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- Committer: Aaron Bentley
- Date: 2005-09-29 21:07:17 UTC
- mfrom: (1393.1.6)
- mto: (1185.25.1)
- mto: This revision was merged to the branch mainline in revision 1419.
- Revision ID: abentley@panoramicfeedback.com-20050929210717-cd73981590f17017
Merged the weave changes
- files added:
- NEWS.developers
- files removed:
- bzrlib/upgrade.py
- files renamed:
- tools/testweave.py => bzrlib/selftest/test_weave.py
- tools/history2weaves.py => bzrlib/upgrade.py
- bzrlib/newinventory.py => contrib/newinventory.py
- files modified:
- .bzrignore
added
removed
bzrlib/commit.py
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# Copyright (C) 2005 Canonical Ltd
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#
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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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#
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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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#
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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def commit(branch, message,
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timestamp=None,
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timezone=None,
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committer=None,
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verbose=True,
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specific_files=None,
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rev_id=None,
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allow_pointless=True):
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"""Commit working copy as a new revision.
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The basic approach is to add all the file texts into the
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store, then the inventory, then make a new revision pointing
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to that inventory and store that.
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This is not quite safe if the working copy changes during the
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commit; for the moment that is simply not allowed. A better
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approach is to make a temporary copy of the files before
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computing their hashes, and then add those hashes in turn to
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the inventory. This should mean at least that there are no
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broken hash pointers. There is no way we can get a snapshot
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of the whole directory at an instant. This would also have to
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be robust against files disappearing, moving, etc. So the
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whole thing is a bit hard.
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This raises PointlessCommit if there are no changes, no new merges,
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and allow_pointless is false.
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timestamp -- if not None, seconds-since-epoch for a
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postdated/predated commit.
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specific_files
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If true, commit only those files.
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rev_id
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If set, use this as the new revision id.
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Useful for test or import commands that need to tightly
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control what revisions are assigned. If you duplicate
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a revision id that exists elsewhere it is your own fault.
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If null (default), a time/random revision id is generated.
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"""
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import time, tempfile, re
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from bzrlib.osutils import local_time_offset, username
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from bzrlib.branch import gen_file_id
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from bzrlib.errors import BzrError, PointlessCommit
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from bzrlib.revision import Revision, RevisionReference
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from bzrlib.trace import mutter, note
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from bzrlib.xml import serializer_v4
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branch.lock_write()
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try:
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# First walk over the working inventory; and both update that
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# and also build a new revision inventory. The revision
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# inventory needs to hold the text-id, sha1 and size of the
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# actual file versions committed in the revision. (These are
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# not present in the working inventory.) We also need to
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# detect missing/deleted files, and remove them from the
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# working inventory.
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work_tree = branch.working_tree()
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work_inv = work_tree.inventory
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basis = branch.basis_tree()
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basis_inv = basis.inventory
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if verbose:
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# note('looking for changes...')
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# print 'looking for changes...'
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# disabled; should be done at a higher level
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pass
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pending_merges = branch.pending_merges()
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missing_ids, new_inv, any_changes = \
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_gather_commit(branch,
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work_tree,
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work_inv,
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basis_inv,
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specific_files,
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verbose)
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if not (any_changes or allow_pointless or pending_merges):
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raise PointlessCommit()
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for file_id in missing_ids:
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# Any files that have been deleted are now removed from the
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# working inventory. Files that were not selected for commit
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# are left as they were in the working inventory and ommitted
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# from the revision inventory.
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# have to do this later so we don't mess up the iterator.
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# since parents may be removed before their children we
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# have to test.
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# FIXME: There's probably a better way to do this; perhaps
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# the workingtree should know how to filter itbranch.
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if work_inv.has_id(file_id):
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del work_inv[file_id]
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# XXX: Can we do any better about making interrupted commits change
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# nothing? Perhaps the best approach is to integrate commit of
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# AtomicFiles with releasing the lock on the Branch.
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# TODO: Separate 'prepare' phase where we find a list of potentially
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# committed files. We then can then pause the commit to prompt for a
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# commit message, knowing the summary will be the same as what's
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# actually used for the commit. (But perhaps simpler to simply get
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# the tree status, then use that for a selective commit?)
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# The newly committed revision is going to have a shape corresponding
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# to that of the working inventory. Files that are not in the
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# working tree and that were in the predecessor are reported as
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# removed --- this can include files that were either removed from the
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# inventory or deleted in the working tree. If they were only
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# deleted from disk, they are removed from the working inventory.
