Support devpi inside docker containers

[agjohnson]

Devpi[1] is a great tool to help with intermittent connections. While I am traveling (airports/airplanes/spotty cell service), I find myself wanting a local pypi server. Devpi allows for online and offline usage, and so normal day to day usage on solid internet connections should seed a cache that can be used offline.

The problem blocked this from use is that the docker container would need to be created with additional options, forwarding the host (or another docker container hosting devpi). One option around this might be to create a signal that can be caught before running the docker command to create the container, and allow for alteration of the dictionary that we pass to the docker API. This would allow for a custom RTD plugin that would add a link to a devpi container, or an additional forwarded port/etc.

[humitos]

I think that using devpi is a good idea but maybe overkill for this. I proposed a simpler solution some time ago by adding something similar in #3299 but I left comment at the end why it wasn't working for DockerEnvironments, so I'm adding a new PR at #3556

[humitos]

This was cloed automatically but @agjohnson said my implementation in the PR is not a replacement of this issue. So, I'm reopening it.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.