1
# Copyright (C) 2005, 2006, 2008, 2009 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18
"""Progress indicators.
20
The usual way to use this is via bzrlib.ui.ui_factory.nested_progress_bar which
21
will manage a conceptual stack of nested activities.
33
from bzrlib.trace import mutter
34
from bzrlib.symbol_versioning import (
41
def _supports_progress(f):
42
"""Detect if we can use pretty progress bars on file F.
44
If this returns true we expect that a human may be looking at that
45
output, and that we can repaint a line to update it.
47
This doesn't check the policy for whether we *should* use them.
49
isatty = getattr(f, 'isatty', None)
54
# The following case also handles Win32 - on that platform $TERM is
55
# typically never set, so the case None is treated as a smart terminal,
56
# not dumb. <https://bugs.launchpad.net/bugs/334808> win32 files do have
57
# isatty methods that return true.
58
if os.environ.get('TERM') == 'dumb':
59
# e.g. emacs compile window
64
class ProgressTask(object):
65
"""Model component of a progress indicator.
67
Most code that needs to indicate progress should update one of these,
68
and it will in turn update the display, if one is present.
70
Code updating the task may also set fields as hints about how to display
71
it: show_pct, show_spinner, show_eta, show_count, show_bar. UIs
72
will not necessarily respect all these fields.
74
:ivar update_latency: The interval (in seconds) at which the PB should be
75
updated. Setting this to zero suggests every update should be shown
78
:ivar show_transport_activity: If true (default), transport activity
79
will be shown when this task is drawn. Disable it if you're sure
80
that only irrelevant or uninteresting transport activity can occur
84
def __init__(self, parent_task=None, ui_factory=None, progress_view=None):
85
"""Construct a new progress task.
87
:param parent_task: Enclosing ProgressTask or None.
89
:param progress_view: ProgressView to display this ProgressTask.
91
:param ui_factory: The UI factory that will display updates;
92
deprecated in favor of passing progress_view directly.
94
Normally you should not call this directly but rather through
95
`ui_factory.nested_progress_bar`.
97
self._parent_task = parent_task
100
self.current_cnt = None
102
# TODO: deprecate passing ui_factory
103
self.ui_factory = ui_factory
104
self.progress_view = progress_view
105
self.show_pct = False
106
self.show_spinner = True
107
self.show_eta = False,
108
self.show_count = True
110
self.update_latency = 0.1
111
self.show_transport_activity = True
114
return '%s(%r/%r, msg=%r)' % (
115
self.__class__.__name__,
120
def update(self, msg, current_cnt=None, total_cnt=None):
122
self.current_cnt = current_cnt
124
self.total_cnt = total_cnt
125
if self.progress_view:
126
self.progress_view.show_progress(self)
128
self.ui_factory._progress_updated(self)
131
self.update(self.msg)
134
if self.progress_view:
135
self.progress_view.task_finished(self)
137
self.ui_factory._progress_finished(self)
139
def make_sub_task(self):
140
return ProgressTask(self, ui_factory=self.ui_factory,
141
progress_view=self.progress_view)
143
def _overall_completion_fraction(self, child_fraction=0.0):
144
"""Return fractional completion of this task and its parents
146
Returns None if no completion can be computed."""
147
if self.current_cnt is not None and self.total_cnt:
148
own_fraction = (float(self.current_cnt) + child_fraction) / self.total_cnt
150
# if this task has no estimation, it just passes on directly
151
# whatever the child has measured...
152
own_fraction = child_fraction
153
if self._parent_task is None:
156
if own_fraction is None:
158
return self._parent_task._overall_completion_fraction(own_fraction)
160
@deprecated_method(deprecated_in((2, 1, 0)))
161
def note(self, fmt_string, *args):
162
"""Record a note without disrupting the progress bar.
164
Deprecated: use ui_factory.note() instead or bzrlib.trace. Note that
165
ui_factory.note takes just one string as the argument, not a format
166
string and arguments.
169
self.ui_factory.note(fmt_string % args)
171
self.ui_factory.note(fmt_string)
174
# TODO: deprecate this method; the model object shouldn't be concerned
175
# with whether it's shown or not. Most callers use this because they
176
# want to write some different non-progress output to the screen, but
177
# they should probably instead use a stream that's synchronized with
178
# the progress output. It may be there is a model-level use for
179
# saying "this task's not active at the moment" but I don't see it. --
181
if self.progress_view:
182
self.progress_view.clear()
184
self.ui_factory.clear_term()
187
@deprecated_function(deprecated_in((1, 16, 0)))
188
def ProgressBar(to_file=None, **kwargs):
189
"""Construct a progress bar.
191
Deprecated; ask the ui_factory for a progress task instead.
