Mercurial > hg > hg-fastimport

comparison hgext3rd/fastimport/vendor/python_fastimport/reftracker.py @ 86:28704a2a7461 vendor/python-fastimport

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Import python-fastimport-0.9.8
author Roy Marples <roy@marples.name>
date Tue, 19 Jan 2021 22:56:34 +0000
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85:1f5544a8870b 86:28704a2a7461
1 # Copyright (C) 2009 Canonical Ltd
2 #
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 2 of the License, or
6 # (at your option) any later version.
7 #
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
12 #
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
15
16
17 """Tracker of refs."""
18
19 from __future__ import absolute_import
20
21
22 class RefTracker(object):
23
24 def __init__(self):
25 # Head tracking: last ref, last id per ref & map of commit ids to ref*s*
26 self.last_ref = None
27 self.last_ids = {}
28 self.heads = {}
29
30 def dump_stats(self, note):
31 self._show_stats_for(self.last_ids, "last-ids", note=note)
32 self._show_stats_for(self.heads, "heads", note=note)
33
34 def clear(self):
35 self.last_ids.clear()
36 self.heads.clear()
37
38 def track_heads(self, cmd):
39 """Track the repository heads given a CommitCommand.
40
41 :param cmd: the CommitCommand
42 :return: the list of parents in terms of commit-ids
43 """
44 # Get the true set of parents
45 if cmd.from_ is not None:
46 parents = [cmd.from_]
47 else:
48 last_id = self.last_ids.get(cmd.ref)
49 if last_id is not None:
50 parents = [last_id]
51 else:
52 parents = []
53 parents.extend(cmd.merges)
54
55 # Track the heads
56 self.track_heads_for_ref(cmd.ref, cmd.id, parents)
57 return parents
58
59 def track_heads_for_ref(self, cmd_ref, cmd_id, parents=None):
60 if parents is not None:
61 for parent in parents:
62 if parent in self.heads:
63 del self.heads[parent]
64 self.heads.setdefault(cmd_id, set()).add(cmd_ref)
65 self.last_ids[cmd_ref] = cmd_id
66 self.last_ref = cmd_ref
67
68