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Add description of git-v1 mapping.

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repository.py
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# Copyright (C) 2007 Canonical Ltd
 
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# Copyright (C) 2008-2009 Jelmer Vernooij <jelmer@samba.org>
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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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"""An adapter between a Git Repository and a Bazaar Branch"""
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19
 
19
 
import os
20
 
import time
21
 
 
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20
import bzrlib
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from bzrlib import (
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    deprecated_graph,
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22
    errors,
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23
    graph,
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24
    inventory,
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    repository,
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    revision,
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    revisiontree,
 
29
    ui,
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30
    urlutils,
33
 
    versionedfile,
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31
    )
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32
from bzrlib.foreign import (
36
 
        ForeignRepository,
37
 
        )
38
 
from bzrlib.trace import mutter
39
 
from bzrlib.transport import get_transport
 
33
    ForeignRepository,
 
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    )
 
35
from bzrlib.trace import (
 
36
    mutter,
 
37
    )
 
38
from bzrlib.transport import (
 
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    get_transport,
 
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    )
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41
 
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from bzrlib.plugins.git.foreign import (
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    versionedfiles,
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    )
44
 
from bzrlib.plugins.git.mapping import default_mapping
 
45
from bzrlib.plugins.git.mapping import (
 
46
    default_mapping,
 
47
    inventory_to_tree_and_blobs,
 
48
    mapping_registry,
 
49
    revision_to_commit,
 
50
    )
 
51
from bzrlib.plugins.git.versionedfiles import (
 
52
    GitTexts,
 
53
    )
45
54
 
46
 
from bzrlib.plugins.git import git
 
55
import dulwich as git
 
56
import os
 
57
import time
47
58
 
48
59
 
49
60
class GitTags(object):
61
72
    _serializer = None
62
73
 
63
74
    def __init__(self, gitdir, lockfiles):
64
 
        ForeignRepository.__init__(self, GitFormat(), gitdir, lockfiles)
65
 
        from bzrlib.plugins.git import fetch
66
 
        repository.InterRepository.register_optimiser(fetch.InterGitRepository)
 
75
        ForeignRepository.__init__(self, GitRepositoryFormat(), gitdir, 
 
76
            lockfiles)
 
77
        from bzrlib.plugins.git import fetch, push
 
78
        for optimiser in [fetch.InterRemoteGitNonGitRepository, 
 
79
                          fetch.InterLocalGitNonGitRepository,
 
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                          fetch.InterGitRepository,
 
81
                          push.InterToGitRepository]:
 
82
            repository.InterRepository.register_optimiser(optimiser)
67
83
 
68
84
    def is_shared(self):
69
85
        return True
83
99
 
84
100
 
85
101
class LocalGitRepository(GitRepository):
 
102
    """Git repository on the file system."""
86
103
 
87
104
    def __init__(self, gitdir, lockfiles):
88
105
        # FIXME: This also caches negatives. Need to be more careful 
94
111
        self.texts = None
95
112
        self.signatures = versionedfiles.VirtualSignatureTexts(self)
96
113
        self.revisions = versionedfiles.VirtualRevisionTexts(self)
 
114
        self.inventories = versionedfiles.VirtualInventoryTexts(self)
 
115
        self.texts = GitTexts(self)
97
116
        self.tags = GitTags(self._git.get_tags())
98
117
 
99
118
    def all_revision_ids(self):
100
119
        ret = set([revision.NULL_REVISION])
101
 
        if self._git.heads() == []:
 
120
        heads = self._git.heads()
 
121
        if heads == {}:
102
122
            return ret
103
 
        bzr_heads = [self.get_mapping().revision_id_foreign_to_bzr(h) for h in self._git.heads()]
 
123
        bzr_heads = [self.get_mapping().revision_id_foreign_to_bzr(h) for h in heads.itervalues()]
104
124
        ret = set(bzr_heads)
105
125
        graph = self.get_graph()
106
126
        for rev, parents in graph.iter_ancestry(bzr_heads):
124
144
            if revision_id == revision.NULL_REVISION:
125
145
                parent_map[revision_id] = ()
126
146
                continue
127
 
            hexsha = self.lookup_git_revid(revision_id, self.get_mapping())
 
