115
115
FOO hook is triggered.
118
def __init__(self, module=None, member_name=None):
119
"""Create a new hooks dictionary.
121
:param module: The module from which this hooks dictionary should be loaded
122
(used for lazy hooks)
123
:param member_name: Name under which this hooks dictionary should be loaded.
124
(used for lazy hooks)
126
119
dict.__init__(self)
127
120
self._callable_names = {}
128
self._module = module
129
self._member_name = member_name
131
def add_hook(self, name, doc, introduced, deprecated=None):
132
"""Add a hook point to this dictionary.
134
:param name: The name of the hook, for clients to use when registering.
135
:param doc: The docs for the hook.
136
:param introduced: When the hook was introduced (e.g. (0, 15)).
137
:param deprecated: When the hook was deprecated, None for
141
raise errors.DuplicateKey(name)
143
callbacks = _lazy_hooks.setdefault(
144
(self._module, self._member_name, name), [])
147
hookpoint = HookPoint(name=name, doc=doc, introduced=introduced,
148
deprecated=deprecated, callbacks=callbacks)
149
self[name] = hookpoint
151
@symbol_versioning.deprecated_method(symbol_versioning.deprecated_in((2, 4)))
152
122
def create_hook(self, hook):
153
123
"""Create a hook which can have callbacks registered for it.
197
167
return self._callable_names.get(a_callable, "No hook name")
199
def install_named_hook_lazy(self, hook_name, callable_module,
200
callable_member, name):
201
"""Install a_callable in to the hook hook_name lazily, and label it.
203
:param hook_name: A hook name. See the __init__ method for the complete
205
:param callable_module: Name of the module in which the callable is
207
:param callable_member: Member name of the callable.
208
:param name: A name to associate the callable with, to show users what
212
hook = self[hook_name]
214
raise errors.UnknownHook(self.__class__.__name__, hook_name)
216
hook_lazy = getattr(hook, "hook_lazy")
217
except AttributeError:
218
raise errors.UnsupportedOperation(self.install_named_hook_lazy,
221
hook_lazy(callable_module, callable_member, name)
223
169
def install_named_hook(self, hook_name, a_callable, name):
224
170
"""Install a_callable in to the hook hook_name, and label it name.
226
:param hook_name: A hook name. See the __init__ method for the complete
172
:param hook_name: A hook name. See the __init__ method of BranchHooks
173
for the complete list of hooks.
228
174
:param a_callable: The callable to be invoked when the hook triggers.
229
175
The exact signature will depend on the hook - see the __init__
230
method for details on each hook.
176
method of BranchHooks for details on each hook.
231
177
:param name: A name to associate a_callable with, to show users what is
243
189
if name is not None:
244
190
self.name_hook(a_callable, name)
246
def uninstall_named_hook(self, hook_name, label):
247
"""Uninstall named hooks.
249
:param hook_name: Hook point name
250
:param label: Label of the callable to uninstall
253
hook = self[hook_name]
255
raise errors.UnknownHook(self.__class__.__name__, hook_name)
257
uninstall = getattr(hook, "uninstall")
258
except AttributeError:
259
raise errors.UnsupportedOperation(self.install_named_hook_lazy,
264
192
def name_hook(self, a_callable, name):
265
193
"""Associate name with a_callable to show users what is running."""
266
194
self._callable_names[a_callable] = name
279
207
should describe the recommended replacement hook to register for.
282
def __init__(self, name, doc, introduced, deprecated=None, callbacks=None):
210
def __init__(self, name, doc, introduced, deprecated):
283
211
"""Create a HookPoint.
285
213
:param name: The name of the hook, for clients to use when registering.
292
220
self.__doc__ = doc
293
221
self.introduced = introduced
294
222
self.deprecated = deprecated
295
if callbacks is None:
298
self._callbacks = callbacks
224
self._callback_names = {}
301
227
"""Generate the documentation for this HookPoint.
321
247
return '\n'.join(strings)
323
249
def __eq__(self, other):
324
return (type(other) == type(self) and other.__dict__ == self.__dict__)
326
def hook_lazy(self, callback_module, callback_member, callback_label):
327
"""Lazily register a callback to be called when this HookPoint fires.
329
:param callback_module: Module of the callable to use when this
331
:param callback_member: Member name of the callback.
332
:param callback_label: A label to show in the UI while this callback is
335
obj_getter = registry._LazyObjectGetter(callback_module,
337
self._callbacks.append((obj_getter, callback_label))
250
return (type(other) == type(self) and
251
other.__dict__ == self.__dict__)
339
253
def hook(self, callback, callback_label):
340
254
"""Register a callback to be called when this HookPoint fires.
343
257
:param callback_label: A label to show in the UI while this callback is
346
obj_getter = registry._ObjectGetter(callback)
347
self._callbacks.append((obj_getter, callback_label))
349
def uninstall(self, label):
350
"""Uninstall the callback with the specified label.
352
:param label: Label of the entry to uninstall
354
entries_to_remove = []
355
for entry in self._callbacks:
356
(entry_callback, entry_label) = entry
357
if entry_label == label:
358
entries_to_remove.append(entry)
359
if entries_to_remove == []:
360
raise KeyError("No entry with label %r" % label)
361
for entry in entries_to_remove:
362
self._callbacks.remove(entry)
260
self._callbacks.append(callback)
261
if callback_label is not None:
262
self._callback_names[callback] = callback_label
364
264
def __iter__(self):
365
return (callback.get_obj() for callback, name in self._callbacks)
265
return iter(self._callbacks)
367
267
def __len__(self):
368
268
return len(self._callbacks)
372
272
strings.append("<%s(" % type(self).__name__)
373
273
strings.append(self.name)
374
274
strings.append("), callbacks=[")
375
callbacks = self._callbacks
376
for (callback, callback_name) in callbacks:
377
strings.append(repr(callback.get_obj()))
275
for callback in self._callbacks:
276
strings.append(repr(callback))
378
277
strings.append("(")
379
strings.append(callback_name)
278
strings.append(self._callback_names[callback])
380
279
strings.append("),")
381
if len(callbacks) == 1:
280
if len(self._callbacks) == 1:
382
281
strings[-1] = ")"
383
282
strings.append("]>")
384
283
return ''.join(strings)
423
322
hooks = known_hooks_key_to_object(hook_key)
424
323
segments.append(hooks.docs())
425
324
return '\n'.join(segments)
428
# Lazily registered hooks. Maps (module, name, hook_name) tuples
429
# to lists of tuples with objectgetters and names
433
def install_lazy_named_hook(hookpoints_module, hookpoints_name, hook_name,
435
"""Install a callable in to a hook lazily, and label it name.
437
:param hookpoints_module: Module name of the hook points.
438
:param hookpoints_name: Name of the hook points.
439
:param hook_name: A hook name.
440
:param callable: a callable to call for the hook.
441
:param name: A name to associate a_callable with, to show users what is
444
key = (hookpoints_module, hookpoints_name, hook_name)
445
obj_getter = registry._ObjectGetter(a_callable)
446
_lazy_hooks.setdefault(key, []).append((obj_getter, name))
added
removed
bzrlib/hooks.py
