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fetch.py
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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from bzrlib import osutils, ui, urlutils
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from bzrlib.errors import InvalidRevisionId, NoSuchRevision
 
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from bzrlib.errors import InvalidRevisionId
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from bzrlib.inventory import Inventory
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from bzrlib.repository import InterRepository
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from bzrlib.trace import info
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from bzrlib.tsort import topo_sort
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from bzrlib.plugins.git import git
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from bzrlib.plugins.git.repository import (
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        LocalGitRepository, 
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        GitRepository, 
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        GitFormat,
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        )
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from bzrlib.plugins.git.converter import GitObjectConverter
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from bzrlib.plugins.git.remote import RemoteGitRepository
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32
 
import dulwich as git
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from dulwich.client import SimpleFetchGraphWalker
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from dulwich.objects import Commit
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from cStringIO import StringIO
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class BzrFetchGraphWalker(object):
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    """GraphWalker implementation that uses a Bazaar repository."""
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    def __init__(self, repository, mapping):
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        self.repository = repository
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        self.heads = set(repository.all_revision_ids())
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        self.parents = {}
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    def __iter__(self):
50
 
        return iter(self.next, None)
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    def ack(self, sha):
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        revid = self.mapping.revision_id_foreign_to_bzr(sha)
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        self.remove(revid)
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    def remove(self, revid):
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        self.done.add(revid)
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        if revid in self.heads:
 
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        if ref in self.heads:
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            self.heads.remove(revid)
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        if revid in self.parents:
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            for p in self.parents[revid]:
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            self.heads.update([p for p in ps if not p in self.done])
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            try:
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                self.done.add(ret)
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                return self.mapping.revision_id_bzr_to_foreign(ret)[0]
 
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                return self.mapping.revision_id_bzr_to_foreign(ret)
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            except InvalidRevisionId:
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                pass
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        return None
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78
 
def import_git_blob(repo, mapping, path, blob, inv, parent_invs, gitmap, executable):
 
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def import_git_blob(repo, mapping, path, blob, inv, parent_invs, executable):
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    """Import a git blob object into a bzr repository.
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81
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    :param repo: bzr repository
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    ie.text_size = len(blob.data)
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    ie.text_sha1 = osutils.sha_string(blob.data)
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    ie.executable = executable
95
 
    gitmap._idmap.add_entry(blob.sha().hexdigest(), "blob", (ie.file_id, ie.revision))
96
 
 
97
 
 
98
 
def import_git_tree(repo, mapping, path, tree, inv, parent_invs, 
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                    gitmap, lookup_object):
 
89
 
 
90
 
 
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def import_git_tree(repo, mapping, path, tree, inv, parent_invs, lookup_object):
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    """Import a git tree object into a bzr repository.
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    :param repo: A Bzr repository object
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        [])
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    ie = inv.add_path(path, "directory", file_id)
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    ie.revision = text_revision
114
 
    gitmap._idmap.add_entry(tree.sha().hexdigest(), "tree", (file_id, text_revision))
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    for mode, name, hexsha in tree.entries():
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        entry_kind = (mode & 0700000) / 0100000
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        basename = name.decode("utf-8")
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            child_path = urlutils.join(path, name)
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        if entry_kind == 0:
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            tree = lookup_object(hexsha)
124
 
            import_git_tree(repo, mapping, child_path, tree, inv, parent_invs, gitmap, lookup_object)
 
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            import_git_tree(repo, mapping, child_path, tree, inv, parent_invs, lookup_object)
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        elif entry_kind == 1:
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            blob = lookup_object(hexsha)
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            fs_mode = mode & 0777
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            import_git_blob(repo, mapping, child_path, blob, inv, parent_invs, gitmap, bool(fs_mode & 0111))
 
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            import_git_blob(repo, mapping, child_path, blob, inv, parent_invs, bool(fs_mode & 0111))
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        else:
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            raise AssertionError("Unknown blob kind, perms=%r." % (mode,))
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122
 
132
123
 
133
 
def import_git_objects(repo, mapping, object_iter, target_git_object_retriever, 
134
 
        pb=None):
 
124
def import_git_objects(repo, mapping, object_iter, pb=None):
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    """Import a set of git objects into a bzr repository.
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    :param repo: Bazaar repository
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    :param object_iter: Iterator over Git objects.
140
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    """
141
131
    # TODO: a more (memory-)efficient implementation of this
 
132
    objects = {}
 
133
    for i, o in enumerate(object_iter):
 
134
        if pb is not None:
 
135
            pb.update("fetching objects", i) 
 
136
        objects[o.id] = o
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137
    graph = []
143
138
    root_trees = {}
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139
    revisions = {}
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140
    # Find and convert commit objects
146
 
    for o in object_iter.iterobjects():
 
141
    for o in objects.itervalues():
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142
        if isinstance(o, Commit):
148
143
            rev = mapping.import_commit(o)
149
 
            root_trees[rev.revision_id] = object_iter[o.tree]
 
144
            root_trees[rev.revision_id] = objects[o.tree]
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            revisions[rev.revision_id] = rev
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            graph.append((rev.revision_id, rev.parent_ids))
152
 
            target_git_object_retriever._idmap.add_entry(o.sha().hexdigest(), "commit", (rev.revision_id, o._tree))
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    # Order the revisions
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    # Create the inventory objects
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    for i, revid in enumerate(topo_sort(graph)):
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        inv = Inventory()
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        inv.revision_id = rev.revision_id
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        def lookup_object(sha):
166
 
            if sha in object_iter:
167
 
                return object_iter[sha]
168
 
            return target_git_object_retriever[sha]
 
160
            if sha in objects:
 
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                return objects[sha]
 
