists/foo-1.2/
$ pip install foo==1.2

# In another virtualenv this command would see that ~/.pip/dists/foo-1.2/ already
#   exists so instead of downloading + installing it, it simply links $OTHER_VENV/site-packages/foo/
#   to ~/.pip/dists/foo-1.2/
$ pip install foo=1.2

dstufft

import copy


# ----- START [distutils2.version] ----- #
import re

_FINAL_MARKER = ('z',)
_VERSION_RE = re.compile(r'''
    ^
    (?P<version>\d+\.\d+)          # minimum 'N.N'