feat(commands): grip command for markdown preview

lua/dot/commands.lua

@@ -0,0 +1,50 @@
+-- Grip markdown reader
+
+---@type integer?
+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 = "go-grip -b false -H 0.0.0.0 " .. file
+
+	grip_channel = vim.fn.jobstart(cmd, {
+		on_stderr = function(_, err)
+			if grip_channel == nil then
+				return
+			end
+
+			vim.fn.jobstop(grip_channel)
+
+			local content = table.concat(err, "\n")
+			if #content > 0 then
+				vim.notify("Grip error: " .. content, vim.log.levels.ERROR, {})
+			end
+		end,
+		on_exit = function()
+			if grip_channel == nil then
+				return
+			end
+
+			vim.fn.chanclose(grip_channel)
+			grip_channel = nil
+		end,
+		stderr_buffered = true,
+	})
+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({ "QuitPre", "BufDelete" }, {
+	callback = function()
+		if grip_channel then
+			vim.fn.jobstop(grip_channel)
+		end
+	end,
+})

lua/dot/init.lua

@@ -87,6 +87,7 @@ vim.diagnostic.config({
 	},
 })
 
+require("dot.commands")
 require("dot.keymaps")
 
 require("nvim-treesitter.configs").setup({