shutil.which() should preserve path case

[serhiy-storchaka]

BPO	16993
Nosy	@pitrou, @tarekziade, @skrah, @hynek, @serhiy-storchaka
Files	shutil_which_normcase.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/serhiy-storchaka'
closed_at = <Date 2013-01-24.18:18:34.258>
created_at = <Date 2013-01-18.09:25:25.438>
labels = ['type-bug', 'library', 'OS-windows']
title = 'shutil.which() should preserve path case'
updated_at = <Date 2013-01-24.18:18:34.230>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2013-01-24.18:18:34.230>
actor = 'serhiy.storchaka'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2013-01-24.18:18:34.258>
closer = 'serhiy.storchaka'
components = ['Library (Lib)', 'Windows']
creation = <Date 2013-01-18.09:25:25.438>
creator = 'serhiy.storchaka'
dependencies = []
files = ['28781']
hgrepos = []
issue_num = 16993
keywords = ['patch']
message_count = 9.0
messages = ['180181', '180246', '180248', '180338', '180357', '180371', '180373', '180534', '180539']
nosy_count = 7.0
nosy_names = ['pitrou', 'tarek', 'skrah', 'python-dev', 'Ramchandra Apte', 'hynek', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue16993'
versions = ['Python 3.3', 'Python 3.4']

[serhiy-storchaka]

Now which lowercase found directory name and extension on Windows.

>>> shutil.which("python")
'c:\\python33\\python.exe'

Proposed patch preserve case.

>>> shutil.which("python")
'C:\\Python33\\python.exe'

Please test this on Windows.

[RamchandraApte]

Somehow the patch is not showing for me.

[serhiy-storchaka]

Oh, sorry. Here is a patch.

[python-dev]

New changeset d2db601a53b3 by Serhiy Storchaka in branch '3.3':
Issue bpo-16993: shutil.which() now preserves the case of the path and extension
http://hg.python.org/cpython/rev/d2db601a53b3

New changeset 5faae2bdf1e0 by Serhiy Storchaka in branch 'default':
Issue bpo-16993: shutil.which() now preserves the case of the path and extension
http://hg.python.org/cpython/rev/5faae2bdf1e0

[serhiy-storchaka]

Test broken on Windows because PATHEXT contains uppercased extension ".EXT".

Proposed solutions:

1. Fix the test: expect uppercased extension, or do case-insensitive extension comparison, or get extension from PATHEXT.
2. Rollback the part of previous changes which preserve case of extensions from PATHEXT and always lowercase them.
3. Rollback the changes overall.
4. Use not used for now ntpath._getfinalpathname() to get a real file name (it resolves symlinks, though).

[python-dev]

New changeset 28282e4e9d04 by Serhiy Storchaka in branch '3.3':
Fix shutil.which() test for issue bpo-16993.
http://hg.python.org/cpython/rev/28282e4e9d04

New changeset e8f40d4f497c by Serhiy Storchaka in branch 'default':
Fix shutil.which() test for issue bpo-16993.
http://hg.python.org/cpython/rev/e8f40d4f497c

[serhiy-storchaka]

I chose the first simplest variant.

[skrah]

Serhiy, test_pathext_checking still fails on many Windows buildbots:

http://buildbot.python.org/all/waterfall?category=3.x.stable&category=3.x.unstable

[serhiy-storchaka]

Thank you, Stefan. This relates to bpo-16957.