add nix ftplugin

lua/plugins/lspconfig.lua

@@ -26,6 +26,62 @@ return {
             cmd = { vim.fn.stdpath("config") .. "/shell/clangd-direnv.sh" }
         })
 
+        -- vim.lsp.config("julials", {
+        --     capabilities = capabilities,
+        --     cmd = { "julia", "--startup-file=no", "--history-file=no", "-e", "using LanguageServer; runserver()" }
+        -- })
+
+        local cmd = {
+            'julia',
+            '--startup-file=no',
+            '--history-file=no',
+            '-e',
+            [[
+                # Load LanguageServer.jl: attempt to load from ~/.julia/environments/nvim-lspconfig
+                # with the regular load path as a fallback
+                ls_install_path = joinpath(
+                    get(DEPOT_PATH, 1, joinpath(homedir(), ".julia")),
+                    "environments", "nvim-lspconfig"
+                )
+                pushfirst!(LOAD_PATH, ls_install_path)
+                using LanguageServer
+                popfirst!(LOAD_PATH)
+                depot_path = get(ENV, "JULIA_DEPOT_PATH", "")
+                project_path = let
+                    dirname(something(
+                        ## 1. Finds an explicitly set project (JULIA_PROJECT)
+                        Base.load_path_expand((
+                            p = get(ENV, "JULIA_PROJECT", nothing);
+                            p === nothing ? nothing : isempty(p) ? nothing : p
+                        )),
+                        ## 2. Look for a Project.toml file in the current working directory,
+                        ##    or parent directories, with $HOME as an upper boundary
+                        Base.current_project(),
+                        ## 3. First entry in the load path
+                        get(Base.load_path(), 1, nothing),
+                        ## 4. Fallback to default global environment,
+                        ##    this is more or less unreachable
+                        Base.load_path_expand("@v#.#"),
+                    ))
+                end
+                @info "Running language server" VERSION pwd() project_path depot_path
+                server = LanguageServer.LanguageServerInstance(stdin, stdout, project_path, depot_path)
+                server.runlinter = true
+                run(server)
+              ]],
+        }
+
+        vim.lsp.config("julials", {
+            capabilities = capabilities,
+            cmd = cmd,
+            root_dir = function(bufnr, on_dir)
+                local fname = vim.api.nvim_buf_get_name(bufnr)
+                local root = vim.fs.root(fname, { "Project.toml", "JuliaProject.toml" })
+                on_dir(root or vim.fn.getcwd())
+            end,
+        })
+
         vim.lsp.enable("hls")
+        vim.lsp.enable("julials")
     end,
 }