147
            hexsha, mapping = self.lookup_git_revid(revision_id)
128
148
            commit  = self._git.commit(hexsha)
129
149
            if commit is None:
130
150
                continue
131
151
            else:
132
 
                parent_map[revision_id] = [self.get_mapping().revision_id_foreign_to_bzr(p) for p in commit.parents]
 
152
                parent_map[revision_id] = [mapping.revision_id_foreign_to_bzr(p) for p in commit.parents]
133
153
        return parent_map
134
154
 
135
155
    def get_ancestry(self, revision_id, topo_sorted=True):
136
156
        """See Repository.get_ancestry().
137
157
        """
138
158
        if revision_id is None:
139
 
            return self._all_revision_ids()
 
159
            return [None, revision.NULL_REVISION] + self._all_revision_ids()
140
160
        assert isinstance(revision_id, str)
141
161
        ancestry = []
142
162
        graph = self.get_graph()
143
163
        for rev, parents in graph.iter_ancestry([revision_id]):
144
 
            if rev == revision.NULL_REVISION:
145
 
                rev = None
146
164
            ancestry.append(rev)
147
165
        ancestry.reverse()
148
 
        return ancestry
 
166
        return [None] + ancestry
 
167
 
 
168
    def import_revision_gist(self, source, revid, parent_lookup):
 
169
        """Import the gist of a revision into this Git repository.
 
170
 
 
171
        """
 
172
        objects = []
 
173
        rev = source.get_revision(revid)
 
174
        for sha, object, path in inventory_to_tree_and_blobs(source, None, revid):
 
175
            if path == "":
 
176
                tree_sha = sha
 
177
            objects.append((object, path))
 
178
        commit = revision_to_commit(rev, tree_sha, parent_lookup)
 
179
        objects.append((commit, None))
 
180
        self._git.object_store.add_objects(objects)
 
181
        return commit.sha().hexdigest()
 
182
 
 
183
    def dfetch(self, source, stop_revision):
 
184
        """Import the gist of the ancestry of a particular revision."""
 
185
        if stop_revision is None:
 
186
            raise NotImplementedError
 
187
        revidmap = {}
 
188
        gitidmap = {}
 
189
        def parent_lookup(revid):
 
190
            try:
 
191
                return gitidmap[revid]
 
192
            except KeyError:
 
193
                return self.lookup_git_revid(revid)[0]
 
194
        todo = []
 
195
        source.lock_write()
 
196
        try:
 
197
            graph = source.get_graph()
 
198
            ancestry = [x for x in source.get_ancestry(stop_revision) if x is not None]
 
199
            for revid in graph.iter_topo_order(ancestry):
 
200
                if not self.has_revision(revid):
 
201
                    todo.append(revid)
 
202
            pb = ui.ui_factory.nested_progress_bar()
 
203
            try:
 
204
                for i, revid in enumerate(todo):
 
205
                    pb.update("pushing revisions", i, len(todo))
 
206
                    git_commit = self.import_revision_gist(source, revid,
 
207
                        parent_lookup)
 
208
                    gitidmap[revid] = git_commit
 
209
                    git_revid = self.get_mapping().revision_id_foreign_to_bzr(
 
210
                        git_commit)
 
211
                    revidmap[revid] = git_revid
 
212
            finally:
 
213
                pb.finished()
 
214
            source.fetch(self, revision_id=revidmap[stop_revision])
 
215
        finally:
 
216
            source.unlock()
 
217
        return revidmap
149
218
 
150
219
    def get_signature_text(self, revision_id):
151
220
        raise errors.NoSuchRevision(self, revision_id)
162
231
    def has_signature_for_revision_id(self, revision_id):
163
232
        return False
164
233
 
165
 
    def lookup_git_revid(self, bzr_revid, mapping):
 