162
            return reconstruct_git_object(repo, mapping, sha)
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        parent_invs = [repo.get_inventory(r) for r in rev.parent_ids]
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        import_git_tree(repo, mapping, "", root_tree, inv, parent_invs, 
171
 
            target_git_object_retriever, lookup_object)
 
165
            lookup_object)
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        repo.add_revision(rev.revision_id, rev, inv)
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167
 
174
168
 
175
 
class InterGitNonGitRepository(InterRepository):
 
169
def reconstruct_git_commit(repo, rev):
 
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    raise NotImplementedError(self.reconstruct_git_commit)
 
171
 
 
172
 
 
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def reconstruct_git_object(repo, mapping, sha):
 
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    # Commit
 
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    revid = mapping.revision_id_foreign_to_bzr(sha)
 
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    try:
 
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        rev = repo.get_revision(revid)
 
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    except NoSuchRevision:
 
179
        pass
 
180
    else:
 
181
        return reconstruct_git_commit(rev)
 
182
 
 
183
    # TODO: Tree
 
184
    # TODO: Blob
 
185
    raise KeyError("No such object %s" % sha)
 
186
 
 
187
 
 
188
class InterGitRepository(InterRepository):
176
189
 
177
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    _matching_repo_format = GitFormat()
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191
 
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        """See InterRepository.copy_content."""
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        self.fetch(revision_id, pb, find_ghosts=False)
186
199
 
187
 
    def fetch_objects(self, determine_wants, mapping, pb=None):
 
200
    def fetch(self, revision_id=None, pb=None, find_ghosts=False, 
 
201
              mapping=None):
 
202
        if mapping is None:
 
203
            mapping = self.source.get_mapping()
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204
        def progress(text):
189
 
            pb.update("git: %s" % text.rstrip("\r\n"), 0, 0)
 
205
            pb.note("git: %s", text)
 
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        def determine_wants(heads):
 
207
            if revision_id is None:
 
208
                ret = heads.values()
 
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            else:
 
210
                ret = [mapping.revision_id_bzr_to_foreign(revision_id)]
 
211
            return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
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212
        graph_walker = BzrFetchGraphWalker(self.target, mapping)
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213
        create_pb = None
192
214
        if pb is None:
193
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            create_pb = pb = ui.ui_factory.nested_progress_bar()
194
 
        target_git_object_retriever = GitObjectConverter(self.target, mapping)
195
 
        
196
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        try:
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            self.target.lock_write()
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            try:
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                self.target.start_write_group()
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220
                try:
201
 
                    objects_iter = self.source.fetch_objects(determine_wants, 
202
 
                                graph_walker, 
203
 
                                target_git_object_retriever.__getitem__, 
204
 
                                progress)
205
 
                    import_git_objects(self.target, mapping, objects_iter, 
206
 
                            target_git_object_retriever, pb)
 
221
                    import_git_objects(self.target, mapping,
 
222
                        iter(self.source.fetch_objects(determine_wants, graph_walker, 
 
223
                            progress)), pb)
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224
                finally:
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225
                    self.target.commit_write_group()
209
226
            finally:
212
229
            if create_pb:
213
230
                create_pb.finished()
214
231
 
215
 
    def fetch(self, revision_id=None, pb=None, find_ghosts=False, 
216
 
              mapping=None):
217
 
        if mapping is None:
218
 
            mapping = self.source.get_mapping()
219
 
        def determine_wants(heads):
220
 
            if revision_id is None:
221
 
                ret = heads.values()
222
 
            else:
223
 
                ret = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
224
 
            return [rev for rev in ret if not self.target.has_revision(mapping.revision_id_foreign_to_bzr(rev))]
225
 
        return self.fetch_objects(determine_wants, mapping, pb)
226
 
 
227
232
    @staticmethod
228
233
    def is_compatible(source, target):
229
234
        """Be compatible with GitRepository."""
230
235
        # FIXME: Also check target uses VersionedFile
231
236
        return (isinstance(source, GitRepository) and 
232
 
                target.supports_rich_root() and
233
 
                not isinstance(target, GitRepository))
234
 
 
235
 
 
236
 
class InterGitRepository(InterRepository):
237
 
 
238
 
    _matching_repo_format = GitFormat()
239
 
 
240
 
    @staticmethod
241
 
    def _get_repo_format_to_test():
242
 
        return None
243
 
 
244
 
    def copy_content(self, revision_id=None, pb=None):
245
 
        """See InterRepository.copy_content."""
246
 
        self.fetch(revision_id, pb, find_ghosts=False)
247
 
 
248
 
    def fetch(self, revision_id=None, pb=None, find_ghosts=False, 
249
 
              mapping=None):
250
 
        if mapping is None:
251
 
            mapping = self.source.get_mapping()
252
 
        def progress(text):
253
 
            info("git: %s", text)
254
 
        r = self.target._git
255
 
        if revision_id is None:
256
 
            determine_wants = lambda x: [y for y in x.values() if not y in r.object_store]
257
 
        else:
258
 
            args = [mapping.revision_id_bzr_to_foreign(revision_id)[0]]
259
 
            determine_wants = lambda x: [y for y in args if not y in r.object_store]
260
 
 
261
 
        graphwalker = SimpleFetchGraphWalker(r.heads().values(), r.get_parents)
262
 
        f, commit = r.object_store.add_pack()
263
 
        try:
264
 
            self.source._git.fetch_pack(path, determine_wants, graphwalker, f.write, progress)
265
 
            f.close()
266
 
            commit()
267
 
        except:
268
 
            f.close()
269
 
            raise
270
 
 
271
 
    @staticmethod
272
 
    def is_compatible(source, target):
273
 
        """Be compatible with GitRepository."""
274
 
        return (isinstance(source, GitRepository) and 
275
 
                isinstance(target, GitRepository))
 
237
                target.supports_rich_root())