[Port] add more logging to aid in debug

masque/ports.py

@@ -17,6 +17,7 @@ from .error import PortError, format_stacktrace
 
 
 logger = logging.getLogger(__name__)
+port_logger = logging.getLogger('masque.ports')
 
 
 @functools.total_ordering
@@ -207,6 +208,19 @@ class PortList(metaclass=ABCMeta):
     def ports(self, value: dict[str, Port]) -> None:
         pass
 
+    def _log_port_update(self, name: str) -> None:
+        """ Log the current state of the named port """
+        port_logger.info("Port %s: %s", name, self.ports[name])
+
+    def _log_port_removal(self, name: str) -> None:
+        """ Log that the named port has been removed """
+        port_logger.info("Port %s: removed", name)
+
+    def _log_bulk_update(self, label: str) -> None:
+        """ Log all current ports at DEBUG level """
+        for name, port in self.ports.items():
+            port_logger.debug("%s: Port %s: %s", label, name, port)
+
     @overload
     def __getitem__(self, key: str) -> Port:
         pass
@@ -260,6 +274,7 @@ class PortList(metaclass=ABCMeta):
             raise PortError(f'Port {name} already exists.')
         assert name not in self.ports
         self.ports[name] = value
+        self._log_port_update(name)
         return self
 
     def rename_ports(
@@ -286,11 +301,22 @@ class PortList(metaclass=ABCMeta):
             if duplicates:
                 raise PortError(f'Unrenamed ports would be overwritten: {duplicates}')
 
+        for kk, vv in mapping.items():
+            if vv is None:
+                self._log_port_removal(kk)
+            elif vv != kk:
+                self._log_port_removal(kk)
+
         renamed = {vv: self.ports.pop(kk) for kk, vv in mapping.items()}
         if None in renamed:
             del renamed[None]
 
         self.ports.update(renamed)      # type: ignore
+
+        for vv in mapping.values():
+            if vv is not None:
+                self._log_port_update(vv)
+
         return self
 
     def add_port_pair(
@@ -319,6 +345,8 @@ class PortList(metaclass=ABCMeta):
             }
         self.check_ports(names)
         self.ports.update(new_ports)
+        self._log_port_update(names[0])
+        self._log_port_update(names[1])
         return self
 
     def plugged(
@@ -388,6 +416,7 @@ class PortList(metaclass=ABCMeta):
 
         for pp in chain(a_names, b_names):
             del self.ports[pp]
+            self._log_port_removal(pp)
         return self
 
     def check_ports(