22
22
Several levels are supported, and you can also register new factories such as
26
26
Semi-abstract base class
28
breezy.ui.SilentUIFactory
28
bzrlib.ui.SilentUIFactory
29
29
Produces no output and cannot take any input; useful for programs using
30
breezy in batch mode or for programs such as loggerhead.
30
bzrlib in batch mode or for programs such as loggerhead.
32
breezy.ui.CannedInputUIFactory
33
For use in testing; the input values to be returned are provided
32
bzrlib.ui.CannedInputUIFactory
33
For use in testing; the input values to be returned are provided
36
breezy.ui.text.TextUIFactory
36
bzrlib.ui.text.TextUIFactory
37
37
Standard text command-line interface, with stdin, stdout, stderr.
38
38
May make more or less advanced use of them, eg in drawing progress bars,
39
39
depending on the detected capabilities of the terminal.
100
class ConfirmationUserInterfacePolicy(object):
101
"""Wrapper for a UIFactory that allows or denies all confirmed actions."""
103
def __init__(self, wrapped_ui, default_answer, specific_answers):
104
"""Generate a proxy UI that does no confirmations.
106
:param wrapped_ui: Underlying UIFactory.
107
:param default_answer: Bool for whether requests for
108
confirmation from the user should be noninteractively accepted or
110
:param specific_answers: Map from confirmation_id to bool answer.
112
self.wrapped_ui = wrapped_ui
113
self.default_answer = default_answer
114
self.specific_answers = specific_answers
116
def __getattr__(self, name):
117
return getattr(self.wrapped_ui, name)
120
return '%s(%r, %r, %r)' % (
121
self.__class__.__name__,
124
self.specific_answers)
126
def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
127
if confirmation_id in self.specific_answers:
128
return self.specific_answers[confirmation_id]
129
elif self.default_answer is not None:
130
return self.default_answer
132
return self.wrapped_ui.confirm_action(
133
prompt, confirmation_id, prompt_kwargs)
136
103
class UIFactory(object):
137
104
"""UI abstraction.
139
106
This tells the library how to display things to the user. Through this
140
107
layer different applications can choose the style of UI.
142
UI Factories are also context managers, for some syntactic sugar some users
145
:ivar suppressed_warnings: Identifiers for user warnings that should
109
:ivar suppressed_warnings: Identifiers for user warnings that should
149
113
_user_warning_templates = dict(
150
114
cross_format_fetch=("Doing on-the-fly conversion from "
151
"%(from_format)s to %(to_format)s.\n"
152
"This may take some time. Upgrade the repositories to the "
153
"same format for better performance."
155
experimental_format_fetch=("Fetching into experimental format "
157
"This format may be unreliable or change in the future "
158
"without an upgrade path.\n"),
160
"The command 'brz %(deprecated_name)s' "
161
"has been deprecated in brz %(deprecated_in_version)s. "
162
"Please use 'brz %(recommended_name)s' instead."),
163
deprecated_command_option=(
164
"The option '%(deprecated_name)s' to 'brz %(command)s' "
165
"has been deprecated in brz %(deprecated_in_version)s. "
166
"Please use '%(recommended_name)s' instead."),
167
recommend_upgrade=("%(current_format_name)s is deprecated "
168
"and a better format is available.\n"
169
"It is recommended that you upgrade by "
170
"running the command\n"
171
" brz upgrade %(basedir)s"),
173
u"Stole dead lock %(lock_url)s %(other_holder_info)s."),
174
not_checking_ssl_cert=(
175
u"Not checking SSL certificate for %(host)s."),
115
"%(from_format)s to %(to_format)s.\n"
116
"This may take some time. Upgrade the repositories to the "
117
"same format for better performance."
178
121
def __init__(self):
180
123
self.suppressed_warnings = set()
181
124
self._quiet = False
184
"""Context manager entry support.
186
Override in a concrete factory class if initialisation before use is
189
return self # This is bound to the 'as' clause in a with statement.
191
def __exit__(self, exc_type, exc_val, exc_tb):
192
"""Context manager exit support.
194
Override in a concrete factory class if more cleanup than a simple
195
self.clear_term() is needed when the UIFactory is finished with.
198
return False # propogate exceptions.
200
126
def be_quiet(self, state):
201
127
"""Tell the UI to be more quiet, or not.
