13
13
# You should have received a copy of the GNU General Public License
14
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
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19
"""Text UI, write output to the console.
28
26
from bzrlib.lazy_import import lazy_import
29
27
lazy_import(globals(), """
30
30
from bzrlib import (
40
from bzrlib.ui import (
46
class TextUIFactory(UIFactory):
38
from bzrlib.ui import CLIUIFactory
41
class TextUIFactory(CLIUIFactory):
47
42
"""A UI factory for Text user interefaces."""
53
49
"""Create a TextUIFactory.
51
:param bar_type: The type of progress bar to create. It defaults to
52
letting the bzrlib.progress.ProgressBar factory auto
55
super(TextUIFactory, self).__init__()
56
# TODO: there's no good reason not to pass all three streams, maybe we
57
# should deprecate the default values...
55
super(TextUIFactory, self).__init__(stdin=stdin,
56
stdout=stdout, stderr=stderr)
58
symbol_versioning.warn(symbol_versioning.deprecated_in((1, 11, 0))
59
% "bar_type parameter")
61
60
# paints progress, network activity, etc
62
self._progress_view = self.make_progress_view()
64
def be_quiet(self, state):
65
if state and not self._quiet:
67
UIFactory.be_quiet(self, state)
68
self._progress_view = self.make_progress_view()
61
self._progress_view = TextProgressView(self.stderr)
63
def prompt(self, prompt):
64
"""Emit prompt on the CLI."""
65
self.stdout.write(prompt)
70
67
def clear_term(self):
71
68
"""Prepare the terminal for output.
78
75
# to clear it. We might need to separately check for the case of
79
76
self._progress_view.clear()
81
def get_boolean(self, prompt):
83
self.prompt(prompt + "? [y/n]: ")
84
line = self.stdin.readline().lower()
85
if line in ('y\n', 'yes\n'):
87
elif line in ('n\n', 'no\n'):
89
elif line in ('', None):
90
# end-of-file; possibly should raise an error here instead
93
def get_integer(self, prompt):
96
line = self.stdin.readline()
102
def get_non_echoed_password(self):
103
isatty = getattr(self.stdin, 'isatty', None)
104
if isatty is not None and isatty():
105
# getpass() ensure the password is not echoed and other
106
# cross-platform niceties
107
password = getpass.getpass('')
109
# echo doesn't make sense without a terminal
110
password = self.stdin.readline()
113
elif password[-1] == '\n':
114
password = password[:-1]
117
def get_password(self, prompt='', **kwargs):
118
"""Prompt the user for a password.
120
:param prompt: The prompt to present the user
121
:param kwargs: Arguments which will be expanded into the prompt.
122
This lets front ends display different things if
124
:return: The password string, return None if the user
125
canceled the request.
128
self.prompt(prompt, **kwargs)
129
# There's currently no way to say 'i decline to enter a password'
130
# as opposed to 'my password is empty' -- does it matter?
131
return self.get_non_echoed_password()
133
def get_username(self, prompt, **kwargs):
134
"""Prompt the user for a username.
136
:param prompt: The prompt to present the user
137
:param kwargs: Arguments which will be expanded into the prompt.
138
This lets front ends display different things if
140
:return: The username string, return None if the user
141
canceled the request.
144
self.prompt(prompt, **kwargs)
145
username = self.stdin.readline()
148
elif username[-1] == '\n':
149
username = username[:-1]
152
def make_progress_view(self):
153
"""Construct and return a new ProgressView subclass for this UI.
155
# with --quiet, never any progress view
156
# <https://bugs.edge.launchpad.net/bzr/+bug/320035>. Otherwise if the
157
# user specifically requests either text or no progress bars, always
158
# do that. otherwise, guess based on $TERM and tty presence.
160
return NullProgressView()
161
elif os.environ.get('BZR_PROGRESS_BAR') == 'text':
162
return TextProgressView(self.stderr)
163
elif os.environ.get('BZR_PROGRESS_BAR') == 'none':
164
return NullProgressView()
165
elif progress._supports_progress(self.stderr):
166
return TextProgressView(self.stderr)
168
return NullProgressView()
170
def _make_output_stream_explicit(self, encoding, encoding_type):
171
if encoding_type == 'exact':
172
# force sys.stdout to be binary stream on win32;
173
# NB: this leaves the file set in that mode; may cause problems if
174
# one process tries to do binary and then text output
175
if sys.platform == 'win32':
176
fileno = getattr(self.stdout, 'fileno', None)
179
msvcrt.setmode(fileno(), os.O_BINARY)
180
return TextUIOutputStream(self, self.stdout)
182
encoded_stdout = codecs.getwriter(encoding)(self.stdout,
183
errors=encoding_type)
184
# For whatever reason codecs.getwriter() does not advertise its encoding
185
# it just returns the encoding of the wrapped file, which is completely
186
# bogus. So set the attribute, so we can find the correct encoding later.
187
encoded_stdout.encoding = encoding
188
return TextUIOutputStream(self, encoded_stdout)
190
78
def note(self, msg):
191
79
"""Write an already-formatted message, clearing the progress bar if necessary."""
