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# Copyright (C) 2018 Jelmer Vernooij <jelmer@jelmer.uk>
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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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"""Git Memory Trees."""
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from __future__ import absolute_import
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from dulwich.objects import (
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revision as _mod_revision,
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from breezy.transport.memory import MemoryTransport
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from .mapping import GitFileIdMap
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from .tree import MutableGitIndexTree
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class GitMemoryTree(MutableGitIndexTree,_mod_tree.Tree):
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"""A Git memory tree."""
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def __init__(self, branch, store, head):
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MutableGitIndexTree.__init__(self)
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self.mapping = self.branch.repository.get_mapping()
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self._lock_mode = None
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self._populate_from_branch()
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return self.branch.controldir
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def is_control_filename(self, path):
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def _gather_kinds(self, files, kinds):
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"""See MutableTree._gather_kinds.
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with self.lock_tree_write():
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for pos, f in enumerate(files):
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if kinds[pos] is None:
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kinds[pos] = self.kind(f)
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def put_file_bytes_non_atomic(self, path, bytes, file_id=None):
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"""See MutableTree.put_file_bytes_non_atomic."""
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self._file_transport.put_bytes(path, bytes)
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def _populate_from_branch(self):
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"""Populate the in-tree state from the branch."""
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if self.branch.head is None:
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self._parent_ids = [self.last_revision()]
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self._file_transport = MemoryTransport()
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if self.branch.head is None:
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self._basis_fileid_map = GitFileIdMap({}, self.mapping)
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tree_id = self.store[self.branch.head].tree
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self._basis_fileid_map = self.mapping.get_fileid_map(
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self.store.__getitem__, tree_id)
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tree = self.store[tree_id]
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self._fileid_map = self._basis_fileid_map.copy()
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(path, tree) = trees.pop()
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for name, mode, sha in tree.iteritems():
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subpath = posixpath.join(path, name)
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if stat.S_ISDIR(mode):
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self._file_transport.mkdir(subpath)
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trees.append((subpath, self.store[sha]))
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elif stat.S_ISREG(mode):
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self._file_transport.put_bytes(subpath, self.store[sha].data)
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self._index_add_entry(subpath, 'file')
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raise NotImplementedError(self._populate_from_branch)
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"""Lock the memory tree for reading.
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This triggers population of data from the branch for its revision.
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self.branch.lock_read()
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self._lock_mode = "r"
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self._populate_from_branch()
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return lock.LogicalLockResult(self.unlock)
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def lock_tree_write(self):
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"""See MutableTree.lock_tree_write()."""
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self.branch.lock_read()
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self._lock_mode = "w"
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self._populate_from_branch()
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elif self._lock_mode == "r":
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raise errors.ReadOnlyError(self)
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return lock.LogicalLockResult(self.unlock)
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def lock_write(self):
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"""See MutableTree.lock_write()."""
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self.branch.lock_write()
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self._lock_mode = "w"
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self._populate_from_branch()
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elif self._lock_mode == "r":
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raise errors.ReadOnlyError(self)
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return lock.LogicalLockResult(self.unlock)
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This frees all cached state when the last lock context for the tree is
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self._parent_ids = []
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self._lock_mode = None
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def _lstat(self, path):
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mem_stat = self._file_transport.stat(path)
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stat_val = os.stat_result(
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(mem_stat.st_mode, 0, 0, 0, 0, 0, mem_stat.st_size, 0, 0, 0))
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def get_file_with_stat(self, path, file_id=None):
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return (self.get_file(path, file_id), self._lstat(path))
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def get_file(self, path, file_id=None):
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"""See Tree.get_file."""
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return self._file_transport.get(path)
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def get_file_sha1(self, path, file_id=None, stat_value=None):
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"""See Tree.get_file_sha1()."""
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stream = self._file_transport.get(path)
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return osutils.sha_file(stream)
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def get_parent_ids(self):
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"""See Tree.get_parent_ids.
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This implementation returns the current cached value from
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with self.lock_read():
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return list(self._parent_ids)
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def last_revision(self):
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"""See MutableTree.last_revision."""
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with self.lock_read():
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if self.branch.head is None:
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return _mod_revision.NULL_REVISION
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return self.branch.repository.lookup_foreign_revision_id(self.branch.head)
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def basis_tree(self):
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"""See Tree.basis_tree()."""
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return self.branch.repository.revision_tree(self.last_revision())
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def get_config_stack(self):
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return self.branch.get_config_stack()
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def has_filename(self, path):
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return self._file_transport.has(path)
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def _set_merges_from_parent_ids(self, rhs_parent_ids):
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if self.branch.head is None:
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self._parent_ids = []
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self._parent_ids = [self.last_revision()]
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self._parent_ids.extend(rhs_parent_ids)
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def set_parent_ids(self, parent_ids, allow_leftmost_as_ghost=False):
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if len(parent_ids) == 0:
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self._parent_ids = []
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self.branch.head = None
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self._parent_ids = parent_ids
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self.branch.head = self.branch.repository.lookup_bzr_revision_id(parent_ids[0])[0]
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def mkdir(self, path, file_id=None):
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"""See MutableTree.mkdir()."""
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self.add(path, None, 'directory')
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self._file_transport.mkdir(path)
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def _rename_one(self, from_rel, to_rel):
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self._file_transport.rename(from_rel, to_rel)
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stat_value = self._file_transport.stat(p)
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return osutils.file_kind_from_stat_mode(stat_value.st_mode)
added
removed
memorytree.py
