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# Copyright (C) 2006, 2008, 2009, 2010 Canonical Ltd
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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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# 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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# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""TreeBuilder helper class.
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TreeBuilders are used to build trees of various shapes or properties. This
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can be extremely useful in testing for instance.
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from __future__ import absolute_import
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class AlreadyBuilding(errors.BzrError):
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_fmt = "The tree builder is already building a tree."
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class NotBuilding(errors.BzrError):
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_fmt = "Not currently building a tree."
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class TreeBuilder(object):
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"""A TreeBuilder allows the creation of specific content in one tree at a
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"""Construct a TreeBuilder."""
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self._root_done = False
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def build(self, recipe):
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"""Build recipe into the current tree.
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:param recipe: A sequence of paths. For each path, the corresponding
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path in the current tree is created and added. If the path ends in
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'/' then a directory is added, otherwise a regular file is added.
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self._ensure_building()
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if not self._root_done:
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self._tree.add('', b'root-id', 'directory')
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self._root_done = True
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if name.endswith('/'):
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self._tree.mkdir(name[:-1])
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content = b"contents of %s%s" % (name.encode('utf-8'), end)
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self._tree.add(name, None, 'file')
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self._tree.put_file_bytes_non_atomic(name, content)
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def _ensure_building(self):
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"""Raise NotBuilding if there is no current tree being built."""
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if self._tree is None:
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def finish_tree(self):
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"""Finish building the current tree."""
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self._ensure_building()
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def start_tree(self, tree):
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"""Start building on tree.
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:param tree: A tree to start building on. It must provide the
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MutableTree interface.
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if self._tree is not None:
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self._tree.lock_tree_write()