22
22
Several levels are supported, and you can also register new factories such as
26
26
Semi-abstract base class
28
bzrlib.ui.SilentUIFactory
28
breezy.ui.SilentUIFactory
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Produces no output and cannot take any input; useful for programs using
30
bzrlib in batch mode or for programs such as loggerhead.
30
breezy in batch mode or for programs such as loggerhead.
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bzrlib.ui.CannedInputUIFactory
33
For use in testing; the input values to be returned are provided
32
breezy.ui.CannedInputUIFactory
33
For use in testing; the input values to be returned are provided
36
bzrlib.ui.text.TextUIFactory
36
breezy.ui.text.TextUIFactory
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Standard text command-line interface, with stdin, stdout, stderr.
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May make more or less advanced use of them, eg in drawing progress bars,
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depending on the detected capabilities of the terminal.
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class ConfirmationUserInterfacePolicy(object):
93
"""Wrapper for a UIFactory that allows or denies all confirmed actions."""
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def __init__(self, wrapped_ui, default_answer, specific_answers):
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"""Generate a proxy UI that does no confirmations.
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:param wrapped_ui: Underlying UIFactory.
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:param default_answer: Bool for whether requests for
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confirmation from the user should be noninteractively accepted or
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:param specific_answers: Map from confirmation_id to bool answer.
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self.wrapped_ui = wrapped_ui
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self.default_answer = default_answer
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self.specific_answers = specific_answers
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def __getattr__(self, name):
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return getattr(self.wrapped_ui, name)
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return '%s(%r, %r, %r)' % (
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self.__class__.__name__,
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self.specific_answers)
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def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
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if confirmation_id in self.specific_answers:
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return self.specific_answers[confirmation_id]
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elif self.default_answer is not None:
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return self.default_answer
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return self.wrapped_ui.confirm_action(
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prompt, confirmation_id, prompt_kwargs)
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class UIFactory(object):
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"""UI abstraction.
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This tells the library how to display things to the user. Through this
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layer different applications can choose the style of UI.
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:ivar suppressed_warnings: Identifiers for user warnings that should
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UI Factories are also context managers, for some syntactic sugar some users
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:ivar suppressed_warnings: Identifiers for user warnings that should
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_user_warning_templates = dict(
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cross_format_fetch=("Doing on-the-fly conversion from "
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"%(from_format)s to %(to_format)s.\n"
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"This may take some time. Upgrade the repositories to the "
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"same format for better performance."
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"%(from_format)s to %(to_format)s.\n"
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"This may take some time. Upgrade the repositories to the "
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"same format for better performance."
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experimental_format_fetch=("Fetching into experimental format "
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"This format may be unreliable or change in the future "
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"without an upgrade path.\n"),
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"The command 'brz %(deprecated_name)s' "
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"has been deprecated in brz %(deprecated_in_version)s. "
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"Please use 'brz %(recommended_name)s' instead."),
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deprecated_command_option=(
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"The option '%(deprecated_name)s' to 'brz %(command)s' "
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"has been deprecated in brz %(deprecated_in_version)s. "
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"Please use '%(recommended_name)s' instead."),
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recommend_upgrade=("%(current_format_name)s is deprecated "
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"and a better format is available.\n"
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"It is recommended that you upgrade by "
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"running the command\n"
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" brz upgrade %(basedir)s"),
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u"Stole dead lock %(lock_url)s %(other_holder_info)s."),
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not_checking_ssl_cert=(
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u"Not checking SSL certificate for %(host)s."),
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def __init__(self):
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self.suppressed_warnings = set()
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self._quiet = False
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"""Context manager entry support.
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Override in a concrete factory class if initialisation before use is
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return self # This is bound to the 'as' clause in a with statement.
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def __exit__(self, exc_type, exc_val, exc_tb):
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"""Context manager exit support.
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Override in a concrete factory class if more cleanup than a simple
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self.clear_term() is needed when the UIFactory is finished with.
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return False # propogate exceptions.
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def be_quiet(self, state):
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"""Tell the UI to be more quiet, or not.
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self._quiet = state
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def get_password(self, prompt='', **kwargs):
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def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
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"""Seek user confirmation for an action.
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If the UI is noninteractive, or the user does not want to be asked
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about this action, True is returned, indicating brz should just
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The confirmation id allows the user to configure certain actions to
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always be confirmed or always denied, and for UIs to specialize the
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display of particular confirmations.
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:param prompt: Suggested text to display to the user.
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:param prompt_kwargs: A dictionary of arguments that can be
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string-interpolated into the prompt.
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:param confirmation_id: Unique string identifier for the confirmation.
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return self.get_boolean(prompt % prompt_kwargs)
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def get_password(self, prompt=u'', **kwargs):
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"""Prompt the user for a password.
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:param prompt: The prompt to present the user
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:param prompt: The prompt to present the user (must be unicode)
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:param kwargs: Arguments which will be expanded into the prompt.
139
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This lets front ends display different things if
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def is_quiet(self):
150
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return self._quiet
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def make_output_stream(self, encoding=None, encoding_type=None):
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def make_output_stream(self, encoding=None, encoding_type='replace'):
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"""Get a stream for sending out bulk text data.
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This is used for commands that produce bulk text, such as log or diff
156
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output, as opposed to user interaction. This should work even for
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non-interactive user interfaces. Typically this goes to a decorated
158
version of stdout, but in a GUI it might be appropriate to send it to a
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version of stdout, but in a GUI it might be appropriate to send it to a
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window displaying the text.
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:param encoding: Unicode encoding for output; default is the
162
terminal encoding, which may be different from the user encoding.
