Re: Fwd: Re: Use of "python" shebang an installation error?

Filipe Laíns <[email protected]> Wed, 22 Jul 2020 14:56:01 +0100

Newsgroups	gmane.comp.python.distutils.devel
Organization	Archlinux
Message-ID	<[email protected]>

On Tue, 2020-07-21 at 14:24 -0700, David Mathog wrote:
> On Tue, Jul 21, 2020 at 2:03 PM Filipe Laíns <[email protected]>
> wrote:
> > On Tue, 2020-07-21 at 13:51 -0700, David Mathog wrote:
> > > biopython-1.77, for instance, when installed into a virtualenv
> > > with
> > > pip3, has many of these shebangs:
> > > 
> > >    #!/usr/bin/env python
> > > 
> > Is it being installed as an egg or wheel? Can you check what
> > happens
> > when you pass --use-pep517 to the pip install command (to force
> > installing as a wheel)?
> > 
> 
> It is wheel, it creates a directory
> 
>   biopython/lib/python3.6/site-packages/biopython-1.77.dist-info
> 
> when installed either of these ways:
> 
> pip3 install biopython
> pip3 install biopython --use-pep517
> 
> Either way it has the same shebang in the files listed a few posts
> up.
> 
> Thanks,
> 
> David Mathog

You've fallen off-list again.

The shebang handling for wheels is very well defined[1].

It looks like those shebangs come from biopython so it's their bug.

No file a python package is supposed to be executed directly, so they
shouldn't really have shebangs. The files that are superposed to be
executed directly should be defined as scripts and have a #!python
shebang so that the wheel installer can do its job properly.

So unfortunately I think in most of the packages you are having issues
with, the bug comes from the package upstream :/

[1] https://www.python.org/dev/peps/pep-0427/#recommended-installer-features

Filipe Laíns

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