Support for local CoPilot

[janEbert]

Hey, I'd like to do something similar to https://github.com/danielgross/localpilot, which sets github.copilot.advanced.debug.{testOverrideProxyUrl,overrideProxyUrl} to a different URL in settings.json in order to avoid having to access GitHub.

I was unable to find any way to set settings.json variables in the ELisp code. I was also unsuccessful in hardcoding the appropriate values in agent.js.

What pieces are missing to avoid the proprietary remote APIs? Or would maybe just adding a way to pass settings into the JavaScript code be enough? If the functionality for passing settings already exists, I'd be super happy if you could point me to it.

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Including debug messages I added, I get the following output messages upon M-x copilot-diagnose:

Copilot agent started.
copilot--request args: ('initialize '(:capabilities (:workspace (:workspaceFolders t))))
copilot--async-request args: nil
copilot--async-request args: (:success-fn (lambda (_) (message Copilot OK.)) :error-fn (lambda (err) (message Copilot error: %S err)) :timeout-fn (lambda nil (message Copilot agent timeout.)))
Copilot error: (:code 1000 :message "Not authenticated: NotSignedIn")

The proxy I tried to hardcode in agent.js does not seem to be hit at all.

[janEbert]

I suppose danielgross/localpilot#12 may be the answer to the errors I'm facing. Even overriding the proxies, I get walled off by (as of yet) unavoidable authentification.

[zerolfx]

@janEbert This plugin is built on copilot.vim. If the local copilot works with copilot.vim but not with copilot.el, I can look into it.

[janEbert]

I believe it to be an issue with the JavaScript until further notice. :)
Thanks!