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  • Committer: Robert Collins
  • Date: 2010-05-06 11:08:10 UTC
  • mto: This revision was merged to the branch mainline in revision 5223.
  • Revision ID: robertc@robertcollins.net-20100506110810-h3j07fh5gmw54s25
Cleaner matcher matching revised unlocking protocol.

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push.py
1
 
# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
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, write to the Free Software
15
 
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16
 
 
17
 
"""Push implementation that simply prints message saying push is not supported."""
18
 
 
19
 
from bzrlib import (
20
 
    errors,
21
 
    ui,
22
 
    )
23
 
from bzrlib.repository import (
24
 
    InterRepository,
25
 
    )
26
 
from bzrlib.revision import (
27
 
    NULL_REVISION,
28
 
    )
29
 
 
30
 
from bzrlib.plugins.git.errors import (
31
 
    NoPushSupport,
32
 
    )
33
 
from bzrlib.plugins.git.object_store import (
34
 
    BazaarObjectStore,
35
 
    )
36
 
from bzrlib.plugins.git.repository import (
37
 
    GitRepository,
38
 
    LocalGitRepository,
39
 
    GitRepositoryFormat,
40
 
    )
41
 
from bzrlib.plugins.git.remote import (
42
 
    RemoteGitRepository,
43
 
    )
44
 
 
45
 
 
46
 
class MissingObjectsIterator(object):
47
 
    """Iterate over git objects that are missing from a target repository.
48
 
 
49
 
    """
50
 
 
51
 
    def __init__(self, store, source, pb=None):
52
 
        """Create a new missing objects iterator.
53
 
 
54
 
        """
55
 
        self.source = source
56
 
        self._object_store = store
57
 
        self._pending = []
58
 
        self.pb = pb
59
 
 
60
 
    def import_revisions(self, revids):
61
 
        for i, revid in enumerate(revids):
62
 
            if self.pb:
63
 
                self.pb.update("pushing revisions", i, len(revids))
64
 
            git_commit = self.import_revision(revid)
65
 
            yield (revid, git_commit)
66
 
 
67
 
    def import_revision(self, revid):
68
 
        """Import the gist of a revision into this Git repository.
69
 
 
70
 
        """
71
 
        tree = self._object_store.tree_cache.revision_tree(revid)
72
 
        rev = self.source.get_revision(revid)
73
 
        commit = None
74
 
        for path, obj, ie in self._object_store._revision_to_objects(rev, tree):
75
 
            if obj.type_name == "commit":
76
 
                commit = obj
77
 
            self._pending.append((obj, path))
78
 
        return commit.id
79
 
 
80
 
    def __len__(self):
81
 
        return len(self._pending)
82
 
 
83
 
    def __iter__(self):
84
 
        return iter(self._pending)
85
 
 
86
 
 
87
 
class InterToGitRepository(InterRepository):
88
 
    """InterRepository that copies into a Git repository."""
89
 
 
90
 
    _matching_repo_format = GitRepositoryFormat()
91
 
 
92
 
    def __init__(self, source, target):
93
 
        super(InterToGitRepository, self).__init__(source, target)
94
 
        self.mapping = self.target.get_mapping()
95
 
        self.source_store = BazaarObjectStore(self.source, self.mapping)
96
 
 
97
 
    @staticmethod
98
 
    def _get_repo_format_to_test():
99
 
        return None
100
 
 
101
 
    def copy_content(self, revision_id=None, pb=None):
102
 
        """See InterRepository.copy_content."""
103
 
        self.fetch(revision_id, pb, find_ghosts=False)
104
 
 
105
 
    def fetch(self, revision_id=None, pb=None, find_ghosts=False,
106
 
            fetch_spec=None):
107
 
        raise NoPushSupport()
108
 
 
109
 
 
110
 
class InterToLocalGitRepository(InterToGitRepository):
111
 
 
112
 
    def missing_revisions(self, stop_revisions, check_revid):
113
 
        missing = []
114
 
        pb = ui.ui_factory.nested_progress_bar()
115
 
        try:
116
 