206
132
self._quiet = state
208
def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
209
"""Seek user confirmation for an action.
211
If the UI is noninteractive, or the user does not want to be asked
212
about this action, True is returned, indicating brz should just
215
The confirmation id allows the user to configure certain actions to
216
always be confirmed or always denied, and for UIs to specialize the
217
display of particular confirmations.
219
:param prompt: Suggested text to display to the user.
220
:param prompt_kwargs: A dictionary of arguments that can be
221
string-interpolated into the prompt.
222
:param confirmation_id: Unique string identifier for the confirmation.
224
return self.get_boolean(prompt % prompt_kwargs)
226
def get_password(self, prompt=u'', **kwargs):
134
def get_password(self, prompt='', **kwargs):
227
135
"""Prompt the user for a password.
229
:param prompt: The prompt to present the user (must be unicode)
137
:param prompt: The prompt to present the user
230
138
:param kwargs: Arguments which will be expanded into the prompt.
231
139
This lets front ends display different things if
241
149
def is_quiet(self):
242
150
return self._quiet
244
def make_output_stream(self, encoding=None, encoding_type='replace'):
152
def make_output_stream(self, encoding=None, encoding_type=None):
245
153
"""Get a stream for sending out bulk text data.
247
155
This is used for commands that produce bulk text, such as log or diff
248
156
output, as opposed to user interaction. This should work even for
249
157
non-interactive user interfaces. Typically this goes to a decorated
250
version of stdout, but in a GUI it might be appropriate to send it to a
158
version of stdout, but in a GUI it might be appropriate to send it to a
251
159
window displaying the text.
253
The caller may flush but should not close the returned stream.
255
:param encoding: Unicode encoding for output; if not specified
256
uses the configured 'output_encoding' if any; otherwise the
161
:param encoding: Unicode encoding for output; default is the
162
terminal encoding, which may be different from the user encoding.
258
163
(See get_terminal_encoding.)
260
165
:param encoding_type: How to handle encoding errors:
261
166
replace/strict/escape/exact. Default is replace.
168
# XXX: is the caller supposed to close the resulting object?
170
encoding = osutils.get_terminal_encoding()
171
if encoding_type is None:
172
encoding_type = 'replace'
263
173
out_stream = self._make_output_stream_explicit(encoding, encoding_type)
264
174
return out_stream
266
176
def _make_output_stream_explicit(self, encoding, encoding_type):
267
177
raise NotImplementedError("%s doesn't support make_output_stream"
268
% (self.__class__.__name__))
178
% (self.__class__.__name__))
270
180
def nested_progress_bar(self):
271
181
"""Return a nested progress bar.
284
194
"""Called by the ProgressTask when it finishes"""
285
195
if not self._task_stack:
286
196
warnings.warn("%r finished but nothing is active"
288
198
if task in self._task_stack:
289
199
self._task_stack.remove(task)
291
201
warnings.warn("%r is not in active stack %r"
292
% (task, self._task_stack))
202
% (task, self._task_stack))
293
203
if not self._task_stack:
294
204
self._progress_all_finished()
317
227
template = self._user_warning_templates[warning_id]
319
fail = "brz warning: %r, %r" % (warning_id, message_args)
320
warnings.warn("no template for warning: "
321
+ fail) # so tests will fail etc
322
return text_type(fail)
229
fail = "failed to format warning %r, %r" % (warning_id, message_args)
230
warnings.warn(fail) # so tests will fail etc
324
return text_type(template) % message_args
325
except ValueError as e:
326
fail = "brz unprintable warning: %r, %r, %s" % (
233
return template % message_args
234
except ValueError, e:
235
fail = "failed to format warning %r, %r: %s" % (
327
236
warning_id, message_args, e)
328
237
warnings.warn(fail) # so tests will fail etc
329
return text_type(fail)
331
def choose(self, msg, choices, default=None):
332
"""Prompt the user for a list of alternatives.
334
:param msg: message to be shown as part of the prompt.
336
:param choices: list of choices, with the individual choices separated
337
by '\n', e.g.: choose("Save changes?", "&Yes\n&No\n&Cancel"). The
338
letter after the '&' is the shortcut key for that choice. Thus you
339
can type 'c' to select "Cancel". Shorcuts are case insensitive.
340
The shortcut does not need to be the first letter. If a shorcut key
341
is not provided, the first letter for the choice will be used.
