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  • Committer: Jelmer Vernooij
  • Date: 2009-09-10 13:13:15 UTC
  • mto: (0.200.602 trunk)
  • mto: This revision was merged to the branch mainline in revision 6960.
  • Revision ID: jelmer@samba.org-20090910131315-6890xg58pl2jseml
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push.py
1
 
# Copyright (C) 2009-2010 Jelmer Vernooij <jelmer@samba.org>
 
1
# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
2
2
#
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
20
20
    errors,
21
21
    ui,
22
22
    )
23
 
from bzrlib.graph import (
24
 
    PendingAncestryResult,
25
 
    )
26
23
from bzrlib.repository import (
27
24
    InterRepository,
28
25
    )
33
30
from bzrlib.plugins.git.errors import (
34
31
    NoPushSupport,
35
32
    )
 
33
from bzrlib.plugins.git.mapping import (
 
34
    extract_unusual_modes,
 
35
    )
36
36
from bzrlib.plugins.git.object_store import (
37
37
    BazaarObjectStore,
38
38
    )
57
57
        """
58
58
        self.source = source
59
59
        self._object_store = store
 
60
        self._revids = set()
 
61
        self._sent_shas = set()
60
62
        self._pending = []
61
63
        self.pb = pb
62
64
 
63
 
    def import_revisions(self, revids, roundtrip):
64
 
        """Import a set of revisions into this git repository.
65
 
 
66
 
        :param revids: Revision ids of revisions to import
67
 
        :param roundtrip: Whether to roundtrip bzr metadata
68
 
        """
 
65
    def import_revisions(self, revids):
 
66
        self._revids.update(revids)
69
67
        for i, revid in enumerate(revids):
70
68
            if self.pb:
71
69
                self.pb.update("pushing revisions", i, len(revids))
72
 
            git_commit = self.import_revision(revid, roundtrip)
 
70
            git_commit = self.import_revision(revid)
73
71
            yield (revid, git_commit)
74
72
 
75
 
    def import_revision(self, revid, roundtrip):
76
 
        """Import a revision into this Git repository.
77
 
 
78
 
        :param revid: Revision id of the revision
79
 
        :param roundtrip: Whether to roundtrip bzr metadata
 
73
    def need_sha(self, sha):
 
74
        if sha is None or sha in self._sent_shas:
 
75
            return False
 
76
        (type, (fileid, revid)) = self._object_store._idmap.lookup_git_sha(sha)
 
77
        assert type in ("blob", "tree")
 
78
        if revid in self._revids:
 
79
            # Not sent yet, and part of the set of revisions to send
 
80
            return True
 
81
        # Not changed in the revisions to send, so either not necessary
 
82
        # or already present remotely (as git doesn't do ghosts)
 
83
        return False
 
84
 
 
85
    def queue(self, sha, obj, path, ie=None, inv=None, unusual_modes=None):
 
86
        if obj is None:
 
87
            # Can't lazy-evaluate directories, since they might be eliminated
 
88
            if ie.kind == "directory":
 
89
                obj = self._object_store._get_ie_object(ie, inv, unusual_modes)
 
90
                if obj is None:
 
91
                    return
 
92
            else:
 
93
                obj = (ie, inv, unusual_modes)
 
94
        self._pending.append((obj, path))
 
95
        self._sent_shas.add(sha)
 
96
 
 
97
    def import_revision(self, revid):
 
98
        """Import the gist of a revision into this Git repository.
 
99
 
80
100
        """
81
 
        tree = self._object_store.tree_cache.revision_tree(revid)
 
101
        inv = self.source.get_inventory(revid)
82
102
        rev = self.source.get_revision(revid)
83
 
        commit = None
84
 
        for path, obj, ie in self._object_store._revision_to_objects(rev, tree,
85
 
            roundtrip):
86
 
            if obj.type_name == "commit":
87
 
                commit = obj
88
 
            self._pending.append((obj, path))
 
103
        unusual_modes = extract_unusual_modes(rev)
 
104
        todo = [inv.root]
 
105
        tree_sha = None
 
106
        while todo:
 
