bzr branch
http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar
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7490.110.1
by Jelmer Vernooij
Add a MemoryBranch. |
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# Copyright (C) 2020 Breezy Developers
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#
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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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#
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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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#
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""MemoryBranch object.
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"""
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from __future__ import absolute_import |
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from . import config as _mod_config, errors, osutils |
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from .branch import Branch |
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from .lock import LogicalLockResult, _RelockDebugMixin |
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from .revision import NULL_REVISION |
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from .tag import DisabledTags, MemoryTags |
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class MemoryBranch(Branch, _RelockDebugMixin): |
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def __init__(self, repository, last_revision_info, tags=None): |
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self.repository = repository |
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self._last_revision_info = last_revision_info |
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self._revision_history_cache = None |
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if tags is not None: |
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self.tags = MemoryTags(tags) |
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else: |
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self.tags = DisabledTags(self) |
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self._partial_revision_history_cache = [] |
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self._last_revision_info_cache = None |
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self._revision_id_to_revno_cache = None |
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self._partial_revision_id_to_revno_cache = {} |
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self.base = 'memory://' + osutils.rand_chars(10) |
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def get_config(self): |
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return _mod_config.Config() |
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def lock_read(self): |
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self.repository.lock_read() |
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return LogicalLockResult(self.unlock) |
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def lock_write(self, token=None): |
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self.repository.lock_write() |
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return BranchWriteLockResult(self.unlock, None) |
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def unlock(self): |
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self.repository.unlock() |
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def last_revision_info(self): |
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return self._last_revision_info |
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def _gen_revision_history(self): |
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"""Generate the revision history from last revision |
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"""
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last_revno, last_revision = self.last_revision_info() |
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with self.lock_read(): |
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self._extend_partial_history() |
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return list(reversed(self._partial_revision_history_cache)) |
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def get_rev_id(self, revno, history=None): |
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"""Find the revision id of the specified revno.""" |
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with self.lock_read(): |
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if revno == 0: |
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return NULL_REVISION |
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last_revno, last_revid = self.last_revision_info() |
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if revno == last_revno: |
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return last_revid |
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if last_revno is None: |
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self._extend_partial_history() |
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return self._partial_revision_history_cache[ |
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len(self._partial_revision_history_cache) - revno] |
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else: |
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if revno <= 0 or revno > last_revno: |
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raise errors.NoSuchRevision(self, revno) |
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distance_from_last = last_revno - revno |
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if len(self._partial_revision_history_cache) <= \ |
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distance_from_last: |
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self._extend_partial_history(distance_from_last) |
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return self._partial_revision_history_cache[distance_from_last] |