Call pip with the subprocess module.

Author: kipje13

run.py

@@ -1,16 +1,6 @@
+import subprocess
 import sys
 
-# https://stackoverflow.com/a/51704613
-try:
-    from pip import main as pipmain
-except ImportError:
-    from pip._internal import main as pipmain
-
-# More pip changes breaking us.
-main_fn = pipmain
-if hasattr(pipmain, 'main'):
-    main_fn = pipmain.main
-
 DEFAULT_LOGGER = 'rlbot'
 
 if __name__ == '__main__':
@@ -23,15 +13,15 @@
             logger.log(logging_utils.logging_level,
                        'Skipping upgrade check for now since it looks like you have no internet')
         elif public_utils.is_safe_to_upgrade():
-            main_fn(['install', '-r', 'requirements.txt', '--upgrade', '--upgrade-strategy=eager'])
+            subprocess.call([sys.executable, "-m", "pip", "install", '-r', 'requirements.txt', '--upgrade', '--upgrade-strategy=eager'])
 
             # https://stackoverflow.com/a/44401013
             rlbots = [module for module in sys.modules if module.startswith('rlbot')]
             for rlbot_module in rlbots:
                 sys.modules.pop(rlbot_module)
 
     except ImportError:
-        main_fn(['install', '-r', 'requirements.txt', '--upgrade', '--upgrade-strategy=eager'])
+        subprocess.call([sys.executable, "-m", "pip", "install", '-r', 'requirements.txt', '--upgrade', '--upgrade-strategy=eager'])
 
     try:
         if len(sys.argv) > 1 and sys.argv[1] == 'gui':