107
            ie = todo.pop()
 
108
            (sha, object) = self._object_store._get_ie_object_or_sha1(ie, inv, unusual_modes)
 
109
            if ie.parent_id is None:
 
110
                tree_sha = sha
 
111
            if not self.need_sha(sha):
 
112
                continue
 
113
            self.queue(sha, object, inv.id2path(ie.file_id), ie, inv, unusual_modes)
 
114
            if ie.kind == "directory":
 
115
                todo.extend(ie.children.values())
 
116
        assert tree_sha is not None
 
117
        commit = self._object_store._get_commit(rev, tree_sha)
 
118
        self.queue(commit.id, commit, None, None)
89
119
        return commit.id
90
120
 
91
121
    def __len__(self):
92
122
        return len(self._pending)
93
123
 
94
124
    def __iter__(self):
95
 
        return iter(self._pending)
 
125
        for i, (object, path) in enumerate(self._pending):
 
126
            if self.pb:
 
127
                self.pb.update("writing pack objects", i, len(self))
 
128
            if isinstance(object, tuple):
 
129
                object = self._object_store._get_ie_object(*object)
 
130
            yield (object, path)   
96
131
 
97
132
 
98
133
class InterToGitRepository(InterRepository):
113
148
        """See InterRepository.copy_content."""
114
149
        self.fetch(revision_id, pb, find_ghosts=False)
115
150
 
116
 
    def dfetch_refs(self, update_refs):
117
 
        """Fetch non-roundtripped revisions into the target repository.
118
 
 
119
 
        :param update_refs: Generate refs to fetch. Receives dictionary 
120
 
            with old names to old git shas. Should return a dictionary
121
 
            of new names to Bazaar revision ids.
122
 
        :return: revision id map, old refs dictionary and new refs dictionary
123
 
        """
124
 
        raise NotImplementedError(self.dfetch_refs)
125
 
 
126
 
    def fetch_refs(self, update_refs):
127
 
        """Fetch possibly roundtripped revisions into the target repository.
128
 
 
129
 
        :param update_refs: Generate refs to fetch. Receives dictionary 
130
 
            with old refs (git shas), returns dictionary of new names to 
131
 
            git shas.
132
 
        :return: old refs, new refs
133
 
        """
134
 
        raise NotImplementedError(self.fetch_refs)
 
151
    def fetch(self, revision_id=None, pb=None, find_ghosts=False, 
 
152
            fetch_spec=None):
 
153
        raise NoPushSupport()
135
154
 
136
155
 
137
156
class InterToLocalGitRepository(InterToGitRepository):
138
 
    """InterBranch implementation between a Bazaar and a Git repository."""
139
 
 
140
 
    def __init__(self, source, target):
141
 
        super(InterToLocalGitRepository, self).__init__(source, target)
142
 
        self.target_store = self.target._git.object_store
143
 
        self.target_refs = self.target._git.refs
144
 
 
145
 
    def _revision_needs_fetching(self, revid):
146
 
        if revid == NULL_REVISION:
147
 
            return False
148
 
        try:
149
 
            sha_id = self.source_store._lookup_revision_sha1(revid)
150
 
        except KeyError:
151
 
            raise errors.NoSuchRevision(self.source, revid)
152
 
        try:
153
 
            return (sha_id not in self.target_store)
154
 
        except errors.NoSuchRevision:
155
 
            # Ghost, can't push
156
 
            return False
157
 
 
158
 
    def missing_revisions(self, stop_revisions):
159
 
        """Find the revisions that are missing from the target repository.
160
 
 
161
 
        :param stop_revisions: Revisions to check for
162
 
        :return: sequence of missing revisions, in topological order
163
 
        :raise: NoSuchRevision if the stop_revisions are not present in
164
 
            the source
165
 
        """
 
157
 
 
158
    def missing_revisions(self, stop_revisions, check_revid):
166
159
        missing = []
167
 
        graph = self.source.get_graph()
168
160
        pb = ui.ui_factory.nested_progress_bar()
169
161
        try:
 
