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# Copyright (C) 2005, 2008, 2009 Canonical Ltd
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# Copyright (C) 2005-2010 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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self.stderr = stderr
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# paints progress, network activity, etc
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self._progress_view = self.make_progress_view()
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# hook up the signals to watch for terminal size changes
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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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# 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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def make_progress_view(self):
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"""Construct and return a new ProgressView subclass for this UI.
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# if the user specifically requests either text or no progress bars,
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# always do that. otherwise, guess based on $TERM and tty presence.
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if os.environ.get('BZR_PROGRESS_BAR') == 'text':
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# with --quiet, never any progress view
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# <https://bugs.edge.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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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.clear_term()
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self.stderr.write("bzr: error: %s\n" % msg)
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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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self._term_file = term_file
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# true when there's output on the screen we may need to clear
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self._have_output = False
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# XXX: We could listen for SIGWINCH and update the terminal width...
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# https://launchpad.net/bugs/316357
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self._width = osutils.terminal_width()
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self._last_transport_msg = ''
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self._spin_pos = 0
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# time we last repainted the screen
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self._last_task = None
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self._total_byte_count = 0
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self._bytes_since_update = 0
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self._bytes_by_direction = {'unknown': 0, 'read': 0, 'write': 0}
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self._first_byte_time = None
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self._fraction = 0
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# force the progress bar to be off, as at the moment it doesn't
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# correspond reliably to overall command progress
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self.enable_bar = False
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def _show_line(self, s):
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# sys.stderr.write("progress %r\n" % s)
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if self._width is not None:
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s = '%-*.*s' % (n, n, s)
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width = osutils.terminal_width()
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if width is not None:
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# we need one extra space for terminals that wrap on last char
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s = '%-*.*s' % (width, width, s)
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self._term_file.write('\r' + s + '\r')
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def _render_bar(self):
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# return a string for the progress bar itself
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if (self._last_task is None) or self._last_task.show_bar:
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if self.enable_bar and (
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(self._last_task is None) or self._last_task.show_bar):
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# If there's no task object, we show space for the bar anyhow.
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# That's because most invocations of bzr will end showing progress
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# at some point, though perhaps only after doing some initial IO.
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markers = int(round(float(cols) * completion_fraction)) - 1
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bar_str = '[' + ('#' * markers + spin_str).ljust(cols) + '] '
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elif self._last_task.show_spinner:
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elif (self._last_task is None) or self._last_task.show_spinner:
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# The last task wanted just a spinner, no bar
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spin_str = r'/-\|'[self._spin_pos % 4]
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self._spin_pos += 1
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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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if not self._have_output:
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# As a workaround for <https://launchpad.net/bugs/321935> we only
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# show transport activity when there's already a progress bar
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# shown, which time the application code is expected to know to
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# clear off the progress bar when it's going to send some other
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# output. Eventually it would be nice to have that automatically
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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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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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msg = ("%6dKB %5dKB/s" %
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(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.
added
removed
bzrlib/ui/text.py