195
requested_bar_type = os.environ.get('BZR_PROGRESS_BAR')
196
# An value of '' or not set reverts to standard processing
197
if requested_bar_type in (None, ''):
198
if _supports_progress(to_file):
199
return TTYProgressBar(to_file=to_file, **kwargs)
201
return DummyProgress(to_file=to_file, **kwargs)
203
# Minor sanitation to prevent spurious errors
204
requested_bar_type = requested_bar_type.lower().strip()
205
# TODO: jam 20060710 Arguably we shouldn't raise an exception
206
# but should instead just disable progress bars if we
207
# don't recognize the type
208
if requested_bar_type not in _progress_bar_types:
209
raise errors.InvalidProgressBarType(requested_bar_type,
210
_progress_bar_types.keys())
211
return _progress_bar_types[requested_bar_type](to_file=to_file, **kwargs)
214
# NOTE: This is also deprecated; you should provide a ProgressView instead.
215
class _BaseProgressBar(object):
224
to_messages_file=None,
226
object.__init__(self)
229
if to_messages_file is None:
230
to_messages_file = sys.stdout
231
self.to_file = to_file
232
self.to_messages_file = to_messages_file
235
self.last_total = None
236
self.show_pct = show_pct
237
self.show_spinner = show_spinner
238
self.show_eta = show_eta
239
self.show_bar = show_bar
240
self.show_count = show_count
243
self.MIN_PAUSE = 0.1 # seconds
246
self.start_time = now
247
# next update should not throttle
248
self.last_update = now - self.MIN_PAUSE - 1
251
"""Return this bar to its progress stack."""
253
self._stack.return_pb(self)
255
def note(self, fmt_string, *args, **kwargs):
256
"""Record a note without disrupting the progress bar."""
258
self.to_messages_file.write(fmt_string % args)
259
self.to_messages_file.write('\n')
261
@deprecated_function(deprecated_in((1, 16, 0)))
262
def child_progress(self, **kwargs):
263
return ChildProgress(**kwargs)
266
class DummyProgress(_BaseProgressBar):
267
"""Progress-bar standin that does nothing.
269
This can be used as the default argument for methods that
270
take an optional progress indicator."""
275
def update(self, msg=None, current=None, total=None):
278
def child_update(self, message, current, total):
284
def note(self, fmt_string, *args, **kwargs):
285
"""See _BaseProgressBar.note()."""
287
def child_progress(self, **kwargs):
288
return DummyProgress(**kwargs)
291
class DotsProgressBar(_BaseProgressBar):
293
@deprecated_function(deprecated_in((1, 16, 0)))
294
def __init__(self, **kwargs):
295
_BaseProgressBar.__init__(self, **kwargs)
302
def update(self, msg=None, current_cnt=None, total_cnt=None):
303
if msg and msg != self.last_msg:
305
self.to_file.write('\n')
306
self.to_file.write(msg + ': ')
309
self.to_file.write('.')
313
self.to_file.write('\n')
316
def child_update(self, message, current, total):
320
class TTYProgressBar(_BaseProgressBar):
321
"""Progress bar display object.
323
Several options are available to control the display. These can
324
be passed as parameters to the constructor or assigned at any time:
327
Show percentage complete.
329
Show rotating baton. This ticks over on every update even
330
if the values don't change.
332
Show predicted time-to-completion.
336
Show numerical counts.
338
The output file should be in line-buffered or unbuffered mode.
342
@deprecated_function(deprecated_in((1, 16, 0)))
343
def __init__(self, **kwargs):
344
from bzrlib.osutils import terminal_width
345
_BaseProgressBar.__init__(self, **kwargs)
347
self.width = terminal_width()
348
self.last_updates = []
349
self._max_last_updates = 10
350
self.child_fraction = 0
351
self._have_output = False
353
def throttle(self, old_msg):
354
"""Return True if the bar was updated too recently"""
355
# time.time consistently takes 40/4000 ms = 0.01 ms.
356
# time.clock() is faster, but gives us CPU time, not wall-clock time
358
if self.start_time is not None and (now - self.start_time) < 1:
360
if old_msg != self.last_msg:
362
interval = now - self.last_update
364
if interval < self.MIN_PAUSE:
367
self.last_updates.append(now - self.last_update)
368
# Don't let the queue grow without bound
369
self.last_updates = self.last_updates[-self._max_last_updates:]
370
self.last_update = now
374
self.update(self.last_msg, self.last_cnt, self.last_total,
377
def child_update(self, message, current, total):
378
if current is not None and total != 0:
379
child_fraction = float(current) / total
380
if self.last_cnt is None:
382
elif self.last_cnt + child_fraction <= self.last_total:
383
self.child_fraction = child_fraction
384
if self.last_msg is None:
388
def update(self, msg, current_cnt=None, total_cnt=None,
390
"""Update and redraw progress bar.
