~abentley/bzrtools/bzrtools.dev

# Copyright (C) 2008 Aaron Bentley

#

#    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from bzrlib.transform import TreeTransform

def link_tree(target_tree, source_tree):

    tt = TreeTransform(target_tree)

    try:

        for (file_id, paths, changed_content, versioned, parent, name, kind,

             executable) in target_tree.iter_changes(source_tree,

             include_unchanged=True):

            if changed_content:

                continue

            if kind != ('file', 'file'):

                continue

            if executable[0] != executable[1]:

                continue

            trans_id = tt.trans_id_tree_file_id(file_id)

            tt.delete_contents(trans_id)

            tt.create_hardlink(source_tree.id2abspath(file_id), trans_id)

        tt.apply()

    finally:

        tt.finalize()