[Feature request] Set custom fantomas path on Fantomas.Client

[ratsclub]

I propose we add a way to provide a custom path for fantomas on Fantomas.Client.

As explained on Ionide's discussion, we can't currently have an option to set a custom path for fantomas on VSCode.

Pros and Cons

Pros

The advantages of making this adjustment to Fantomas are ...

• Allows the user to freely set where fantomas is located while using VSCode
• Nix maintainers can package ionide with fantomas bundled by default (rust-analyzer is an example)

The disadvantages of making this adjustment to Fantomas are ...

• More code complexity

Affidavit (please submit!)

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• [X] I have read the Contribution Guidelines.
• [X] I have searched both open and closed suggestions on this site and believe this is not a duplicate

Please tick all that apply:

• [X] This is not a breaking change to Fantomas
• [X] I or my company would be willing to help implement and/or test this
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[nojaf]

Is it possible to use a version of fantomas specified on the path with your nix thing?

See

https://github.com/fsprojects/fantomas/blob/09635e55f71fc834c4ac2c33381a80f349f472c4/src/Fantomas.Client/FantomasToolLocator.fs#L126-L148

[nojaf]

Maybe having https://github.com/fsprojects/fantomas/issues/3104 would resolve your problem as well.