            graph = self.source.get_graph()
117
 
            for revid, _ in graph.iter_ancestry(stop_revisions):
118
 
                pb.update("determining revisions to fetch", len(missing))
119
 
                if not check_revid(revid):
120
 
                    missing.append(revid)
121
 
            return graph.iter_topo_order(missing)
122
 
        finally:
123
 
            pb.finished()
124
 
 
125
 
    def dfetch_refs(self, refs):
126
 
        old_refs = self.target._git.get_refs()
127
 
        new_refs = {}
128
 
        revidmap, gitidmap = self.dfetch(refs.values())
129
 
        for name, revid in refs.iteritems():
130
 
            if revid in gitidmap:
131
 
                gitid = gitidmap[revid]
132
 
            else:
133
 
                gitid = self.source_store._lookup_revision_sha1(revid)
134
 
            self.target._git.refs[name] = gitid
135
 
            new_refs[name] = gitid
136
 
        return revidmap, old_refs, new_refs
137
 
 
138
 
    def dfetch(self, stop_revisions):
139
 
        """Import the gist of the ancestry of a particular revision."""
140
 
        gitidmap = {}
141
 
        revidmap = {}
142
 
        self.source.lock_read()
143
 
        try:
144
 
            target_store = self.target._git.object_store
145
 
            def check_revid(revid):
146
 
                if revid == NULL_REVISION:
147
 
                    return True
148
 
                try:
149
 
                    return (self.source_store._lookup_revision_sha1(revid) in target_store)
150
 
                except errors.NoSuchRevision:
151
 
                    # Ghost, can't dpush
152
 
                    return True
153
 
            todo = list(self.missing_revisions(stop_revisions, check_revid))
154
 
            pb = ui.ui_factory.nested_progress_bar()
155
 
            try:
156
 
                object_generator = MissingObjectsIterator(self.source_store, self.source, pb)
157
 
                for old_bzr_revid, git_commit in object_generator.import_revisions(
158
 
                    todo):
159
 
                    new_bzr_revid = self.mapping.revision_id_foreign_to_bzr(git_commit)
160
 
                    revidmap[old_bzr_revid] = new_bzr_revid
161
 
                    gitidmap[old_bzr_revid] = git_commit
162
 
                target_store.add_objects(object_generator)
163
 
            finally:
164
 
                pb.finished()
165
 
        finally:
166
 
            self.source.unlock()
167
 
        return revidmap, gitidmap
168
 
 
169
 
    @staticmethod
170
 
    def is_compatible(source, target):
171
 
        """Be compatible with GitRepository."""
172
 
        return (not isinstance(source, GitRepository) and
173
 
                isinstance(target, LocalGitRepository))
174
 
 
175
 
 
176
 
class InterToRemoteGitRepository(InterToGitRepository):
177
 
 
178
 
    def dfetch_refs(self, new_refs):
179
 
        """Import the gist of the ancestry of a particular revision."""
180
 
        revidmap = {}
181
 
        old_refs = {}
182
 
        def determine_wants(refs):
183
 
            ret = {}
184
 
            old_refs.update(new_refs)
185
 
            for name, revid in new_refs.iteritems():
186
 
                ret[name] = self.source_store._lookup_revision_sha1(revid)
187
 
            return ret
188
 
        self.source.lock_read()
189
 
        try:
190
 
            new_refs = self.target.send_pack(determine_wants,
191
 
                    self.source_store.generate_pack_contents)
192
 
        finally:
193
 
            self.source.unlock()
194
 
        return revidmap, old_refs, new_refs
195
 
 
196
 
    @staticmethod
197
 
    def is_compatible(source, target):
198
 
        """Be compatible with GitRepository."""
199
 
        return (not isinstance(source, GitRepository) and
200
 
                isinstance(target, RemoteGitRepository))