~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


"""Messages and logging for bazaar-ng

Messages are sent out through the Python logging library.

They can be sent to two places: to stderr, and to ~/.bzr.log.

~/.bzr.log gets all messages, and tracebacks of all uncaught
exceptions.

Normally stderr only gets messages of level INFO and higher, and gets
only a summary of exceptions, not the traceback.
"""


# TODO: in debug mode, stderr should get full tracebacks and also
# debug messages.  (Is this really needed?)

# TODO: When running the test suites, we should add an additional
# logger that sends messages into the test log file.


import sys
import os
import logging
import traceback


_file_handler = None
_stderr_handler = None


class QuietFormatter(logging.Formatter):
    """Formatter that supresses the details of errors.

    This is used by default on stderr so as not to scare the user.
    """
    # At first I tried overriding formatException to suppress the
    # exception details, but that has global effect: no loggers
    # can get the exception details is we suppress them here.

    def format(self, record):
        if record.levelno >= logging.WARNING:
            s = 'bzr: ' + record.levelname + ': '
        else:
            s = ''
            
        s += record.getMessage()

        ##import textwrap
        ##s = textwrap.fill(s)
            
        if record.exc_info:
            # give just a summary of the exception, not the whole thing
            exinfo = traceback.extract_tb(record.exc_info[2])
            # the format of this string matches one of the REs
            s += '\n'
            s += ('  at %s line %d, in %s()\n' % exinfo[-1][:3])
            s += '  see ~/.bzr.log for debug information'

        return s
        



################
# configure convenient aliases for output routines

_bzr_logger = logging.getLogger('bzr')
_bzr_logger.setLevel(logging.DEBUG) 

info = note = _bzr_logger.info
warning =   _bzr_logger.warning
log_error = _bzr_logger.error
error =     _bzr_logger.error
mutter =    _bzr_logger.debug
debug =     _bzr_logger.debug




# we do the rollover using this code, rather than the default from python
# logging, because we only want to rollover at program startup, not on each
# message.  maybe that's not a good enough reason.

def _rollover_trace_maybe(trace_fname):
    import stat
    try:
        size = os.stat(trace_fname)[stat.ST_SIZE]
        if size <= 4 << 20:
            return
        old_fname = trace_fname + '.old'

        from osutils import rename
        rename(trace_fname, old_fname)

    except OSError:
        return



def open_tracefile(tracefilename='~/.bzr.log'):
    # Messages are always written to here, so that we have some
    # information if something goes wrong.  In a future version this
    # file will be removed on successful completion.
    global _file_handler
    import stat, codecs

    trace_fname = os.path.join(os.path.expanduser(tracefilename))
    _rollover_trace_maybe(trace_fname)

    # buffering=1 means line buffered
    try:
        tf = codecs.open(trace_fname, 'at', 'utf8', buffering=1)

        if os.fstat(tf.fileno())[stat.ST_SIZE] == 0:
            tf.write("\nthis is a debug log for diagnosing/reporting problems in bzr\n")
            tf.write("you can delete or truncate this file, or include sections in\n")
            tf.write("bug reports to bazaar-ng@lists.canonical.com\n\n")
        
        _file_handler = logging.StreamHandler(tf)
        fmt = r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s'
        datefmt = r'%a %H:%M:%S'
        _file_handler.setFormatter(logging.Formatter(fmt, datefmt))
        _file_handler.setLevel(logging.DEBUG)
        logging.getLogger('').addHandler(_file_handler)

    except IOError, e:
        warning("failed to open trace file: %s" % (e))


def log_startup(argv):
    import bzrlib

    debug('bzr %s invoked on python %s (%s)',
          bzrlib.__version__,
          '.'.join(map(str, sys.version_info)),
          sys.platform)

    debug('  arguments: %r', argv)
    debug('  working dir: %s', os.getcwdu())


def log_exception(msg=None):
    """Log the last exception into the trace file.

    The exception string representation is used as the error
    summary, unless msg is given.
    """
    cmd_repr = ' '.join(repr(arg) for arg in sys.argv)
    cmd_info = '\n  command: %s\n  pwd: %s' \
        % (cmd_repr, os.getcwd())
    if msg == None:
        ei = sys.exc_info()
        msg = str(ei[1])
    if msg and (msg[-1] == '\n'):
        msg = msg[:-1]
    ## msg = "(%s) %s" % (str(type(ei[1])), msg)
    _bzr_logger.exception(msg + cmd_info)



def enable_default_logging():
    """Configure default logging to stderr and .bzr.log"""
    global _stderr_handler, _file_handler

    _stderr_handler = logging.StreamHandler()
    _stderr_handler.setFormatter(QuietFormatter())

    if not _file_handler:
        open_tracefile()

    if os.environ.get('BZR_DEBUG'):
        level = logging.DEBUG
    else:
        level = logging.INFO

    _stderr_handler.setLevel(logging.INFO)
    _file_handler.setLevel(level)

    logging.getLogger('').addHandler(_stderr_handler)


def disable_default_logging():
    """Turn off default log handlers.

    This is intended to be used by the test framework, which doesn't
    want leakage from the code-under-test into the main logs.
    """

    l = logging.getLogger('')
    l.removeHandler(_stderr_handler)
    if _file_handler:
        l.removeHandler(_file_handler)