Re: package management - common storage while keeping the versions straight

On Tue, 23 Jun 2020, at 23:51, David Mathog wrote:
> What I am after is some method of keeping exactly one copy of each
> package-version in the common area (ie, one might find foo-1.2,
> foo-1.7, and foo-2.3 there), while also presenting only the one
> version of each (let's say foo-1.7) to a particular installed program.
> On linux it might do that by making soft links to the common
> PYTHONPATH area from another directory for which it sets PYTHONPATH
> for the application. Finally, this has to be usable by any account
> which has read execute access to the main directory.

Conda environments work somewhat like this - all the packages are stored in a central place, and the structure of selected ones is replicated using hardlinks in a site-packages directory belonging to the environment. So if your concern is not to waste disk space by storing copies of the same packages, that might be an option.

Thomas
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