1
# Copyright (C) 2007 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
"""Support for plugin hooking logic."""
19
from bzrlib.lazy_import import lazy_import
20
lazy_import(globals(), """
28
"""A dictionary mapping hook name to a list of callables.
30
e.g. ['FOO'] Is the list of items to be called when the
31
FOO hook is triggered.
36
self._callable_names = {}
38
def get_hook_name(self, a_callable):
39
"""Get the name for a_callable for UI display.
41
If no name has been registered, the string 'No hook name' is returned.
43
return self._callable_names.get(a_callable, "No hook name")
45
def install_hook(self, hook_name, a_callable):
46
"""Install a_callable in to the hook hook_name.
48
:param hook_name: A hook name. See the __init__ method of BranchHooks
49
for the complete list of hooks.
50
:param a_callable: The callable to be invoked when the hook triggers.
51
The exact signature will depend on the hook - see the __init__
52
method of BranchHooks for details on each hook.
55
self[hook_name].append(a_callable)
57
raise errors.UnknownHook(self.__class__.__name__, hook_name)
59
def name_hook(self, a_callable, name):
60
"""Associate name with a_callable to show users what is running."""
61
self._callable_names[a_callable] = name