nvim: Add cmp plugin

nvim/init.lua

@@ -41,6 +41,10 @@ plug("JulesWang/css.vim")
 plug("NoahTheDuke/vim-just")
 plug("cespare/vim-toml", {branch="main"})
 plug("hashivim/vim-terraform")
+plug("hrsh7th/cmp-nvim-lsp")
+plug("hrsh7th/cmp-vsnip")
+plug("hrsh7th/nvim-cmp")
+plug("hrsh7th/vim-vsnip")
 plug("junegunn/fzf", {["do"]=vim.fn["fzf#install"]})
 plug("junegunn/fzf.vim")
 plug("justinj/vim-pico8-syntax")
@@ -61,11 +65,50 @@ plug("xtfc/mold.vim")
 
 vim.fn["plug#end"]()
 
+-- LSP config
 local lspconfig = require("lspconfig")
 lspconfig.pyright.setup({})
 -- lspconfig.lua_ls.setup({})
 
+-- disable treesitter for lua files
 vim.api.nvim_create_autocmd(
   {"BufEnter"},
   {pattern = "*.lua", callback = function(ev) vim.treesitter.stop() end}
 )
+
+
+-- autocomplete
+local cmp = require("cmp")
+
+cmp.setup({
+  snippet = {
+    -- REQUIRED - you must specify a snippet engine
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
+      -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
+      -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
+      -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
+      -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
+    end,
+  },
+  window = {
+    -- completion = cmp.config.window.bordered(),
+    -- documentation = cmp.config.window.bordered(),
+  },
+  mapping = cmp.mapping.preset.insert({
+    ['<C-b>'] = cmp.mapping.scroll_docs(-4),
+    ['<C-f>'] = cmp.mapping.scroll_docs(4),
+    ['<C-Space>'] = cmp.mapping.complete(),
+    ['<C-e>'] = cmp.mapping.abort(),
+    ['<Tab>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+  }),
+  sources = cmp.config.sources({
+    { name = 'nvim_lsp' },
+    { name = 'vsnip' }, -- For vsnip users.
+    -- { name = 'luasnip' }, -- For luasnip users.
+    -- { name = 'ultisnips' }, -- For ultisnips users.
+    -- { name = 'snippy' }, -- For snippy users.
+  }, {
+    { name = 'buffer' },
+  })
+})