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  • Committer: Robert Collins
  • Date: 2005-10-24 07:01:08 UTC
  • mto: (147.1.42) (364.1.3 bzrtools)
  • mto: This revision was merged to the branch mainline in revision 324.
  • Revision ID: robertc@robertcollins.net-20051024070108-f85025066b05f809
use sets and strings to optimise finding indirect merges somewhat

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cbranch.py
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# Copyright (C) 2006, 2008 Aaron Bentley
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# <aaron@aaronbentley.com>
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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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from bzrlib import ui
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from bzrlib.bzrdir import BzrDir
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from bzrlib.branch import Branch
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from bzrlib.config import LocationConfig
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from bzrlib.errors import BzrCommandError, NoSuchFile
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from bzrlib.osutils import pathjoin, basename, abspath
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from bzrlib.transport import get_transport
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from bzrlib.workingtree import WorkingTree
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from bzrlib.urlutils import derive_to_location
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def cbranch(from_location, to_location=None, revision=None,
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            lightweight=False, files_from=None, hardlink=False):
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    if to_location is None:
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        to_location = derive_to_location(from_location)
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    config = LocationConfig(abspath(to_location))
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    b_loc = config.get_user_option("cbranch_target")
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    if b_loc is None:
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        b_root = config.get_user_option("cbranch_root")
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        if b_root is None:
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            raise BzrCommandError("Can't find cbranch_target in"
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                                  " locations.conf")
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        b_loc = pathjoin(b_root, basename(to_location))
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    accelerator_tree, old_branch = BzrDir.open_tree_or_branch(from_location)
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    if files_from is not None:
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        accelerator_tree = WorkingTree.open(files_from)
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    if revision is None or len(revision) == 0:
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        revision_id = old_branch.last_revision()
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    elif len(revision) == 1:
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        revision_id = revision[0].in_history(old_branch)[1]
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    else:
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        raise BzrCommandError('At most one revision may be supplied.')
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    b_transport = get_transport(b_loc)
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    ensure_base_recursive(b_transport.clone('..'))
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    pb = ui.ui_factory.nested_progress_bar()
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    try:
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        pb.update('Creating branch', 0, 2)
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        new_branch = old_branch.bzrdir.sprout(b_loc, revision_id,
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            accelerator_tree=accelerator_tree).open_branch()
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        pb.update('Creating checkout', 1, 2)
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        new_branch.create_checkout(to_location, lightweight=lightweight,
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                                   accelerator_tree=accelerator_tree,
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                                   hardlink=hardlink)
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    finally:
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        pb.finished()
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def ensure_base_recursive(transport):
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    """Ensure that the transport base and any its parents exist"""
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    pending_transports = [transport]
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    while len(pending_transports) > 0:
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        transport = pending_transports.pop()
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        try:
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            transport.ensure_base()
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        except NoSuchFile, e:
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            pending_transports.append(transport)
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            parent = transport.clone('..')
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            if parent.base == transport.base:
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                raise e
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            pending_transports.append(parent)