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# We then consider the remaining entries, which will be in the new
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# version. Directory entries are simply copied across. File entries
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# must be checked to see if a new version of the file should be
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# recorded. For each parent revision inventory, we check to see what
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# version of the file was present. If the file was present in at
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# least one tree, and if it was the same version in all the trees,
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# then we can just refer to that version. Otherwise, a new version
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# representing the merger of the file versions must be added.
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# TODO: Update hashcache before and after - or does the WorkingTree
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# look after that?
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# This code requires all merge parents to be present in the branch.
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# We could relax this but for the sake of simplicity the constraint is
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# here for now. It's not totally clear to me how we'd know which file
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# need new text versions if some parents are absent. -- mbp 20050915
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# TODO: Rather than mashing together the ancestry and storing it back,
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# perhaps the weave should have single method which does it all in one
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# go, avoiding a lot of redundant work.
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# TODO: Perhaps give a warning if one of the revisions marked as
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# merged is already in the ancestry, and then don't record it as a
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# distinct parent.
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# TODO: If the file is newly merged but unchanged from the version it
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# merges from, then it should still be reported as newly added
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# relative to the basis revision.
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import os
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import re
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import sys
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import time
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import pdb
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from binascii import hexlify
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from cStringIO import StringIO
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from bzrlib.osutils import (local_time_offset, username,
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rand_bytes, compact_date, user_email,
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kind_marker, is_inside_any, quotefn,
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sha_string, sha_strings, sha_file, isdir, isfile,
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split_lines)
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from bzrlib.branch import gen_file_id
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from bzrlib.errors import (BzrError, PointlessCommit,
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HistoryMissing,
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)
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from bzrlib.revision import Revision
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from bzrlib.trace import mutter, note, warning
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from bzrlib.xml5 import serializer_v5
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from bzrlib.inventory import Inventory
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from bzrlib.weave import Weave
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from bzrlib.weavefile import read_weave, write_weave_v5
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from bzrlib.atomicfile import AtomicFile
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def commit(*args, **kwargs):
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"""Commit a new revision to a branch.
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Function-style interface for convenience of old callers.
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New code should use the Commit class instead.
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"""
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## XXX: Remove this in favor of Branch.commit?
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Commit().commit(*args, **kwargs)
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class NullCommitReporter(object):
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"""I report on progress of a commit."""
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def added(self, path):
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pass
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def removed(self, path):
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pass
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def renamed(self, old_path, new_path):
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pass
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class ReportCommitToLog(NullCommitReporter):
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def added(self, path):
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note('added %s', path)
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def removed(self, path):
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note('removed %s', path)
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def renamed(self, old_path, new_path):
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note('renamed %s => %s', old_path, new_path)
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class Commit(object):
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"""Task of committing a new revision.
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This is a MethodObject: it accumulates state as the commit is
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prepared, and then it is discarded. It doesn't represent
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historical revisions, just the act of recording a new one.
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missing_ids
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Modified to hold a list of files that have been deleted from
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the working directory; these should be removed from the
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working inventory.
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"""
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def __init__(self,
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reporter=None):
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if reporter is not None:
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self.reporter = reporter
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else:
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self.reporter = NullCommitReporter()
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def commit(self,
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branch, message,
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timestamp=None,
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timezone=None,
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committer=None,
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specific_files=None,
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rev_id=None,
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allow_pointless=True,
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verbose=False):
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"""Commit working copy as a new revision.
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timestamp -- if not None, seconds-since-epoch for a
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postdated/predated commit.
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specific_files -- If true, commit only those files.
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rev_id -- If set, use this as the new revision id.
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Useful for test or import commands that need to tightly
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control what revisions are assigned. If you duplicate
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a revision id that exists elsewhere it is your own fault.
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If null (default), a time/random revision id is generated.
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allow_pointless -- If true (default), commit even if nothing
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has changed and no merges are recorded.
