[V3 Sentry] Only log errors that come from core code (#1353)

* Do not load core cogs as extensions

* Filter this shit

redbot/core/cog_manager.py

@@ -208,8 +208,12 @@ class CogManager:
         RuntimeError
             When no matching spec can be found.
         """
-        resolved_paths = [str(p.resolve()) for p in await self.paths()]
+        resolved_paths = set(await self.paths())
-        for finder, module_name, _ in pkgutil.iter_modules(resolved_paths):
+        core_paths = set(await self.core_paths())
+
+        real_paths = [str(p) for p in (resolved_paths - core_paths)]
+
+        for finder, module_name, _ in pkgutil.iter_modules(real_paths):
             if name == module_name:
                 spec = finder.find_spec(name)
                 if spec:

redbot/core/events.py

@@ -30,6 +30,21 @@ ______         _           ______ _                       _  ______       _
 """
 
 
+def should_log_sentry(exception) -> bool:
+    e = exception
+    while e.__cause__ is not None:
+        e = e.__cause__
+
+    tb = e.__traceback__
+    tb_frame = None
+    while tb is not None:
+        tb_frame = tb.tb_frame
+        tb = tb.tb_next
+
+    module = tb_frame.f_globals.get('__name__')
+    return module.startswith('redbot')
+
+
 def init_events(bot, cli_flags):
 
     @bot.event
@@ -160,6 +175,7 @@ def init_events(bot, cli_flags):
             log.exception("Exception in command '{}'"
                           "".format(ctx.command.qualified_name),
                           exc_info=error.original)
+            if should_log_sentry(error):
                 sentry_log.exception("Exception in command '{}'"
                                      "".format(ctx.command.qualified_name),
                                      exc_info=error.original)
@@ -191,6 +207,7 @@ def init_events(bot, cli_flags):
             except AttributeError:
                 sentry_error = error
 
+            if should_log_sentry(sentry_error):
                 sentry_log.exception("Unhandled command error.",
                                      exc_info=sentry_error)