/usr/share/pyshared/bzrlib/uncommit.py is in python-bzrlib 2.6.0~bzr6526-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | # Copyright (C) 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Remove the last revision from the history of the current branch."""
from __future__ import absolute_import
# TODO: make the guts of this methods on tree, branch.
from bzrlib import (
errors,
revision as _mod_revision,
)
from bzrlib.branch import Branch
from bzrlib.errors import BoundBranchOutOfDate
def remove_tags(branch, graph, old_tip, parents):
"""Remove tags on revisions between old_tip and new_tip.
:param branch: Branch to remove tags from
:param graph: Graph object for branch repository
:param old_tip: Old branch tip
:param parents: New parents
:return: Names of the removed tags
"""
reverse_tags = branch.tags.get_reverse_tag_dict()
ancestors = graph.find_unique_ancestors(old_tip, parents)
removed_tags = []
for revid, tags in reverse_tags.iteritems():
if not revid in ancestors:
continue
for tag in tags:
branch.tags.delete_tag(tag)
removed_tags.append(tag)
return removed_tags
def uncommit(branch, dry_run=False, verbose=False, revno=None, tree=None,
local=False, keep_tags=False):
"""Remove the last revision from the supplied branch.
:param dry_run: Don't actually change anything
:param verbose: Print each step as you do it
:param revno: Remove back to this revision
:param local: If this branch is bound, only remove the revisions from the
local branch. If this branch is not bound, it is an error to pass
local=True.
:param keep_tags: Whether to keep tags pointing at the removed revisions
around.
"""
unlockable = []
try:
if tree is not None:
tree.lock_write()
unlockable.append(tree)
branch.lock_write()
unlockable.append(branch)
pending_merges = []
if tree is not None:
pending_merges = tree.get_parent_ids()[1:]
if local:
master = None
if branch.get_bound_location() is None:
raise errors.LocalRequiresBoundBranch()
else:
master = branch.get_master_branch()
if master is not None:
master.lock_write()
unlockable.append(master)
old_revno, old_tip = branch.last_revision_info()
if master is not None and old_tip != master.last_revision():
raise BoundBranchOutOfDate(branch, master)
if revno is None:
revno = old_revno
new_revno = revno - 1
cur_revno = old_revno
new_revision_id = old_tip
graph = branch.repository.get_graph()
for rev_id in graph.iter_lefthand_ancestry(old_tip):
if cur_revno == new_revno:
new_revision_id = rev_id
break
if verbose:
print 'Removing revno %d: %s' % (cur_revno, rev_id)
cur_revno -= 1
parents = graph.get_parent_map([rev_id]).get(rev_id, None)
if not parents:
continue
# When we finish popping off the pending merges, we want
# them to stay in the order that they used to be.
# but we pop from the end, so reverse the order, and
# then get the order right at the end
pending_merges.extend(reversed(parents[1:]))
else:
# We ran off the end of revisions, which means we should be trying
# to get to NULL_REVISION
new_revision_id = _mod_revision.NULL_REVISION
if not dry_run:
if master is not None:
master.set_last_revision_info(new_revno, new_revision_id)
branch.set_last_revision_info(new_revno, new_revision_id)
if master is None:
hook_local = None
hook_master = branch
else:
hook_local = branch
hook_master = master
for hook in Branch.hooks['post_uncommit']:
hook_new_tip = new_revision_id
if hook_new_tip == _mod_revision.NULL_REVISION:
hook_new_tip = None
hook(hook_local, hook_master, old_revno, old_tip, new_revno,
hook_new_tip)
if not _mod_revision.is_null(new_revision_id):
parents = [new_revision_id]
else:
parents = []
if tree is not None:
parents.extend(reversed(pending_merges))
tree.set_parent_ids(parents)
if branch.supports_tags() and not keep_tags:
remove_tags(branch, graph, old_tip, parents)
finally:
for item in reversed(unlockable):
item.unlock()
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