28
42
Exceptions are reported in a brief form to stderr so as not to look scary.
29
43
BzrErrors are required to be able to format themselves into a properly
30
explanatory message. This is not true for builtin excexceptions such as
44
explanatory message. This is not true for builtin exceptions such as
31
45
KeyError, which typically just str to "0". They're printed in a different
35
# TODO: in debug mode, stderr should get full tracebacks and also
36
# debug messages. (Is this really needed?)
38
49
# FIXME: Unfortunately it turns out that python's logging module
39
50
# is quite expensive, even when the message is not printed by any handlers.
40
51
# We should perhaps change back to just simply doing it here.
53
# On the other hand, as of 1.2 we generally only call the mutter() statement
54
# if (according to debug_flags) we actually intend to write it. So the
55
# increased cost of logging.py is not so bad, and we could standardize on
65
from bzrlib.lazy_import import lazy_import
66
lazy_import(globals(), """
67
from cStringIO import StringIO
48
from bzrlib.errors import BzrError, BzrNewError
52
_stderr_handler = None
75
lazy_import(globals(), """
86
# global verbosity for bzrlib; controls the log level for stderr; 0=normal; <0
87
# is quiet; >0 is verbose.
90
# File-like object where mutter/debug output is currently sent. Can be
91
# changed by _push_log_file etc. This is directly manipulated by some
92
# external code; maybe there should be functions to do that more precisely
93
# than push/pop_log_file.
58
class QuietFormatter(logging.Formatter):
59
"""Formatter that supresses the details of errors.
61
This is used by default on stderr so as not to scare the user.
63
# At first I tried overriding formatException to suppress the
64
# exception details, but that has global effect: no loggers
65
# can get the exception details is we suppress them here.
67
def format(self, record):
68
if record.levelno >= logging.WARNING:
69
s = 'bzr: ' + record.levelname + ': '
72
s += record.getMessage()
74
s += '\n' + format_exception_short(record.exc_info)
96
# Absolute path for ~/.bzr.log. Not changed even if the log/trace output is
97
# redirected elsewhere. Used to show the location in --version.
98
_bzr_log_filename = None
100
# The time the first message was written to the trace file, so that we can
101
# show relative times since startup.
102
_bzr_log_start_time = bzrlib._start_time
105
# held in a global for quick reference
106
_bzr_logger = logging.getLogger('bzr')
109
def note(*args, **kwargs):
110
# FIXME note always emits utf-8, regardless of the terminal encoding
112
# FIXME: clearing the ui and then going through the abstract logging
113
# framework is whack; we should probably have a logging Handler that
114
# deals with terminal output if needed.
116
bzrlib.ui.ui_factory.clear_term()
117
_bzr_logger.info(*args, **kwargs)
120
def warning(*args, **kwargs):
122
bzrlib.ui.ui_factory.clear_term()
123
_bzr_logger.warning(*args, **kwargs)
77
126
# configure convenient aliases for output routines
79
_bzr_logger = logging.getLogger('bzr')
81
info = note = _bzr_logger.info
82
warning = _bzr_logger.warning
128
# TODO: deprecate them, have one name for each.
83
130
log_error = _bzr_logger.error
84
131
error = _bzr_logger.error
87
134
def mutter(fmt, *args):
88
135
if _trace_file is None:
90
if hasattr(_trace_file, 'closed') and _trace_file.closed:
137
if (getattr(_trace_file, 'closed', None) is not None) and _trace_file.closed:
140
if isinstance(fmt, unicode):
141
fmt = fmt.encode('utf8')
144
# It seems that if we do ascii % (unicode, ascii) we can
145
# get a unicode cannot encode ascii error, so make sure that "fmt"
146
# is a unicode string
149
if isinstance(arg, unicode):
150
arg = arg.encode('utf8')
151
real_args.append(arg)
152
out = fmt % tuple(real_args)
155
timestamp = '%0.3f ' % (time.time() - _bzr_log_start_time,)
156
out = timestamp + out + '\n'
97
157
_trace_file.write(out)
158
# no need to flush here, the trace file is now linebuffered when it's
162
def mutter_callsite(stacklevel, fmt, *args):
163
"""Perform a mutter of fmt and args, logging the call trace.
165
:param stacklevel: The number of frames to show. None will show all
167
:param fmt: The format string to pass to mutter.
168
:param args: A list of substitution variables.
