146
146
output_to, reverse=False):
147
147
"""Perform a diff between two entries of the same kind."""
149
def find_previous_heads(self, previous_inventories, entry_weave):
150
"""Return the revisions and entries that directly preceed this.
152
Returned as a map from revision to inventory entry.
154
This is a map containing the file revisions in all parents
155
for which the file exists, and its revision is not a parent of
156
any other. If the file is new, the set will be empty.
158
def get_ancestors(weave, entry):
159
return set(map(weave.idx_to_name,
160
weave.inclusions([weave.lookup(entry.revision)])))
163
for inv in previous_inventories:
164
if self.file_id in inv:
165
ie = inv[self.file_id]
166
assert ie.file_id == self.file_id
167
if ie.revision in heads:
168
assert heads[ie.revision] == ie
170
# may want to add it.
171
# may already be covered:
172
already_present = 0 != len(
173
[head for head in heads
174
if ie.revision in head_ancestors[head]])
176
# an ancestor of a known head.
179
ancestors = get_ancestors(entry_weave, ie)
180
# may knock something else out:
181
check_heads = list(heads.keys())
182
for head in check_heads:
183
if head in ancestors:
184
# this head is not really a head
186
head_ancestors[ie.revision] = ancestors
187
heads[ie.revision] = ie
190
149
def get_tar_item(self, root, dp, now, tree):
191
150
"""Get a tarfile item and a file stream for its content."""
192
151
item = tarfile.TarInfo(os.path.join(root, dp))
312
def snapshot(self, revision, path, previous_entries,
313
work_tree, weave_store):
271
def snapshot(self, revision, path, previous_entries, work_tree,
314
273
"""Make a snapshot of this entry which may or may not have changed.
316
275
This means that all its fields are populated, that it has its