395
if total_cnt is None:
396
total_cnt = self.last_total
401
if current_cnt > total_cnt:
402
total_cnt = current_cnt
404
## # optional corner case optimisation
405
## # currently does not seem to fire so costs more than saved.
406
## # trivial optimal case:
407
## # NB if callers are doing a clear and restore with
408
## # the saved values, this will prevent that:
409
## # in that case add a restore method that calls
410
## # _do_update or some such
411
## if (self.last_msg == msg and
412
## self.last_cnt == current_cnt and
413
## self.last_total == total_cnt and
414
## self.child_fraction == child_fraction):
420
old_msg = self.last_msg
421
# save these for the tick() function
423
self.last_cnt = current_cnt
424
self.last_total = total_cnt
425
self.child_fraction = child_fraction
427
# each function call takes 20ms/4000 = 0.005 ms,
428
# but multiple that by 4000 calls -> starts to cost.
429
# so anything to make this function call faster
430
# will improve base 'diff' time by up to 0.1 seconds.
431
if self.throttle(old_msg):
434
if self.show_eta and self.start_time and self.last_total:
435
eta = get_eta(self.start_time, self.last_cnt + self.child_fraction,
436
self.last_total, last_updates = self.last_updates)
437
eta_str = " " + str_tdelta(eta)
441
if self.show_spinner:
442
spin_str = self.SPIN_CHARS[self.spin_pos % 4] + ' '
446
# always update this; it's also used for the bar
449
if self.show_pct and self.last_total and self.last_cnt:
450
pct = 100.0 * ((self.last_cnt + self.child_fraction) / self.last_total)
451
pct_str = ' (%5.1f%%)' % pct
455
if not self.show_count:
457
elif self.last_cnt is None:
459
elif self.last_total is None:
460
count_str = ' %i' % (self.last_cnt)
462
# make both fields the same size
463
t = '%i' % (self.last_total)
464
c = '%*i' % (len(t), self.last_cnt)
465
count_str = ' ' + c + '/' + t
468
# progress bar, if present, soaks up all remaining space
469
cols = self.width - 1 - len(self.last_msg) - len(spin_str) - len(pct_str) \
470
- len(eta_str) - len(count_str) - 3
473
# number of markers highlighted in bar
474
markers = int(round(float(cols) *
475
(self.last_cnt + self.child_fraction) / self.last_total))
476
bar_str = '[' + ('=' * markers).ljust(cols) + '] '
478
# don't know total, so can't show completion.
479
# so just show an expanded spinning thingy
480
m = self.spin_pos % cols
481
ms = (' ' * m + '*').ljust(cols)
483
bar_str = '[' + ms + '] '
489
m = spin_str + bar_str + self.last_msg + count_str \
491
self.to_file.write('\r%-*.*s' % (self.width - 1, self.width - 1, m))
492
self._have_output = True
493
#self.to_file.flush()
496
if self._have_output:
497
self.to_file.write('\r%s\r' % (' ' * (self.width - 1)))
498
self._have_output = False
499
#self.to_file.flush()
504
class ChildProgress(_BaseProgressBar):
505
"""A progress indicator that pushes its data to the parent"""
507
@deprecated_function(deprecated_in((1, 16, 0)))
508
def __init__(self, _stack, **kwargs):
509
_BaseProgressBar.__init__(self, _stack=_stack, **kwargs)
510
self.parent = _stack.top()
513
self.child_fraction = 0
516
def update(self, msg, current_cnt=None, total_cnt=None):
517
self.current = current_cnt
518
if total_cnt is not None:
519
self.total = total_cnt
521
self.child_fraction = 0
524
def child_update(self, message, current, total):
525
if current is None or total == 0:
526
self.child_fraction = 0
528
self.child_fraction = float(current) / total
532
if self.current is None:
535
count = self.current+self.child_fraction
536
if count > self.total:
538
mutter('clamping count of %d to %d' % (count, self.total))
540
self.parent.child_update(self.message, count, self.total)
545
def note(self, *args, **kwargs):
546
self.parent.note(*args, **kwargs)
549
def str_tdelta(delt):
552
delt = int(round(delt))
553
return '%d:%02d:%02d' % (delt/3600,
558
def get_eta(start_time, current, total, enough_samples=3, last_updates=None, n_recent=10):
559
if start_time is None:
565
if current < enough_samples:
571
elapsed = time.time() - start_time
573
if elapsed < 2.0: # not enough time to estimate
576
total_duration = float(elapsed) * float(total) / float(current)
578
if last_updates and len(last_updates) >= n_recent:
579
avg = sum(last_updates) / float(len(last_updates))
580
time_left = avg * (total - current)
582
old_time_left = total_duration - elapsed
584
# We could return the average, or some other value here
585
return (time_left + old_time_left) / 2
587
return total_duration - elapsed
590
class ProgressPhase(object):
591
"""Update progress object with the current phase"""
592
def __init__(self, message, total, pb):
593
object.__init__(self)
595
self.message = message
597
self.cur_phase = None
599
def next_phase(self):
600
if self.cur_phase is None:
604
self.pb.update(self.message, self.cur_phase, self.total)
607
_progress_bar_types = {}
608
_progress_bar_types['dummy'] = DummyProgress
609
_progress_bar_types['none'] = DummyProgress
610
_progress_bar_types['tty'] = TTYProgressBar
611
_progress_bar_types['dots'] = DotsProgressBar
added
removed
bzrlib/progress.py