234
    def lookup_git_revid(self, bzr_revid):
166
235
        try:
167
 
            return mapping.revision_id_bzr_to_foreign(bzr_revid)
 
236
            return mapping_registry.revision_id_bzr_to_foreign(bzr_revid)
168
237
        except errors.InvalidRevisionId:
169
238
            raise errors.NoSuchRevision(self, bzr_revid)
170
239
 
171
240
    def get_revision(self, revision_id):
172
 
        git_commit_id = self.lookup_git_revid(revision_id, self.get_mapping())
 
241
        git_commit_id, mapping = self.lookup_git_revid(revision_id)
173
242
        try:
174
243
            commit = self._git.commit(git_commit_id)
175
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        except KeyError:
176
245
            raise errors.NoSuchRevision(self, revision_id)
177
246
        # print "fetched revision:", git_commit_id
178
 
        revision = self.get_mapping().import_commit(commit)
 
247
        revision = mapping.import_commit(commit)
179
248
        assert revision is not None
180
249
        return revision
181
250
 
196
265
 
197
266
    def revision_tree(self, revision_id):
198
267
        revision_id = revision.ensure_null(revision_id)
199
 
 
200
268
        if revision_id == revision.NULL_REVISION:
201
269
            inv = inventory.Inventory(root_id=None)
202
270
            inv.revision_id = revision_id
203
271
            return revisiontree.RevisionTree(self, inv, revision_id)
204
 
 
205
 
        return GitRevisionTree(self, self.get_mapping(), revision_id)
 
272
        return GitRevisionTree(self, revision_id)
206
273
 
207
274
    def get_inventory(self, revision_id):
208
275
        assert revision_id != None
211
278
    def set_make_working_trees(self, trees):
212
279
        pass
213
280
 
214
 
    def fetch_objects(self, determine_wants, graph_walker, progress=None):
 
281
    def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref,
 
282
        progress=None):
215
283
        return self._git.fetch_objects(determine_wants, graph_walker, progress)
216
284
 
217
285
 
218
286
class GitRevisionTree(revisiontree.RevisionTree):
219
287
 
220
 
    def __init__(self, repository, mapping, revision_id):
 
288
    def __init__(self, repository, revision_id):
221
289
        self._repository = repository
222
 
        self.revision_id = revision_id
 
290
        self._revision_id = revision_id
223
291
        assert isinstance(revision_id, str)
224
 
        self.mapping = mapping
225
 
        git_id = repository.lookup_git_revid(revision_id, self.mapping)
 
292
        git_id, self.mapping = repository.lookup_git_revid(revision_id)
226
293
        try:
227
294
            commit = repository._git.commit(git_id)
228
295
        except KeyError, r:
233
300
        self._build_inventory(self.tree, self._inventory.root, "")
234
301
 
235
302
    def get_revision_id(self):
236
 
        return self.revision_id
 
303
        return self._revision_id
237
304
 
238
305
    def get_file_text(self, file_id):
239
306
        entry = self._inventory[file_id]
261
328
                    child_ie.text_sha1 = osutils.sha_string(b.data)
262
329
                elif file_kind == 2:
263
330
                    child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)
 
331
                    child_ie.symlink_target = b.data
264
332
                    child_ie.text_sha1 = osutils.sha_string("")
265
333
                else:
266
334
                    raise AssertionError(
272
340
                    "Unknown blob kind, perms=%r." % (mode,))
273
341
            fs_mode = mode & 0777
274
342
            child_ie.executable = bool(fs_mode & 0111)
275
 
            child_ie.revision = self.revision_id
 
343
            # TODO: This should be set to the revision id in which 
 
344
            # child_ie was last changed instead.
 
345
            child_ie.revision = self._revision_id
276
346
            self._inventory.add(child_ie)
277
347
            if entry_kind == 0:
278
348
                self._build_inventory(hexsha, child_ie, child_path)
279
349
 
280
350
 
281
 
class GitFormat(object):
 
351
class GitRepositoryFormat(repository.RepositoryFormat):
282
352
 
283
353
    supports_tree_reference = False
284
354
    rich_root_data = True