1
# Copyright (C) 2005 Aaron Bentley <aaron.bentley@utoronto.ca>
2
# Copyright (C) 2005, 2006 Canonical <canonical.com>
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; either version 2 of the License, or
7
# (at your option) any later version.
9
# This program is distributed in the hope that it will be useful,
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
# GNU General Public License for more details.
14
# You should have received a copy of the GNU General Public License
15
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
"""Simple text-mode progress indicator.
21
To display an indicator, create a ProgressBar object. Call it,
22
passing Progress objects indicating the current state. When done,
25
Progress is suppressed when output is not sent to a terminal, so as
26
not to clutter log files.
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.
29
# TODO: should be a global option e.g. --silent that disables progress
30
# indicators, preferably without needing to adjust all code that
31
# potentially calls them.
33
# TODO: If not on a tty perhaps just print '......' for the benefit of IDEs, etc
35
# TODO: Optionally show elapsed time instead/as well as ETA; nicer
36
# when the rate is unpredictable
42
from collections import deque
45
import bzrlib.errors as errors
46
from bzrlib.trace import mutter
33
from bzrlib.trace import mutter
34
from bzrlib.symbol_versioning import (
49
40
def _supports_progress(f):
50
if not hasattr(f, 'isatty'):
41
"""Detect if we can use pretty progress bars on file F.
43
If this returns true we expect that a human may be looking at that
44
output, and that we can repaint a line to update it.
46
This doesn't check the policy for whether we *should* use them.
48
isatty = getattr(f, 'isatty', None)
53
# The following case also handles Win32 - on that platform $TERM is
54
# typically never set, so the case None is treated as a smart terminal,
55
# not dumb. <https://bugs.launchpad.net/bugs/334808> win32 files do have
56
# isatty methods that return true.
54
57
if os.environ.get('TERM') == 'dumb':
55
58
# e.g. emacs compile window
61
def ProgressBar(to_file=sys.stderr, **kwargs):
62
"""Abstract factory"""
63
if _supports_progress(to_file):
64
return TTYProgressBar(to_file=to_file, **kwargs)
63
class ProgressTask(object):
64
"""Model component of a progress indicator.
66
Most code that needs to indicate progress should update one of these,
67
and it will in turn update the display, if one is present.
69
Code updating the task may also set fields as hints about how to display
70
it: show_pct, show_spinner, show_eta, show_count, show_bar. UIs
71
will not necessarily respect all these fields.
73
:ivar update_latency: The interval (in seconds) at which the PB should be
74
updated. Setting this to zero suggests every update should be shown
77
:ivar show_transport_activity: If true (default), transport activity
78
will be shown when this task is drawn. Disable it if you're sure
79
that only irrelevant or uninteresting transport activity can occur
83
def __init__(self, parent_task=None, ui_factory=None, progress_view=None):
84
"""Construct a new progress task.
86
:param parent_task: Enclosing ProgressTask or None.
88
:param progress_view: ProgressView to display this ProgressTask.
90
:param ui_factory: The UI factory that will display updates;
91
deprecated in favor of passing progress_view directly.
93
Normally you should not call this directly but rather through
94
`ui_factory.nested_progress_bar`.
96
self._parent_task = parent_task
99
self.current_cnt = None
101
# TODO: deprecate passing ui_factory
102
self.ui_factory = ui_factory
103
self.progress_view = progress_view
104
self.show_pct = False
105
self.show_spinner = True
106
self.show_eta = False,
107
self.show_count = True
109
self.update_latency = 0.1
110
self.show_transport_activity = True
113
return '%s(%r/%r, msg=%r)' % (
114
self.__class__.__name__,
119
def update(self, msg, current_cnt=None, total_cnt=None):
121
self.current_cnt = current_cnt
123
self.total_cnt = total_cnt
124
if self.progress_view:
125
self.progress_view.show_progress(self)
127
self.ui_factory._progress_updated(self)
130
self.update(self.msg)
133
if self.progress_view:
134
self.progress_view.task_finished(self)
136
self.ui_factory._progress_finished(self)
138
def make_sub_task(self):
139
return ProgressTask(self, ui_factory=self.ui_factory,
140
progress_view=self.progress_view)
142
def _overall_completion_fraction(self, child_fraction=0.0):
143
"""Return fractional completion of this task and its parents
145
Returns None if no completion can be computed."""
