feat: setup nvim-cmp for autocompletion and lspconfig

README.md

@@ -4,5 +4,6 @@
 ## Requirements
 * ripgrep - for telescope
 * [A patched font](https://www.nerdfonts.com/) - for dev icons
+* [Sumenko language server](https://github.com/sumneko/lua-language-server/wiki/Build-and-Run-(Standalone))
 
 

lua/bindings.lua

@@ -1,18 +1,8 @@
 local map = require 'utils.map'
 
-local silent = {silent = true}
-
 -- Window movement
 map('n', '<c-h>', '<c-w>h')
 map('n', '<c-j>', '<c-w>j')
 map('n', '<c-k>', '<c-w>k')
 map('n', '<c-l>', '<c-w>l')
 
-
--- Toggle whitespace characters
-map('n', '<leader>tw', ':setlocal list!<cr>')
-
-
--- Toggle numbers and sign column
-map('n', '<leader>tn', ':setlocal relativenumber!<cr>:setlocal number!<cr>')
-

lua/config/cmp.lua

@@ -0,0 +1,71 @@
+-- Setup nvim-cmp.
+local lspkind = require('lspkind')
+lspkind.init()
+
+local cmp = require('cmp')
+
+cmp.setup{
+	completion = { completeopt = 'menu,menuone,noinsert' },
+	snippet = {
+		expand = function(args)
+			require("luasnip").lsp_expand(args.body)
+		end,
+	},
+	mapping = {
+		-- ['<C-n>'] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
+		-- ['<C-p>'] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
+		['<C-d>'] = cmp.mapping.scroll_docs(-4),
+		['<C-f>'] = cmp.mapping.scroll_docs(4),
+		['<C-Space>'] = cmp.mapping.complete(),
+		['<C-e>'] = cmp.mapping.close(),
+		['<CR>'] = cmp.mapping.confirm({
+			behavior = cmp.ConfirmBehavior.Replace,
+			select = true,
+		})
+	},
+	sources = {
+		{ name = 'nvim_lua' },
+
+		{ name = 'nvim_lsp', max_item_count = 20 },
+		{ name = 'cmp_tabnine' },
+		{ name = 'path' },
+		{ name = 'luasnip' },
+		{ name = 'buffer', max_item_count = 10, keyword_length = 5 },
+	},
+	formatting = {
+		format = lspkind.cmp_format{
+			with_text = true,
+			menu = {
+				buffer = "[buf]",
+				cmp_tabnine = "[tab9]",
+        nvim_lsp = "[lsp]",
+        nvim_lua = "[api]",
+        path = "[path]",
+        luasnip = "[snip]",
+			}
+		}
+	},
+	experimental = {
+		native_menu = false,
+		ghost_text = true,
+	}
+}
+
+
+-- Use buffer source for `/`.
+cmp.setup.cmdline('/', {
+	sources = {
+		{ name = 'buffer' }
+	}
+})
+
+-- Use cmdline & path source for ':'.
+-- cmp.setup.cmdline(':', {
+-- 	sources = cmp.config.sources({
+-- 		{ name = 'path' }
+-- 	}, {
+-- 		{ name = 'cmdline' }
+-- 	})
+-- })
+
+

