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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Text UI, write output to the console.
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib import (
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from bzrlib.ui import CLIUIFactory
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class TextUIFactory(CLIUIFactory):
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from bzrlib.ui import (
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class TextUIFactory(UIFactory):
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"""A UI factory for Text user interefaces."""
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"""Create a TextUIFactory.
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:param bar_type: The type of progress bar to create. It defaults to
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letting the bzrlib.progress.ProgressBar factory auto
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super(TextUIFactory, self).__init__(stdin=stdin,
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stdout=stdout, stderr=stderr)
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symbol_versioning.warn(symbol_versioning.deprecated_in((1, 11, 0))
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% "bar_type parameter")
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super(TextUIFactory, self).__init__()
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# TODO: there's no good reason not to pass all three streams, maybe we
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# should deprecate the default values...
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# paints progress, network activity, etc
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self._progress_view = TextProgressView(self.stderr)
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self._progress_view = self.make_progress_view()
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def prompt(self, prompt):
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"""Emit prompt on the CLI."""
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self.stdout.write(prompt)
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def be_quiet(self, state):
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if state and not self._quiet:
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UIFactory.be_quiet(self, state)
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self._progress_view = self.make_progress_view()
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def clear_term(self):
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"""Prepare the terminal for output.
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# to clear it. We might need to separately check for the case of
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self._progress_view.clear()
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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().lower()
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if line in ('y\n', 'yes\n'):
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elif line in ('n\n', 'no\n'):
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elif line in ('', None):
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# end-of-file; possibly should raise an error here instead
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def get_integer(self, prompt):
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line = self.stdin.readline()
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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 make_progress_view(self):
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"""Construct and return a new ProgressView subclass for this UI.
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# with --quiet, never any progress view
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# <https://bugs.launchpad.net/bzr/+bug/320035>. Otherwise if the
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# user specifically requests either text or no progress bars, always
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# do that. otherwise, guess based on $TERM and tty presence.
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return NullProgressView()
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elif os.environ.get('BZR_PROGRESS_BAR') == 'text':
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return TextProgressView(self.stderr)
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elif os.environ.get('BZR_PROGRESS_BAR') == 'none':
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return NullProgressView()
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elif progress._supports_progress(self.stderr):
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return TextProgressView(self.stderr)
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return NullProgressView()
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def _make_output_stream_explicit(self, encoding, encoding_type):
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if encoding_type == 'exact':
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# force sys.stdout to be binary stream on win32;
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# NB: this leaves the file set in that mode; may cause problems if
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# one process tries to do binary and then text output
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if sys.platform == 'win32':
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fileno = getattr(self.stdout, 'fileno', None)
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msvcrt.setmode(fileno(), os.O_BINARY)
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return TextUIOutputStream(self, self.stdout)
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encoded_stdout = codecs.getwriter(encoding)(self.stdout,
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errors=encoding_type)
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# For whatever reason codecs.getwriter() does not advertise its encoding
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# it just returns the encoding of the wrapped file, which is completely
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# bogus. So set the attribute, so we can find the correct encoding later.
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encoded_stdout.encoding = encoding
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return TextUIOutputStream(self, encoded_stdout)
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def note(self, msg):
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"""Write an already-formatted message, clearing the progress bar if necessary."""
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self.stdout.write(msg + '\n')
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def prompt(self, prompt, **kwargs):
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"""Emit prompt on the CLI.
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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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# 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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def report_transport_activity(self, transport, byte_count, direction):
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"""Called by transports as they do IO.
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This may update a progress bar, spinner, or similar display.
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By default it does nothing.
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self._progress_view._show_transport_activity(transport,
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self._progress_view.show_transport_activity(transport,
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direction, byte_count)
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def log_transport_activity(self, display=False):
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"""See UIFactory.log_transport_activity()"""
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log = getattr(self._progress_view, 'log_transport_activity', None)
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def show_error(self, msg):
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self.stderr.write("bzr: error: %s\n" % msg)
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def show_message(self, msg):
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def show_warning(self, msg):
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if isinstance(msg, unicode):
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te = osutils.get_terminal_encoding()
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msg = msg.encode(te, 'replace')
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self.stderr.write("bzr: warning: %s\n" % msg)
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def _progress_updated(self, task):
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"""A task has been updated and wants to be displayed.
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warnings.warn("%r updated but no tasks are active" %
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elif task != self._task_stack[-1]:
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warnings.warn("%r is not the top progress task %r" %
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(task, self._task_stack[-1]))
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# We used to check it was the top task, but it's hard to always
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# get this right and it's not necessarily useful: any actual
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# problems will be evident in use
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#warnings.warn("%r is not the top progress task %r" %
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# (task, self._task_stack[-1]))
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self._progress_view.show_progress(task)
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def _progress_all_finished(self):
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self._progress_view.clear()
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def show_user_warning(self, warning_id, **message_args):
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"""Show a text message to the user.
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Explicitly not for warnings about bzr apis, deprecations or internals.
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# eventually trace.warning should migrate here, to avoid logging and
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# be easier to test; that has a lot of test fallout so for now just
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# new code can call this
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if warning_id not in self.suppressed_warnings:
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self.stderr.write(self.format_user_warning(warning_id, message_args) +
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class TextProgressView(object):
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"""Display of progress bar and other information on a tty.
