Incorrect regex to strip sys.argv[0] from extension and suffix on Windows

[pombredanne]

The regex at

pip/pip/wheel.py

Line 416 in 1da0ea1

sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])

is likely incorrect:

1. It does not handle the common case where the generated console script is named xxx-script.py
2. Yet on the other hand, since for wheels there are no -script.py generated on Windows (only an exe), checking for pyw is actually useless IMHO

FWIW, the regex is the same as in distlib here:
https://bitbucket.org/pypa/distlib/src/6ada86eea2700f10edcd81f831139c6ae20edb74/distlib/scripts.py?at=default&fileviewer=file-view-default#scripts.py-55

The bug was found by @dstufft through pallets/click#365

[pombredanne]

See also a related issue in setuptools:
https://bitbucket.org/pypa/setuptools/issues/459/incorrect-sysargv-0-for-generated-console

[pombredanne]

@vsajip : could it be that the stripping regex in distlib is also incorrect in the same way?

[pombredanne]

@Ofekmeister Thanks! .... Let me close this now then.