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# Copyright (C) 2006-2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Full history branch formats."""
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from __future__ import absolute_import
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revision as _mod_revision,
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from bzrlib.branch import (
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from bzrlib.decorators import (
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from bzrlib.trace import mutter_callsite
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class FullHistoryBzrBranch(BzrBranch):
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"""Bzr branch which contains the full revision history."""
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def set_last_revision_info(self, revno, revision_id):
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if not revision_id or not isinstance(revision_id, basestring):
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raise errors.InvalidRevisionId(revision_id=revision_id, branch=self)
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revision_id = _mod_revision.ensure_null(revision_id)
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# this old format stores the full history, but this api doesn't
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# provide it, so we must generate, and might as well check it's
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history = self._lefthand_history(revision_id)
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if len(history) != revno:
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raise AssertionError('%d != %d' % (len(history), revno))
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self._set_revision_history(history)
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def _read_last_revision_info(self):
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rh = self._revision_history()
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return (revno, rh[-1])
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return (0, _mod_revision.NULL_REVISION)
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def _set_revision_history(self, rev_history):
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if 'evil' in debug.debug_flags:
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mutter_callsite(3, "set_revision_history scales with history.")
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check_not_reserved_id = _mod_revision.check_not_reserved_id
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for rev_id in rev_history:
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check_not_reserved_id(rev_id)
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if Branch.hooks['post_change_branch_tip']:
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# Don't calculate the last_revision_info() if there are no hooks
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old_revno, old_revid = self.last_revision_info()
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if len(rev_history) == 0:
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revid = _mod_revision.NULL_REVISION
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revid = rev_history[-1]
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self._run_pre_change_branch_tip_hooks(len(rev_history), revid)
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self._write_revision_history(rev_history)
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self._clear_cached_state()
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self._cache_revision_history(rev_history)
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if Branch.hooks['post_change_branch_tip']:
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self._run_post_change_branch_tip_hooks(old_revno, old_revid)
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def _write_revision_history(self, history):
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"""Factored out of set_revision_history.
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This performs the actual writing to disk.
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It is intended to be called by set_revision_history."""
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self._transport.put_bytes(
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'revision-history', '\n'.join(history),
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mode=self.bzrdir._get_file_mode())
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def _gen_revision_history(self):
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history = self._transport.get_bytes('revision-history').split('\n')
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if history[-1:] == ['']:
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# There shouldn't be a trailing newline, but just in case.
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def _synchronize_history(self, destination, revision_id):
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if not isinstance(destination, FullHistoryBzrBranch):
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super(BzrBranch, self)._synchronize_history(
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destination, revision_id)
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if revision_id == _mod_revision.NULL_REVISION:
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new_history = self._revision_history()
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if revision_id is not None and new_history != []:
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new_history = new_history[:new_history.index(revision_id) + 1]
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rev = self.repository.get_revision(revision_id)
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new_history = rev.get_history(self.repository)[1:]
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destination._set_revision_history(new_history)
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def generate_revision_history(self, revision_id, last_rev=None,
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"""Create a new revision history that will finish with revision_id.
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:param revision_id: the new tip to use.
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:param last_rev: The previous last_revision. If not None, then this
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must be a ancestory of revision_id, or DivergedBranches is raised.
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:param other_branch: The other branch that DivergedBranches should
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raise with respect to.
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self._set_revision_history(self._lefthand_history(revision_id,
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last_rev, other_branch))
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class BzrBranch5(FullHistoryBzrBranch):
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"""A format 5 branch. This supports new features over plain branches.
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It has support for a master_branch which is the data for bound branches.
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class BzrBranchFormat5(BranchFormatMetadir):
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"""Bzr branch format 5.
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- a revision-history file.
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- a lock dir guarding the branch itself
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- all of this stored in a branch/ subdirectory
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- works with shared repositories.
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This format is new in bzr 0.8.
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def _branch_class(self):
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def get_format_string(cls):
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"""See BranchFormat.get_format_string()."""
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return "Bazaar-NG branch format 5\n"
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def get_format_description(self):
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"""See BranchFormat.get_format_description()."""
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return "Branch format 5"
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def initialize(self, a_bzrdir, name=None, repository=None,
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append_revisions_only=None):
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"""Create a branch of this format in a_bzrdir."""
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if append_revisions_only:
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raise errors.UpgradeRequired(a_bzrdir.user_url)
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utf8_files = [('revision-history', ''),
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return self._initialize_helper(a_bzrdir, utf8_files, name, repository)
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def supports_tags(self):
added
removed
bzrlib/branchfmt/fullhistory.py