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"""
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mutter('preparing to commit')
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self.branch = branch
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self.weave_store = branch.weave_store
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self.rev_id = rev_id
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self.specific_files = specific_files
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self.allow_pointless = allow_pointless
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if timestamp is None:
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self.timestamp = time.time()
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else:
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self.timestamp = long(timestamp)
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if rev_id is None:
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rev_id = _gen_revision_id(branch, time.time())
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inv_id = rev_id
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inv_tmp = tempfile.TemporaryFile()
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serializer_v4.write_inventory(new_inv, inv_tmp)
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inv_tmp.seek(0)
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branch.inventory_store.add(inv_tmp, inv_id)
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mutter('new inventory_id is {%s}' % inv_id)
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# We could also just sha hash the inv_tmp file
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# however, in the case that branch.inventory_store.add()
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# ever actually does anything special
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inv_sha1 = branch.get_inventory_sha1(inv_id)
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branch._write_inventory(work_inv)
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if timestamp == None:
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timestamp = time.time()
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if committer == None:
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committer = username(branch)
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if timezone == None:
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timezone = local_time_offset()
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mutter("building commit log message")
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self.rev_id = _gen_revision_id(self.branch, self.timestamp)
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else:
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self.rev_id = rev_id
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if committer is None:
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self.committer = username(self.branch)
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else:
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assert isinstance(committer, basestring), type(committer)
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self.committer = committer
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if timezone is None:
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self.timezone = local_time_offset()
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else:
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self.timezone = int(timezone)
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assert isinstance(message, basestring), type(message)
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self.message = message
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self._escape_commit_message()
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self.branch.lock_write()
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try:
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self.work_tree = self.branch.working_tree()
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self.work_inv = self.work_tree.inventory
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self.basis_tree = self.branch.basis_tree()
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self.basis_inv = self.basis_tree.inventory
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self._gather_parents()
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if len(self.parents) > 1 and self.specific_files:
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raise NotImplementedError('selected-file commit of merges is not supported yet')
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self._check_parents_present()
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self._remove_deleted()
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self.new_inv = Inventory()
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self._store_entries()
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self._report_deletes()
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self._set_name_versions()
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if not (self.allow_pointless
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or len(self.parents) > 1
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or self.new_inv != self.basis_inv):
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raise PointlessCommit()
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self._record_inventory()
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self._record_ancestry()
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self._make_revision()
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note('committed r%d {%s}', (self.branch.revno() + 1),
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self.rev_id)
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self.branch.append_revision(self.rev_id)
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self.branch.set_pending_merges([])
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finally:
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self.branch.unlock()
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def _record_inventory(self):
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"""Store the inventory for the new revision."""
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inv_text = serializer_v5.write_inventory_to_string(self.new_inv)
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self.inv_sha1 = sha_string(inv_text)
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s = self.branch.control_weaves
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s.add_text('inventory', self.rev_id,
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split_lines(inv_text), self.parents)
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def _escape_commit_message(self):
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"""Replace xml-incompatible control characters."""
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# Python strings can include characters that can't be
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# represented in well-formed XML; escape characters that
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# aren't listed in the XML specification
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# (http://www.w3.org/TR/REC-xml/#NT-Char).
151
if isinstance(message, unicode):
253
if isinstance(self.message, unicode):
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char_pattern = u'[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]'
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else:
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# Use a regular 'str' as pattern to avoid having re.subn
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# return 'unicode' results.
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char_pattern = '[^x09\x0A\x0D\x20-\xFF]'
157
message, escape_count = re.subn(
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self.message, escape_count = re.subn(
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char_pattern,
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lambda match: match.group(0).encode('unicode_escape'),
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message)
262
self.message)
161
263
if escape_count:
162
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note("replaced %d control characters in message", escape_count)
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rev = Revision(timestamp=timestamp,
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timezone=timezone,
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committer=committer,
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message = message,
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inventory_id=inv_id,
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inventory_sha1=inv_sha1,
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revision_id=rev_id)
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rev.parents = []
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precursor_id = branch.last_patch()
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def _record_ancestry(self):
267
"""Append merged revision ancestry to the ancestry file.
268
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This should be the merged ancestry of all parents, plus the
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new revision id."""
271
s = self.branch.control_weaves
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w = s.get_weave_or_empty('ancestry')
273
lines = self._make_ancestry(w)
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w.add(self.rev_id, self.parents, lines)
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s.put_weave('ancestry', w)
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def _make_ancestry(self, ancestry_weave):
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"""Return merged ancestry lines.
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The lines are revision-ids followed by newlines."""