lua/config/lspconfig.lua

@@ -0,0 +1,126 @@
+local lspconfig = require('lspconfig')
+local M = {}
+
+-- debounce_text_changes = delay, between changing something and lsp updating
+M.flags = { debounce_text_changes = 150 }
+
+M.default_settings = {
+	Lua = {
+		runtime = {
+			-- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
+			version = 'LuaJIT',
+			-- Setup your lua path
+			path = vim.split(package.path, ';')
+		},
+		diagnostics = {
+			-- Get the language server to recognize the `vim` global
+			globals = {'vim', 'packer_plugins'}
+		},
+		workspace = {
+			-- Make the server aware of Neovim runtime files
+			library = vim.api.nvim_get_runtime_file("", true)
+		},
+		telemetry = { enable = false }
+	}
+}
+
+-- Use an on_attach function to only map the following keys
+-- after the language server attaches to the current buffer
+---@diagnostic disable-next-line: unused-local
+local function on_attach(client, bufnr)
+  -- Mappings.
+  local opts = { noremap = true, silent = true }
+
+  local function buf_set_keymap(mode, lhs, rhs) vim.api.nvim_buf_set_keymap(bufnr, mode, lhs, rhs, opts) end
+  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
+
+  -- Enable completion triggered by <c-x><c-o>
+  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- See `:help vim.lsp.*` for documentation on any of the below functions
+  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>')
+  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>')
+  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>')
+  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>')
+  buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>')
+  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>')
+  -- buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>')
+  -- buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>')
+  -- buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>')
+  -- buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>')
+  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>')
+  buf_set_keymap('n', '<space>ca', '<cmd>lua vim.lsp.buf.code_action()<CR>')
+  buf_set_keymap('n', '<space>d', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>')
+  -- buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>')
+  -- buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>')
+  -- buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>')
+  buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.formatting()<CR>')
+
+	-- " auto-format
+	-- autocmd BufWritePre *.js lua vim.lsp.buf.formatting_sync(nil, 100)
+	-- autocmd BufWritePre *.jsx lua vim.lsp.buf.formatting_sync(nil, 100)
+	-- autocmd BufWritePre *.py lua vim.lsp.buf.formatting_sync(nil, 100)
+end
+
+
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+if packer_plugins['cmp-nvim-lsp'] and packer_plugins['cmp-nvim-lsp'].loaded then
+	capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
+end
+
+local function on_init(initialize_params, config)
+	-- print(vim.inspect(capabilities))
+	-- print(vim.inspect(config))
+end
+
+-- https://github.com/sumneko/lua-language-server/wiki/Build-and-Run-(Standalone)
+local function getSumnekoPaths()
+	USER = vim.fn.expand('$USER')
+
+	if vim.fn.has("mac") == 1 then
+		local sumneko_root_path = "/Users/" .. USER .. "/.config/nvim/lua-language-server"
+		local sumneko_binary = "/Users/" .. USER .. "/.config/nvim/lua-language-server/bin/macOS/lua-language-server"
+		return sumneko_root_path, sumneko_binary
+	elseif vim.fn.has("unix") == 1 then
+		local sumneko_root_path = "/home/" .. USER .. "/.config/nvim/lua-language-server"
+		local sumneko_binary = "/home/" .. USER .. "/.config/nvim/lua-language-server/bin/Linux/lua-language-server"
+		return sumneko_root_path, sumneko_binary
+	end
+end
+
+local function setupLuaServer()
+	local sumneko_root_path, sumneko_binary = getSumnekoPaths()
+
+	if not sumneko_root_path then
+		print("Unsupported system for sumneko")
+		return
+	end
+
+	lspconfig.sumneko_lua.setup {
+		cmd = {sumneko_binary, "-E", sumneko_root_path .. "/main.lua"},
+    on_attach = on_attach,
+		filetypes = {"lua"},
+		capabilities = capabilities,
+		on_init = on_init,
+    flags = M.flags,
+		settings = M.default_settings
+	}
+end
+
+setupLuaServer()
+
+-- Use a loop to conveniently call 'setup' on multiple servers and
+-- map buffer local keybindings when the language server attaches
+local servers = { 'tsserver' }
+for _, name in ipairs(servers) do
+  lspconfig[name].setup {
+    on_attach = on_attach,
+		capabilities = capabilities,
+		on_init = on_init,
+    flags = M.flags,
+		settings = M.default_settings
+  }
+end
+
+return M
+

lua/config/tabnine.lua

@@ -0,0 +1,10 @@
+local tabnine = require('cmp_tabnine.config')
+
+tabnine:setup{
+	max_lines = 1000,
+	max_num_results = 20,
+	sort = true,
+	run_on_every_keystroke = true,
+	snippet_placeholder = '..'
+}
+

lua/options.lua

@@ -9,6 +9,9 @@ cmd [[filetype plugin on]]
 local buffer = { o, bo }
 local window = { o, wo }
 
+-- List of possible completion options
+opt('completeopt', 'menu,menuone,noselect')
+
 -- Pseudo transparent popup window
 opt('pumblend', 15)
 cmd [[highlight PmenuSel blend=0]]

lua/plugins.lua

@@ -10,7 +10,7 @@ local function usePlugins(use)
 	-- Reload lua configs
 	use {
 		'famiu/nvim-reload',
-		requires = { 'nvim-lua/plenary.nvim' },
+		requires = 'nvim-lua/plenary.nvim',
 		config = [[require 'config.reload']]
 	}
 
@@ -69,9 +69,36 @@ local function usePlugins(use)
 	-- UNIX commands
 	use 'tpope/vim-eunuch'
 
+	-- Snippets
+	use 'L3MON4D3/LuaSnip'
+
 	-- Movement utilities
 	use 'tpope/vim-unimpaired'
 
+	-- LSP config
+	use {
+		'neovim/nvim-lspconfig',
+		config = [[require 'config.lspconfig']],
+	}
+
+	-- Completion
+	use { 'onsails/lspkind-nvim' }
+	use {
+		'hrsh7th/nvim-cmp',
+		-- requires = 'onsails/lspkind-nvim', -- For some reason breaks with this line
+		requires = {'saadparwaiz1/cmp_luasnip'},
+		after = 'lspkind-nvim',
+		config = [[require 'config.cmp']],
+		event = 'InsertEnter *'
+	}
+	use {'tzachar/cmp-tabnine', after = 'nvim-cmp', run='./install.sh', requires = 'hrsh7th/nvim-cmp', config = [[require 'config.tabnine']]}
+	use {'hrsh7th/cmp-nvim-lsp', requires = {'hrsh7th/nvim-cmp', 'nvim-lspconfig'}}
+	use {'hrsh7th/cmp-nvim-lua', after = 'nvim-cmp', requires = 'hrsh7th/nvim-cmp'}
+	use {'hrsh7th/cmp-buffer', after = 'nvim-cmp', requires = 'hrsh7th/nvim-cmp'}
+	use {'hrsh7th/cmp-path', after = 'nvim-cmp', requires = 'hrsh7th/nvim-cmp'}
+	use {'hrsh7th/cmp-cmdline', after = 'nvim-cmp', requires = 'hrsh7th/nvim-cmp'}
+	use {'saadparwaiz1/cmp_luasnip', after = 'nvim-cmp', requires = {'L3MON4D3/LuaSnip', 'nvim-cmp'}}
+
 	-- Color themes
 	use 'morhetz/gruvbox'
 	use 'tomasr/molokai'