[V3 Launcher] Show version in main menu (#1810)

* [V3 Launcher] Show version in main menu

* Fix syntax

* Fix typo

* Make text underlined

* Show if red is outdated

redbot/launcher.py

@@ -5,9 +5,11 @@ import subprocess
 import sys
 import argparse
 import asyncio
+import aiohttp
 
 import pkg_resources
 from pathlib import Path
+from distutils.version import StrictVersion
 from redbot.setup import (
     basic_setup,
     load_existing_config,
@@ -16,6 +18,7 @@ from redbot.setup import (
     create_backup,
     save_config,
 )
+from redbot.core import __version__
 from redbot.core.utils import safe_delete
 from redbot.core.cli import confirm
 
@@ -384,12 +387,27 @@ def debug_info():
     sys.exit(0)
 
 
+async def is_outdated():
+    red_pypi = "https://pypi.python.org/pypi/Red-DiscordBot"
+    async with aiohttp.ClientSession() as session:
+        async with session.get("{}/json".format(red_pypi)) as r:
+            data = await r.json()
+            new_version = data["info"]["version"]
+    return StrictVersion(new_version) > StrictVersion(__version__), new_version
+
+
 def main_menu():
     if IS_WINDOWS:
         os.system("TITLE Red - Discord Bot V3 Launcher")
     clear_screen()
+    loop = asyncio.get_event_loop()
+    outdated, new_version = loop.run_until_complete(is_outdated())
     while True:
         print(INTRO)
+        print("\033[4mCurrent version:\033[0m {}".format(__version__))
+        if outdated:
+            print("Red is outdated. {} is available.".format(new_version))
+        print("")
         print("1. Run Red w/ autorestart in case of issues")
         print("2. Run Red")
         print("3. Update Red")
@@ -418,13 +436,12 @@ def main_menu():
             basic_setup()
             wait()
         elif choice == "5":
-            asyncio.get_event_loop().run_until_complete(remove_instance_interaction())
+            loop.run_until_complete(remove_instance_interaction())
             wait()
         elif choice == "6":
             debug_info()
         elif choice == "7":
             while True:
-                loop = asyncio.get_event_loop()
                 clear_screen()
                 print("==== Reinstall Red ====")
                 print(