Support having no sys.argv in debugger. Fixes #473

src/debugpy/_vendored/pydevd/_pydevd_bundle/pydevd_process_net_command_json.py

@@ -400,8 +400,9 @@ class PyDevJsonCommandProcessor(object):
             self.api.stop_on_entry()
 
     def _send_process_event(self, py_db, start_method):
-        if len(sys.argv) > 0:
-            name = sys.argv[0]
+        argv = getattr(sys, 'argv', [])
+        if len(argv) > 0:
+            name = argv[0]
         else:
             name = ''
 

src/debugpy/_vendored/pydevd/pydev_ipython/inputhook.py

@@ -38,10 +38,12 @@ GUI_NONE = 'none'  # i.e. disable
 # Utilities
 #-----------------------------------------------------------------------------
 
+
 def ignore_CTRL_C():
     """Ignore CTRL+C (not implemented)."""
     pass
 
+
 def allow_CTRL_C():
     """Take CTRL+C into account (not implemented)."""
     pass
@@ -297,7 +299,6 @@ class InputHookManager(object):
         """
         self.clear_inputhook()
 
-
     def enable_glut(self, app=None):
         """ Enable event loop integration with GLUT.
 
@@ -329,13 +330,14 @@ class InputHookManager(object):
                                               glut_idle, inputhook_glut
 
         if GUI_GLUT not in self._apps:
-            glut.glutInit(sys.argv)
+            argv = getattr(sys, 'argv', [])
+            glut.glutInit(argv)
             glut.glutInitDisplayMode(glut_display_mode)
             # This is specific to freeglut
             if bool(glut.glutSetOption):
                 glut.glutSetOption(glut.GLUT_ACTION_ON_WINDOW_CLOSE,
                                     glut.GLUT_ACTION_GLUTMAINLOOP_RETURNS)
-            glut.glutCreateWindow(sys.argv[0])
+            glut.glutCreateWindow(argv[0] if len(argv) > 0 else '')
             glut.glutReshapeWindow(1, 1)
             glut.glutHideWindow()
             glut.glutWMCloseFunc(glut_close)
@@ -349,7 +351,6 @@ class InputHookManager(object):
         self._current_gui = GUI_GLUT
         self._apps[GUI_GLUT] = True
 
-
     def disable_glut(self):
         """Disable event loop integration with glut.
 
@@ -430,6 +431,7 @@ class InputHookManager(object):
         possible to choose backend before importing pyplot for the first
         time only.
         """
+
         def inputhook_mac(app=None):
             if self.pyplot_imported:
                 pyplot = sys.modules['matplotlib.pyplot']
@@ -451,6 +453,7 @@ class InputHookManager(object):
         """Return a string indicating the currently active GUI or None."""
         return self._current_gui
 
+
 inputhook_manager = InputHookManager()
 
 enable_wx = inputhook_manager.enable_wx
@@ -484,6 +487,7 @@ set_return_control_callback = inputhook_manager.set_return_control_callback
 get_return_control_callback = inputhook_manager.get_return_control_callback
 get_inputhook = inputhook_manager.get_inputhook
 
+
 # Convenience function to switch amongst them
 def enable_gui(gui=None, app=None):
     """Switch amongst GUI input hooks by name.
@@ -535,6 +539,7 @@ def enable_gui(gui=None, app=None):
             raise ValueError(e)
     return gui_hook(app)
 
+
 __all__ = [
     "GUI_WX",
     "GUI_QT",
@@ -548,7 +553,6 @@ __all__ = [
     "GUI_GTK3",
     "GUI_NONE",
 
-
     "ignore_CTRL_C",
     "allow_CTRL_C",
 

src/debugpy/_vendored/pydevd/tests_python/resources/_debugger_case_remote.py

@@ -3,13 +3,14 @@ if __name__ == '__main__':
     import sys
     port = int(sys.argv[1])
     root_dirname = os.path.dirname(os.path.dirname(__file__))
-    
+
     if root_dirname not in sys.path:
         sys.path.append(root_dirname)
-        
+
+    del sys.argv
+
     import pydevd
     print('before pydevd.settrace')
     pydevd.settrace(port=port)
     print('after pydevd.settrace')
     print('TEST SUCEEDED!')
-