162
            graph = self.source.get_graph()
170
163
            for revid, _ in graph.iter_ancestry(stop_revisions):
171
 
                assert type(revid) is str
172
164
                pb.update("determining revisions to fetch", len(missing))
173
 
                if self._revision_needs_fetching(revid):
 
165
                if not check_revid(revid):
174
166
                    missing.append(revid)
 
167
            return graph.iter_topo_order(missing)
175
168
        finally:
176
169
            pb.finished()
177
 
        return graph.iter_topo_order(missing)
178
 
 
179
 
    def _get_target_bzr_refs(self):
180
 
        """Return a dictionary with references.
181
 
 
182
 
        :return: Dictionary with reference names as keys and tuples
183
 
            with Git SHA, Bazaar revid as values.
184
 
        """
185
 
        bzr_refs = {}
186
 
        refs = self.target._git.get_refs()
187
 
        for k, v in refs.iteritems():
188
 
            try:
189
 
                (kind, (revid, treesha)) = self.source_store.lookup_git_sha(v)
190
 
            except KeyError:
191
 
                revid = None
192
 
            bzr_refs[k] = (v, revid)
193
 
        return bzr_refs
194
 
 
195
 
    def fetch_refs(self, update_refs):
196
 
        self.source.lock_read()
197
 
        try:
198
 
            old_refs = self._get_target_bzr_refs()
199
 
            new_refs = update_refs(old_refs)
200
 
            # FIXME: Keep track of already looked up revid<->sha mappings
201
 
            fetch_spec = PendingAncestryResult(
202
 
                [revid for sha, revid in new_refs.values()], self.source)
203
 
            self.fetch(fetch_spec=fetch_spec)
204
 
        finally:
205
 
            self.source.unlock()
206
 
        return old_refs, new_refs
207
 
 
208
 
    def dfetch_refs(self, update_refs):
209
 
        self.source.lock_read()
210
 
        try:
211
 
            old_refs = self._get_target_bzr_refs()
212
 
            new_refs = update_refs(old_refs)
213
 
            revidmap, gitidmap = self.dfetch(new_refs.values())
214
 
            for name, (gitid, revid) in new_refs.iteritems():
215
 
                if gitid is None:
216
 
                    try:
217
 
                        gitid = gitidmap[revid]
218
 
                    except KeyError:
219
 
                        gitid = self.source_store._lookup_revision_sha1(revid)
220
 
                self.target._git.refs[name] = gitid
221
 
                new_refs[name] = (gitid, self.source_store.lookup_git_sha(gitid)[1][0])
222
 
        finally:
223
 
            self.source.unlock()
224
 
        return revidmap, old_refs, new_refs
225
 
 
226
 
    def _get_missing_objects_iterator(self, pb):
227
 
        return MissingObjectsIterator(self.source_store, self.source, pb)
 
170
 
 
171
    def dfetch_refs(self, refs):
 
172
        new_refs = {}
 
173
        revidmap, gitidmap = self.dfetch(refs.values())
 
174
        for name, revid in refs.iteritems():
 
175
            if revid in gitidmap:
 
176
                gitid = gitidmap[revid]
 
177
            else:
 
178
                gitid = self.source_store._lookup_revision_sha1(revid)
 
179
            self.target._git.refs[name] = gitid
 
180
            new_refs[name] = gitid
 
181
        return revidmap, new_refs
228
182
 
229
183
    def dfetch(self, stop_revisions):
230
184
        """Import the gist of the ancestry of a particular revision."""
232
186
        revidmap = {}
233
187
        self.source.lock_read()
234
188
        try:
235
 
            todo = list(self.missing_revisions([revid for sha, revid in stop_revisions]))
 
189
            target_store = self.target._git.object_store
 
190
            def check_revid(revid):
 
191
                if revid == NULL_REVISION:
 
192
                    return True
 
193
                try:
 
194
                    return (self.source_store._lookup_revision_sha1(revid) in target_store)
 
195
                except errors.NoSuchRevision:
 
