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branch.py
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# Copyright (C) 2007 Canonical Ltd
 
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# 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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"""An adapter between a Git Branch and a Bazaar Branch"""
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from dulwich.objects import (
 
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    Commit,
 
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    Tag,
 
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    )
 
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from bzrlib import (
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    branch,
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    config,
 
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    repository,
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    revision,
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    tag,
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    )
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from bzrlib.decorators import needs_read_lock
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from bzrlib.plugins.git.foreign import ForeignBranch
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from bzrlib.plugins.git.mapping import default_mapping
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class GitTagDict(tag.BasicTags):
 
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from bzrlib.decorators import (
 
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    needs_read_lock,
 
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    )
 
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from bzrlib.trace import (
 
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    mutter,
 
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    )
 
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from bzrlib.plugins.git.errors import (
 
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    NoSuchRef,
 
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    )
 
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from bzrlib.plugins.git.foreign import (
 
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    ForeignBranch,
 
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    )
 
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from bzrlib.plugins.git.errors import (
 
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    LightWeightCheckoutsNotSupported,
 
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    )
 
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class LocalGitTagDict(tag.BasicTags):
 
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    """Dictionary with tags in a local repository."""
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    def __init__(self, branch):
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        self.branch = branch
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    def get_tag_dict(self):
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        ret = {}
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        for tag in self.repository._git.tags:
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            ret[tag.name] = self.branch.mapping.revision_id_foreign_to_bzr(tag.ref)
 
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        for k,v in self.repository._git.tags.iteritems():
 
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            obj = self.repository._git.get_object(v)
 
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            while isinstance(obj, Tag):
 
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                v = obj.object[1]
 
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                obj = self.repository._git.get_object(v)
 
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            if not isinstance(obj, Commit):
 
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                mutter("Tag %s points at object %r that is not a commit, "
 
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                       "ignoring", k, obj)
 
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                continue
 
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            ret[k] = self.branch.mapping.revision_id_foreign_to_bzr(v)
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        return ret
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    def set_tag(self, name, revid):
43
 
        raise NotImplementedError(self.set_tag)
 
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        self.repository._git.tags[name] = revid
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74
 
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class GitBranchConfig(config.BranchConfig):
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        # do not provide a BranchDataConfig
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        self.option_sources = self.option_sources[0], self.option_sources[2]
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54
 
    def set_user_option(self, name, value, local=False):
 
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    def set_user_option(self, name, value, store=config.STORE_BRANCH,
 
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            warn_masked=False):
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        """Force local to True"""
56
 
        config.BranchConfig.set_user_option(self, name, value, local=True)
 
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        config.BranchConfig.set_user_option(self, name, value,
 
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            store=config.STORE_LOCATION, warn_masked=warn_masked)
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class GitBranchFormat(branch.BranchFormat):
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    def supports_tags(self):
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        return True
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    def make_tags(self, branch):
 
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        if getattr(branch.repository, "get_refs", None) is not None:
 
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            from bzrlib.plugins.git.remote import RemoteGitTagDict
 
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            return RemoteGitTagDict(branch)
 
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        else:
 
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            return LocalGitTagDict(branch)
 
104
 
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class GitBranch(ForeignBranch):
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    """An adapter to git repositories for bzr Branch objects."""
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71
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    def __init__(self, bzrdir, repository, name, head, lockfiles):
72
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        self.repository = repository
73
 
        super(GitBranch, self).__init__(default_mapping)
 
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        self._format = GitBranchFormat()
 
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        super(GitBranch, self).__init__(repository.get_mapping())
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        self.control_files = lockfiles
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        self.bzrdir = bzrdir
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        self.name = name
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        self.head = head
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        self.base = bzrdir.transport.base
79
 
        self._format = GitBranchFormat()
 
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    def dpull(self, source, stop_revision=None):
 
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        if stop_revision is None:
 
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            stop_revision = source.last_revision()
 
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        # FIXME: Check for diverged branches
 
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        revidmap = self.repository.dfetch(source.repository, stop_revision)
 
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        self.head, self.mapping = self.mapping.revision_id_bzr_to_foreign(
 
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            revidmap[stop_revision])
 
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        self.repository._git.set_ref(self.name, self.head)
 
