1
# This program is free software; you can redistribute it and/or modify
2
# it under the terms of the GNU General Public License as published by
3
# the Free Software Foundation; either version 2 of the License, or
4
# (at your option) any later version.
6
# This program is distributed in the hope that it will be useful,
7
# but WITHOUT ANY WARRANTY; without even the implied warranty of
8
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9
# GNU General Public License for more details.
11
# You should have received a copy of the GNU General Public License
12
# along with this program; if not, write to the Free Software
13
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
"""Messages and logging for bazaar-ng
18
Messages are sent out through the Python logging library.
20
They can be sent to two places: to stderr, and to ~/.bzr.log.
22
~/.bzr.log gets all messages, and tracebacks of all uncaught
25
Normally stderr only gets messages of level INFO and higher, and gets
26
only a summary of exceptions, not the traceback.
1
# Copyright (C) 2005, Canonical Ltd
3
"""Messages and logging for bazaar-ng.
5
Messages are supplied by callers as a string-formatting template, plus values
6
to be inserted into it. The actual %-formatting is deferred to the log
7
library so that it doesn't need to be done for messages that won't be emitted.
9
Messages are classified by severity levels: critical, error, warning, info,
12
They can be sent to two places: to stderr, and to ~/.bzr.log. For purposes
13
such as running the test suite, they can also be redirected away from both of
14
those two places to another location.
16
~/.bzr.log gets all messages, and full tracebacks for uncaught exceptions.
17
This trace file is always in UTF-8, regardless of the user's default encoding,
18
so that we can always rely on writing any message.
20
Output to stderr depends on the mode chosen by the user. By default, messages
21
of info and above are sent out, which results in progress messages such as the
22
list of files processed by add and commit. In quiet mode, only warnings and
23
above are shown. In debug mode, stderr gets debug messages too.
25
Errors that terminate an operation are generally passed back as exceptions;
26
others may be just emitted as messages.
28
Exceptions are reported in a brief form to stderr so as not to look scary.
29
BzrErrors are required to be able to format themselves into a properly
30
explanatory message. This is not true for builtin excexceptions such as
31
KeyError, which typically just str to "0". They're printed in a different
30
35
# TODO: in debug mode, stderr should get full tracebacks and also
31
36
# debug messages. (Is this really needed?)
33
# TODO: When running the test suites, we should add an additional
34
# logger that sends messages into the test log file.
36
38
# FIXME: Unfortunately it turns out that python's logging module
37
39
# is quite expensive, even when the message is not printed by any handlers.
38
40
# We should perhaps change back to just simply doing it here.
62
70
s = 'bzr: ' + record.levelname + ': '
66
73
s += record.getMessage()
69
##s = textwrap.fill(s)
71
74
if record.exc_info:
72
# give just a summary of the exception, not the whole thing
73
exinfo = traceback.extract_tb(record.exc_info[2])
74
# the format of this string matches one of the REs
76
s += (' at %s line %d, in %s()\n' % exinfo[-1][:3])
77
s += ' see ~/.bzr.log for debug information'
75
s += '\n' + format_exception_short(record.exc_info)
85
78
# configure convenient aliases for output routines
87
80
_bzr_logger = logging.getLogger('bzr')
88
_bzr_logger.setLevel(logging.DEBUG)
90
info = note = _bzr_logger.info
91
warning = _bzr_logger.warning
82
def note(*args, **kwargs):
84
bzrlib.ui.ui_factory.clear_term()
85
_bzr_logger.info(*args, **kwargs)
87
def warning(*args, **kwargs):
89
bzrlib.ui.ui_factory.clear_term()
90
_bzr_logger.warning(*args, **kwargs)
92
93
log_error = _bzr_logger.error
93
94
error = _bzr_logger.error
94
mutter = _bzr_logger.debug
95
debug = _bzr_logger.debug
100
# we do the rollover using this code, rather than the default from python
101
# logging, because we only want to rollover at program startup, not on each
102
# message. maybe that's not a good enough reason.
97
def mutter(fmt, *args):
98
if _trace_file is None:
100
if hasattr(_trace_file, 'closed') and _trace_file.closed:
107
_trace_file.write(out)
104
111
def _rollover_trace_maybe(trace_fname):
108
115
if size <= 4 << 20:
110
117
old_fname = trace_fname + '.old'
112
118
from osutils import rename
113
119
rename(trace_fname, old_fname)
120
124
def open_tracefile(tracefilename='~/.bzr.log'):
