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bzrlib/tests/__init__.py
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            'BZR_PROGRESS_BAR': None,
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            'BZR_LOG': None,
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            'BZR_PLUGIN_PATH': None,
 
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            'BZR_DISABLE_PLUGINS': None,
 
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            'BZR_PLUGINS_AT': None,
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            'BZR_CONCURRENCY': None,
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            # Make sure that any text ui tests are consistent regardless of
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            # the environment the test case is run in; you may want tests that
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                unicodestr = log_contents.decode('utf8', 'replace')
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                log_contents = unicodestr.encode('utf8')
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            if not keep_log_file:
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                self._log_file.close()
 
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                close_attempts = 0
 
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                max_close_attempts = 100
 
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                first_close_error = None
 
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                while close_attempts < max_close_attempts:
 
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                    close_attempts += 1
 
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                    try:
 
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                        self._log_file.close()
 
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                    except IOError, ioe:
 
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                        if ioe.errno is None:
 
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                            # No errno implies 'close() called during
 
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                            # concurrent operation on the same file object', so
 
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                            # retry.  Probably a thread is trying to write to
 
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                            # the log file.
 
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                            if first_close_error is None:
 
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                                first_close_error = ioe
 
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                            continue
 
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                        raise
 
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                    else:
 
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                        break
 
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                if close_attempts > 1:
 
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                    sys.stderr.write(
 
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                        'Unable to close log file on first attempt, '
 
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                        'will retry: %s\n' % (first_close_error,))
 
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                    if close_attempts == max_close_attempts:
 
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                        sys.stderr.write(
 
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                            'Unable to close log file after %d attempts.\n'
 
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                            % (max_close_attempts,))
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                self._log_file = None
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                # Permit multiple calls to get_log until we clean it up in
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                # finishLogFile
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        'bzrlib.tests.commands',
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        'bzrlib.tests.per_branch',
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        'bzrlib.tests.per_bzrdir',
 
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        'bzrlib.tests.per_bzrdir_colo',
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        'bzrlib.tests.per_foreign_vcs',
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        'bzrlib.tests.per_interrepository',
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        'bzrlib.tests.per_intertree',