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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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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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bzrlib.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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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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raise NotImplementedError(self.get_password)
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def make_output_stream(self, encoding=None, encoding_type=None):
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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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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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(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()
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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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def _make_output_stream_explicit(self, encoding, encoding_type):
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raise NotImplementedError("%s doesn't support make_output_stream"
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% (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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class CLIUIFactory(UIFactory):
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"""Deprecated in favor of TextUIFactory."""
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@deprecated_method(deprecated_in((1, 18, 0)))
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def __init__(self, stdin=None, stdout=None, stderr=None):
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UIFactory.__init__(self)
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self.stdin = stdin or sys.stdin
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self.stdout = stdout or sys.stdout
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self.stderr = stderr or sys.stderr
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_accepted_boolean_strings = dict(y=True, n=False, yes=True, no=False)
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def get_boolean(self, prompt):
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self.prompt(prompt + "? [y/n]: ")
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line = self.stdin.readline()
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line = line.rstrip('\n')
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val = bool_from_string(line, self._accepted_boolean_strings)
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def get_non_echoed_password(self):
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isatty = getattr(self.stdin, 'isatty', None)
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if isatty is not None and isatty():
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# getpass() ensure the password is not echoed and other
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# cross-platform niceties
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password = getpass.getpass('')
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# echo doesn't make sense without a terminal
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password = self.stdin.readline()
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elif password[-1] == '\n':
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password = password[:-1]
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def get_password(self, prompt='', **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 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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:return: The password string, return None if the user
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canceled the request.
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self.prompt(prompt, **kwargs)
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# There's currently no way to say 'i decline to enter a password'
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# as opposed to 'my password is empty' -- does it matter?
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return self.get_non_echoed_password()
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def get_username(self, prompt, **kwargs):
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"""Prompt the user for a username.
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:param prompt: The prompt to present the user
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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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:return: The username string, return None if the user
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canceled the request.
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self.prompt(prompt, **kwargs)
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username = self.stdin.readline()
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elif username[-1] == '\n':
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username = username[:-1]
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def prompt(self, prompt, **kwargs):
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"""Emit prompt on the CLI.
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def show_error(self, msg):
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"""Show an error message (not an exception) to the user.
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:param kwargs: Dictionary of arguments to insert into the prompt,
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to allow UIs to reformat the prompt.
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The message should not have an error prefix or trailing newline. That
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will be added by the factory if appropriate.
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# See <https://launchpad.net/bugs/365891>
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prompt = prompt % kwargs
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prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
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self.stderr.write(prompt)
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"""Write an already-formatted message."""
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self.stdout.write(msg + '\n')
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raise NotImplementedError(self.show_error)
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def show_message(self, msg):
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"""Show a message to the user."""
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raise NotImplementedError(self.show_message)
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def show_warning(self, msg):
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"""Show a warning to the user."""
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raise NotImplementedError(self.show_warning)
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class SilentUIFactory(UIFactory):
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def get_boolean(self, prompt):
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return self.responses.pop(0)
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def get_integer(self, prompt):
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return self.responses.pop(0)
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def get_password(self, prompt='', **kwargs):
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return self.responses.pop(0)
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def get_username(self, prompt, **kwargs):
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return self.responses.pop(0)
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def assert_all_input_consumed(self):
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if self.responses:
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raise AssertionError("expected all input in %r to be consumed"
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@deprecated_function(deprecated_in((1, 18, 0)))
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def clear_decorator(func, *args, **kwargs):
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"""Decorator that clears the term"""
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ui_factory.clear_term()
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func(*args, **kwargs)
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ui_factory = SilentUIFactory()
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# IMPORTANT: never import this symbol directly. ONLY ever access it as
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# ui.ui_factory, so that you refer to the current value.
added
removed
bzrlib/ui/__init__.py
