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Several levels are supported, and you can also register new factories such as
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Semi-abstract base class
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bzrlib.ui.SilentUIFactory
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breezy.ui.SilentUIFactory
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Produces no output and cannot take any input; useful for programs using
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bzrlib in batch mode or for programs such as loggerhead.
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breezy in batch mode or for programs such as loggerhead.
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bzrlib.ui.CannedInputUIFactory
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For use in testing; the input values to be returned are provided
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breezy.ui.CannedInputUIFactory
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For use in testing; the input values to be returned are provided
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bzrlib.ui.text.TextUIFactory
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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):
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"""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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"%(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.
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This lets front ends display different things if
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def is_quiet(self):
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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
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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
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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
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terminal encoding, which may be different from the user encoding.
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The caller may flush but should not close the returned stream.
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:param encoding: Unicode encoding for output; if not specified
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uses the configured 'output_encoding' if any; otherwise the
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(See get_terminal_encoding.)
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:param encoding_type: How to handle encoding errors:
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replace/strict/escape/exact. Default is replace.
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# XXX: is the caller supposed to close the resulting object?
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encoding = osutils.get_terminal_encoding()
171
if encoding_type is None:
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encoding_type = 'replace'
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out_stream = self._make_output_stream_explicit(encoding, encoding_type)
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return out_stream
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template = self._user_warning_templates[warning_id]
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fail = "failed to format warning %r, %r" % (warning_id, message_args)
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warnings.warn(fail) # so tests will fail etc
319
fail = "brz warning: %r, %r" % (warning_id, message_args)
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warnings.warn("no template for warning: " + fail) # so tests will fail etc
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return text_type(fail)
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return template % message_args
234
except ValueError, e:
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fail = "failed to format warning %r, %r: %s" % (
323
return text_type(template) % message_args
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except ValueError as e:
325
fail = "brz unprintable warning: %r, %r, %s" % (
236
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warning_id, message_args, e)
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warnings.warn(fail) # so tests will fail etc
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return text_type(fail)
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def choose(self, msg, choices, default=None):
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"""Prompt the user for a list of alternatives.
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:param msg: message to be shown as part of the prompt.
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:param choices: list of choices, with the individual choices separated
336
by '\n', e.g.: choose("Save changes?", "&Yes\n&No\n&Cancel"). The
337
letter after the '&' is the shortcut key for that choice. Thus you
338
can type 'c' to select "Cancel". Shorcuts are case insensitive.
339
The shortcut does not need to be the first letter. If a shorcut key
340
is not provided, the first letter for the choice will be used.
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:param default: default choice (index), returned for example when enter
343
is pressed for the console version.
345
:return: the index fo the user choice (so '0', '1' or '2' for
346
respectively yes/no/cancel in the previous example).
348
raise NotImplementedError(self.choose)
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def get_boolean(self, prompt):
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"""Get a boolean question answered from the user.
243
353
:param prompt: a message to prompt the user with. Should be a single
244
line without terminating \n.
354
line without terminating \\n.
245
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:return: True or False for y/yes or n/no.
247
raise NotImplementedError(self.get_boolean)
357
choice = self.choose(prompt + '?', '&yes\n&no', default=None)
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360
def get_integer(self, prompt):
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"""Get an integer from the user.
252
363
:param prompt: a message to prompt the user with. Could be a multi-line
253
prompt but without a terminating \n.
364
prompt but without a terminating \\n.
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:return: A signed integer.
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return NullProgressView()
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def recommend_upgrade(self,
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# XXX: this should perhaps be in the TextUIFactory and the default can do
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# XXX: Change to show_user_warning - that will accomplish the previous
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# xxx. -- mbp 2010-02-25
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trace.warning("%s is deprecated "
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"and a better format is available.\n"
277
"It is recommended that you upgrade by "
278
"running the command\n"
378
def recommend_upgrade(self, current_format_name, basedir):
379
"""Recommend the user upgrade a control directory.
381
:param current_format_name: Description of the current format
382
:param basedir: Location of the control dir
384
self.show_user_warning('recommend_upgrade',
385
current_format_name=current_format_name, basedir=basedir)
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387
def report_transport_activity(self, transport, byte_count, direction):
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388
"""Called by transports as they do IO.
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412
outdated formats), not for internal program warnings like deprecated
311
This can be overridden by UIFactory subclasses to show it in some
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This can be overridden by UIFactory subclasses to show it in some
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416
appropriate way; the default UIFactory is noninteractive and does
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417
nothing. format_user_warning maps it to a string, though other
314
418
presentations can be used for particular UIs.
316
:param warning_id: An identifier like 'cross_format_fetch' used to
420
:param warning_id: An identifier like 'cross_format_fetch' used to
317
421
check if the message is suppressed and to look up the string.
318
422
:param message_args: Arguments to be interpolated into the message.
335
439
"""Show a warning to the user."""
336
440
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):
443
class NoninteractiveUIFactory(UIFactory):
444
"""Base class for UIs with no user."""
446
def confirm_action(self, prompt, confirmation_id, prompt_kwargs):
450
return '%s()' % (self.__class__.__name__, )
453
class SilentUIFactory(NoninteractiveUIFactory):
357
454
"""A UI Factory which never prints anything.
359
456
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'.
457
using breezy, and it's also active for example inside 'brz serve'.
362
459
Methods that try to read from the user raise an error; methods that do
363
460
output do nothing.
394
491
def __repr__(self):
395
492
return "%s(%r)" % (self.__class__.__name__, self.responses)
494
def confirm_action(self, prompt, confirmation_id, args):
495
return self.get_boolean(prompt % args)
397
497
def get_boolean(self, prompt):
398
498
return self.responses.pop(0)
400
500
def get_integer(self, prompt):
401
501
return self.responses.pop(0)
403
def get_password(self, prompt='', **kwargs):
503
def get_password(self, prompt=u'', **kwargs):
404
504
return self.responses.pop(0)
406
506
def get_username(self, prompt, **kwargs):