282
parent_ancestries = [ancestry_weave.get(p) for p in self.parents]
283
new_lines = merge_ancestry_lines(self.rev_id, parent_ancestries)
284
mutter('merged ancestry of {%s}:\n%s', self.rev_id, ''.join(new_lines))
285
return new_lines
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def _gather_parents(self):
289
pending_merges = self.branch.pending_merges()
290
self.parents = []
291
self.parent_trees = []
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precursor_id = self.branch.last_revision()
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if precursor_id:
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precursor_sha1 = branch.get_revision_sha1(precursor_id)
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rev.parents.append(RevisionReference(precursor_id, precursor_sha1))
176
for merge_rev in pending_merges:
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rev.parents.append(RevisionReference(merge_rev))
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rev_tmp = tempfile.TemporaryFile()
180
serializer_v4.write_revision(rev, rev_tmp)
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self.parents.append(precursor_id)
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self.parent_trees.append(self.basis_tree)
296
self.parents += pending_merges
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self.parent_trees.extend(map(self.branch.revision_tree, pending_merges))
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299
300
def _check_parents_present(self):
301
for parent_id in self.parents:
302
mutter('commit parent revision {%s}', parent_id)
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if not self.branch.has_revision(parent_id):
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warning("can't commit a merge from an absent parent")
305
raise HistoryMissing(self.branch, 'revision', parent_id)
306
307
308
def _make_revision(self):
309
"""Record a new revision object for this commit."""
310
self.rev = Revision(timestamp=self.timestamp,
311
timezone=self.timezone,
312
committer=self.committer,
313
message=self.message,
314
inventory_sha1=self.inv_sha1,
315
revision_id=self.rev_id)
316
self.rev.parent_ids = self.parents
317
rev_tmp = StringIO()
318
serializer_v5.write_revision(self.rev, rev_tmp)
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rev_tmp.seek(0)
182
branch.revision_store.add(rev_tmp, rev_id)
183
mutter("new revision_id is {%s}" % rev_id)
184
185
## XXX: Everything up to here can simply be orphaned if we abort
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## the commit; it will leave junk files behind but that doesn't
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## matter.
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## TODO: Read back the just-generated changeset, and make sure it
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## applies and recreates the right state.
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## TODO: Also calculate and store the inventory SHA1
193
mutter("committing patch r%d" % (branch.revno() + 1))
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branch.append_revision(rev_id)
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branch.set_pending_merges([])
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if verbose:
200
# disabled; should go through logging
201
# note("commited r%d" % branch.revno())
202
# print ("commited r%d" % branch.revno())
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pass
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finally:
205
branch.unlock()
206
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self.branch.revision_store.add(rev_tmp, self.rev_id, compressed=True)
321
mutter('new revision_id is {%s}', self.rev_id)
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def _remove_deleted(self):
325
"""Remove deleted files from the working inventories.
326
327
This is done prior to taking the working inventory as the
328
basis for the new committed inventory.
329
330
This returns true if any files
331
*that existed in the basis inventory* were deleted.
332
Files that were added and deleted
333
in the working copy don't matter.
334
"""
335
specific = self.specific_files
336
deleted_ids = []
337
for path, ie in self.work_inv.iter_entries():
338
if specific and not is_inside_any(specific, path):
339
continue
340
if not self.work_tree.has_filename(path):
341
note('missing %s', path)
342
deleted_ids.append(ie.file_id)
343
if deleted_ids:
344
for file_id in deleted_ids:
345
del self.work_inv[file_id]
346
self.branch._write_inventory(self.work_inv)
347
348
349
def _find_file_parents(self, file_id):
350
"""Return the text versions and hashes for all file parents.
351
352
Returned as a map from text version to inventory entry.
353
354
This is a set containing the file versions in all parents
355
revisions containing the file. If the file is new, the set
356
will be empty."""
357
r = {}
358
for tree in self.parent_trees:
359
if file_id in tree.inventory:
360
ie = tree.inventory[file_id]
361
assert ie.kind == 'file'
362
assert ie.file_id == file_id
363
if ie.text_version in r:
364
assert r[ie.text_version] == ie
365
else:
366
r[ie.text_version] = ie
367
return r
368
369
370
def _set_name_versions(self):
371
"""Pass over inventory and mark new entry version as needed.
372
373
Files get a new name version when they are new, have a
374
different parent, or a different name from in the
375
basis inventory, or if the file is in a different place
376
to any of the parents."""
