nvim: Remove lsp-zero in favor of built-in lsp support

_config/nvim/lsp/luals.lua

@@ -0,0 +1,19 @@
+return {
+    -- Command and arguments to start the server.
+    cmd = { 'lua-language-server' },
+    -- Filetypes to automatically attach to.
+    filetypes = { 'lua' },
+    -- Sets the "workspace" to the directory where any of these files is found.
+    -- Files that share a root directory will reuse the LSP server connection.
+    -- Nested lists indicate equal priority, see |vim.lsp.Config|.
+    root_markers = { { '.luarc.json', '.luarc.jsonc' }, '.git' },
+    -- Specific settings to send to the server. The schema is server-defined.
+    -- Example: https://raw.githubusercontent.com/LuaLS/vscode-lua/master/setting/schema.json
+    settings = {
+        Lua = {
+            runtime = {
+                version = 'LuaJIT',
+            }
+        }
+    }
+}

_config/nvim/plugin/lsp.lua

@@ -1,49 +1,58 @@
-vim.diagnostic.config({ virtual_text = true })
+vim.lsp.enable('ts_ls')
+vim.lsp.enable('luals')
+vim.lsp.enable('clangd')
 
-local lsp = require('lsp-zero').preset({})
+-- LSP keymaps to mimic lsp-zero's defaults
+-- Source for lsp-zero defaults: see note at bottom
 
-lsp.on_attach(function(client, bufnr)
-  -- see :help lsp-zero-keybindings
-  -- to learn the available actions
-  lsp.default_keymaps({buffer = bufnr})
-end)
+-- Create the autocommand once
+vim.api.nvim_create_autocmd('LspAttach', {
+    group = vim.api.nvim_create_augroup('UserLspKeymaps', { clear = true }),
+    callback = function(ev)
+        local buf = ev.buf
 
--- " (Optional) Configure lua language server for neovim
-require('lspconfig').lua_ls.setup(lsp.nvim_lua_ls())
+        local function map(mode, lhs, rhs, desc)
+            vim.keymap.set(mode, lhs, rhs, { buffer = buf, silent = true, noremap = true, desc = desc })
+        end
 
--- You need to setup `cmp` after lsp-zero
-local cmp = require('cmp')
-local cmp_action = require('lsp-zero').cmp_action()
+        -- Hover
+        map('n', 'K', vim.lsp.buf.hover, 'LSP: Hover')
 
-cmp.setup({
-  mapping = {
-    -- `Enter` key to confirm completion
-    ['<CR>'] = cmp.mapping.confirm({select = false}),
+        -- Go to...
+        map('n', 'gd', vim.lsp.buf.definition, 'LSP: Go to Definition')
+        map('n', 'gD', vim.lsp.buf.declaration, 'LSP: Go to Declaration')
+        map('n', 'gi', vim.lsp.buf.implementation, 'LSP: Go to Implementation')
+        map('n', 'go', vim.lsp.buf.type_definition, 'LSP: Go to Type Definition')
+        map('n', 'gr', vim.lsp.buf.references, 'LSP: List References')
 
-    -- Ctrl+Space to trigger completion menu
-    ['<C-Space>'] = cmp.mapping.complete(),
+        -- Signatures
+        map('n', 'gs', vim.lsp.buf.signature_help, 'LSP: Signature Help')
 
-    -- Navigate between snippet placeholder
-    ['<C-f>'] = cmp_action.luasnip_jump_forward(),
-    ['<C-b>'] = cmp_action.luasnip_jump_backward(),
-  }
-})
-
-lsp.ensure_installed({
-    'ts_ls',
-})
-
-local null_ls = require('null-ls')
-local null_opts = lsp.build_options('null-ls', {})
-
-null_ls.setup({
-  on_attach = function(client, bufnr)
-    null_opts.on_attach(client, bufnr)
-    --- you can add more stuff here if you need it
+        -- Rename / Actions / Format (normal + visual)
+        map('n', '<F2>', vim.lsp.buf.rename, 'LSP: Rename')
+        map({ 'n', 'x' }, '<F3>', function()
+            vim.lsp.buf.format({ async = false })
+        end, 'LSP: Format')
+        map({ 'n', 'x' }, '<F4>', vim.lsp.buf.code_action, 'LSP: Code Action')
     end,
-  sources = {
-    null_ls.builtins.formatting.black,
-  }
 })
 
-lsp.setup()
+require("mason").setup()
+require("mason-lspconfig").setup {
+    ensure_installed = { "rust_analyzer" },
+}
+
+local cmp = require('cmp')
+local cmp_nvim_lsp = require('cmp_nvim_lsp')
+
+vim.opt.completeopt = { 'menu', 'menuone', 'noselect' }
+cmp.setup({
+    sources = {
+        { name = 'nvim_lsp' },
+    },
+    mapping = cmp.mapping.preset.insert({
+        ['<CR>'] = cmp.mapping.confirm({ select = false }),
+    }),
+})
+
+cmp_nvim_lsp.default_capabilities()

_config/nvim/plugin/rust.lua

@@ -1,13 +1,10 @@
-local rt = require("rust-tools")
-
-rt.setup({
+require('rust-tools').setup({
     server = {
         on_attach = function(_, bufnr)
-      -- Hover actions
-      vim.keymap.set("n", "<C-space>", rt.hover_actions.hover_actions, { buffer = bufnr })
-
-      -- Code action groups
-      vim.keymap.set("n", "<Leader>a", rt.code_action_group.code_action_group, { buffer = bufnr })
+            -- Example keymaps
+            vim.keymap.set("n", "<C-space>", require("rust-tools").hover_actions.hover_actions, { buffer = bufnr })
+            vim.keymap.set("n", "<Leader>a", require("rust-tools").code_action_group.code_action_group,
+                { buffer = bufnr })
         end,
     },
 })

_config/nvim/plugins.vim

@@ -4,14 +4,7 @@ Plug 'tpope/vim-fugitive'
 Plug 'vim-syntastic/syntastic'
 Plug 'junegunn/fzf.vim'
 Plug 'tpope/vim-surround'
-" Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
-" Plug 'deoplete-plugins/deoplete-clang'
-" Plug 'deoplete-plugins/deoplete-jedi'
-" Plug 'deoplete-plugins/deoplete-go', { 'do': 'make'}
-" Plug 'carlitux/deoplete-ternjs', { 'do': 'npm install tern'}
-" Plug 'tbodt/deoplete-tabnine', { 'do': './install.sh' }
 Plug 'mg979/vim-visual-multi'
-" Plug 'fatih/vim-go', { 'do': ':GoUpdateBinaries' }
 " Plug 'ndmitchell/ghcid', { 'rtp': 'plugins/nvim' }
 Plug 'luochen1990/rainbow'
 " Plug 'wlangstroth/vim-racket'
@@ -24,18 +17,14 @@ Plug 'neovim/nvim-lspconfig'
 Plug 'williamboman/mason.nvim'
 Plug 'williamboman/mason-lspconfig.nvim'
 
-Plug 'nvim-lua/plenary.nvim'
-Plug 'nvimtools/none-ls.nvim'
-
 " Autocompletion
 Plug 'hrsh7th/nvim-cmp'
 Plug 'hrsh7th/cmp-nvim-lsp'
 Plug 'L3MON4D3/LuaSnip'
 
-Plug 'VonHeikemen/lsp-zero.nvim', {'branch': 'v2.x'}
-
 Plug 'simrat39/rust-tools.nvim'
 
+" Debugging
 Plug 'mfussenegger/nvim-dap'
 Plug 'rcarriga/nvim-dap-ui'
 Plug 'nvim-neotest/nvim-nio'