Auto-enable just-lsp when loading a just file

[mheuvel-dev]

Is your feature related to a problem?

The just-lsp is installed as part of the just community pack, enabled by #1697. However, the LSP isn't loaded automatically when editing a just file. Only the syntax highlighting works out of the box.

One can run Lua vim.lsp.enable('just') for enabling the LSP manually.

Describe the new feature

Can the community-pack auto-enable the just LSP when a just-file is detected?

Additional context

I expected that the just LSP can be toggled with <leader-u-Y>, like with the Lua/Python LSPs. The option is unavailable for the just-lsp.

[Uzaaft]

are u using astronvim v5 or v6?

[mheuvel-dev]

I'm on the latest v5.3.14 release.
Let me know if I can help testing somehow.

[rami3l]

@mheuvel-dev It could be that just-lsp is added too late in mason-lspconfig so the autotrigger is not yet implemented in your distro. AstroNvim v5 is using rather outdated core plugins to ensure compatibility with older Neovim versions.

I've encountered the same problem with fish-lsp, and the problem is automatically resolved when updating AstroNvim to v6.

[mheuvel-dev]

I don’t think it is distribution dependent as I’ve tried it on 3 different ones with latest stable neovim and updated astronvim v5. It is probably this combination. Astronvim v6 isn’t released yet, is it?

[rami3l]

@mheuvel-dev v6 is in prerelease. As long as you are on v5 the core plugins will be blocked from being updated, this has nothing to do with your current Neovim version.

[rami3l]

@mheuvel-dev I just did the search for you, since just-lsp is added in 2025-04 (mason-org/mason-registry#9593), this will require v6 for the autotrigger to work.

As a matter of fact, this is true for any LSP added after 2025-02-14 (https://github.com/mason-org/mason-lspconfig.nvim/releases/tag/v1.32.0), fish-lsp and kotlin-lsp included.