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
69
s = 'bzr: ' + record.levelname + ': '
66
72
s += record.getMessage()
69
##s = textwrap.fill(s)
71
73
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'
74
s += '\n' + format_exception_short(record.exc_info)
85
77
# configure convenient aliases for output routines
87
79
_bzr_logger = logging.getLogger('bzr')
88
_bzr_logger.setLevel(logging.DEBUG)
90
81
info = note = _bzr_logger.info
91
82
warning = _bzr_logger.warning
92
83
log_error = _bzr_logger.error
93
84
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.
87
def mutter(fmt, *args):
88
if _trace_file is None:
90
if hasattr(_trace_file, 'closed') and _trace_file.closed:
97
_trace_file.write(out)
104
101
def _rollover_trace_maybe(trace_fname):
108
105
if size <= 4 << 20:
110
107
old_fname = trace_fname + '.old'
112
108
from osutils import rename
113
109
rename(trace_fname, old_fname)
120
114
def open_tracefile(tracefilename='~/.bzr.log'):
121
115
# Messages are always written to here, so that we have some
122
116
# information if something goes wrong. In a future version this
123
117
# file will be removed on successful completion.
118
global _file_handler, _bzr_log_file
125
119
import stat, codecs
127
121
trace_fname = os.path.join(os.path.expanduser(tracefilename))
128
122
_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:
125
tf = codecs.open(trace_fname, 'at', 'utf8', buffering=LINE_BUFFERED)
135
128
tf.write("\nthis is a debug log for diagnosing/reporting problems in bzr\n")
136
129
tf.write("you can delete or truncate this file, or include sections in\n")
137
130
tf.write("bug reports to bazaar-ng@lists.canonical.com\n\n")
139
131
_file_handler = logging.StreamHandler(tf)
140
132
fmt = r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s'
141
133
datefmt = r'%a %H:%M:%S'
142
134
_file_handler.setFormatter(logging.Formatter(fmt, datefmt))
143
135
_file_handler.setLevel(logging.DEBUG)
144
136
logging.getLogger('').addHandler(_file_handler)
146
137
except IOError, e:
147
138
warning("failed to open trace file: %s" % (e))
150
141
def log_startup(argv):
153
debug('bzr %s invoked on python %s (%s)',
142
debug('\n\nbzr %s invoked on python %s (%s)',
154
143
bzrlib.__version__,
155
144
'.'.join(map(str, sys.version_info)),
158
146
debug(' arguments: %r', argv)
159
147
debug(' working dir: %r', os.getcwdu())
165
153
The exception string representation is used as the error
166
154
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)
159
exc_str = format_exception_short(sys.exc_info())
161
log_exception_quietly()
181
164
def log_exception_quietly():
185
168
interesting to developers but not to users. For example,
186
169
errors loading plugins.
188
172
debug(traceback.format_exc())
191
175
def enable_default_logging():
192
176
"""Configure default logging to stderr and .bzr.log"""
193
global _stderr_handler, _file_handler
177
# FIXME: if this is run twice, things get confused
178
global _stderr_handler, _file_handler, _trace_file, _bzr_log_file
195
179
_stderr_handler = logging.StreamHandler()
196
180
_stderr_handler.setFormatter(QuietFormatter())
181
logging.getLogger('').addHandler(_stderr_handler)
182
_stderr_handler.setLevel(logging.INFO)
198
183
if not _file_handler:
201
if os.environ.get('BZR_DEBUG'):
202
level = logging.DEBUG
185
_trace_file = _bzr_log_file
187
_file_handler.setLevel(logging.DEBUG)
188
_bzr_logger.setLevel(logging.DEBUG)
192
def be_quiet(quiet=True):
193
global _stderr_handler, _stderr_quiet
195
_stderr_quiet = quiet
197
_stderr_handler.setLevel(logging.WARNING)
206
_stderr_handler.setLevel(logging.INFO)
207
_file_handler.setLevel(level)
209
logging.getLogger('').addHandler(_stderr_handler)
199
_stderr_handler.setLevel(logging.INFO)
212
207
def disable_default_logging():
220
215
l.removeHandler(_stderr_handler)
221
216
if _file_handler:
222
217
l.removeHandler(_file_handler)
221
def enable_test_log(to_file):
222
"""Redirect logging to a temporary file for a test
224
returns an opaque reference that should be passed to disable_test_log
225
after the test complete.
227
disable_default_logging()
229
hdlr = logging.StreamHandler(to_file)
230
hdlr.setLevel(logging.DEBUG)
231
hdlr.setFormatter(logging.Formatter('%(levelname)8s %(message)s'))
232
_bzr_logger.addHandler(hdlr)
233
_bzr_logger.setLevel(logging.DEBUG)
234
result = hdlr, _trace_file
235
_trace_file = to_file
239
def disable_test_log((test_log_hdlr, old_trace_file)):
240
_bzr_logger.removeHandler(test_log_hdlr)
241
_trace_file = old_trace_file
242
enable_default_logging()
245
def format_exception_short(exc_info):
246
"""Make a short string form of an exception.
248
This is used for display to stderr. It specially handles exception
249
classes without useful string methods.
251
The result has no trailing newline.
253
exc_info - typically an exception from sys.exc_info()
255
exc_type, exc_object, exc_tb = exc_info
258
return '(no exception)'
259
if isinstance(exc_object, (BzrError, BzrNewError)):
260
return str(exc_object)
263
tb = traceback.extract_tb(exc_tb)
264
msg = '%s: %s' % (exc_type, exc_object)
268
msg += '\n at %s line %d\n in %s' % (tb[-1][:3])
270
except Exception, formatting_exc:
271
# XXX: is this really better than just letting it run up?
272
return '(error formatting exception of type %s: %s)' \
273
% (exc_type, formatting_exc)