/brz/remove-bazaar

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  • Committer: Robert Collins
  • Date: 2005-10-16 22:31:25 UTC
  • mto: This revision was merged to the branch mainline in revision 1458.
  • Revision ID: robertc@lifelesslap.robertcollins.net-20051016223125-26d4401cb94b7b82
Branch.relpath has been moved to WorkingTree.relpath.

WorkingTree no no longer takes an inventory, rather it takes an optional branch
parameter, and if None is given will open the branch at basedir implicitly.

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bzrlib/uncommit.py
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# Copyright (C) 2006 Canonical Ltd
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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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"""Remove the last revision from the history of the current branch."""
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# TODO: make the guts of this methods on tree, branch.
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from bzrlib import (
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    errors,
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    revision as _mod_revision,
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    )
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from bzrlib.branch import Branch
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from bzrlib.errors import BoundBranchOutOfDate
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def uncommit(branch, dry_run=False, verbose=False, revno=None, tree=None,
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             local=False):
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    """Remove the last revision from the supplied branch.
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    :param dry_run: Don't actually change anything
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    :param verbose: Print each step as you do it
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    :param revno: Remove back to this revision
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    :param local: If this branch is bound, only remove the revisions from the
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        local branch. If this branch is not bound, it is an error to pass
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        local=True.
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    """
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    unlockable = []
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    try:
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        if tree is not None:
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            tree.lock_write()
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            unlockable.append(tree)
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        branch.lock_write()
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        unlockable.append(branch)
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        pending_merges = []
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        if tree is not None:
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            pending_merges = tree.get_parent_ids()[1:]
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        if local:
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            master = None
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            if branch.get_bound_location() is None:
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                raise errors.LocalRequiresBoundBranch()
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        else:
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            master = branch.get_master_branch()
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            if master is not None:
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                master.lock_write()
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                unlockable.append(master)
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        old_revno, old_tip = branch.last_revision_info()
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        if master is not None and old_tip != master.last_revision():
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            raise BoundBranchOutOfDate(branch, master)
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        if revno is None:
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            revno = old_revno
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        new_revno = revno - 1
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        revid_iterator = branch.repository.iter_reverse_revision_history(
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                            old_tip)
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        cur_revno = old_revno
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        new_revision_id = old_tip
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        graph = branch.repository.get_graph()
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        for rev_id in revid_iterator:
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            if cur_revno == new_revno:
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                new_revision_id = rev_id
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                break
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            if verbose:
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                print 'Removing revno %d: %s' % (cur_revno, rev_id)
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            cur_revno -= 1
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            parents = graph.get_parent_map([rev_id]).get(rev_id, None)
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            if not parents:
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                continue
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            # When we finish popping off the pending merges, we want
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            # them to stay in the order that they used to be.
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            # but we pop from the end, so reverse the order, and
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            # then get the order right at the end
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            pending_merges.extend(reversed(parents[1:]))
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        else:
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            # We ran off the end of revisions, which means we should be trying
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            # to get to NULL_REVISION
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            new_revision_id = _mod_revision.NULL_REVISION
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        if not dry_run:
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            if master is not None:
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                master.set_last_revision_info(new_revno, new_revision_id)
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            branch.set_last_revision_info(new_revno, new_revision_id)
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            if master is None:
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                hook_local = None
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                hook_master = branch
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            else:
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                hook_local = branch
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                hook_master = master
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            for hook in Branch.hooks['post_uncommit']:
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                hook_new_tip = new_revision_id
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                if hook_new_tip == _mod_revision.NULL_REVISION:
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                    hook_new_tip = None
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                hook(hook_local, hook_master, old_revno, old_tip, new_revno,
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                     hook_new_tip)
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            if tree is not None:
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                if not _mod_revision.is_null(new_revision_id):
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                    parents = [new_revision_id]
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                else:
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                    parents = []
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                parents.extend(reversed(pending_merges))
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                tree.set_parent_ids(parents)
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    finally:
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        for item in reversed(unlockable):
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            item.unlock()