196
                    # Ghost, can't dpush
 
197
                    return True
 
198
            todo = list(self.missing_revisions(stop_revisions, check_revid))
236
199
            pb = ui.ui_factory.nested_progress_bar()
237
200
            try:
238
 
                object_generator = self._get_missing_objects_iterator(pb)
 
201
                object_generator = MissingObjectsIterator(self.source_store, self.source, pb)
239
202
                for old_bzr_revid, git_commit in object_generator.import_revisions(
240
 
                    todo, roundtrip=False):
 
203
                    todo):
241
204
                    new_bzr_revid = self.mapping.revision_id_foreign_to_bzr(git_commit)
242
205
                    revidmap[old_bzr_revid] = new_bzr_revid
243
206
                    gitidmap[old_bzr_revid] = git_commit
244
 
                self.target_store.add_objects(object_generator)
 
207
                target_store.add_objects(object_generator) 
245
208
            finally:
246
209
                pb.finished()
247
210
        finally:
248
211
            self.source.unlock()
249
212
        return revidmap, gitidmap
250
213
 
251
 
    def fetch(self, revision_id=None, pb=None, find_ghosts=False,
252
 
            fetch_spec=None):
253
 
        if revision_id is not None:
254
 
            stop_revisions = [revision_id]
255
 
        elif fetch_spec is not None:
256
 
            stop_revisions = fetch_spec.heads
257
 
        else:
258
 
            stop_revisions = self.source.all_revision_ids()
259
 
        self.source.lock_read()
260
 
        try:
261
 
            todo = list(self.missing_revisions(stop_revisions))
262
 
            pb = ui.ui_factory.nested_progress_bar()
263
 
            try:
264
 
                object_generator = self._get_missing_objects_iterator(pb)
265
 
                for (revid, git_sha) in object_generator.import_revisions(
266
 
                    todo, roundtrip=True):
267
 
                    try:
268
 
                        self.mapping.revision_id_bzr_to_foreign(revid)
269
 
                    except errors.InvalidRevisionId:
270
 
                        self.target_refs[self.mapping.revid_as_refname(revid)] = git_sha
271
 
                self.target_store.add_objects(object_generator)
272
 
            finally:
273
 
                pb.finished()
274
 
        finally:
275
 
            self.source.unlock()
276
 
 
277
214
    @staticmethod
278
215
    def is_compatible(source, target):
279
216
        """Be compatible with GitRepository."""
280
 
        return (not isinstance(source, GitRepository) and
 
217
        return (not isinstance(source, GitRepository) and 
281
218
                isinstance(target, LocalGitRepository))
282
219
 
283
220
 
284
221
class InterToRemoteGitRepository(InterToGitRepository):
285
222
 
286
 
    def dfetch_refs(self, update_refs):
 
223
    def dfetch_refs(self, new_refs):
287
224
        """Import the gist of the ancestry of a particular revision."""
288
225
        revidmap = {}
289
 
        def determine_wants(old_refs):
 
226
        def determine_wants(refs):
290
227
            ret = {}
291
 
            self.old_refs = old_refs
292
 
            self.new_refs = update_refs(self.old_refs)
293
 
            for name, revid in self.new_refs.iteritems():
 
228
            for name, revid in new_refs.iteritems():
294
229
                ret[name] = self.source_store._lookup_revision_sha1(revid)
295
230
            return ret
296
231
        self.source.lock_read()
297
232
        try:
298
233
            new_refs = self.target.send_pack(determine_wants,
299
 
                    self.source_store.generate_lossy_pack_contents)
 
234
                    self.source_store.generate_pack_contents)
300
235
        finally:
301
236
            self.source.unlock()
302
 
        return revidmap, self.old_refs, self.new_refs
303
 
 
304
 
    def fetch_refs(self, update_refs):
305
 
        raise NoPushSupport()
 
237
        return revidmap, new_refs
306
238
 
307
239
    @staticmethod
308
240
    def is_compatible(source, target):
309
241
        """Be compatible with GitRepository."""
310
 
        return (not isinstance(source, GitRepository) and
 
242
        return (not isinstance(source, GitRepository) and 
311
243
                isinstance(target, RemoteGitRepository))