343
:param default: default choice (index), returned for example when enter
344
is pressed for the console version.
346
:return: the index fo the user choice (so '0', '1' or '2' for
347
respectively yes/no/cancel in the previous example).
349
raise NotImplementedError(self.choose)
351
240
def get_boolean(self, prompt):
352
241
"""Get a boolean question answered from the user.
354
243
:param prompt: a message to prompt the user with. Should be a single
355
line without terminating \\n.
244
line without terminating \n.
356
245
:return: True or False for y/yes or n/no.
358
choice = self.choose(prompt + '?', '&yes\n&no', default=None)
247
raise NotImplementedError(self.get_boolean)
361
249
def get_integer(self, prompt):
362
250
"""Get an integer from the user.
364
252
:param prompt: a message to prompt the user with. Could be a multi-line
365
prompt but without a terminating \\n.
253
prompt but without a terminating \n.
367
255
:return: A signed integer.
377
265
return NullProgressView()
379
def recommend_upgrade(self, current_format_name, basedir):
380
"""Recommend the user upgrade a control directory.
382
:param current_format_name: Description of the current format
383
:param basedir: Location of the control dir
385
self.show_user_warning('recommend_upgrade',
386
current_format_name=current_format_name, basedir=basedir)
267
def recommend_upgrade(self,
270
# XXX: this should perhaps be in the TextUIFactory and the default can do
273
# XXX: Change to show_user_warning - that will accomplish the previous
274
# xxx. -- mbp 2010-02-25
275
trace.warning("%s is deprecated "
276
"and a better format is available.\n"
277
"It is recommended that you upgrade by "
278
"running the command\n"
388
283
def report_transport_activity(self, transport, byte_count, direction):
389
284
"""Called by transports as they do IO.
413
308
outdated formats), not for internal program warnings like deprecated
416
This can be overridden by UIFactory subclasses to show it in some
311
This can be overridden by UIFactory subclasses to show it in some
417
312
appropriate way; the default UIFactory is noninteractive and does
418
313
nothing. format_user_warning maps it to a string, though other
419
314
presentations can be used for particular UIs.
421
:param warning_id: An identifier like 'cross_format_fetch' used to
316
:param warning_id: An identifier like 'cross_format_fetch' used to
422
317
check if the message is suppressed and to look up the string.
423
318
:param message_args: Arguments to be interpolated into the message.
440
335
"""Show a warning to the user."""
441
336
raise NotImplementedError(self.show_warning)
444
class NoninteractiveUIFactory(UIFactory):
445
"""Base class for UIs with no user."""
447
def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
451
return '%s()' % (self.__class__.__name__, )
454
class SilentUIFactory(NoninteractiveUIFactory):
338
def warn_cross_format_fetch(self, from_format, to_format):
339
"""Warn about a potentially slow cross-format transfer.
341
This is deprecated in favor of show_user_warning, but retained for api
342
compatibility in 2.0 and 2.1.
344
self.show_user_warning('cross_format_fetch', from_format=from_format,
347
def warn_experimental_format_fetch(self, inter):
348
"""Warn about fetching into experimental repository formats."""
349
if inter.target._format.experimental:
350
trace.warning("Fetching into experimental format %s.\n"
351
"This format may be unreliable or change in the future "
352
"without an upgrade path.\n" % (inter.target._format,))
356
class SilentUIFactory(UIFactory):
455
357
"""A UI Factory which never prints anything.
457
359
This is the default UI, if another one is never registered by a program
458
using breezy, and it's also active for example inside 'brz serve'.
360
using bzrlib, and it's also active for example inside 'bzr serve'.
460
362
Methods that try to read from the user raise an error; methods that do
461
363
output do nothing.
492
394
def __repr__(self):
493
395
return "%s(%r)" % (self.__class__.__name__, self.responses)
495
def confirm_action(self, prompt, confirmation_id, args):
496
return self.get_boolean(prompt % args)
498
397
def get_boolean(self, prompt):
499
398
return self.responses.pop(0)
501
400
def get_integer(self, prompt):
502
401
return self.responses.pop(0)
504
def get_password(self, prompt=u'', **kwargs):
403
def get_password(self, prompt='', **kwargs):
505
404
return self.responses.pop(0)
507
406
def get_username(self, prompt, **kwargs):