[Python-Dev] Python-3 transition in Arch Linux

[Benjamin Peterson]

2010/11/4 Nick Coghlan <ncoghlan at gmail.com>:
> On Thu, Nov 4, 2010 at 2:44 PM, Allan McRae <allan at archlinux.org> wrote:
>> The second case was particularly interesting.  These software would change
>> some of their #! to point at the python2 symlink and leave the rest pointing
>> at python.  Note that python-2.7 itself falls into this category as many
>> files in /usr/lib/python2.7 still have "#!/usr/bin/env python" even when
>> installed with "make altinstall".  I can not remember the exact details, but
>> I recall that some of these files were installed with executable permissions
>> which would be bad, but I need to look into this again now things have
>> calmed down...
>>
>> The packages that did not auto-detect and work with /usr/bin/python2 or
>> /usr/bin/python2.7 mostly required a sed of their shebangs or a patch to any
>> hardcoded /usr/bin/python paths so were easily fixed.
>
> A very interesting exercise, indeed - especially the observation
> regarding software (including python itself) that supports
> installation under alternate names, but doesn't subsequently ensure
> use of that name in its shebang lines.
>
> I just did a quick grep of Lib in my py3k directory, and it looks like
> cgi.py is incorrectly set to use "/usr/local/bin/python", while the
> other files with shebang lines are set to "/usr/bin/env python3" as
> expected.
>
> Tools also had a few discrepancies:
>  scripts/2to3.py: /usr/bin/env python (necessary, I think - I believe
> 2to3 is a 2.x only program)

No, I believe distutils is supposed to patch that up, though.



-- 
Regards,
Benjamin