1
# Copyright (C) 2009 Canonical Ltd
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.
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.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""An object that updates a bunch of branches based on data imported."""
19
from operator import itemgetter
21
from bzrlib import bzrdir, errors
22
from bzrlib.trace import error, note
28
class BranchUpdater(object):
30
def __init__(self, repo, branch, cache_mgr, heads_by_ref, last_ref, tags):
31
"""Create an object responsible for updating branches.
33
:param heads_by_ref: a dictionary where
34
names are git-style references like refs/heads/master;
35
values are one item lists of commits marks.
39
self.cache_mgr = cache_mgr
40
self.heads_by_ref = heads_by_ref
41
self.last_ref = last_ref
43
self.name_mapper = branch_mapper.BranchMapper()
46
"""Update the Bazaar branches and tips matching the heads.
48
If the repository is shared, this routine creates branches
49
as required. If it isn't, warnings are produced about the
52
:return: updated, lost_heads where
53
updated = the list of branches updated
54
lost_heads = a list of (bazaar-name,revision) for branches that
55
would have been created had the repository been shared
58
branch_tips, lost_heads = self._get_matching_branches()
59
for br, tip in branch_tips:
60
if self._update_branch(br, tip):
62
return updated, lost_heads
64
def _get_matching_branches(self):
65
"""Get the Bazaar branches.
67
:return: default_tip, branch_tips, lost_heads where
68
default_tip = the last commit mark for the default branch
69
branch_tips = a list of (branch,tip) tuples for other branches.
70
lost_heads = a list of (bazaar-name,revision) for branches that
71
would have been created had the repository been shared and
76
ref_names = self.heads_by_ref.keys()
77
if self.branch is not None:
78
trunk = self.select_trunk(ref_names)
79
default_tip = self.heads_by_ref[trunk][0]
80
branch_tips.append((self.branch, default_tip))
81
ref_names.remove(trunk)
83
# Convert the reference names into Bazaar speak
84
git_to_bzr_map = self.name_mapper.git_to_bzr(ref_names)
86
# Policy for locating branches
87
def dir_under_current(name, ref_name):
88
# Using the Bazaar name, get a directory under the current one
90
def dir_sister_branch(name, ref_name):
91
# Using the Bazaar name, get a sister directory to the branch
92
return osutils.pathjoin(self.branch.base, "..", name)
93
if self.branch is not None:
94
dir_policy = dir_sister_branch
96
dir_policy = dir_under_current
98
# Create/track missing branches
99
shared_repo = self.repo.is_shared()
100
git_bzr_items = sorted(git_to_bzr_map.items(), key=itemgetter(1))
101
for ref_name, name in git_bzr_items:
102
tip = self.heads_by_ref[ref_name][0]
104
location = dir_policy(name, ref_name)
106
br = self.make_branch(location)
107
branch_tips.append((br,tip))
109
except errors.BzrError, ex:
110
error("ERROR: failed to create branch %s: %s",
112
lost_head = self.cache_mgr.revision_ids[tip]
113
lost_info = (name, lost_head)
114
lost_heads.append(lost_info)
115
return branch_tips, lost_heads
117
def select_trunk(self, ref_names):
118
"""Given a set of ref names, choose one as the trunk."""
119
for candidate in ['refs/heads/master']:
120
if candidate in ref_names:
122
# Use the last reference in the import stream
125
def make_branch(self, location):
126
"""Make a branch in the repository if not already there."""
128
return bzrdir.BzrDir.open(location).open_branch()
129
except errors.NotBranchError, ex:
130
return bzrdir.BzrDir.create_branch_convenience(location)
132
def _update_branch(self, br, last_mark):
133
"""Update a branch with last revision and tag information.
135
:return: whether the branch was changed or not
137
last_rev_id = self.cache_mgr.revision_ids[last_mark]
138
revs = list(self.repo.iter_reverse_revision_history(last_rev_id))
140
existing_revno, existing_last_rev_id = br.last_revision_info()
142
if revno != existing_revno or last_rev_id != existing_last_rev_id:
143
br.set_last_revision_info(revno, last_rev_id)
145
# apply tags known in this branch
148
for tag,rev in self.tags.items():
152
br.tags._set_tag_dict(my_tags)
156
note("\t branch %s now has %d %s and %d %s", br.nick,
157
revno, helpers.single_plural(revno, "revision", "revisions"),
158
tagno, helpers.single_plural(tagno, "tag", "tags"))
added
removed
branch_updater.py
