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push.py
 
1
# Copyright (C) 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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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
16
 
 
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"""Push implementation that simply prints message saying push is not supported."""
 
18
 
 
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from bzrlib import (
 
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    errors,
 
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    ui,
 
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    )
 
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from bzrlib.repository import (
 
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    InterRepository,
 
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    )
 
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from bzrlib.revision import (
 
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    NULL_REVISION,
 
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    )
 
29
 
 
30
from bzrlib.plugins.git.errors import (
 
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    NoPushSupport,
 
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    )
 
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from bzrlib.plugins.git.object_store import (
 
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    BazaarObjectStore,
 
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    )
 
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from bzrlib.plugins.git.repository import (
 
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    GitRepository,
 
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    LocalGitRepository,
 
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    GitRepositoryFormat,
 
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    )
 
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from bzrlib.plugins.git.remote import (
 
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    RemoteGitRepository,
 
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    )
 
44
 
 
45
 
 
46
class MissingObjectsIterator(object):
 
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    """Iterate over git objects that are missing from a target repository.
 
48
 
 
49
    """
 
50
 
 
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    def __init__(self, store, source, pb=None):
 
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        """Create a new missing objects iterator.
 
53
 
 
54
        """
 
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        self.source = source
 
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        self._object_store = store
 
57
        self._pending = []
 
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        self.pb = pb
 
59
 
 
60
    def import_revisions(self, revids):
 
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        for i, revid in enumerate(revids):
 
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            if self.pb:
 
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                self.pb.update("pushing revisions", i, len(revids))
 
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            git_commit = self.import_revision(revid)
 
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            yield (revid, git_commit)
 
66
 
 
67
    def import_revision(self, revid):
 
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        """Import the gist of a revision into this Git repository.
 
69
 
 
70
        """
 
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        inv = self._object_store.parent_invs_cache.get_inventory(revid)
 
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        rev = self.source.get_revision(revid)
 
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        commit = None
 
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        for path, obj in self._object_store._revision_to_objects(rev, inv):
 
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            if obj.type_name == "commit":
 
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                commit = obj
 
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            self._pending.append((obj, path))
 
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        return commit.id
 
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    def __len__(self):
 
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        return len(self._pending)
 
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    def __iter__(self):
 
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        return iter(self._pending)
 
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86
 
 
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class InterToGitRepository(InterRepository):
 
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    """InterRepository that copies into a Git repository."""
 
89
 
 
90
    _matching_repo_format = GitRepositoryFormat()
 
91
 
 
92
    def __init__(self, source, target):
 
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        super(InterToGitRepository, self).__init__(source, target)
 
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        self.mapping = self.target.get_mapping()
 
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        self.source_store = BazaarObjectStore(self.source, self.mapping)
 
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    @staticmethod
 
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    def _get_repo_format_to_test():
 
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        return None
 
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    def copy_content(self, revision_id=None, pb=None):
 
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        """See InterRepository.copy_content."""
 
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        self.fetch(revision_id, pb, find_ghosts=False)
 
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    def fetch(self, revision_id=None, pb=None, find_ghosts=False,
 
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            fetch_spec=None):
 
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        raise NoPushSupport()
 
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109
 
 
110
class InterToLocalGitRepository(InterToGitRepository):
 
111
 
 
112
    def missing_revisions(self, stop_revisions, check_revid):
 
113
        missing = []
 
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        pb = ui.ui_factory.nested_progress_bar()
 
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        try:
 
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            graph = self.source.get_graph()
 
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            for revid, _ in graph.iter_ancestry(stop_revisions):
 
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                pb.update("determining revisions to fetch", len(missing))
 
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                if not check_revid(revid):
 
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                    missing.append(revid)
 
121
            return graph.iter_topo_order(missing)
 
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        finally:
 
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            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())
 
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        for name, revid in refs.iteritems():
 
130
            if revid in gitidmap:
 
131
                gitid = gitidmap[revid]
 
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            else:
 
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                gitid = self.source_store._lookup_revision_sha1(revid)
 
134
            self.target._git.refs[name] = gitid
 
135
            new_refs[name] = gitid
 
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        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()
 
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        try:
 
144
            target_store = self.target._git.object_store
 
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            def check_revid(revid):
 
146
                if revid == NULL_REVISION:
 
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                    return True
 
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                try:
 
149
                    return (self.source_store._lookup_revision_sha1(revid) in target_store)
 
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                except errors.NoSuchRevision:
 
151
                    # Ghost, can't dpush
 
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                    return True
 
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            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))