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t = t._parent_task
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m = t.msg + ':' + m
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def _render_line(self):
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bar_string = self._render_bar()
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if self._last_task:
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task_msg = self._format_task(self._last_task)
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trans = self._last_transport_msg
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return (bar_string + trans + task_msg)
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task_part, counter_part = self._format_task(self._last_task)
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task_part = counter_part = ''
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if self._last_task and not self._last_task.show_transport_activity:
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trans = self._last_transport_msg
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# the bar separates the transport activity from the message, so even
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# if there's no bar or spinner, we must show something if both those
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if (task_part or trans) and not bar_string:
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# preferentially truncate the task message if we don't have enough
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avail_width = self._avail_width()
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if avail_width is not None:
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# if terminal avail_width is unknown, don't truncate
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current_len = len(bar_string) + len(trans) + len(task_part) + len(counter_part)
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gap = current_len - avail_width
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task_part = task_part[:-gap-2] + '..'
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s = trans + bar_string + task_part + counter_part
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if avail_width is not None:
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if len(s) < avail_width:
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s = s.ljust(avail_width)
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elif len(s) > avail_width:
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def _repaint(self):
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s = self._render_line()
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self._last_repaint = now
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def _show_transport_activity(self, transport, direction, byte_count):
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def show_transport_activity(self, transport, direction, byte_count):
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"""Called by transports via the ui_factory, as they do IO.
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This may update a progress bar, spinner, or similar display.
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By default it does nothing.
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# XXX: Probably there should be a transport activity model, and that
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# too should be seen by the progress view, rather than being poked in
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# XXX: there should be a transport activity model, and that too should
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# be seen by the progress view, rather than being poked in here.
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self._total_byte_count += byte_count
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self._bytes_since_update += byte_count
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if self._first_byte_time is None:
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# Note that this isn't great, as technically it should be the time
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# when the bytes started transferring, not when they completed.
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# However, we usually start with a small request anyway.
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self._first_byte_time = time.time()
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if direction in self._bytes_by_direction:
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self._bytes_by_direction[direction] += byte_count
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self._bytes_by_direction['unknown'] += byte_count
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if 'no_activity' in debug.debug_flags:
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# Can be used as a workaround if
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# <https://launchpad.net/bugs/321935> reappears and transport
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# activity is cluttering other output. However, thanks to
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# TextUIOutputStream this shouldn't be a problem any more.
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now = time.time()
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if self._total_byte_count < 2000:
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# a little resistance at first, so it doesn't stay stuck at 0
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# while connecting...
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if self._transport_update_time is None:
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self._transport_update_time = now
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elif now >= (self._transport_update_time + 0.5):
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# guard against clock stepping backwards, and don't update too
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rate = self._bytes_since_update / (now - self._transport_update_time)
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scheme = getattr(transport, '_scheme', None) or repr(transport)
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if direction == 'read':
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elif direction == 'write':
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msg = ("%.7s %s %6dKB %5dKB/s" %
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(scheme, dir_char, self._total_byte_count>>10, int(rate)>>10,))
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rate = (self._bytes_since_update
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/ (now - self._transport_update_time))
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# using base-10 units (see HACKING.txt).
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msg = ("%6dkB %5dkB/s " %
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(self._total_byte_count / 1000, int(rate) / 1000,))
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self._transport_update_time = now
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self._last_repaint = now
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self._bytes_since_update = 0
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self._last_transport_msg = msg
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def _format_bytes_by_direction(self):
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if self._first_byte_time is None:
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transfer_time = time.time() - self._first_byte_time
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if transfer_time < 0.001:
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transfer_time = 0.001
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bps = self._total_byte_count / transfer_time
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# using base-10 units (see HACKING.txt).
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msg = ('Transferred: %.0fkB'
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' (%.1fkB/s r:%.0fkB w:%.0fkB'
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% (self._total_byte_count / 1000.,
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self._bytes_by_direction['read'] / 1000.,
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self._bytes_by_direction['write'] / 1000.,
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if self._bytes_by_direction['unknown'] > 0:
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msg += ' u:%.0fkB)' % (
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self._bytes_by_direction['unknown'] / 1000.
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def log_transport_activity(self, display=False):
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msg = self._format_bytes_by_direction()
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if display and self._total_byte_count > 0:
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self._term_file.write(msg + '\n')
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class TextUIOutputStream(object):
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"""Decorates an output stream so that the terminal is cleared before writing.
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This is supposed to ensure that the progress bar does not conflict with bulk
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# XXX: this does not handle the case of writing part of a line, then doing
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# progress bar output: the progress bar will probably write over it.
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# one option is just to buffer that text until we have a full line;
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# another is to save and restore it
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# XXX: might need to wrap more methods
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def __init__(self, ui_factory, wrapped_stream):
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self.ui_factory = ui_factory
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self.wrapped_stream = wrapped_stream
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# this does no transcoding, but it must expose the underlying encoding
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# because some callers need to know what can be written - see for
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# example unescape_for_display.
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self.encoding = getattr(wrapped_stream, 'encoding', None)
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self.ui_factory.clear_term()
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self.wrapped_stream.flush()
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def write(self, to_write):
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self.ui_factory.clear_term()
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self.wrapped_stream.write(to_write)
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def writelines(self, lines):
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self.ui_factory.clear_term()
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self.wrapped_stream.writelines(lines)
added
removed
bzrlib/ui/text.py
