Suggesting the new RLBotGUI launcher script.

Author: tarehart

rlbot_gui/gui.py

@@ -1,5 +1,6 @@
 import os
 import shutil
+import sys
 from pathlib import Path
 
 import eel
@@ -342,6 +343,7 @@ def get_language_support():
     return {
         'java': java_return_code == 0,
         'chrome': is_chrome_installed(),  # Scratch bots need chrome to auto-run
+        'fullpython': is_full_python(),
     }
 
 
@@ -535,6 +537,15 @@ def is_chrome_installed():
         return chm.find_path() is not None
 
 
+def is_full_python():
+    # As opposed to embedded python. A full python installation is better at package management,
+    # has access to tkinter, etc. This logic might be brittle; it's based on the historical fact that
+    # our embedded installer always put python within the RLBotGUI directory.
+    if 'RLBotGUI' in Path(sys.executable).parts:
+        return False
+    return True
+
+
 def launch_eel(use_chrome):
     port = 51993
     options = {'port': port}

rlbot_gui/gui/main.vue

@@ -349,6 +349,10 @@
 					</p>
 					<md-button @click="installRequirements(activeBot.path)"
 							   class="md-primary md-raised">Install Now</md-button>
+					<p v-if="!languageSupport.fullpython">
+						If the installation fails, try downloading our <a href="http://www.rlbot.org/install/RLBotGUI.exe">new launcher script</a>
+						which makes RLBotGUI better with package management.
+					</p>
 				</div>
 			</md-dialog-content>