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# Copyright (C) 2005, 2006 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Messages and logging for bazaar-ng.
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Messages are supplied by callers as a string-formatting template, plus values
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to be inserted into it. The actual %-formatting is deferred to the log
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library so that it doesn't need to be done for messages that won't be emitted.
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Messages are classified by severity levels: critical, error, warning, info,
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They can be sent to two places: to stderr, and to ~/.bzr.log. For purposes
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such as running the test suite, they can also be redirected away from both of
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those two places to another location.
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~/.bzr.log gets all messages, and full tracebacks for uncaught exceptions.
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This trace file is always in UTF-8, regardless of the user's default encoding,
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so that we can always rely on writing any message.
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Output to stderr depends on the mode chosen by the user. By default, messages
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of info and above are sent out, which results in progress messages such as the
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list of files processed by add and commit. In quiet mode, only warnings and
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above are shown. In debug mode, stderr gets debug messages too.
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Errors that terminate an operation are generally passed back as exceptions;
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others may be just emitted as messages.
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Exceptions are reported in a brief form to stderr so as not to look scary.
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BzrErrors are required to be able to format themselves into a properly
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explanatory message. This is not true for builtin exceptions such as
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KeyError, which typically just str to "0". They're printed in a different
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# FIXME: Unfortunately it turns out that python's logging module
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# is quite expensive, even when the message is not printed by any handlers.
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# We should perhaps change back to just simply doing it here.
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from cStringIO import StringIO
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lazy_import(globals(), """
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from bzrlib import debug
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_stderr_handler = None
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_bzr_log_filename = None
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# configure convenient aliases for output routines
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_bzr_logger = logging.getLogger('bzr')
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def note(*args, **kwargs):
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# FIXME note always emits utf-8, regardless of the terminal encoding
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bzrlib.ui.ui_factory.clear_term()
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_bzr_logger.info(*args, **kwargs)
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def warning(*args, **kwargs):
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bzrlib.ui.ui_factory.clear_term()
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_bzr_logger.warning(*args, **kwargs)
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log_error = _bzr_logger.error
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error = _bzr_logger.error
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def mutter(fmt, *args):
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if _trace_file is None:
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if (getattr(_trace_file, 'closed', None) is not None) and _trace_file.closed:
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if isinstance(fmt, unicode):
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fmt = fmt.encode('utf8')
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# It seems that if we do ascii % (unicode, ascii) we can
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# get a unicode cannot encode ascii error, so make sure that "fmt"
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# is a unicode string
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if isinstance(arg, unicode):
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arg = arg.encode('utf8')
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real_args.append(arg)
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out = fmt % tuple(real_args)
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_trace_file.write(out)
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# TODO: jam 20051227 Consider flushing the trace file to help debugging
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def mutter_callsite(stacklevel, fmt, *args):
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"""Perform a mutter of fmt and args, logging the call trace.
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:param stacklevel: The number of frames to show. None will show all
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:param fmt: The format string to pass to mutter.
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:param args: A list of substitution variables.
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traceback.print_stack(limit=stacklevel + 1, file=outf)
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formatted_lines = outf.getvalue().splitlines()
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formatted_stack = '\n'.join(formatted_lines[:-2])
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mutter(fmt + "\nCalled from:\n%s", *(args + (formatted_stack,)))
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def _rollover_trace_maybe(trace_fname):
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size = os.stat(trace_fname)[stat.ST_SIZE]
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old_fname = trace_fname + '.old'
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from osutils import rename
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rename(trace_fname, old_fname)
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def open_tracefile(tracefilename=None):
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# Messages are always written to here, so that we have some
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# information if something goes wrong. In a future version this
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# file will be removed on successful completion.
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global _file_handler, _bzr_log_file, _bzr_log_filename
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if tracefilename is None:
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if sys.platform == 'win32':
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from bzrlib import win32utils
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home = win32utils.get_home_location()
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home = os.path.expanduser('~')
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_bzr_log_filename = os.path.join(home, '.bzr.log')
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_bzr_log_filename = tracefilename
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_bzr_log_filename = os.path.expanduser(_bzr_log_filename)
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_rollover_trace_maybe(_bzr_log_filename)
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#tf = codecs.open(trace_fname, 'at', 'utf8', buffering=LINE_BUFFERED)
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tf = open(_bzr_log_filename, 'at', LINE_BUFFERED)
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# tf.tell() on windows always return 0 until some writing done
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tf.write("this is a debug log for diagnosing/reporting problems in bzr\n")
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tf.write("you can delete or truncate this file, or include sections in\n")
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tf.write("bug reports to bazaar@lists.canonical.com\n\n")
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_file_handler = logging.StreamHandler(tf)
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fmt = r'[%(process)5d] %(asctime)s.%(msecs)03d %(levelname)s: %(message)s'
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datefmt = r'%a %H:%M:%S'
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_file_handler.setFormatter(logging.Formatter(fmt, datefmt))
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_file_handler.setLevel(logging.DEBUG)
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logging.getLogger('').addHandler(_file_handler)
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warning("failed to open trace file: %s" % (e))
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def log_exception_quietly():
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"""Log the last exception to the trace file only.
