Set PATHEXT in the Windows installer

[pfmoore]

BPO	18569
Nosy	@loewis, @pfmoore
Files	pathext.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/loewis'
closed_at = <Date 2013-08-01.16:32:43.099>
created_at = <Date 2013-07-27.08:07:43.790>
labels = ['type-feature', 'expert-installation', 'OS-windows']
title = 'Set PATHEXT in the Windows installer'
updated_at = <Date 2013-08-01.16:32:43.098>
user = 'https://github.com/pfmoore'

bugs.python.org fields:

activity = <Date 2013-08-01.16:32:43.098>
actor = 'loewis'
assignee = 'loewis'
closed = True
closed_date = <Date 2013-08-01.16:32:43.099>
closer = 'loewis'
components = ['Installation', 'Windows']
creation = <Date 2013-07-27.08:07:43.790>
creator = 'paul.moore'
dependencies = []
files = ['31051']
hgrepos = []
issue_num = 18569
keywords = ['patch', 'needs review']
message_count = 3.0
messages = ['193781', '194084', '194085']
nosy_count = 3.0
nosy_names = ['loewis', 'paul.moore', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'patch review'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue18569'
versions = ['Python 3.4']

[pfmoore]

Make the Windows Python installer set PATHEXT when "Register Python extensions" is set. This allows users to run a scripy by typing the name of the .py file at the command line without the .py extension.

The patch needs review - I have not been able to build the MSI installer and so this patch is untested :-(

[python-dev]

New changeset 2a38e4da6ce8 by Martin v. Löwis in branch 'default':
Issue bpo-18569: The installer now adds .py to the PATHEXT variable
http://hg.python.org/cpython/rev/2a38e4da6ce8

[loewis]

Thanks for the patch. It works fine (with the expected limitation that you need to restart running shells for this to take effect).