Server-side package installation

[joeyballentine]

This PR implements installing packages through the backend, by having the host server kill the worker server, install the dependencies, then start the worker back up. Since it is now using our pip fork, it can also report download progress directly through pip.

This means the frontend no longer handles any pip dependency installation. The only remnant of this is the getFindLinks function used for manual/copy mode, which i will have the backend handle in a future PR.

The way it reports progress right now is a bit jank. I want to redo this in the future but i also wanted to make minimal changes at the moment so I will handle that once I get around to redoing the entire dependency manager page.

This works well enough for now.

[RunDevelopment]

I only briefly looked at this, but did you remove the ability to install/update individual pypi packages? The API only deals with chainner packages.

[joeyballentine]

but did you remove the ability to install/update individual pypi packages?

We only ever installed things on a chaiNNer-package-level basis, so to simplify the process I made it go by chaiNNer package.

Think of the install/uninstall process as installing or installing an extension rather than installing and uninstalling just the dependencies. Maybe in the future an extension would be more than just pypi packages.

Do you have a usecase for being able to manage individual deps like that?

[RunDevelopment]

Do you have a usecase for being able to manage individual deps like that?

PyTorch. Spandrel updates are necessary, pytorch less so. So when we do a pytorch update, I typically stay with the older version purely because I don't want to wait for the download.

[joeyballentine]

But that's never been possible within chaiNNer afaik, how were doing that?

[RunDevelopment]

I happen to contribute to this project, so I get dep changes a little more frequently.

But you're right. I'm probably the only one with this problem, so let's not complicate things. I can still get the pip command and edit it if need be.