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# Copyright (C) 2008 Aaron Bentley <aaron@aaronbentley.com>
#
# 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 cStringIO import StringIO
from bzrlib import merge3
from bzrlib import transform
class ShelfCreator(object):
def __init__(self, work_tree):
self.work_tree = work_tree
self.work_transform = transform.TreeTransform(work_tree)
self.base_tree = work_tree.basis_tree()
self.shelf_transform = transform.TransformPreview(self.base_tree)
self.renames = {}
self.iter_changes = work_tree.iter_changes(self.base_tree)
def __iter__(self):
for (file_id, paths, changed, versioned, parents, names, kind,
executable) in self.iter_changes:
if names[0] != names[1] or parents[0] != parents[1]:
self.renames[file_id] = (names, parents)
yield ('rename', file_id) + paths
if changed:
yield ('modify text', file_id)
def shelve_rename(self, file_id):
names, parents = self.renames[file_id]
w_trans_id = self.work_transform.trans_id_file_id(file_id)
work_parent = self.work_transform.trans_id_file_id(parents[0])
self.work_transform.adjust_path(names[0], work_parent, w_trans_id)
s_trans_id = self.shelf_transform.trans_id_file_id(file_id)
shelf_parent = self.shelf_transform.trans_id_file_id(parents[1])
self.shelf_transform.adjust_path(names[1], shelf_parent, s_trans_id)
def shelve_text(self, file_id, new_text):
s = StringIO()
s.writelines(new_text)
s.seek(0)
new_lines = s.readlines()
w_trans_id = self.work_transform.trans_id_file_id(file_id)
self.work_transform.delete_contents(w_trans_id)
self.work_transform.create_file(new_lines, w_trans_id)
s_trans_id = self.shelf_transform.trans_id_file_id(file_id)
self.shelf_transform.delete_contents(s_trans_id)
inverse_lines = self._inverse_lines(new_lines, file_id)
self.shelf_transform.create_file(inverse_lines, s_trans_id)
def _inverse_lines(self, new_lines, file_id):
"""Produce a version with only those changes removed from new_lines."""
base_lines = self.base_tree.get_file_lines(file_id)
tree_file = self.work_tree.get_file(file_id)
try:
tree_lines = tree_file.readlines()
finally:
tree_file.close()
return merge3.Merge3(new_lines, base_lines, tree_lines).merge_lines()
def finalize(self):
self.work_transform.finalize()
self.shelf_transform.finalize()
def transform(self):
self.work_transform.apply()
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