121
125
# Messages are always written to here, so that we have some
122
126
# information if something goes wrong. In a future version this
123
127
# file will be removed on successful completion.
128
global _file_handler, _bzr_log_file
125
129
import stat, codecs
127
131
trace_fname = os.path.join(os.path.expanduser(tracefilename))
128
132
_rollover_trace_maybe(trace_fname)
130
# buffering=1 means line buffered
132
tf = codecs.open(trace_fname, 'at', 'utf8', buffering=1)
134
if os.fstat(tf.fileno())[stat.ST_SIZE] == 0:
135
tf = codecs.open(trace_fname, 'at', 'utf8', buffering=LINE_BUFFERED)
135
138
tf.write("\nthis is a debug log for diagnosing/reporting problems in bzr\n")
136
139
tf.write("you can delete or truncate this file, or include sections in\n")
137
140
tf.write("bug reports to bazaar-ng@lists.canonical.com\n\n")
139
141
_file_handler = logging.StreamHandler(tf)
140
142
fmt = r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s'
141
143
datefmt = r'%a %H:%M:%S'
142
144
_file_handler.setFormatter(logging.Formatter(fmt, datefmt))
143
145
_file_handler.setLevel(logging.DEBUG)
144
146
logging.getLogger('').addHandler(_file_handler)
146
147
except IOError, e:
147
148
warning("failed to open trace file: %s" % (e))
150
151
def log_startup(argv):
153
debug('bzr %s invoked on python %s (%s)',
152
debug('\n\nbzr %s invoked on python %s (%s)',
154
153
bzrlib.__version__,
155
154
'.'.join(map(str, sys.version_info)),
158
156
debug(' arguments: %r', argv)
159
157
debug(' working dir: %r', os.getcwdu())
162
160
def log_exception(msg=None):
163
"""Log the last exception into the trace file.
161
"""Log the last exception to stderr and the trace file.
165
163
The exception string representation is used as the error
166
164
summary, unless msg is given.
168
cmd_repr = ' '.join(repr(arg) for arg in sys.argv)
169
cmd_info = '\n command: %s\n pwd: %s' \
170
% (cmd_repr, os.getcwd())
174
if msg and (msg[-1] == '\n'):
176
## msg = "(%s) %s" % (str(type(ei[1])), msg)
177
_bzr_logger.exception(msg + cmd_info)
169
exc_str = format_exception_short(sys.exc_info())
171
log_exception_quietly()
174
def log_exception_quietly():
175
"""Log the last exception to the trace file only.
177
Used for exceptions that occur internally and that may be
178
interesting to developers but not to users. For example,
179
errors loading plugins.
182
debug(traceback.format_exc())
181
185
def enable_default_logging():
182
186
"""Configure default logging to stderr and .bzr.log"""
183
global _stderr_handler, _file_handler
187
# FIXME: if this is run twice, things get confused
188
global _stderr_handler, _file_handler, _trace_file, _bzr_log_file
185
189
_stderr_handler = logging.StreamHandler()
186
190
_stderr_handler.setFormatter(QuietFormatter())
191
logging.getLogger('').addHandler(_stderr_handler)
192
_stderr_handler.setLevel(logging.INFO)
188
193
if not _file_handler:
191
if os.environ.get('BZR_DEBUG'):
192
level = logging.DEBUG
195
_trace_file = _bzr_log_file
197
_file_handler.setLevel(logging.DEBUG)
198
_bzr_logger.setLevel(logging.DEBUG)
202
def be_quiet(quiet=True):
203
global _stderr_handler, _stderr_quiet
205
_stderr_quiet = quiet
207
_stderr_handler.setLevel(logging.WARNING)
196
_stderr_handler.setLevel(logging.INFO)
197
_file_handler.setLevel(level)
199
logging.getLogger('').addHandler(_stderr_handler)
209
_stderr_handler.setLevel(logging.INFO)
202
217
def disable_default_logging():
210
225
l.removeHandler(_stderr_handler)
211
226
if _file_handler:
212
227
l.removeHandler(_file_handler)
231
def enable_test_log(to_file):
232
"""Redirect logging to a temporary file for a test
234
returns an opaque reference that should be passed to disable_test_log
235
after the test completes.
237
disable_default_logging()
240
hdlr = logging.StreamHandler(to_file)
241
hdlr.setLevel(logging.DEBUG)
242
hdlr.setFormatter(logging.Formatter('%(levelname)8s %(message)s'))
243
_bzr_logger.addHandler(hdlr)
244
_bzr_logger.setLevel(logging.DEBUG)
245
result = hdlr, _trace_file, _trace_depth
246
_trace_file = to_file
251
def disable_test_log((test_log_hdlr, old_trace_file, old_trace_depth)):
252
_bzr_logger.removeHandler(test_log_hdlr)
253
test_log_hdlr.close()
256
_trace_file = old_trace_file
257
_trace_depth = old_trace_depth
259
enable_default_logging()
262
def format_exception_short(exc_info):
263
"""Make a short string form of an exception.
265
This is used for display to stderr. It specially handles exception
266
classes without useful string methods.
268
The result has no trailing newline.
270
exc_info - typically an exception from sys.exc_info()
272
exc_type, exc_object, exc_tb = exc_info
275
return '(no exception)'
276
if isinstance(exc_object, (BzrError, BzrNewError)):
277
return str(exc_object)
280
tb = traceback.extract_tb(exc_tb)
281
msg = '%s: %s' % (exc_type, exc_object)
285
msg += '\n at %s line %d\n in %s' % (tb[-1][:3])
287
except Exception, formatting_exc:
288
# XXX: is this really better than just letting it run up?
289
return '(error formatting exception of type %s: %s)' \
290
% (exc_type, formatting_exc)
added
removed
bzrlib/trace.py
