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link_tree.py

 

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# Copyright (C) 2008 Aaron Bentley

 

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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.transform import TreeTransform

 

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def link_tree(target_tree, source_tree):

 

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    tt = TreeTransform(target_tree)

 

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    try:

 

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

 

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             executable) in target_tree.iter_changes(source_tree,

 

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             include_unchanged=True):

 

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            if changed_content:

 

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                continue

 

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

 

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                continue

 

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

 

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                continue

 

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            trans_id = tt.trans_id_tree_file_id(file_id)

 

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            tt.delete_contents(trans_id)

 

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

 

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        tt.apply()

 

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    finally:

 

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        tt.finalize()

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