nvim: use dracula if wal is unavailable

.config/nvim/lua/klowner/plugins/style-dracula.lua

@@ -0,0 +1,9 @@
+return {
+	"Mofiqul/dracula.nvim",
+	cond = function ()
+		return vim.fn.executable('wal') == 0 -- if wal is unavailable, I'll use Dracula
+	end,
+	config = function ()
+		vim.cmd('colorscheme dracula')
+	end,
+}

.config/nvim/lua/klowner/plugins/style-wal.lua

@@ -18,9 +18,11 @@ local function add_tweaks()
 	-- always set IblIndent to a slightly brighter version of the background color
 	vim.cmd('hi IblIndent guifg=' .. brightness(get_color('Normal', 'bg'), 20))
 end
-
 return {
 	'AlphaTechnolog/pywal.nvim',
+	cond = function ()
+		return vim.fn.executable('wal') == 1
+	end,
 	config = function ()
 		vim.cmd('colorscheme pywal')
 		add_tweaks()