Add a way to more explicitly denote when a CAP handshake has ended early

modules/line_handler.py

@@ -265,6 +265,7 @@ class Module(ModuleManager.BaseModule):
         is_multiline = len(event["args"]) > 2 and event["args"][2] == "*"
 
         if subcommand == "ls":
+            event["server"].cap_started = True
             event["server"].server_capabilities.update(capabilities)
             if not is_multiline:
                 matched_capabilities = set(event["server"
@@ -292,12 +293,13 @@ class Module(ModuleManager.BaseModule):
         elif subcommand == "ack":
             event["server"].capabilities.update(capabilities)
             if not is_multiline:
-                results = self.events.on("received.cap.ack").call(
+                self.events.on("received.cap.ack").call(
                    capabilities=event["server"].capabilities,
                    server=event["server"])
 
-                if not False in results:
-                    if not event["server"].waiting_for_capabilities():
+                if event["server"].cap_started and not event["server"
+                        ].waiting_for_capabilities():
+                    event["server"].cap_started = False
                     event["server"].send_capability_end()
         elif subcommand == "nack":
             event["server"].send_capability_end()

modules/resume.py

@@ -17,7 +17,7 @@ class Module(ModuleManager.BaseModule):
         username, token = self._get_token(event["server"])
         if CAP in event["capabilities"] and username and token:
             event["server"].send("RESUME %s %s" % (username, token))
-            return False
+            event["server"].cap_started = False
 
     @utils.hook("received.resume")
     def on_resume(self, event):

src/IRCServer.py

@@ -26,6 +26,7 @@ class Server(IRCObject.Object):
         self.capabilities = set([]) # type: typing.Set[str]
         self.server_capabilities = {} # type: typing.Dict[str, str]
         self.batches = {} # type: typing.Dict[str, utils.irc.IRCLine]
+        self.cap_started = False
 
         self.write_buffer = b""
         self.buffered_lines = [] # type: typing.List[bytes]
@@ -361,7 +362,7 @@ class Server(IRCObject.Object):
         self._capabilities_waiting.add(capability)
     def capability_done(self, capability: str):
         self._capabilities_waiting.remove(capability)
-        if not self._capabilities_waiting:
+        if self.cap_started and not self._capabilities_waiting:
             self.send_capability_end()
 
     def send_pass(self, password: str):