feat(tweaks): grip markdown viewer

lua/dot013/tweaks.lua

@@ -8,6 +8,47 @@ vim.api.nvim_create_autocmd("TextYankPost", {
 	pattern = "*",
 })
 
+local grip_channel = nil
+vim.api.nvim_create_user_command("GripStart", function()
+	if grip_channel then
+		return
+	end
+
+	local file = vim.api.nvim_buf_get_name(0)
+
+	local cmd = "grip " .. file
+
+	grip_channel = vim.fn.jobstart(cmd, {
+		stderr_buffered = true,
+		on_stderr = function(_, err)
+			vim.fn.jobstop(grip_channel)
+
+			local content = table.concat(err, "\n")
+			if content:len() > 0 then
+				vim.api.nvim_notify("Grip error: " .. content, vim.log.levels.ERROR, {})
+			end
+		end,
+		on_exit = function()
+			vim.fn.chanclose(grip_channel)
+			grip_channel = nil
+		end,
+	})
+end, {})
+
+vim.api.nvim_create_user_command("GripStop", function()
+	if grip_channel then
+		vim.fn.jobstop(grip_channel)
+	end
+end, {})
+
+vim.api.nvim_create_autocmd("Quit", {
+	callback = function()
+		if grip_channel then
+			vim.fn.jobstop(grip_channel)
+		end
+	end,
+})
+
 -- Move when highlighted
 vim.keymap.set("n", "J", "mzJ`z")