Add support for MATLAB solver

[paquiteau]

This add support for MATLAB-based solver, and is based on the matlab-engine package.

I also provide a dummy example of PGD solver using MATLAB.

As mentioned in #606 , the CI is the main issue here. Running matlab from the engine in CI is not supported by Mathworks
¹ and would required to have a self hosted runner with a MATLAB license.

This make the CI fail for now.

Footnotes

1. https://github.com/matlab-actions/setup-matlab/issues/22 ↩

[agramfort]

cool ! any chance to have such a runner?

[paquiteau]

Creating a self hosting runner is pretty easy ¹, choosing who is going to pay for it and the associated MATLAB license is harder (short answer: not me) . Then its a matter of switching the CI to the self hosted runner in the repo setting.

For now I have disable the test running the solver 'matlab-pgd' in the dummy benchmark.

Footnotes

1. https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/about-self-hosted-runners ↩

[tomMoral]

It seems to me that github-action allows to use matlab for testing purposes without license on public repo no?
https://github.com/matlab-actions#setup-matlab

[paquiteau]

Let me try, but the issue I mentioned in the opening post does not really give hope 😕

[tomMoral]

It seems to crash big time indeed ^^

[paquiteau]

So the CI should now pass, as the MATLAB solver is not run if we can't find a matlab installation.
If a dedicated runner can be set up that would be ideal but that's the best I can do for now.

[codecov-commenter]

Codecov Report

Merging #612 (82b04c7) into main (c1f1e60) will increase coverage by 0.13%.
The diff coverage is 46.66%.

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@@            Coverage Diff             @@
##             main     #612      +/-   ##
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+ Coverage   54.91%   55.05%   +0.13%     
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  Files          44       45       +1     
  Lines        2846     2870      +24     
  Branches      523      528       +5     
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+ Hits         1563     1580      +17     
- Misses       1165     1173       +8     
+ Partials      118      117       -1