193
81
self.stdout.write(msg + '\n')
195
def prompt(self, prompt, **kwargs):
196
"""Emit prompt on the CLI.
198
:param kwargs: Dictionary of arguments to insert into the prompt,
199
to allow UIs to reformat the prompt.
202
# See <https://launchpad.net/bugs/365891>
203
prompt = prompt % kwargs
204
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
206
self.stderr.write(prompt)
208
83
def report_transport_activity(self, transport, byte_count, direction):
209
84
"""Called by transports as they do IO.
211
86
This may update a progress bar, spinner, or similar display.
212
87
By default it does nothing.
214
self._progress_view.show_transport_activity(transport,
215
direction, byte_count)
217
def log_transport_activity(self, display=False):
218
"""See UIFactory.log_transport_activity()"""
219
log = getattr(self._progress_view, 'log_transport_activity', None)
223
def show_error(self, msg):
225
self.stderr.write("bzr: error: %s\n" % msg)
227
def show_message(self, msg):
230
def show_warning(self, msg):
232
self.stderr.write("bzr: warning: %s\n" % msg)
89
self._progress_view.show_transport_activity(byte_count)
234
91
def _progress_updated(self, task):
235
92
"""A task has been updated and wants to be displayed.
269
122
self._term_file = term_file
270
123
# true when there's output on the screen we may need to clear
271
124
self._have_output = False
125
# XXX: We could listen for SIGWINCH and update the terminal width...
126
self._width = osutils.terminal_width()
272
127
self._last_transport_msg = ''
273
128
self._spin_pos = 0
274
129
# time we last repainted the screen
275
130
self._last_repaint = 0
276
131
# time we last got information about transport activity
277
132
self._transport_update_time = 0
133
self._task_fraction = None
278
134
self._last_task = None
279
135
self._total_byte_count = 0
280
136
self._bytes_since_update = 0
281
self._bytes_by_direction = {'unknown': 0, 'read': 0, 'write': 0}
282
self._first_byte_time = None
284
# force the progress bar to be off, as at the moment it doesn't
285
# correspond reliably to overall command progress
286
self.enable_bar = False
288
138
def _show_line(self, s):
289
# sys.stderr.write("progress %r\n" % s)
290
width = osutils.terminal_width()
291
if width is not None:
292
# we need one extra space for terminals that wrap on last char
294
s = '%-*.*s' % (width, width, s)
295
self._term_file.write('\r' + s + '\r')
140
self._term_file.write('\r%-*.*s\r' % (n, n, s))
298
143
if self._have_output:
302
147
def _render_bar(self):
303
148
# return a string for the progress bar itself
304
if self.enable_bar and (
305
(self._last_task is None) or self._last_task.show_bar):
306
# If there's no task object, we show space for the bar anyhow.
307
# That's because most invocations of bzr will end showing progress
308
# at some point, though perhaps only after doing some initial IO.
309
# It looks better to draw the progress bar initially rather than
310
# to have what looks like an incomplete progress bar.
149
if (self._last_task is not None) and self._last_task.show_bar:
311
150
spin_str = r'/-\|'[self._spin_pos % 4]
312
151
self._spin_pos += 1
152
f = self._task_fraction or 0
314
if self._last_task is None:
315
completion_fraction = 0
318
completion_fraction = \
319
self._last_task._overall_completion_fraction() or 0
320
if (completion_fraction < self._fraction and 'progress' in
322
import pdb;pdb.set_trace()
323
self._fraction = completion_fraction
324
markers = int(round(float(cols) * completion_fraction)) - 1
154
# number of markers highlighted in bar
155
markers = int(round(float(cols) * f)) - 1
325
156
bar_str = '[' + ('#' * markers + spin_str).ljust(cols) + '] '
327
158
elif (self._last_task is None) or self._last_task.show_spinner:
328
# The last task wanted just a spinner, no bar
329
159
spin_str = r'/-\|'[self._spin_pos % 4]
330
160
self._spin_pos += 1
331
161
return spin_str + ' '
350
181
m = t.msg + ':' + m
353
def _render_line(self):
354
185
bar_string = self._render_bar()
355
186
if self._last_task:
356
187
task_msg = self._format_task(self._last_task)
359
if self._last_task and not self._last_task.show_transport_activity:
362
trans = self._last_transport_msg
365
return (bar_string + trans + task_msg)
368
s = self._render_line()
190
trans = self._last_transport_msg
191
if trans and task_msg:
369
197
self._show_line(s)
370
198
self._have_output = True
372
200
def show_progress(self, task):
373
"""Called by the task object when it has changed.
