Simulator Fixes

A bunch of simulator fixes:

• 92c835bb ("sim: Properly exit when window is closed")
• fa80679d ("sim: Fix wrong petal order")
  Fixes #68 (closed).
• 3874edb3 ("docs: Document requests dependency for simulator")
• 8a5bed0b ("sim: Mock urequests using requests")
  (If requests is not present, code without network usage still works)
• abf74077 ("sim: run: Return proper stat_result")
• 1926b535 ("sim: gc: More stubs")
• 748224fa ("Add /venv/ to gitignore")
• d6f36cfa ("sim: Fix sys_kernel re-importing host time module")

sim/run.py

@@ -6,6 +6,7 @@ import importlib.util
 import os
 import sys
 import builtins
+import argparse
 
 
 projectpath = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
@@ -112,13 +113,24 @@ def _stat(path):
 
 os.stat = _stat
 
-if len(sys.argv) >= 2 and sys.argv[1] == "screenshot":
+
+def sim_main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--screenshot", action="store_true", default=False)
+    parser.add_argument("override_app", nargs="?")
+    args = parser.parse_args()
+
     import _sim
 
-    _sim.SCREENSHOT = True
-elif len(sys.argv) == 2:
-    import st3m.run
+    _sim.SCREENSHOT = args.screenshot
+
+    if args.override_app is not None:
+        import st3m.run
+
+        st3m.run.override_main_app = args.override_app
+
+    import main
 
-    st3m.run.override_main_app = sys.argv[1]
 
-import main
+if __name__ == "__main__":
+    sim_main()