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# Copyright (C) 2005-2010 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
"""Helper functions for adding files to working trees."""
import sys
from bzrlib import (
osutils,
)
class AddAction(object):
"""A class which defines what action to take when adding a file."""
def __init__(self, to_file=None, should_print=None):
"""Initialize an action which prints added files to an output stream.
:param to_file: The stream to write into. This is expected to take
Unicode paths. If not supplied, it will default to ``sys.stdout``.
:param should_print: If False, printing will be suppressed.
"""
self._to_file = to_file
if to_file is None:
self._to_file = sys.stdout
self.should_print = False
if should_print is not None:
self.should_print = should_print
def __call__(self, inv, parent_ie, path, kind, _quote=osutils.quotefn):
"""Add path to inventory.
The default action does nothing.
:param inv: The inventory we are working with.
:param path: The FastPath being added
:param kind: The kind of the object being added.
"""
if self.should_print:
self._to_file.write('adding %s\n' % _quote(path))
return None
class AddFromBaseAction(AddAction):
"""This class will try to extract file ids from another tree."""
def __init__(self, base_tree, base_path, to_file=None, should_print=None):
super(AddFromBaseAction, self).__init__(to_file=to_file,
should_print=should_print)
self.base_tree = base_tree
self.base_path = base_path
def __call__(self, inv, parent_ie, path, kind):
# Place the parent call
# Now check to see if we can extract an id for this file
file_id, base_path = self._get_base_file_id(path, parent_ie)
if file_id is not None:
if self.should_print:
self._to_file.write('adding %s w/ file id from %s\n'
% (path, base_path))
else:
# we aren't doing anything special, so let the default
# reporter happen
file_id = super(AddFromBaseAction, self).__call__(
inv, parent_ie, path, kind)
return file_id
def _get_base_file_id(self, path, parent_ie):
"""Look for a file id in the base branch.
First, if the base tree has the parent directory,
we look for a file with the same name in that directory.
Else, we look for an entry in the base tree with the same path.
"""
if self.base_tree.has_id(parent_ie.file_id):
base_parent_ie = self.base_tree.inventory[parent_ie.file_id]
base_child_ie = base_parent_ie.children.get(
osutils.basename(path))
if base_child_ie is not None:
return (base_child_ie.file_id,
self.base_tree.id2path(base_child_ie.file_id))
full_base_path = osutils.pathjoin(self.base_path, path)
# This may return None, but it is our last attempt
return self.base_tree.path2id(full_base_path), full_base_path
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