Revert "[neovim] Remove unused lua plugins"

This reverts commit bc0ff82244.

.config/nvim/lua/user/cmp.lua

@@ -3,6 +3,13 @@ if not cmp_status_ok then
 	return
 end
 
+local snip_status_ok, luasnip = pcall(require, "luasnip")
+if not snip_status_ok then
+	return
+end
+
+require("luasnip/loaders/from_vscode").lazy_load()
+
 local check_backspace = function()
 	local col = vim.fn.col(".") - 1
 	return col == 0 or vim.fn.getline("."):sub(col, col):match("%s")
@@ -37,6 +44,12 @@ local kind_icons = {
 }
 
 cmp.setup({
+	snippet = {
+		expand = function(args)
+			luasnip.lsp_expand(args.body) -- For `luasnip` users.
+		end,
+	},
+
 	mapping = cmp.mapping.preset.insert({
 		["<C-k>"] = cmp.mapping.select_prev_item(),
 		["<C-j>"] = cmp.mapping.select_next_item(),
@@ -53,6 +66,10 @@ cmp.setup({
 		["<Tab>"] = cmp.mapping(function(fallback)
 			if cmp.visible() then
 				cmp.select_next_item()
+			elseif luasnip.expandable() then
+				luasnip.expand()
+			elseif luasnip.expand_or_jumpable() then
+				luasnip.expand_or_jump()
 			elseif check_backspace() then
 				fallback()
 			else
@@ -65,6 +82,8 @@ cmp.setup({
 		["<S-Tab>"] = cmp.mapping(function(fallback)
 			if cmp.visible() then
 				cmp.select_prev_item()
+			elseif luasnip.jumpable(-1) then
+				luasnip.jump(-1)
 			else
 				fallback()
 			end
@@ -79,6 +98,8 @@ cmp.setup({
 			vim_item.kind = kind_icons[vim_item.kind]
 			vim_item.menu = ({
 				nvim_lsp = "",
+				nvim_lua = "",
+				luasnip = "",
 				buffer = "",
 				path = "",
 				emoji = "",
@@ -88,6 +109,8 @@ cmp.setup({
 	},
 	sources = {
 		{ name = "nvim_lsp" },
+		{ name = "nvim_lua" },
+		{ name = "luasnip" },
 		{ name = "buffer" },
 		{ name = "path" },
 	},

.config/nvim/lua/user/plugins.lua

@@ -71,7 +71,9 @@ return packer.startup(function(use)
 	use({ "hrsh7th/nvim-cmp", commit = "0e436ee23abc6c3fe5f3600145d2a413703e7272" })
 	use({ "hrsh7th/cmp-buffer", commit = "3022dbc9166796b644a841a02de8dd1cc1d311fa" })
 	use({ "hrsh7th/cmp-path", commit = "91ff86cd9c29299a64f968ebb45846c485725f23" })
+	use({ "saadparwaiz1/cmp_luasnip", commit = "a9de941bcbda508d0a45d28ae366bb3f08db2e36" })
 	use({ "hrsh7th/cmp-nvim-lsp", commit = "affe808a5c56b71630f17aa7c38e15c59fd648a8" })
+	use({ "hrsh7th/cmp-nvim-lua", commit = "d276254e7198ab7d00f117e88e223b4bd8c02d21" })
 
 	-- snippets
 	use({ "L3MON4D3/LuaSnip", tag = "v1.*" })