chore(nvim): Migrated cmp and lsp config to lazy

.config/nvim/lua/null/plugins/completion.lua

@@ -1,12 +1,130 @@
 return {
+	{
+		"neovim/nvim-lspconfig",
+		lazy = true,
+		config = function ()
+			local lsp = require("lspconfig")
+			lsp.pyright.setup{}
+			-- lsp.jedi_language_server.setup{}
+			lsp.rust_analyzer.setup({
+				settings = {
+					["rust-analyzer"] = {
+						assist = {
+							importGranularity = "module",
+							importPrefix = "by_self",
+						},
+						cargo = {
+							loadOutDirsFromCheck = true
+						},
+						procMacro = {
+							enable = true
+						},
+					}
+				}
+			})
+		end,
+	},
 	{
 		"hrsh7th/nvim-cmp",
 		dependencies = {
-			"neovim/nvim-lspconfig",
 			"hrsh7th/cmp-nvim-lsp",
 			"hrsh7th/cmp-buffer",
 			"hrsh7th/cmp-path",
 			"hrsh7th/cmp-cmdline",
 		},
+		config = function ()
+			-- From vimrc, may need clean up
+			local cmp = require("cmp")
+
+			local has_words_before = function()
+				local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+				return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
+			end
+
+			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.
+					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(),
+					["<CR>"] = cmp.mapping(function(fallback)
+						if cmp.visible() and not cmp.confirm() then
+							cmp.abort()
+						else
+							fallback()
+						end
+					end, {"i", "s"}),
+					["<Tab>"] = cmp.mapping(function(fallback)
+						if cmp.visible() then
+							cmp.select_next_item()
+							-- elseif has_words_before() then
+							--   cmp.complete()
+						else
+							fallback() -- The fallback function sends a already mapped key. In this case, it"s probably `<Tab>`.
+						end
+					end, { "i", "s" }),
+					["<S-Tab>"] = cmp.mapping(function()
+						if cmp.visible() then
+							cmp.select_prev_item()
+						end
+					end, { "i", "s" }),
+				}),
+				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" },
+				})
+			})
+
+			-- Set configuration for specific filetype.
+			cmp.setup.filetype("gitcommit", {
+				sources = cmp.config.sources({
+					{ name = "cmp_git" }, -- You can specify the `cmp_git` source if you were installed it.
+					}, {
+					{ name = "buffer" },
+				})
+			})
+
+			-- Use buffer source for `/` (if you enabled `native_menu`, this won"t work anymore).
+			cmp.setup.cmdline("/", {
+				mapping = cmp.mapping.preset.cmdline(),
+				sources = {
+					{ name = "buffer" }
+				}
+			})
+
+			-- Use cmdline & path source for ":" (if you enabled `native_menu`, this won"t work anymore).
+			cmp.setup.cmdline(":", {
+				mapping = cmp.mapping.preset.cmdline(),
+				sources = cmp.config.sources({
+					{ name = "path" }
+				}, {
+					{ name = "cmdline" }
+				})
+			})
+
+			-- Setup lspconfig.
+			local capabilities = require("cmp_nvim_lsp").default_capabilities()
+			require("lspconfig")["pyright"].setup {
+				capabilities = capabilities
+			}
+		end,
 	},
 }