Add configuration variable conf.supybot.capabilities.private.

This variable is a list of capabilities that are considered as 'private',
ie. the bot won't tell anyone but admins that a user has it, nor will the
bot give a list of users with this capability.

plugins/User/plugin.py

@@ -54,6 +54,15 @@ class User(callbacks.Plugin):
         predicates = []
         for (option, arg) in optlist:
             if option == 'capability':
+                try:
+                    u = ircdb.users.getUser(msg.prefix)
+                    if arg in conf.supybot.capabilities.private() and \
+                            not u._checkCapability('admin'):
+                        raise KeyError
+                except KeyError:
+                    # Note that it may be raised by checkCapability too.
+                    irc.error(_('This is a private capability. Only admins '
+                        'can see who has it.'), Raise=True)
                 def p(u, cap=arg):
                     try:
                         return u._checkCapability(cap)

plugins/User/test.py

@@ -33,7 +33,7 @@ import supybot.world as world
 import supybot.ircdb as ircdb
 
 class UserTestCase(PluginTestCase):
-    plugins = ('User', 'Admin')
+    plugins = ('User', 'Admin', 'Config')
     prefix1 = 'somethingElse!user@host.tld'
     prefix2 = 'EvensomethingElse!user@host.tld'
     def testHostmaskList(self):
@@ -95,6 +95,14 @@ class UserTestCase(PluginTestCase):
         self.assertRegexp('user list --capability testcap', 'no matching')
         self.assertNotError('admin capability add biff testcap')
         self.assertResponse('user list --capability testcap', 'biff')
+        self.assertNotError('config capabilities.private testcap')
+        self.assertRegexp('user list --capability testcap', 'Error:.*private')
+        self.assertNotError('admin capability add biff admin')
+        self.assertResponse('user list --capability testcap', 'biff')
+        self.assertNotError('admin capability remove biff admin')
+        self.assertRegexp('user list --capability testcap', 'Error:.*private')
+        self.assertNotError('config capabilities.private ""')
+        self.assertResponse('user list --capability testcap', 'biff')
         self.assertNotError('admin capability remove biff testcap')
         self.assertRegexp('user list --capability testcap', 'no matching')
 

src/callbacks.py

@@ -484,8 +484,12 @@ class RichReplyMethods(object):
             log.warning('Denying %s for lacking %q capability.',
                         self.msg.prefix, capability)
             if not self._getConfig(conf.supybot.reply.error.noCapability):
-                v = self._getConfig(conf.supybot.replies.noCapability)
+                if capability in conf.supybot.capabilities.private():
-                s = self.__makeReply(v % capability, s)
+                    v = self._getConfig(conf.supybot.replies.genericNoCapability)
+                else:
+                    v = self._getConfig(conf.supybot.replies.noCapability)
+                    v %= capability
+                s = self.__makeReply(v, s)
                 return self._error(s, **kwargs)
             else:
                 log.debug('Not sending capability error, '

src/ircdb.py

@@ -1082,6 +1082,9 @@ conf.registerGlobalValue(conf.supybot.capabilities, 'default',
     registry.Boolean(True, """Determines whether the bot by default will allow
     users to have a capability.  If this is disabled, a user must explicitly
     have the capability for whatever command he wishes to run."""))
+conf.registerGlobalValue(conf.supybot.capabilities, 'private',
+    registry.SpaceSeparatedListOfStrings([], """Determines what capabilities
+    the bot will never tell to a non-admin whether or not a user has them."""))
 
 
 # vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:

test/test_callbacks.py

@@ -531,13 +531,16 @@ class PluginRegexpTestCase(PluginTestCase):
         self.assertResponse('test', 'test <foo>')
 
 class RichReplyMethodsTestCase(PluginTestCase):
-    plugins = ()
+    plugins = ('Config',)
     class NoCapability(callbacks.Plugin):
         def error(self, irc, msg, args):
             irc.errorNoCapability('admin')
     def testErrorNoCapability(self):
         self.irc.addCallback(self.NoCapability(self.irc))
-        self.assertRegexp('error', 'admin')
+        self.assertRegexp('error', 'You don\'t have the admin capability')
+        self.assertNotError('config capabilities.private admin')
+        self.assertRegexp('error', 'Error: You\'re missing some capability')
+        self.assertNotError('config capabilities.private ""')
 
 
 class SourceNestedPluginTestCase(PluginTestCase):