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        return revidmap
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    def lock_write(self):
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        self.control_files.lock_write()
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        """See Branch.get_parent()."""
90
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        return None
91
139
 
 
140
    def set_parent(self, url):
 
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        pass
 
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    def lock_read(self):
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        self.control_files.lock_read()
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101
152
 
102
153
class LocalGitBranch(GitBranch):
 
154
    """A local Git branch."""
103
155
 
104
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    @needs_read_lock
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    def last_revision(self):
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            return revision.NULL_REVISION
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        return self.mapping.revision_id_foreign_to_bzr(self.head)
110
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    def _make_tags(self):
112
 
        return GitTagDict(self)
 
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    def create_checkout(self, to_location, revision_id=None, lightweight=False,
 
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        accelerator_tree=None, hardlink=False):
 
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        if lightweight:
 
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            raise LightWeightCheckoutsNotSupported()
 
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        return self._create_heavyweight_checkout(to_location, revision_id,
 
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            hardlink)
 
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170
    def _create_heavyweight_checkout(self, to_location, revision_id=None, 
 
171
                                     hardlink=False):
 
172
        """Create a new heavyweight checkout of this branch.
 
173
 
 
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        :param to_location: URL of location to create the new checkout in.
 
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        :param revision_id: Revision that should be the tip of the checkout.
 
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        :param hardlink: Whether to hardlink
 
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        :return: WorkingTree object of checkout.
 
178
        """
 
179
        checkout_branch = BzrDir.create_branch_convenience(
 
180
            to_location, force_new_tree=False, format=get_rich_root_format())
 
181
        checkout = checkout_branch.bzrdir
 
182
        checkout_branch.bind(self)
 
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        # pull up to the specified revision_id to set the initial 
 
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        # branch tip correctly, and seed it with history.
 
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        checkout_branch.pull(self, stop_revision=revision_id)
 
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        return checkout.create_workingtree(revision_id, hardlink=hardlink)
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    def _gen_revision_history(self):
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        if self.head is None:
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            return []
117
 
        ret = list(self.repository.iter_reverse_revision_history(self.last_revision()))
 
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        ret = list(self.repository.iter_reverse_revision_history(
 
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            self.last_revision()))
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        ret.reverse()
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        return ret
120
195
 
129
204
    def set_push_location(self, location):
130
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        """See Branch.set_push_location."""
131
206
        self.get_config().set_user_option('push_location', location,
132
 
                                          local=True)
 
207
                                          store=config.STORE_LOCATION)
133
208
 
134
209
    def supports_tags(self):
135
210
        return True
136
211
 
137
 
    def sprout(self, to_bzrdir, revision_id=None):
138
 
        """See Branch.sprout()."""
139
 
        result = to_bzrdir.create_branch()
140
 
        self.copy_content_into(result, revision_id=revision_id)
141
 
        result.set_parent(self.bzrdir.root_transport.base)
142
 
        return result
143
 
 
 
212
 
 
213
class InterGitGenericBranch(branch.InterBranch):
 
214
    """InterBranch implementation that pulls from Git into bzr."""
 
215
 
 
216
    @classmethod
 
217
    def is_compatible(self, source, target):
 
218
        return isinstance(source, GitBranch)
 
219
 
 
220
    def update_revisions(self, stop_revision=None, overwrite=False,
 
221
        graph=None):
 
222
        """See InterBranch.update_revisions()."""
 
223
        # TODO: stop_revision, overwrite
 
224
        interrepo = repository.InterRepository.get(self.source.repository, 
 
225
            self.target.repository)
 
226
        self._last_revid = None
 
227
        def determine_wants(heads):
 
228
            if not self.source.name in heads:
 
229
                raise NoSuchRef(self.source.name, heads.keys())
 
230
            head = heads[self.source.name]
 
231
            self._last_revid = self.source.mapping.revision_id_foreign_to_bzr(
 
232
                head)
 
233
            if self.target.repository.has_revision(self._last_revid):
 
234
                return []
 
235
            return [head]
 
236
        interrepo.fetch_objects(determine_wants, self.source.mapping)
 
237
        self.target.generate_revision_history(self._last_revid)
 
238
 
 
239
 
 
240
branch.InterBranch.register_optimiser(InterGitGenericBranch)