Add nvim automatic theme switching

For colorschemes that have different schemes for light vs dark modes

vim/plugin/colors.lua

@@ -0,0 +1,67 @@
+local wezvar = require "wezvar"
+
+local termcolors = {}
+
+local dark = {
+	dayfox = "nightfox";
+	antiphoton = "photon";
+	fogbell_light = "fogbell";
+}
+local light = {}
+for _light, _dark in pairs(dark) do
+	light[_dark] = _light
+end
+
+function termcolors.propagate()
+	local num_color = vim.fn.synIDattr(vim.fn.hlID("normal"), "bg")
+	if vim.env.TERM_PROGRAM == "WezTerm" then
+		wezvar("bgcolor", num_color)
+	end
+end
+
+function termcolors.reset()
+	if vim.env.TERM_PROGRAM == "WezTerm" then
+		wezvar("bgcolor", "")
+	end
+end
+
+vim.api.nvim_create_autocmd("ColorScheme", {
+	desc = "Sets wezterm's background colour to match vim";
+	callback = termcolors.propagate;
+})
+
+vim.api.nvim_create_autocmd("ExitPre", {
+	desc = "Resets terminal colours back to normal";
+	callback = termcolors.reset;
+})
+
+vim.api.nvim_create_user_command("Dark", function()
+	if vim.o.bg ~= "dark" then
+		local current_colors_name = vim.g.colors_name
+		vim.g.ayucolor = "dark"
+		vim.g.arcadia_Daybreak = nil
+		vim.g.arcadia_Midnight = 1
+		vim.g.alduin_Shout_Become_Ethereal = 1
+		vim.o.bg = "dark"
+		vim.cmd("colorscheme " .. (dark[current_colors_name] or current_colors_name))
+	end
+end, {})
+
+vim.api.nvim_create_user_command("Light", function()
+	if vim.o.bg ~= "light" then
+		local current_colors_name = vim.g.colors_name
+		vim.g.ayucolor = "light"
+		vim.g.arcadia_Daybreak = 1
+		vim.g.arcadia_Midnight = nil
+		vim.g.alduin_Shout_Become_Ethereal = nil
+		vim.o.bg = "light"
+		vim.cmd("colorscheme " .. (light[current_colors_name] or current_colors_name))
+	end
+end, {})
+
+vim.cmd("colorscheme nord")
+if vim.fn.filereadable(os.getenv("HOME") .. "/.dark")==1 then
+	vim.cmd("Dark")
+else
+	vim.cmd("Light")
+end