171
if stacklevel is None:
174
limit = stacklevel + 1
175
traceback.print_stack(limit=limit, file=outf)
176
formatted_lines = outf.getvalue().splitlines()
177
formatted_stack = '\n'.join(formatted_lines[:-2])
178
mutter(fmt + "\nCalled from:\n%s", *(args + (formatted_stack,)))
101
181
def _rollover_trace_maybe(trace_fname):
105
185
if size <= 4 << 20:
107
187
old_fname = trace_fname + '.old'
108
from osutils import rename
109
rename(trace_fname, old_fname)
188
osutils.rename(trace_fname, old_fname)
114
def open_tracefile(tracefilename='~/.bzr.log'):
115
# Messages are always written to here, so that we have some
116
# information if something goes wrong. In a future version this
117
# file will be removed on successful completion.
118
global _file_handler, _bzr_log_file
121
trace_fname = os.path.join(os.path.expanduser(tracefilename))
122
_rollover_trace_maybe(trace_fname)
193
def _get_bzr_log_filename():
194
bzr_log = os.environ.get('BZR_LOG')
197
home = os.environ.get('BZR_HOME')
199
if sys.platform == 'win32':
200
from bzrlib import win32utils
201
home = win32utils.get_home_location()
203
home = os.path.expanduser('~')
204
return os.path.join(home, '.bzr.log')
208
"""Open the .bzr.log trace file.
210
If the log is more than a particular length, the old file is renamed to
211
.bzr.log.old and a new file is started. Otherwise, we append to the
214
This sets the global _bzr_log_filename.
216
global _bzr_log_filename
217
_bzr_log_filename = _get_bzr_log_filename()
218
_rollover_trace_maybe(_bzr_log_filename)
125
tf = codecs.open(trace_fname, 'at', 'utf8', buffering=LINE_BUFFERED)
128
tf.write("\nthis is a debug log for diagnosing/reporting problems in bzr\n")
129
tf.write("you can delete or truncate this file, or include sections in\n")
130
tf.write("bug reports to bazaar-ng@lists.canonical.com\n\n")
131
_file_handler = logging.StreamHandler(tf)
132
fmt = r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s'
133
datefmt = r'%a %H:%M:%S'
134
_file_handler.setFormatter(logging.Formatter(fmt, datefmt))
135
_file_handler.setLevel(logging.DEBUG)
136
logging.getLogger('').addHandler(_file_handler)
220
bzr_log_file = open(_bzr_log_filename, 'at', 1) # line buffered
221
# bzr_log_file.tell() on windows always return 0 until some writing done
222
bzr_log_file.write('\n')
223
if bzr_log_file.tell() <= 2:
224
bzr_log_file.write("this is a debug log for diagnosing/reporting problems in bzr\n")
225
bzr_log_file.write("you can delete or truncate this file, or include sections in\n")
226
bzr_log_file.write("bug reports to https://bugs.launchpad.net/bzr/+filebug\n\n")
137
228
except IOError, e:
138
229
warning("failed to open trace file: %s" % (e))
141
def log_startup(argv):
142
debug('\n\nbzr %s invoked on python %s (%s)',
144
'.'.join(map(str, sys.version_info)),
146
debug(' arguments: %r', argv)
147
debug(' working dir: %r', os.getcwdu())
150
def log_exception(msg=None):
151
"""Log the last exception to stderr and the trace file.
153
The exception string representation is used as the error
154
summary, unless msg is given.
159
exc_str = format_exception_short(sys.exc_info())
161
log_exception_quietly()
230
# TODO: What should happen if we fail to open the trace file? Maybe the
231
# objects should be pointed at /dev/null or the equivalent? Currently
232
# returns None which will cause failures later.
235
def enable_default_logging():
236
"""Configure default logging: messages to stderr and debug to .bzr.log
238
This should only be called once per process.
240
Non-command-line programs embedding bzrlib do not need to call this. They
241
can instead either pass a file to _push_log_file, or act directly on
242
logging.getLogger("bzr").
244
Output can be redirected away by calling _push_log_file.
246
# create encoded wrapper around stderr
247
bzr_log_file = _open_bzr_log()
248
push_log_file(bzr_log_file,
249
r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s',
250
r'%Y-%m-%d %H:%M:%S')
251
# after hooking output into bzr_log, we also need to attach a stderr
252
# handler, writing only at level info and with encoding
253
writer_factory = codecs.getwriter(osutils.get_terminal_encoding())
254
encoded_stderr = writer_factory(sys.stderr, errors='replace')
255
stderr_handler = logging.StreamHandler(encoded_stderr)
256
stderr_handler.setLevel(logging.INFO)
257
logging.getLogger('bzr').addHandler(stderr_handler)
260
def push_log_file(to_file, log_format=None, date_format=None):
261
"""Intercept log and trace messages and send them to a file.
263
:param to_file: A file-like object to which messages will be sent.
265
:returns: A memento that should be passed to _pop_log_file to restore the
266
previously active logging.