377
# XXX: Need to think more here about when the user has
378
# made a specific decision on a particular value -- c.f.
379
# mark-merge.
380
for path, ie in self.new_inv.iter_entries():
381
old_version = None
382
file_id = ie.file_id
383
for parent_tree in self.parent_trees:
384
parent_inv = parent_tree.inventory
385
if file_id not in parent_inv:
386
continue
387
parent_ie = parent_inv[file_id]
388
if parent_ie.parent_id != ie.parent_id:
389
old_version = None
390
break
391
elif parent_ie.name != ie.name:
392
old_version = None
393
break
394
elif old_version is None:
395
old_version = parent_ie.name_version
396
elif old_version != parent_ie.name_version:
397
old_version = None
398
break
399
else:
400
pass # so far so good
401
if old_version is None:
402
mutter('new name_version for {%s}', file_id)
403
ie.name_version = self.rev_id
404
else:
405
mutter('name_version for {%s} inherited as {%s}',
406
file_id, old_version)
407
ie.name_version = old_version
408
409
410
def _store_entries(self):
411
"""Build revision inventory and store modified files.
412
413
This is called with new_inv a new empty inventory. Depending on
414
which files are selected for commit, and which ones have
415
been modified or merged, new inventory entries are built
416
based on the working and parent inventories.
417
418
As a side-effect this stores new text versions for committed
419
files with text changes or merges.
420
421
Each entry can have one of several things happen:
422
423
carry_file -- carried from the previous version (if not
424
selected for commit)
425
426
commit_nonfile -- no text to worry about
427
428
commit_old_text -- same text, may have moved
429
430
commit_file -- new text version
431
"""
432
for path, new_ie in self.work_inv.iter_entries():
433
file_id = new_ie.file_id
434
mutter('check %s {%s}', path, new_ie.file_id)
435
if self.specific_files:
436
if not is_inside_any(self.specific_files, path):
437
mutter('%s not selected for commit', path)
438
self._carry_file(file_id)
439
continue
440
if new_ie.kind != 'file':
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self._commit_nonfile(file_id)
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continue
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file_parents = self._find_file_parents(file_id)
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mutter('parents of %s are %r', path, file_parents)
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if len(file_parents) == 1:
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parent_ie = file_parents.values()[0]
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wc_sha1 = self.work_tree.get_file_sha1(file_id)
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if parent_ie.text_sha1 == wc_sha1:
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# text not changed or merged
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self._commit_old_text(file_id, parent_ie)
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continue
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# file is either new, or a file merge; need to record
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# a new version
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if len(file_parents) > 1:
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note('merged %s', path)
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elif len(file_parents) == 0:
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note('added %s', path)
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else:
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note('modified %s', path)
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self._commit_file(new_ie, file_id, file_parents)
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463
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def _commit_nonfile(self, file_id):
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self.new_inv.add(self.work_inv[file_id].copy())
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467
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def _carry_file(self, file_id):
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"""Carry the file unchanged from the basis revision."""
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if self.basis_inv.has_id(file_id):
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self.new_inv.add(self.basis_inv[file_id].copy())
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473
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def _commit_old_text(self, file_id, parent_ie):
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"""Keep the same text as last time, but possibly a different name."""
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ie = self.work_inv[file_id].copy()
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ie.text_version = parent_ie.text_version
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ie.text_size = parent_ie.text_size
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ie.text_sha1 = parent_ie.text_sha1
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self.new_inv.add(ie)
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482
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def _report_deletes(self):
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for file_id in self.basis_inv:
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if file_id not in self.new_inv:
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note('deleted %s', self.basis_inv.id2path(file_id))
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488
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def _commit_file(self, new_ie, file_id, file_parents):
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mutter('store new text for {%s} in revision {%s}',
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file_id, self.rev_id)
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new_lines = self.work_tree.get_file(file_id).readlines()
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self._add_text_to_weave(file_id, new_lines, file_parents)
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new_ie.text_version = self.rev_id
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new_ie.text_sha1 = sha_strings(new_lines)
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new_ie.text_size = sum(map(len, new_lines))
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self.new_inv.add(new_ie)
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499
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def _add_text_to_weave(self, file_id, new_lines, parents):
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self.weave_store.add_text(file_id, self.rev_id, new_lines, parents)
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502
208
503
209
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def _gen_revision_id(branch, when):
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505
"""Return new revision-id."""
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from binascii import hexlify
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from bzrlib.osutils import rand_bytes, compact_date, user_email
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214
506
s = '%s-%s-' % (user_email(branch), compact_date(when))
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507
s += hexlify(rand_bytes(8))
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508
return s
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509
218
510
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def _gather_commit(branch, work_tree, work_inv, basis_inv, specific_files,
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verbose):
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"""Build inventory preparatory to commit.
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223
Returns missing_ids, new_inv, any_changes.
