[Distutils] Versioned entry points
ncoghlan at gmail.com
Fri Mar 28 22:06:35 CET 2014
On 29 Mar 2014 06:20, "Vinay Sajip" <vinay_sajip at yahoo.co.uk> wrote:
> > Does anyone have any thoughts?
> Note that there is one situation where scripts for multiple Python
versions reside in the same directory: per-user site-packages (PEP 370). If
you install a package which has scripts and you don't write versioned
scripts, a second installation of that package (with a different Python
version) will cause the first script to be overwritten. Much of the time
this won't matter, but there might be scenarios where it does.
> It may also give a problem when uninstalling, or when verifying the
installation (as the hash of an overwritten script may not match what's
expected, as per the original installation).
> To avoid overwriting, one would need to write versioned scripts *only* :-)
Speaking of which, it's worth describing exactly what we had to do for
ensurepip. That has 3 configurations:
POSIX system default: pip3, pip3.4
Windows & venv default: pip, pip3, pip3.4
Alt install: pip3.4
There's currently an issue where "make altinstall && make install" is
slightly broken, as it won't add the missing "pip3" command.
So consider me in the school that suggests this be a standard installer
feature that can be applied to any entry point script, rather than
something that varies by project.
> Vinay Sajip
> Distutils-SIG maillist - Distutils-SIG at python.org
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