375
:param task: The top task object; its parents are also included
378
must_update = task is not self._last_task
379
201
self._last_task = task
380
202
now = time.time()
381
if (not must_update) and (now < self._last_repaint + task.update_latency):
203
if now < self._last_repaint + 0.1:
383
if now > self._transport_update_time + 10:
205
if now > self._transport_update_time + 5:
384
206
# no recent activity; expire it
385
207
self._last_transport_msg = ''
386
208
self._last_repaint = now
389
def show_transport_activity(self, transport, direction, byte_count):
390
"""Called by transports via the ui_factory, as they do IO.
211
def show_transport_activity(self, byte_count):
212
"""Called by transports as they do IO.
392
214
This may update a progress bar, spinner, or similar display.
393
215
By default it does nothing.
395
# XXX: there should be a transport activity model, and that too should
396
# be seen by the progress view, rather than being poked in here.
217
# XXX: Probably there should be a transport activity model, and that
218
# too should be seen by the progress view, rather than being poked in
397
220
self._total_byte_count += byte_count
398
221
self._bytes_since_update += byte_count
399
if self._first_byte_time is None:
400
# Note that this isn't great, as technically it should be the time
401
# when the bytes started transferring, not when they completed.
402
# However, we usually start with a small request anyway.
403
self._first_byte_time = time.time()
404
if direction in self._bytes_by_direction:
405
self._bytes_by_direction[direction] += byte_count
407
self._bytes_by_direction['unknown'] += byte_count
408
if 'no_activity' in debug.debug_flags:
409
# Can be used as a workaround if
410
# <https://launchpad.net/bugs/321935> reappears and transport
411
# activity is cluttering other output. However, thanks to
412
# TextUIOutputStream this shouldn't be a problem any more.
414
222
now = time.time()
415
if self._total_byte_count < 2000:
416
# a little resistance at first, so it doesn't stay stuck at 0
417
# while connecting...
419
223
if self._transport_update_time is None:
420
224
self._transport_update_time = now
421
225
elif now >= (self._transport_update_time + 0.5):
422
226
# guard against clock stepping backwards, and don't update too
424
rate = (self._bytes_since_update
425
/ (now - self._transport_update_time))
426
# using base-10 units (see HACKING.txt).
427
msg = ("%6dkB %5dkB/s" %
428
(self._total_byte_count / 1000, int(rate) / 1000,))
228
rate = self._bytes_since_update / (now - self._transport_update_time)
229
msg = ("%6dkB @ %4dkB/s" %
230
(self._total_byte_count>>10, int(rate)>>10,))
429
231
self._transport_update_time = now
430
232
self._last_repaint = now
431
233
self._bytes_since_update = 0
432
234
self._last_transport_msg = msg
435
def _format_bytes_by_direction(self):
436
if self._first_byte_time is None:
439
transfer_time = time.time() - self._first_byte_time
440
if transfer_time < 0.001:
441
transfer_time = 0.001
442
bps = self._total_byte_count / transfer_time
444
# using base-10 units (see HACKING.txt).
445
msg = ('Transferred: %.0fkB'
446
' (%.1fkB/s r:%.0fkB w:%.0fkB'
447
% (self._total_byte_count / 1000.,
449
self._bytes_by_direction['read'] / 1000.,
450
self._bytes_by_direction['write'] / 1000.,
452
if self._bytes_by_direction['unknown'] > 0:
453
msg += ' u:%.0fkB)' % (
454
self._bytes_by_direction['unknown'] / 1000.
460
def log_transport_activity(self, display=False):
461
msg = self._format_bytes_by_direction()
463
if display and self._total_byte_count > 0:
465
self._term_file.write(msg + '\n')
468
class TextUIOutputStream(object):
469
"""Decorates an output stream so that the terminal is cleared before writing.
471
This is supposed to ensure that the progress bar does not conflict with bulk
474
# XXX: this does not handle the case of writing part of a line, then doing
475
# progress bar output: the progress bar will probably write over it.
476
# one option is just to buffer that text until we have a full line;
477
# another is to save and restore it
479
# XXX: might need to wrap more methods
481
def __init__(self, ui_factory, wrapped_stream):
482
self.ui_factory = ui_factory
483
self.wrapped_stream = wrapped_stream
484
# this does no transcoding, but it must expose the underlying encoding
485
# because some callers need to know what can be written - see for
486
# example unescape_for_display.
487
self.encoding = getattr(wrapped_stream, 'encoding', None)
490
self.ui_factory.clear_term()
491
self.wrapped_stream.flush()
493
def write(self, to_write):
494
self.ui_factory.clear_term()
495
self.wrapped_stream.write(to_write)
497
def writelines(self, lines):
498
self.ui_factory.clear_term()
499
self.wrapped_stream.writelines(lines)
added
removed
bzrlib/ui/text.py
