Adds two internal per-server options: `packages.prefix` & `packages.suffix`.
These options allow the server module to install multiple packages, and
control which end up being prefixed or suffixed on the PATH.
This simplifies the propagating code in `modules/lsp/servers/default.nix`,
which can now zip up the enabled server `packages` attrs.
Adding a module in the following places will import the module into that
specific server's submodule.
This allows creating server-specific options.
Added a test case to ensure all custom modules correspond to an actual
server option to avoid accidental dead code.
`shorthandOnlyDefinesConfig` is true by default for `lib.types.submodule`,
and false by default for `lib.types.submoduleWith` and `lib.evalModules`.
Since we rely on it for our `lsp.servers.*.config` option, let's enable
it explicitly.
The `lsp.servers.<name>` option description links to the server's
homepage if it can evaluate the default package's `meta.homepage`.
However, users may evaluate this description, e.g. when building NixOS
docs with `documentation.nixos.includeAllModules`. Further, users may
have a different nixpkgs revisions to ours. Therefore, we need to allow
for the package not being in nixpkgs.
Since `mkPackageOption` will throw in the default, we can catch it with
`tryEval`.
- Re-implement setup wrapping and capabilities to preserve existing
behaviour
- Alias `package` options to new lsp module
- Alias `packageFallback` options to new lsp module
- Alias `preConfig` and `postConfig` to `lsp.luaConfig`
