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
149
_user_warning_templates = dict(
150
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."),
178
110
def __init__(self):
179
111
self._task_stack = []
180
self.suppressed_warnings = set()
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
def be_quiet(self, state):
201
"""Tell the UI to be more quiet, or not.
203
Typically this suppresses progress bars; the application may also look
204
at ui_factory.is_quiet().
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):
113
def get_password(self, prompt='', **kwargs):
227
114
"""Prompt the user for a password.
229
:param prompt: The prompt to present the user (must be unicode)
116
:param prompt: The prompt to present the user
230
117
:param kwargs: Arguments which will be expanded into the prompt.
231
118
This lets front ends display different things if
239
126
raise NotImplementedError(self.get_password)
244
def make_output_stream(self, encoding=None, encoding_type='replace'):
245
"""Get a stream for sending out bulk text data.
247
This is used for commands that produce bulk text, such as log or diff
248
output, as opposed to user interaction. This should work even for
249
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
251
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
258
(See get_terminal_encoding.)
260
:param encoding_type: How to handle encoding errors:
261
replace/strict/escape/exact. Default is replace.
263
out_stream = self._make_output_stream_explicit(encoding, encoding_type)
266
def _make_output_stream_explicit(self, encoding, encoding_type):
267
raise NotImplementedError("%s doesn't support make_output_stream"
268
% (self.__class__.__name__))
270
128
def nested_progress_bar(self):
271
129
"""Return a nested progress bar.
315
def format_user_warning(self, warning_id, message_args):
317
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)
324
return text_type(template) % message_args
325
except ValueError as e:
326
fail = "brz unprintable warning: %r, %r, %s" % (
327
warning_id, message_args, e)
328
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
173
def get_boolean(self, prompt):
352
174
"""Get a boolean question answered from the user.
354
176
:param prompt: a message to prompt the user with. Should be a single
355
line without terminating \\n.
177
line without terminating \n.
356
178
:return: True or False for y/yes or n/no.
358
choice = self.choose(prompt + '?', '&yes\n&no', default=None)
361
def get_integer(self, prompt):
362
"""Get an integer from the user.
364
:param prompt: a message to prompt the user with. Could be a multi-line
365
prompt but without a terminating \\n.
367
:return: A signed integer.
369
raise NotImplementedError(self.get_integer)
180
raise NotImplementedError(self.get_boolean)
371
182
def make_progress_view(self):
372
183
"""Construct a new ProgressView object for this UI.
396
def log_transport_activity(self, display=False):
397
"""Write out whatever transport activity has been measured.
399
Implementations are allowed to do nothing, but it is useful if they can
400
write a line to the log file.
402
:param display: If False, only log to disk, if True also try to display
403
a message to the user.
406
# Default implementation just does nothing
409
def show_user_warning(self, warning_id, **message_args):
410
"""Show a warning to the user.
412
This is specifically for things that are under the user's control (eg
413
outdated formats), not for internal program warnings like deprecated
416
This can be overridden by UIFactory subclasses to show it in some
417
appropriate way; the default UIFactory is noninteractive and does
418
nothing. format_user_warning maps it to a string, though other
419
presentations can be used for particular UIs.
421
:param warning_id: An identifier like 'cross_format_fetch' used to
422
check if the message is suppressed and to look up the string.
423
:param message_args: Arguments to be interpolated into the message.
427
def show_error(self, msg):
428
"""Show an error message (not an exception) to the user.
430
The message should not have an error prefix or trailing newline. That
431
will be added by the factory if appropriate.
433
raise NotImplementedError(self.show_error)
435
def show_message(self, msg):
436
"""Show a message to the user."""
437
raise NotImplementedError(self.show_message)
439
def show_warning(self, msg):
440
"""Show a warning to the user."""
441
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):
213
class CLIUIFactory(UIFactory):
214
"""Deprecated in favor of TextUIFactory."""
216
@deprecated_method(deprecated_in((1, 18, 0)))
217
def __init__(self, stdin=None, stdout=None, stderr=None):
218
UIFactory.__init__(self)
219
self.stdin = stdin or sys.stdin
220
self.stdout = stdout or sys.stdout
221
self.stderr = stderr or sys.stderr
223
_accepted_boolean_strings = dict(y=True, n=False, yes=True, no=False)
225
def get_boolean(self, prompt):
227
self.prompt(prompt + "? [y/n]: ")
228
line = self.stdin.readline()
229
line = line.rstrip('\n')
230
val = bool_from_string(line, self._accepted_boolean_strings)
234
def get_non_echoed_password(self):
235
isatty = getattr(self.stdin, 'isatty', None)
236
if isatty is not None and isatty():
237
# getpass() ensure the password is not echoed and other
238
# cross-platform niceties
239
password = getpass.getpass('')
241
# echo doesn't make sense without a terminal
242
password = self.stdin.readline()
245
elif password[-1] == '\n':
246
password = password[:-1]
249
def get_password(self, prompt='', **kwargs):
250
"""Prompt the user for a password.
252
:param prompt: The prompt to present the user
253
:param kwargs: Arguments which will be expanded into the prompt.
254
This lets front ends display different things if
256
:return: The password string, return None if the user
257
canceled the request.
260
self.prompt(prompt, **kwargs)
261
# There's currently no way to say 'i decline to enter a password'
262
# as opposed to 'my password is empty' -- does it matter?
263
return self.get_non_echoed_password()
265
def get_username(self, prompt, **kwargs):
266
"""Prompt the user for a username.
268
:param prompt: The prompt to present the user
269
:param kwargs: Arguments which will be expanded into the prompt.
270
This lets front ends display different things if
272
:return: The username string, return None if the user
273
canceled the request.
276
self.prompt(prompt, **kwargs)
277
username = self.stdin.readline()
280
elif username[-1] == '\n':
281
username = username[:-1]
284
def prompt(self, prompt, **kwargs):
285
"""Emit prompt on the CLI.
287
:param kwargs: Dictionary of arguments to insert into the prompt,
288
to allow UIs to reformat the prompt.
291
# See <https://launchpad.net/bugs/365891>
292
prompt = prompt % kwargs
293
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
295
self.stderr.write(prompt)
298
"""Write an already-formatted message."""
299
self.stdout.write(msg + '\n')
302
class SilentUIFactory(UIFactory):
455
303
"""A UI Factory which never prints anything.
457
305
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'.
306
using bzrlib, and it's also active for example inside 'bzr serve'.
460
308
Methods that try to read from the user raise an error; methods that do
461
309
output do nothing.
492
328
def __repr__(self):
493
329
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
331
def get_boolean(self, prompt):
499
332
return self.responses.pop(0)
501
def get_integer(self, prompt):
502
return self.responses.pop(0)
504
def get_password(self, prompt=u'', **kwargs):
334
def get_password(self, prompt='', **kwargs):
505
335
return self.responses.pop(0)
507
337
def get_username(self, prompt, **kwargs):
508
338
return self.responses.pop(0)
510
340
def assert_all_input_consumed(self):
511
341
if self.responses:
512
342
raise AssertionError("expected all input in %r to be consumed"
346
@deprecated_function(deprecated_in((1, 18, 0)))
347
def clear_decorator(func, *args, **kwargs):
348
"""Decorator that clears the term"""
349
ui_factory.clear_term()
350
func(*args, **kwargs)
516
353
ui_factory = SilentUIFactory()