[Distutils] patch: solving the two major things that people dislike about setuptools, part 1
Phillip J. Eby
pje at telecommunity.com
Tue Nov 25 20:39:48 CET 2008
At 10:56 AM 11/25/2008 -0500, Mark Sienkiewicz wrote:
> >I think the correct behaviour is to insert the .egg file either
> just before or just after the directory where we found the .pth file.
> >So, instead of
> >we want
>Does this meet your criterion without breaking anything else?
The principle is correct; I'm not sure the implementation is. For
case-insensitive filesystems, sitedir may or may not be normalized,
and sys.path probably isn't. But yes, that's the general idea.
The only reason I didn't take that approach myself is because my head
hurt trying to come up with a provably-correct way to implement this
>IMHO, this is actually not a great patch because it depends on
>knowledge that should be private to distutils, but setuptools is
>already violating that information hiding. (For example, it assumes
>that it is safe to alter sys.path while distutils is loading the
>.pth file; I didn't see that documented anywhere, but we can see
>that it works.)
>b.t.w. You could make easy_install.pth read:
> import setuptools; setuptools.prep_sys_path()
> import setuptools; setuptools.alter_sys_path()
>and then patches to the first/last line would be easier -- they
>would just happen when you install a new setuptools.
It would have to be a separate module, added just for this
purpose... and of course it would introduce a runtime dependency
that would otherwise be unnecessary.
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