270
new_handler = logging.StreamHandler(to_file)
271
new_handler.setLevel(logging.DEBUG)
272
if log_format is None:
273
log_format = '%(levelname)8s %(message)s'
274
new_handler.setFormatter(logging.Formatter(log_format, date_format))
275
# save and remove any existing log handlers
276
bzr_logger = logging.getLogger('bzr')
277
old_handlers = bzr_logger.handlers[:]
278
del bzr_logger.handlers[:]
279
# set that as the default logger
280
bzr_logger.addHandler(new_handler)
281
bzr_logger.setLevel(logging.DEBUG)
282
# TODO: check if any changes are needed to the root logger
284
# TODO: also probably need to save and restore the level on bzr_logger.
285
# but maybe we can avoid setting the logger level altogether, and just set
286
# the level on the handler?
288
# save the old trace file
289
old_trace_file = _trace_file
290
# send traces to the new one
291
_trace_file = to_file
292
result = new_handler, _trace_file
293
return ('log_memento', old_handlers, new_handler, old_trace_file, to_file)
296
def pop_log_file((magic, old_handlers, new_handler, old_trace_file, new_trace_file)):
297
"""Undo changes to logging/tracing done by _push_log_file.
299
This flushes, but does not close the trace file.
301
Takes the memento returned from _push_log_file."""
303
_trace_file = old_trace_file
304
bzr_logger = logging.getLogger('bzr')
305
bzr_logger.removeHandler(new_handler)
306
# must be closed, otherwise logging will try to close it atexit, and the
307
# file will likely already be closed underneath.
309
bzr_logger.handlers = old_handlers
310
new_trace_file.flush()
313
@symbol_versioning.deprecated_function(symbol_versioning.one_two)
314
def enable_test_log(to_file):
315
"""Redirect logging to a temporary file for a test
317
:returns: an opaque reference that should be passed to disable_test_log
318
after the test completes.
320
return push_log_file(to_file)
323
@symbol_versioning.deprecated_function(symbol_versioning.one_two)
324
def disable_test_log(memento):
325
return pop_log_file(memento)
164
328
def log_exception_quietly():
168
332
interesting to developers but not to users. For example,
169
333
errors loading plugins.
172
debug(traceback.format_exc())
175
def enable_default_logging():
176
"""Configure default logging to stderr and .bzr.log"""
177
# FIXME: if this is run twice, things get confused
178
global _stderr_handler, _file_handler, _trace_file, _bzr_log_file
179
_stderr_handler = logging.StreamHandler()
180
_stderr_handler.setFormatter(QuietFormatter())
181
logging.getLogger('').addHandler(_stderr_handler)
182
_stderr_handler.setLevel(logging.INFO)
183
if not _file_handler:
185
_trace_file = _bzr_log_file
187
_file_handler.setLevel(logging.DEBUG)
188
_bzr_logger.setLevel(logging.DEBUG)
335
mutter(traceback.format_exc())
338
def set_verbosity_level(level):
339
"""Set the verbosity level.
341
:param level: -ve for quiet, 0 for normal, +ve for verbose
343
global _verbosity_level
344
_verbosity_level = level
345
_update_logging_level(level < 0)
348
def get_verbosity_level():
349
"""Get the verbosity level.
351
See set_verbosity_level() for values.
353
return _verbosity_level
192
356
def be_quiet(quiet=True):
193
global _stderr_handler, _stderr_quiet
195
_stderr_quiet = quiet
197
_stderr_handler.setLevel(logging.WARNING)
199
_stderr_handler.setLevel(logging.INFO)
357
# Perhaps this could be deprecated now ...
359
set_verbosity_level(-1)
361
set_verbosity_level(0)
364
def _update_logging_level(quiet=True):
365
"""Hide INFO messages if quiet."""
367
_bzr_logger.setLevel(logging.WARNING)
369
_bzr_logger.setLevel(logging.INFO)
373
"""Is the verbosity level negative?"""
374
return _verbosity_level < 0
378
"""Is the verbosity level positive?"""
379
return _verbosity_level > 0
382
@symbol_versioning.deprecated_function(symbol_versioning.one_two)
207
383
def disable_default_logging():
208
384
"""Turn off default log handlers.
210
This is intended to be used by the test framework, which doesn't
211
want leakage from the code-under-test into the main logs.