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Used for exceptions that occur internally and that may be
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interesting to developers but not to users. For example,
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errors loading plugins.
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mutter(traceback.format_exc())
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def enable_default_logging():
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"""Configure default logging to stderr and .bzr.log"""
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# FIXME: if this is run twice, things get confused
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global _stderr_handler, _file_handler, _trace_file, _bzr_log_file
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_stderr_handler = logging.StreamHandler()
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logging.getLogger('').addHandler(_stderr_handler)
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_stderr_handler.setLevel(logging.INFO)
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if not _file_handler:
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_trace_file = _bzr_log_file
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_file_handler.setLevel(logging.DEBUG)
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_bzr_logger.setLevel(logging.DEBUG)
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def be_quiet(quiet=True):
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global _stderr_handler, _stderr_quiet
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_stderr_quiet = quiet
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_stderr_handler.setLevel(logging.WARNING)
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_stderr_handler.setLevel(logging.INFO)
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def disable_default_logging():
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"""Turn off default log handlers.
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This is intended to be used by the test framework, which doesn't
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want leakage from the code-under-test into the main logs.
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l = logging.getLogger('')
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l.removeHandler(_stderr_handler)
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l.removeHandler(_file_handler)
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def enable_test_log(to_file):
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"""Redirect logging to a temporary file for a test
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returns an opaque reference that should be passed to disable_test_log
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after the test completes.
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disable_default_logging()
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hdlr = logging.StreamHandler(to_file)
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hdlr.setLevel(logging.DEBUG)
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hdlr.setFormatter(logging.Formatter('%(levelname)8s %(message)s'))
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_bzr_logger.addHandler(hdlr)
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_bzr_logger.setLevel(logging.DEBUG)
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result = hdlr, _trace_file, _trace_depth
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_trace_file = to_file
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def disable_test_log((test_log_hdlr, old_trace_file, old_trace_depth)):
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_bzr_logger.removeHandler(test_log_hdlr)
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test_log_hdlr.close()
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_trace_file = old_trace_file
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_trace_depth = old_trace_depth
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enable_default_logging()
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def report_exception(exc_info, err_file):
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exc_type, exc_object, exc_tb = exc_info
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# Log the full traceback to ~/.bzr.log
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log_exception_quietly()
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if (isinstance(exc_object, IOError)
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and getattr(exc_object, 'errno', None) == errno.EPIPE):
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print >>err_file, "bzr: broken pipe"
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elif isinstance(exc_object, KeyboardInterrupt):
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print >>err_file, "bzr: interrupted"
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elif not getattr(exc_object, 'internal_error', True):
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report_user_error(exc_info, err_file)
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elif isinstance(exc_object, (OSError, IOError)):
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# Might be nice to catch all of these and show them as something more
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# specific, but there are too many cases at the moment.
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report_user_error(exc_info, err_file)
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report_bug(exc_info, err_file)
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# TODO: Should these be specially encoding the output?
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def report_user_error(exc_info, err_file):
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"""Report to err_file an error that's not an internal error.
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These don't get a traceback unless -Derror was given.
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if 'error' in debug.debug_flags:
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report_bug(exc_info, err_file)
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print >>err_file, "bzr: ERROR:", str(exc_info[1])
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def report_bug(exc_info, err_file):
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"""Report an exception that probably indicates a bug in bzr"""
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exc_type, exc_object, exc_tb = exc_info
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print >>err_file, "bzr: ERROR: %s.%s: %s" % (
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exc_type.__module__, exc_type.__name__, exc_object)
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traceback.print_exception(exc_type, exc_object, exc_tb, file=err_file)
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print >>err_file, 'bzr %s on python %s (%s)' % \
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'.'.join(map(str, sys.version_info)),
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print >>err_file, 'arguments: %r' % sys.argv
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print >>err_file, "** please send this report to bazaar@lists.ubuntu.com"
added
removed
bzrlib/trace.py
