Cannot install ocaml-lsp?

[novemberkilo]

Hi - I cannot install ocaml-lsp via Mason. I am reasonably sure that the issue is not with the ocamllsp server (as I am able to install and use that locally with vscode) and I'm curious to know if the issue I am running into is something local to Mason.

Here's what I am doing:

1. :MasonInstall ocaml-lsp
2. I see Mason attempting to do this: opam install --destdir=. --yes --verbose ocaml-lsp-server.1.10.2
3. This fails with spawn: opam failed with exit code 20 and signal 0.

Some observations:

1. In my local opam switch I have ocaml-lsp-server installed. I would have expected Mason to just detect this and not try and install it again.
2. The version of ocaml-lsp-server is now 1.15.1 -- is there a configuration issue that is causing Mason to try and install an older version? Also, is this perhaps the cause for the failure?

[williamboman]

Hey! There's an issue template for package installation issues that asks for more information, please use that one if you're still having issues 🙏!

• In my local opam switch I have ocaml-lsp-server installed. I would have expected Mason to just detect this and not try and install it again.

Hm, why would you :MasonInstall it if you already have it installed and prefer to use that installation?

2. The version of ocaml-lsp-server is now 1.15.1 -- is there a configuration issue that is causing Mason to try and install an older version? Also, is this perhaps the cause for the failure?

Package versions are kept up to date via Renovate in https://github.com/mason-org/mason-registry. Unfortunately Renovate doesn't support Opam packages, so these will be have to be updated manually (PRs always welcome!).

[williamboman]

I've gone ahead and updated the two opam packages that exists in mason here:

• bump(ocamlformat): update to 0.25.1 mason-org/mason-registry#1852
• bump(ocaml-lsp): update to 1.15.1-5.0 mason-org/mason-registry#1853

Maybe the version upgrade fixes your issues.

[novemberkilo]

Thanks for the quick updates @williamboman - I can see that Mason has picked up the updates but continue to get the spawn: opam failed with exit code 20 and signal 0. error. I'll see about opening an issue using the template you mentioned. Thanks.

[Phamier]

@novemberkilo Same here

[Trzyq0712]

I've had the same issue. Instead, you can manually install the appropriate ocaml lsp server (using opam for example - opam install ocaml-lsp-server) and just skip using Mason in this case, i.e. use lspconfig directly.