1
# Copyright (C) 2008-2012 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
"""Foreign branch utilities."""
19
from __future__ import absolute_import
25
from .repository import Repository
26
from .revision import Revision
27
from .lazy_import import lazy_import
28
lazy_import(globals(), """
36
class VcsMapping(object):
37
"""Describes the mapping between the semantics of Bazaar and a foreign VCS.
40
# Whether this is an experimental mapping that is still open to changes.
43
# Whether this mapping supports exporting and importing all bzr semantics.
46
# Prefix used when importing revisions native to the foreign VCS (as
47
# opposed to roundtripping bzr-native revisions) using this mapping.
50
def __init__(self, vcs):
51
"""Create a new VcsMapping.
53
:param vcs: VCS that this mapping maps to Bazaar
57
def revision_id_bzr_to_foreign(self, bzr_revid):
58
"""Parse a bzr revision id and convert it to a foreign revid.
60
:param bzr_revid: The bzr revision id (a string).
61
:return: A foreign revision id, can be any sort of object.
63
raise NotImplementedError(self.revision_id_bzr_to_foreign)
65
def revision_id_foreign_to_bzr(self, foreign_revid):
66
"""Parse a foreign revision id and convert it to a bzr revid.
68
:param foreign_revid: Foreign revision id, can be any sort of object.
69
:return: A bzr revision id.
71
raise NotImplementedError(self.revision_id_foreign_to_bzr)
74
class VcsMappingRegistry(registry.Registry):
75
"""Registry for Bazaar<->foreign VCS mappings.
77
There should be one instance of this registry for every foreign VCS.
80
def register(self, key, factory, help):
81
"""Register a mapping between Bazaar and foreign VCS semantics.
83
The factory must be a callable that takes one parameter: the key.
84
It must produce an instance of VcsMapping when called.
87
raise ValueError("mapping name can not contain colon (:)")
88
registry.Registry.register(self, key, factory, help)
90
def set_default(self, key):
91
"""Set the 'default' key to be a clone of the supplied key.
93
This method must be called once and only once.
95
self._set_default_key(key)
97
def get_default(self):
98
"""Convenience function for obtaining the default mapping to use."""
99
return self.get(self._get_default_key())
101
def revision_id_bzr_to_foreign(self, revid):
102
"""Convert a bzr revision id to a foreign revid."""
103
raise NotImplementedError(self.revision_id_bzr_to_foreign)
106
class ForeignRevision(Revision):
107
"""A Revision from a Foreign repository. Remembers
108
information about foreign revision id and mapping.
112
def __init__(self, foreign_revid, mapping, *args, **kwargs):
113
if "inventory_sha1" not in kwargs:
114
kwargs["inventory_sha1"] = b""
115
super(ForeignRevision, self).__init__(*args, **kwargs)
116
self.foreign_revid = foreign_revid
117
self.mapping = mapping
120
class ForeignVcs(object):
121
"""A foreign version control system."""
125
repository_format = None
127
def __init__(self, mapping_registry, abbreviation=None):
128
"""Create a new foreign vcs instance.
130
:param mapping_registry: Registry with mappings for this VCS.
131
:param abbreviation: Optional abbreviation ('bzr', 'svn', 'git', etc)
133
self.abbreviation = abbreviation
134
self.mapping_registry = mapping_registry
136
def show_foreign_revid(self, foreign_revid):
137
"""Prepare a foreign revision id for formatting using bzr log.
139
:param foreign_revid: Foreign revision id.
140
:return: Dictionary mapping string keys to string values.
144
def serialize_foreign_revid(self, foreign_revid):
145
"""Serialize a foreign revision id for this VCS.
147
:param foreign_revid: Foreign revision id
148
:return: Bytestring with serialized revid, will not contain any
151
raise NotImplementedError(self.serialize_foreign_revid)
154
class ForeignVcsRegistry(registry.Registry):
155
"""Registry for Foreign VCSes.
157
There should be one entry per foreign VCS. Example entries would be
158
"git", "svn", "hg", "darcs", etc.
162
def register(self, key, foreign_vcs, help):
163
"""Register a foreign VCS.
165
:param key: Prefix of the foreign VCS in revision ids
166
:param foreign_vcs: ForeignVCS instance
167
:param help: Description of the foreign VCS
169
if ":" in key or "-" in key:
170
raise ValueError("vcs name can not contain : or -")
171
registry.Registry.register(self, key, foreign_vcs, help)
173
def parse_revision_id(self, revid):
174
"""Parse a bzr revision and return the matching mapping and foreign
177
:param revid: The bzr revision id
178
:return: tuple with foreign revid and vcs mapping
180
if b":" not in revid or b"-" not in revid:
181
raise errors.InvalidRevisionId(revid, None)
183
foreign_vcs = self.get(revid.split(b"-")[0].decode('ascii'))
185
raise errors.InvalidRevisionId(revid, None)
186
return foreign_vcs.mapping_registry.revision_id_bzr_to_foreign(revid)
189
foreign_vcs_registry = ForeignVcsRegistry()
192
class ForeignRepository(Repository):
193
"""A Repository that exists in a foreign version control system.
195
The data in this repository can not be represented natively using
196
Bazaars internal datastructures, but have to converted using a VcsMapping.
199
# This repository's native version control system
202
def has_foreign_revision(self, foreign_revid):
203
"""Check whether the specified foreign revision is present.
205
:param foreign_revid: A foreign revision id, in the format used
206
by this Repository's VCS.
208
raise NotImplementedError(self.has_foreign_revision)
210
def lookup_bzr_revision_id(self, revid):
211
"""Lookup a mapped or roundtripped revision by revision id.
213
:param revid: Bazaar revision id
214
:return: Tuple with foreign revision id and mapping.
216
raise NotImplementedError(self.lookup_revision_id)
218
def all_revision_ids(self, mapping=None):
219
"""See Repository.all_revision_ids()."""
220
raise NotImplementedError(self.all_revision_ids)
222
def get_default_mapping(self):
223
"""Get the default mapping for this repository."""
224
raise NotImplementedError(self.get_default_mapping)
227
class ForeignBranch(Branch):
228
"""Branch that exists in a foreign version control system."""
230
def __init__(self, mapping):
231
self.mapping = mapping
232
super(ForeignBranch, self).__init__()