245
The caller may flush but should not close the returned stream.
247
:param encoding: Unicode encoding for output; if not specified
248
uses the configured 'output_encoding' if any; otherwise the
163
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(See get_terminal_encoding.)
165
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:param encoding_type: How to handle encoding errors:
166
253
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'
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255
out_stream = self._make_output_stream_explicit(encoding, encoding_type)
174
256
return out_stream
176
258
def _make_output_stream_explicit(self, encoding, encoding_type):
177
259
raise NotImplementedError("%s doesn't support make_output_stream"
178
% (self.__class__.__name__))
260
% (self.__class__.__name__))
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def nested_progress_bar(self):
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"""Return a nested progress bar.
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"""Called by the ProgressTask when it finishes"""
195
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if not self._task_stack:
196
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warnings.warn("%r finished but nothing is active"
198
280
if task in self._task_stack:
199
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self._task_stack.remove(task)
201
283
warnings.warn("%r is not in active stack %r"
202
% (task, self._task_stack))
284
% (task, self._task_stack))
203
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if not self._task_stack:
204
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self._progress_all_finished()
227
309
template = self._user_warning_templates[warning_id]
229
fail = "failed to format warning %r, %r" % (warning_id, message_args)
230
warnings.warn(fail) # so tests will fail etc
311
fail = "brz warning: %r, %r" % (warning_id, message_args)
312
warnings.warn("no template for warning: "
313
+ fail) # so tests will fail etc
233
return template % message_args
234
except ValueError, e:
235
fail = "failed to format warning %r, %r: %s" % (
316
return str(template) % message_args
317
except ValueError as e:
318
fail = "brz unprintable warning: %r, %r, %s" % (
236
319
warning_id, message_args, e)
237
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warnings.warn(fail) # so tests will fail etc
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def choose(self, msg, choices, default=None):
324
"""Prompt the user for a list of alternatives.
326
:param msg: message to be shown as part of the prompt.
328
:param choices: list of choices, with the individual choices separated
329
by '\n', e.g.: choose("Save changes?", "&Yes\n&No\n&Cancel"). The
330
letter after the '&' is the shortcut key for that choice. Thus you
331
can type 'c' to select "Cancel". Shorcuts are case insensitive.
332
The shortcut does not need to be the first letter. If a shorcut key
333
is not provided, the first letter for the choice will be used.
335
:param default: default choice (index), returned for example when enter
336
is pressed for the console version.
338
:return: the index fo the user choice (so '0', '1' or '2' for
339
respectively yes/no/cancel in the previous example).
341
raise NotImplementedError(self.choose)
240
343
def get_boolean(self, prompt):
241
344
"""Get a boolean question answered from the user.
243
346
:param prompt: a message to prompt the user with. Should be a single
244
line without terminating \n.
347
line without terminating \\n.
245
348
:return: True or False for y/yes or n/no.
247
raise NotImplementedError(self.get_boolean)
350
choice = self.choose(prompt + '?', '&yes\n&no', default=None)
249
353
def get_integer(self, prompt):
250
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"""Get an integer from the user.
252
356
:param prompt: a message to prompt the user with. Could be a multi-line
253
prompt but without a terminating \n.
357
prompt but without a terminating \\n.
255
359
:return: A signed integer.
265
369
return NullProgressView()
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"
371
def recommend_upgrade(self, current_format_name, basedir):
372
"""Recommend the user upgrade a control directory.
374
:param current_format_name: Description of the current format
375
:param basedir: Location of the control dir
377
self.show_user_warning('recommend_upgrade',
378
current_format_name=current_format_name, basedir=basedir)
283
380
def report_transport_activity(self, transport, byte_count, direction):
284
381
"""Called by transports as they do IO.
308
405
outdated formats), not for internal program warnings like deprecated
311
This can be overridden by UIFactory subclasses to show it in some
408
This can be overridden by UIFactory subclasses to show it in some
312
409
appropriate way; the default UIFactory is noninteractive and does
313
410
nothing. format_user_warning maps it to a string, though other
314
411
presentations can be used for particular UIs.
316
:param warning_id: An identifier like 'cross_format_fetch' used to
413
:param warning_id: An identifier like 'cross_format_fetch' used to
317
414
check if the message is suppressed and to look up the string.
318
415
:param message_args: Arguments to be interpolated into the message.
335
432
"""Show a warning to the user."""
336
433
raise NotImplementedError(self.show_warning)
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):
436
class NoninteractiveUIFactory(UIFactory):
437
"""Base class for UIs with no user."""
439
def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
443
return '%s()' % (self.__class__.__name__, )
446
class SilentUIFactory(NoninteractiveUIFactory):
357
447
"""A UI Factory which never prints anything.
359
449
This is the default UI, if another one is never registered by a program
360
using bzrlib, and it's also active for example inside 'bzr serve'.
450
using breezy, and it's also active for example inside 'brz serve'.
362
452
Methods that try to read from the user raise an error; methods that do
363
453
output do nothing.
394
484
def __repr__(self):
395
485
return "%s(%r)" % (self.__class__.__name__, self.responses)
487
def confirm_action(self, prompt, confirmation_id, args):
488
return self.get_boolean(prompt % args)
397
490
def get_boolean(self, prompt):
398
491
return self.responses.pop(0)
400
493
def get_integer(self, prompt):
401
494
return self.responses.pop(0)
403
def get_password(self, prompt='', **kwargs):
496
def get_password(self, prompt=u'', **kwargs):
404
497
return self.responses.pop(0)
406
499
def get_username(self, prompt, **kwargs):