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225
This adds any changed files into the text store, and sets their
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test-id, sha and size in the returned inventory appropriately.
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228
missing_ids
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Modified to hold a list of files that have been deleted from
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the working directory; these should be removed from the
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working inventory.
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512
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def merge_ancestry_lines(rev_id, ancestries):
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"""Return merged ancestry lines.
515
516
rev_id -- id of the new revision
517
518
ancestries -- a sequence of ancestries for parent revisions,
519
as newline-terminated line lists.
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520
"""
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from bzrlib.inventory import Inventory
234
from bzrlib.osutils import isdir, isfile, sha_string, quotefn, \
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local_time_offset, username, kind_marker, is_inside_any
236
237
from bzrlib.branch import gen_file_id
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from bzrlib.errors import BzrError
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from bzrlib.revision import Revision
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from bzrlib.trace import mutter, note
241
242
any_changes = False
243
inv = Inventory(work_inv.root.file_id)
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missing_ids = []
245
246
for path, entry in work_inv.iter_entries():
247
## TODO: Check that the file kind has not changed from the previous
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## revision of this file (if any).
249
250
p = branch.abspath(path)
251
file_id = entry.file_id
252
mutter('commit prep file %s, id %r ' % (p, file_id))
253
254
if specific_files and not is_inside_any(specific_files, path):
255
mutter(' skipping file excluded from commit')
256
if basis_inv.has_id(file_id):
257
# carry over with previous state
258
inv.add(basis_inv[file_id].copy())
259
else:
260
# omit this from committed inventory
261
pass
262
continue
263
264
if not work_tree.has_id(file_id):
265
if verbose:
266
print('deleted %s%s' % (path, kind_marker(entry.kind)))
267
any_changes = True
268
mutter(" file is missing, removing from inventory")
269
missing_ids.append(file_id)
270
continue
271
272
# this is present in the new inventory; may be new, modified or
273
# unchanged.
274
old_ie = basis_inv.has_id(file_id) and basis_inv[file_id]
275
276
entry = entry.copy()
277
inv.add(entry)
278
279
if old_ie:
280
old_kind = old_ie.kind
281
if old_kind != entry.kind:
282
raise BzrError("entry %r changed kind from %r to %r"
283
% (file_id, old_kind, entry.kind))
284
285
if entry.kind == 'directory':
286
if not isdir(p):
287
raise BzrError("%s is entered as directory but not a directory"
288
% quotefn(p))
289
elif entry.kind == 'file':
290
if not isfile(p):
291
raise BzrError("%s is entered as file but is not a file" % quotefn(p))
292
293
new_sha1 = work_tree.get_file_sha1(file_id)
294
295
if (old_ie
296
and old_ie.text_sha1 == new_sha1):
297
## assert content == basis.get_file(file_id).read()
298
entry.text_id = old_ie.text_id
299
entry.text_sha1 = new_sha1
300
entry.text_size = old_ie.text_size
301
mutter(' unchanged from previous text_id {%s}' %
302
entry.text_id)
303
else:
304
content = file(p, 'rb').read()
305
306
# calculate the sha again, just in case the file contents
307
# changed since we updated the cache
308
entry.text_sha1 = sha_string(content)
309
entry.text_size = len(content)
310
311
entry.text_id = gen_file_id(entry.name)
312
branch.text_store.add(content, entry.text_id)
313
mutter(' stored with text_id {%s}' % entry.text_id)
314
315
if verbose:
316
marked = path + kind_marker(entry.kind)
317
if not old_ie:
318
print 'added', marked
319
any_changes = True
320
elif old_ie == entry:
321
pass # unchanged
322
elif (old_ie.name == entry.name
323
and old_ie.parent_id == entry.parent_id):
324
print 'modified', marked
325
any_changes = True
326
else:
327
print 'renamed', marked
328
any_changes = True
329
elif old_ie != entry:
330
any_changes = True
331
332
return missing_ids, inv, any_changes
333
334
521
if len(ancestries) == 0:
522
return [rev_id + '\n']
523
seen = set(ancestries[0])
524
ancs = ancestries[0][:]
525
for parent_ancestry in ancestries[1:]:
526
for line in parent_ancestry:
527
assert line[-1] == '\n'
528
if line not in seen:
529
ancs.append(line)
530
seen.add(line)
531
r = rev_id + '\n'
532
assert r not in seen
533
ancs.append(r)
534
return ancs
Loggerhead is a web-based interface for Breezy
Version: 2.0.1