feat: add sudo-demo plugin

sudo-demo.yazi/init.lua

@@ -0,0 +1,44 @@
+--- Verify if `sudo` is already authenticated
+--- @return boolean
+local function sudo_already()
+	local status = Command("sudo"):args({ "--validate", "--non-interactive" }):status()
+	assert(status, "Failed to run `sudo --validate --non-interactive`")
+	return status.success
+end
+
+--- Run a program with `sudo` privilege
+--- @param program string
+--- @param args table
+--- @return Output|nil output
+--- @return integer|nil err
+---  0: success
+---  1: sudo failed
+local function run_with_sudo(program, args)
+	local cmd = Command("sudo"):args({ program, table.unpack(args) }):stdout(Command.PIPED):stderr(Command.PIPED)
+	if sudo_already() then
+		return cmd:output()
+	end
+
+	local permit = ya.hide()
+	print(string.format("Sudo password required to run: `%s %s`", program, table.concat(args)))
+	local output = cmd:output()
+	permit:drop()
+
+	if output.status.success or sudo_already() then
+		return output
+	end
+	return nil, 1
+end
+
+return {
+	entry = function()
+		local output = run_with_sudo("ls", { "-l" })
+		if not output then
+			return ya.err("Failed to run `sudo ls -l`")
+		end
+
+		ya.err("stdout", output.stdout)
+		ya.err("stderr", output.stderr)
+		ya.err("status.code", output.status.code)
+	end,
+}