214
l = logging.getLogger('')
215
l.removeHandler(_stderr_handler)
217
l.removeHandler(_file_handler)
221
def enable_test_log(to_file):
222
"""Redirect logging to a temporary file for a test"""
223
disable_default_logging()
224
global _test_log_hdlr, _trace_file
225
hdlr = logging.StreamHandler(to_file)
226
hdlr.setLevel(logging.DEBUG)
227
hdlr.setFormatter(logging.Formatter('%(levelname)8s %(message)s'))
228
_bzr_logger.addHandler(hdlr)
229
_bzr_logger.setLevel(logging.DEBUG)
230
_test_log_hdlr = hdlr
231
_trace_file = to_file
234
def disable_test_log():
235
_bzr_logger.removeHandler(_test_log_hdlr)
237
enable_default_logging()
240
def format_exception_short(exc_info):
241
"""Make a short string form of an exception.
243
This is used for display to stderr. It specially handles exception
244
classes without useful string methods.
246
The result has no trailing newline.
248
exc_info - typically an exception from sys.exc_info()
250
exc_type, exc_object, exc_tb = exc_info
253
return '(no exception)'
254
if isinstance(exc_object, (BzrError, BzrNewError)):
255
return str(exc_object)
258
tb = traceback.extract_tb(exc_tb)
259
msg = '%s: %s' % (exc_type, exc_object)
263
msg += '\n at %s line %d\n in %s' % (tb[-1][:3])
265
except Exception, formatting_exc:
266
# XXX: is this really better than just letting it run up?
267
return '(error formatting exception of type %s: %s)' \
268
% (exc_type, formatting_exc)
386
Don't call this method, use _push_log_file and _pop_log_file instead.
391
def report_exception(exc_info, err_file):
392
"""Report an exception to err_file (typically stderr) and to .bzr.log.
394
This will show either a full traceback or a short message as appropriate.
396
:return: The appropriate exit code for this error.
398
exc_type, exc_object, exc_tb = exc_info
399
# Log the full traceback to ~/.bzr.log
400
log_exception_quietly()
401
if (isinstance(exc_object, IOError)
402
and getattr(exc_object, 'errno', None) == errno.EPIPE):
403
err_file.write("bzr: broken pipe\n")
404
return errors.EXIT_ERROR
405
elif isinstance(exc_object, KeyboardInterrupt):
406
err_file.write("bzr: interrupted\n")
407
return errors.EXIT_ERROR
408
elif isinstance(exc_object, ImportError) \
409
and str(exc_object).startswith("No module named "):
410
report_user_error(exc_info, err_file,
411
'You may need to install this Python library separately.')
412
return errors.EXIT_ERROR
413
elif not getattr(exc_object, 'internal_error', True):
414
report_user_error(exc_info, err_file)
415
return errors.EXIT_ERROR
416
elif isinstance(exc_object, (OSError, IOError)):
417
# Might be nice to catch all of these and show them as something more
418
# specific, but there are too many cases at the moment.
419
report_user_error(exc_info, err_file)
420
return errors.EXIT_ERROR
422
report_bug(exc_info, err_file)
423
return errors.EXIT_INTERNAL_ERROR
426
def print_exception(exc_info, err_file):
427
exc_type, exc_object, exc_tb = exc_info
428
err_file.write("bzr: ERROR: %s.%s: %s\n" % (
429
exc_type.__module__, exc_type.__name__, exc_object))
431
traceback.print_exception(exc_type, exc_object, exc_tb, file=err_file)
434
# TODO: Should these be specially encoding the output?
435
def report_user_error(exc_info, err_file, advice=None):
436
"""Report to err_file an error that's not an internal error.
438
These don't get a traceback unless -Derror was given.
440
:param exc_info: 3-tuple from sys.exc_info()
441
:param advice: Extra advice to the user to be printed following the
444
if 'error' in debug.debug_flags:
445
print_exception(exc_info, err_file)
447
err_file.write("bzr: ERROR: %s\n" % (exc_info[1],))
449
err_file.write("%s\n" % (advice,))
452
def report_bug(exc_info, err_file):
453
"""Report an exception that probably indicates a bug in bzr"""
454
print_exception(exc_info, err_file)
456
err_file.write('bzr %s on python %s (%s)\n' % \
458
bzrlib._format_version_tuple(sys.version_info),
460
err_file.write('arguments: %r\n' % sys.argv)
462
'encoding: %r, fsenc: %r, lang: %r\n' % (
463
osutils.get_user_encoding(), sys.getfilesystemencoding(),
464
os.environ.get('LANG')))
465
err_file.write("plugins:\n")
466
for name, a_plugin in sorted(plugin.plugins().items()):
467
err_file.write(" %-20s %s [%s]\n" %
468
(name, a_plugin.path(), a_plugin.__version__))
471
*** Bazaar has encountered an internal error.
472
Please report a bug at https://bugs.launchpad.net/bzr/+filebug
473
including this traceback, and a description of what you
474
were doing when the error occurred.
added
removed
bzrlib/trace.py
