config: nvim: rewrite config in lua and use packer as plugin manager

config/nvim/lua/plugins.lua

@@ -0,0 +1,61 @@
+--------------------
+-- Packer Bootstrap
+--------------------
+local packer_installed, _ = pcall(require, 'packer')
+local packer_bootstrap = false
+if (not packer_installed) then
+	-- ask user whether packer should be bootstrapped
+	packer_bootstrap = require('utils').prompt(
+		'Plugin manager packer not found. Install it now?',
+		'Bootstrapping packer now...',
+		'Skipping setup of packer and plugins.')
+
+	if (not packer_bootstrap) then
+		return
+	end
+
+	-- perform actual bootstrap
+	local fn = vim.fn
+	local install_path = fn.stdpath('data') .. '/site/pack/packer/start/packer.nvim'
+	fn.system({'git', 'clone', '--depth', '1', 'https://github.com/wbthomason/packer.nvim', install_path})
+	vim.cmd('packadd packer.nvim')
+end
+
+-- helper function to be used `config` parameter of packer's use to externalize
+-- plugin configuration, expects the name of the config file
+function load_config(name)
+  return string.format('require("plugins/%s")', name)
+end
+
+return require('packer').startup({
+	function(use)
+		use 'wbthomason/packer.nvim'
+
+		--------------------
+		-- Visuals
+		--------------------
+		use { -- colorblind-friendly colorscheme
+			'romainl/vim-dichromatic',
+			config = function() vim.cmd('colorscheme dichromatic') end,
+		}
+		use { -- color highlighter
+			'norcalli/nvim-colorizer.lua',
+			config = function() require('colorizer').setup() end,
+		}
+
+		-- Automatically set up your configuration after cloning packer.nvim
+		-- Put this at the end after all plugins
+		if packer_bootstrap then
+			require('packer').sync()
+		end
+	end,
+	config = {
+		display = {
+			open_fn = require("packer.util").float,
+		},
+		profile = {
+			enable = true,
+			threshold = 1, -- the amount in ms that a plugins load time must be over for it to be included in the profile
+		},
+	},
+})