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  • Committer: Jelmer Vernooij
  • Date: 2020-03-22 01:35:14 UTC
  • mfrom: (7490.7.6 work)
  • mto: This revision was merged to the branch mainline in revision 7499.
  • Revision ID: jelmer@jelmer.uk-20200322013514-7vw1ntwho04rcuj3
merge lp:brz/3.1.

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breezy/lockable_files.py
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from __future__ import absolute_import
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from .lazy_import import lazy_import
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lazy_import(globals(), """
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import warnings
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from breezy import (
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    counted_lock,
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    errors,
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    lock,
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    osutils,
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    transactions,
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    urlutils,
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    )
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""")
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from . import (
 
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    errors,
 
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    )
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from .decorators import (
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    only_raises,
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    )
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        """
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        if self._lock_mode:
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            if (self._lock_mode != 'w'
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                or not self.get_transaction().writeable()):
 
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                    or not self.get_transaction().writeable()):
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                raise errors.ReadOnlyError(self)
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            self._lock.validate_token(token)
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            self._lock_count += 1
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            return self._token_from_lock
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        else:
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            token_from_lock = self._lock.lock_write(token=token)
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            #traceback.print_stack()
 
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            # traceback.print_stack()
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            self._lock_mode = 'w'
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            self._lock_count = 1
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            self._set_write_transaction()
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            self._lock_count += 1
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        else:
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            self._lock.lock_read()
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            #traceback.print_stack()
 
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            # traceback.print_stack()
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            self._lock_mode = 'r'
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            self._lock_count = 1
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            self._set_read_transaction()
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        if self._lock_count > 1:
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            self._lock_count -= 1
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        else:
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            #traceback.print_stack()
 
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            # traceback.print_stack()
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            self._finish_transaction()
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            try:
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                self._lock.unlock()
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    This is suitable for use only in WorkingTrees (which are at present
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    always local).
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    """
 
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    def __init__(self, transport, escaped_name, file_modebits, dir_modebits):
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        self._transport = transport
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        self._escaped_name = escaped_name
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        """Create lock mechanism"""
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        # for old-style locks, create the file now
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        self._transport.put_bytes(self._escaped_name, b'',
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                            mode=self._file_modebits)
 
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                                  mode=self._file_modebits)
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    def validate_token(self, token):
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        if token is not None: