feat(nvim): add base LSP config via Mason : )

home.nix

@@ -14,7 +14,7 @@ let
     ./home/gtk.nix
     ./home/i3status-rust.nix
     ./home/lf.nix
-    ./home/neovim.nix
+    ./home/neovim
     ./home/nushell.nix
     ./home/picom.nix
     ./home/redshift.nix

home/neovim.nix → home/neovim/default.nix

@@ -599,6 +599,8 @@ in
       vim-numbertoggle
       {
         plugin = mason-nvim; # Automatically install LSP servers
+        config = builtins.readFile ./lsp.lua;
+        type = "lua";
       }
       {
         plugin = mason-lspconfig-nvim; # Automatically install LSP servers

home/neovim/lsp.lua

@@ -0,0 +1,87 @@
+-- [[ Configure LSP ]]
+--  This function gets run when an LSP connects to a particular buffer.
+local on_attach = function(_, bufnr)
+  local nmap = function(keys, func, desc)
+    if desc then
+      desc = 'LSP: ' .. desc
+    end
+
+    vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
+  end
+
+  nmap('<localleader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
+  nmap('<localleader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')
+
+  nmap('gd', require('telescope.builtin').lsp_definitions, '[G]oto [D]efinition')
+  nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
+  nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
+  nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
+  nmap('<localleader>t', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
+  nmap('<localleader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
+  nmap('<localleader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')
+
+  nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
+  nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')
+
+  -- Workspace Fu
+  nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
+  nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
+  nmap('<leader>wl', function()
+    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+  end, '[W]orkspace [L]ist Folders')
+
+  -- Create a command `:Format` local to the LSP buffer
+  vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
+    vim.lsp.buf.format()
+  end, { desc = 'Format current buffer with LSP' })
+end
+
+-- Document workspace keymap
+require('which-key').register {
+  ['<leader>w'] = { name = '[W]orkspace', _ = 'which_key_ignore' },
+}
+
+-- mason-lspconfig requires that these setup functions are called in this order
+-- before setting up the servers.
+require('mason').setup()
+require('mason-lspconfig').setup()
+
+local servers = {
+  -- clangd = {},
+  -- gopls = {},
+  -- pyright = {},
+  -- rust_analyzer = {},
+  -- tsserver = {},
+  -- html = { filetypes = { 'html', 'twig', 'hbs'} },
+
+  lua_ls = {
+    Lua = {
+      workspace = { checkThirdParty = false },
+      telemetry = { enable = false },
+      diagnostics = { disable = { 'missing-fields' } },
+    },
+  },
+}
+
+-- Setup neovim lua configuration
+require('neodev').setup()
+
+-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
+
+-- Ensure the servers above are installed
+local mason_lspconfig = require 'mason-lspconfig'
+mason_lspconfig.setup {
+  ensure_installed = vim.tbl_keys(servers),
+}
+mason_lspconfig.setup_handlers {
+  function(server_name)
+    require('lspconfig')[server_name].setup {
+      capabilities = capabilities,
+      on_attach = on_attach,
+      settings = servers[server_name],
+      filetypes = (servers[server_name] or {}).filetypes,
+    }
+  end,
+}