Re: [poposal for preparing a pep] sharing package installations between virtualenvs

Hi Joni,

thanks for the references.

buildout has been on my inspirations for this proposal.

The historic shift of buildout vs virtualenv+pip as well as build-outs
unfortunate dependency on eggs are some of the pain points that did
happen quite a while back.

If build-out was able to run on wheels and in designated controllable
folders i wouldn't even have to start with my proposal.

Unfortunately buildout as is is not very well aligned with the needs i
perceive on my coworkers/peers/collaborators as well as myself.

-- Ronny

Am 08.10.18 um 11:03 schrieb Joni Orponen:
> On Mon, Oct 8, 2018 at 10:15 AM Thomas Kluyver <[email protected]
> <mailto:[email protected]>> wrote:
>
>     Have you tried using conda envs? Conda avoids duplication by
>     unpacking all packages to a shared directory and then hard-linking
>     them into environments.
>
>     I'm not saying that should preclude doing something similar for
>     virtualenvs, but it's probably worth looking at existing solutions
>     before embarking on a change of this magnitude.
>
>
> Buildout has also done this for quite a long time.
>
> http://www.buildout.org/en/latest/topics/optimizing.html
>
> On Mon, Oct 8, 2018 at 10:22 AM Freddy Rietdijk
> <[email protected] <mailto:[email protected]>> wrote:
>
>     What Conda and Nix do is basically having a store with packages,
>     and then indeed linking them to form environments. While this
>     works, it is important that one is very careful tracing how the
>     packages are built, because not doing so can easily cause trouble
>     in case of modules with extension types.
>
>
> Buildout shares this problem. PIL is a classic example of an egg,
> which can have vastly different runtime based on the compile time.
>
> -- 
> Joni Orponen
>
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