Make SHA snarfing optional.

To disable: config plugins.Git.shaSnarfing False

README.md

@@ -141,6 +141,10 @@ to absolute paths.  The settings are found within `supybot.plugins.Git`:
   This will affect output from the periodic polling as well as the log
   command.  Default: 5
 
+* `shaSnarfing`: Enables or disables SHA sharfing, a feature which watches the
+  channel for mentions of a SHA and replies with the description of the
+  matching commit, if found.  Default: True
+
 How Notification Works
 ----------------------
 

config.py

@@ -49,4 +49,8 @@ def configure(advanced):
     registry.NonNegativeInteger(5, """How many commits are displayed at
         once from each repository."""))
 
+conf.registerGlobalValue(Git, 'shaSnarfing',
+    registry.Boolean(True, """Look for SHAs in user messages written to the
+       channel, and reply with the commit description if one is found."""))
+
 # vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:

plugin.py

@@ -472,15 +472,16 @@ def _schedule_next_event(self):
 
     def _snarf(self, irc, msg, match):
         r"""\b(?P<sha>[0-9a-f]{6,40})\b"""
-        sha = match.group('sha')
-        channel = msg.args[0]
-        repositories = filter(lambda r: channel in r.channels,
-                              self.repository_list)
-        for repository in repositories:
-            commit = repository.get_commit(sha)
-            if commit:
-                self._display_commits(irc, channel, repository, [commit])
-                break
+        if self.registryValue('shaSnarfing'):
+            sha = match.group('sha')
+            channel = msg.args[0]
+            repositories = filter(lambda r: channel in r.channels,
+                                  self.repository_list)
+            for repository in repositories:
+                commit = repository.get_commit(sha)
+                if commit:
+                    self._display_commits(irc, channel, repository, [commit])
+                    break
 
     def _stop_polling(self):
         # Never allow an exception to propagate since this is called in die()