feature: add a /debug command to change logging level dynamically

And changing the path too

doc/source/commands.rst

@@ -34,6 +34,12 @@ These commands work in *any* tab.
         available commands. If it has a valid command as an argument, this command
         will show the usage and the help for the given command.
 
+    /debug
+        **Usage:** ``/debug [filename]
+
+        Reset logging and enable debugging to ``[filename]``. If the filename
+        is empty, debug logging will be disabled.
+
     /join
         **Usage:** ``/join [room_name][@server][/nick] [password]``
 

poezio/config.py

@@ -679,7 +679,7 @@ def post_logging_setup():
 
 LOGGING_CONFIG = {
     'version': 1,
-    'disable_existing_loggers': True,
+    'disable_existing_loggers': False,
     'formatters': {
         'simple': {
             'format': '%(asctime)s %(levelname)s:%(module)s:%(message)s'

poezio/core/command_defs.py

@@ -442,4 +442,11 @@ def get_commands(commands: CommandCore, completions: CompletionCore, plugin_mana
             "shortdesc": "Reload the config. You can achieve the same by "
             "sending SIGUSR1 to poezio.",
         },
+        {
+            "name": "debug",
+            "func": commands.debug,
+            "usage": "[debug_filename]",
+            "shortdesc": "Enable or disable debug logging according to the "
+            "presence of [debug_filename].",
+        },
     ]

poezio/core/commands.py

@@ -14,9 +14,7 @@ from slixmpp.xmlstream.stanzabase import StanzaBase
 from slixmpp.xmlstream.handler import Callback
 from slixmpp.xmlstream.matcher import StanzaPath
 
-from poezio import common
-from poezio import tabs
-from poezio import multiuserchat as muc
+from poezio import common, config as config_module, tabs, multiuserchat as muc
 from poezio.bookmarks import Bookmark
 from poezio.config import config, DEFAULT_CONFIG
 from poezio.contact import Contact, Resource
@@ -1356,6 +1354,16 @@ class CommandCore:
         """
         self.core.reload_config()
 
+    @command_args_parser.raw
+    def debug(self, args):
+        """/debug [filename]"""
+        if not args.strip():
+            config_module.setup_logging('')
+            self.core.information('Debug logging disabled!', 'Info')
+        elif args:
+            config_module.setup_logging(args)
+            self.core.information(f'Debug logging to {args} enabled!', 'Info')
+
 
 def dumb_callback(*args, **kwargs):
     "mock callback"