lsp and completion tweaks

modules/editor/neovim/default.nix

@@ -35,7 +35,7 @@
     # Always run packer.nvim sync
     home.activation.nvimPackerSync =
       config.home-manager.users.${config.user}.lib.dag.entryAfter
-      [ "writeBoundary" ] ''
+      [ "onFilesChange" ] ''
         $DRY_RUN_CMD nvim +PackerSync +qa
       '';
 

modules/editor/neovim/lua/keybinds.lua

@@ -74,7 +74,7 @@ key("n", "gr", telescope.lsp_references, { silent = true })
 key("n", "<Leader>R", vim.lsp.buf.rename, { silent = true })
 key("n", "]e", vim.diagnostic.goto_next, { silent = true })
 key("n", "[e", vim.diagnostic.goto_prev, { silent = true })
-key("n", "<Leader>e", vim.lsp.diagnostic.show_line_diagnostics, { silent = true })
+key("n", "<Leader>e", vim.diagnostic.open_float, { silent = true })
 key("n", "<Leader>E", vim.lsp.buf.code_action, { silent = true })
 
 -- File commands

modules/editor/neovim/lua/packer/completion.lua

@@ -21,11 +21,15 @@ M.packer = function(use)
         config = function()
             local cmp = require("cmp")
             cmp.setup({
+
+                -- Setup snippet completion
                 snippet = {
                     expand = function(args)
                         require("luasnip").lsp_expand(args.body)
                     end,
                 },
+
+                -- Setup completion keybinds
                 mapping = {
                     ["<C-d>"] = cmp.mapping(cmp.mapping.scroll_docs(-4), { "i", "c" }),
                     ["<C-f>"] = cmp.mapping(cmp.mapping.scroll_docs(4), { "i", "c" }),
@@ -36,8 +40,6 @@ M.packer = function(use)
                         })
                         vim.cmd("stopinsert") --- Abort and leave insert mode
                     end,
-                    -- ['<Tab>'] = cmp.mapping(cmp.mapping.select_next_item(), { 'i', 's' }),
-                    -- ['<S-Tab>'] = cmp.mapping(cmp.mapping.select_prev_item(), { 'i', 's' }),
                     ["<CR>"] = cmp.mapping.confirm({
                         behavior = cmp.ConfirmBehavior.Insert,
                         select = true,
@@ -52,11 +54,13 @@ M.packer = function(use)
                         end
                     end, { "i", "s" }),
                 },
+
+                -- Setup completion engines
                 sources = {
                     { name = "nvim_lua" },
                     { name = "nvim_lsp" },
-                    { name = "path" },
                     { name = "luasnip" },
+                    { name = "path" },
                     { name = "buffer", keyword_length = 3, max_item_count = 10 },
                     {
                         name = "rg",
@@ -65,6 +69,30 @@ M.packer = function(use)
                         option = { additional_arguments = "--ignore-case" },
                     },
                 },
+
+                -- Visual presentation
+                formatting = {
+                    fields = { "abbr", "menu" },
+                    format = function(entry, vim_item)
+                        vim_item.menu = ({
+                            luasnip = "[Snippet]",
+                            buffer = "[Buffer]",
+                            path = "[Path]",
+                            rg = "[Grep]",
+                            nvim_lsp = "[LSP]",
+                            nvim_lua = "[Lua]",
+                        })[entry.source.name]
+                        return vim_item
+                    end,
+                },
+
+                -- Docs
+                window = {
+                    completion = cmp.config.window.bordered(),
+                    documentation = cmp.config.window.bordered(),
+                },
+
+                -- Extra features
                 experimental = {
                     native_menu = false, --- Use cmp menu instead of Vim menu
                     ghost_text = true, --- Show preview auto-completion

modules/editor/neovim/lua/packer/lsp.lua

@@ -4,19 +4,32 @@
 
 local M = {}
 
-function on_path(program)
-    return vim.fn.executable(program) == 1
-end
-
 M.packer = function(use)
     -- Language server engine
     use({
         "neovim/nvim-lspconfig",
         requires = { "hrsh7th/cmp-nvim-lsp" },
         config = function()
+            local function on_path(program)
+                return vim.fn.executable(program) == 1
+            end
+
             local capabilities = require("cmp_nvim_lsp").update_capabilities(
                 vim.lsp.protocol.make_client_capabilities()
             )
+            if on_path("lua-language-server") then
+                require("lspconfig").sumneko_lua.setup({
+                    capabilities = capabilities,
+                    -- Turn off errors for vim global variable
+                    settings = {
+                        Lua = {
+                            diagnostics = {
+                                globals = { "vim" },
+                            },
+                        },
+                    },
+                })
+            end
             if on_path("rust-analyzer") then
                 require("lspconfig").rust_analyzer.setup({ capabilities = capabilities })
             end
@@ -50,6 +63,10 @@ M.packer = function(use)
             "neovim/nvim-lspconfig",
         },
         config = function()
+            local function on_path(program)
+                return vim.fn.executable(program) == 1
+            end
+
             require("null-ls").setup({
                 sources = {
                     require("null-ls").builtins.formatting.stylua.with({

modules/programming/lua.nix

@@ -1,8 +1,8 @@
 { config, pkgs, ... }: {
 
-  home-manager.users.${config.user}.home.packages = with pkgs;
-    [
+  home-manager.users.${config.user}.home.packages = with pkgs; [
     stylua # Lua formatter
+    sumneko-lua-language-server # Lua LSP
   ];
 
 }