feat: adding rust lsp to neovim

home/irl.nix

@@ -19,12 +19,15 @@ in
     home.packages = with pkgs; [
       fish
       neofetch
+      rust-analyzer
       starship
       tree
     ];
     home.shellAliases = {
       hms =
-        "home-manager switch --flake ~/.config/nix-configs#irl" + (if cfg.gui-packages then "-gui" else "");
+        "home-manager switch --flake ~/.config/nix-configs#irl"
+        + (if cfg.gui-packages then "-gui" else "")
+        + "-${pkgs.system}";
     };
     programs.bash = {
       enable = true;
@@ -91,8 +94,47 @@ in
       vimdiffAlias = true;
       plugins = with pkgs.vimPlugins; [
         bufferline-nvim
+        nvim-lspconfig
         nvim-treesitter.withAllGrammars
       ];
+      extraLuaConfig = ''
+        vim.lsp.config('rust_analyzer', {
+          settings = {
+            ['rust-analyzer'] = {},
+          },
+        })
+        vim.api.nvim_create_autocmd('LspAttach', {
+          group = vim.api.nvim_create_augroup('my.lsp', {}),
+          callback = function(args)
+            local client = assert(vim.lsp.get_client_by_id(args.data.client_id))
+            if client:supports_method('textDocument/implementation') then
+              -- Create a keymap for vim.lsp.buf.implementation ...
+            end
+
+            -- Enable auto-completion. Note: Use CTRL-Y to select an item. |complete_CTRL-Y|
+            if client:supports_method('textDocument/completion') then
+              -- Optional: trigger autocompletion on EVERY keypress. May be slow!
+              -- local chars = {}; for i = 32, 126 do table.insert(chars, string.char(i)) end
+              -- client.server_capabilities.completionProvider.triggerCharacters = chars
+
+              vim.lsp.completion.enable(true, client.id, args.buf, {autotrigger = true})
+            end
+
+            -- Auto-format ("lint") on save.
+            -- Usually not needed if server supports "textDocument/willSaveWaitUntil".
+            if not client:supports_method('textDocument/willSaveWaitUntil')
+                and client:supports_method('textDocument/formatting') then
+              vim.api.nvim_create_autocmd('BufWritePre', {
+                group = vim.api.nvim_create_augroup('my.lsp', {clear=false}),
+                buffer = args.buf,
+                callback = function()
+                  vim.lsp.buf.format({ bufnr = args.buf, id = client.id, timeout_ms = 1000 })
+                end,
+              })
+            end
+          end,
+        })
+      '';
     };
     programs.starship = {
       enable = true;