146
if self.current_cnt is not None and self.total_cnt:
147
own_fraction = (float(self.current_cnt) + child_fraction) / self.total_cnt
149
# if this task has no estimation, it just passes on directly
150
# whatever the child has measured...
151
own_fraction = child_fraction
152
if self._parent_task is None:
155
if own_fraction is None:
157
return self._parent_task._overall_completion_fraction(own_fraction)
159
def note(self, fmt_string, *args):
160
"""Record a note without disrupting the progress bar."""
161
# XXX: shouldn't be here; put it in mutter or the ui instead
163
self.ui_factory.note(fmt_string % args)
165
self.ui_factory.note(fmt_string)
168
# XXX: shouldn't be here; put it in mutter or the ui instead
169
if self.progress_view:
170
self.progress_view.clear()
172
self.ui_factory.clear_term()
175
@deprecated_function(deprecated_in((1, 16, 0)))
176
def ProgressBar(to_file=None, **kwargs):
177
"""Construct a progress bar.
179
Deprecated; ask the ui_factory for a progress task instead.
183
requested_bar_type = os.environ.get('BZR_PROGRESS_BAR')
184
# An value of '' or not set reverts to standard processing
185
if requested_bar_type in (None, ''):
186
if _supports_progress(to_file):
187
return TTYProgressBar(to_file=to_file, **kwargs)
189
return DummyProgress(to_file=to_file, **kwargs)
66
return DotsProgressBar(to_file=to_file, **kwargs)
69
class ProgressBarStack(object):
70
"""A stack of progress bars."""
79
to_messages_file=sys.stdout,
81
"""Setup the stack with the parameters the progress bars should have."""
82
self._to_file = to_file
83
self._show_pct = show_pct
84
self._show_spinner = show_spinner
85
self._show_eta = show_eta
86
self._show_bar = show_bar
87
self._show_count = show_count
88
self._to_messages_file = to_messages_file
90
self._klass = klass or TTYProgressBar
93
if len(self._stack) != 0:
94
return self._stack[-1]
99
if len(self._stack) != 0:
100
return self._stack[0]
104
def get_nested(self):
105
"""Return a nested progress bar."""
106
if len(self._stack) == 0:
109
func = self.top().child_progress
110
new_bar = func(to_file=self._to_file,
111
show_pct=self._show_pct,
112
show_spinner=self._show_spinner,
113
show_eta=self._show_eta,
114
show_bar=self._show_bar,
115
show_count=self._show_count,
116
to_messages_file=self._to_messages_file,
118
self._stack.append(new_bar)
121
def return_pb(self, bar):
122
"""Return bar after its been used."""
123
if bar is not self._stack[-1]:
124
raise errors.MissingProgressBarFinish()
191
# Minor sanitation to prevent spurious errors
192
requested_bar_type = requested_bar_type.lower().strip()
193
# TODO: jam 20060710 Arguably we shouldn't raise an exception
194
# but should instead just disable progress bars if we
195
# don't recognize the type
196
if requested_bar_type not in _progress_bar_types:
197
raise errors.InvalidProgressBarType(requested_bar_type,
198
_progress_bar_types.keys())
199
return _progress_bar_types[requested_bar_type](to_file=to_file, **kwargs)
202
# NOTE: This is also deprecated; you should provide a ProgressView instead.
128
203
class _BaseProgressBar(object):
130
205
def __init__(self,
133
208
show_spinner=False,
137
to_messages_file=sys.stdout,
212
to_messages_file=None,
139
214
object.__init__(self)
217
if to_messages_file is None:
218
to_messages_file = sys.stdout
140
219
self.to_file = to_file
141
220
self.to_messages_file = to_messages_file
142
221
self.last_msg = None
added
removed
bzrlib/progress.py
