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  • Committer: Martin Pool
  • Date: 2005-08-04 22:04:40 UTC
  • Revision ID: mbp@sourcefrog.net-20050804220440-99562df8151d1ac5
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repository.py
1
 
# Copyright (C) 2007 Canonical Ltd
2
 
#
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.
7
 
#
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.
12
 
#
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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16
 
 
17
 
"""An adapter between a Git Repository and a Bazaar Branch"""
18
 
 
19
 
import git
20
 
import os
21
 
import time
22
 
 
23
 
import bzrlib
24
 
from bzrlib import (
25
 
    deprecated_graph,
26
 
    errors,
27
 
    inventory,
28
 
    osutils,
29
 
    repository,
30
 
    revision,
31
 
    revisiontree,
32
 
    urlutils,
33
 
    versionedfile,
34
 
    )
35
 
from bzrlib.foreign import (
36
 
        ForeignRevision,
37
 
        )
38
 
from bzrlib.transport import get_transport
39
 
 
40
 
from bzrlib.plugins.git.foreign import (
41
 
    ForeignRepository,
42
 
    versionedfiles,
43
 
    )
44
 
from bzrlib.plugins.git.mapping import default_mapping
45
 
 
46
 
 
47
 
class GitRepository(ForeignRepository):
48
 
    """An adapter to git repositories for bzr."""
49
 
 
50
 
    _serializer = None
51
 
 
52
 
    def __init__(self, gitdir, lockfiles):
53
 
        self.base = gitdir.root_transport.base
54
 
        self.bzrdir = gitdir
55
 
        self.control_files = lockfiles
56
 
        self._git = gitdir._git
57
 
        self.texts = None
58
 
        self.signatures = versionedfiles.VirtualSignatureTexts(self)
59
 
        self.revisions = versionedfiles.VirtualRevisionTexts(self)
60
 
        self._format = GitFormat()
61
 
        self._fallback_repositories = []
62
 
 
63
 
    def _all_revision_ids(self):
64
 
        if self._git.heads == []:
65
 
            return set()
66
 
        ret = set()
67
 
        skip = 0
68
 
        max_count = 1000
69
 
        cms = None
70
 
        while cms != []:
71
 
            cms = self._git.commits("--all", max_count=max_count, skip=skip)
72
 
            skip += max_count
73
 
            ret.update([default_mapping.revision_id_foreign_to_bzr(cm.id) for cm in cms])
74
 
        return ret
75
 
 
76
 
    def is_shared(self):
77
 
        return True
78
 
 
79
 
    def supports_rich_root(self):
80
 
        return False
81
 
 
82
 
    #def get_revision_delta(self, revision_id):
83
 
    #    parent_revid = self.get_revision(revision_id).parent_ids[0]
84
 
    #    diff = self._git.diff(ids.convert_revision_id_bzr_to_git(parent_revid),
85
 
    #                   ids.convert_revision_id_bzr_to_git(revision_id))
86
 
 
87
 
    def get_ancestry(self, revision_id):
88
 
        revision_id = revision.ensure_null(revision_id)
89
 
        ret = []
90
 
        if revision_id != revision.NULL_REVISION:
91
 
            skip = 0
92
 
            max_count = 1000
93
 
            cms = None
94
 
            while cms != []:
95
 
                cms = self._git.commits(self.lookup_git_revid(revision_id, default_mapping), max_count=max_count, skip=skip)
96
 
                skip += max_count
97
 
                ret += [default_mapping.revision_id_foreign_to_bzr(cm.id) for cm in cms]
98
 
        return [None] + ret
99
 
 
100
 
    def get_signature_text(self, revision_id):
101
 
        raise errors.NoSuchRevision(self, revision_id)
102
 
 
103
 
    def has_signature_for_revision_id(self, revision_id):
104
 
        return False
105
 
 
106
 
    def get_parent_map(self, revision_ids):
107
 
        ret = {}
108
 
        for revid in revision_ids:
109
 
            if revid == revision.NULL_REVISION:
110
 
                ret[revid] = ()
111
 
            else:
112
 
                commit = self._git.commit(self.lookup_git_revid(revid, default_mapping))
113
 
                ret[revid] = tuple([default_mapping.revision_id_foreign_to_bzr(p.id) for p in commit.parents])
114
 
        return ret
115
 
 
116
 
    def lookup_git_revid(self, bzr_revid, mapping):
117
 
        try:
118
 
            return mapping.revision_id_bzr_to_foreign(bzr_revid)
119
 
        except errors.InvalidRevisionId:
120
 
            raise errors.NoSuchRevision(bzr_revid, self)
121
 
 
122
 
    def get_revision(self, revision_id):
123
 
        git_commit_id = self.lookup_git_revid(revision_id, default_mapping)
124
 
        commit = self._git.commit(git_commit_id)
125
 
        # print "fetched revision:", git_commit_id
126
 
        revision = self._parse_rev(commit, default_mapping)
127
 
        return revision
128
 
 
129
 
    def has_revision(self, revision_id):
130
 
        try:
131
 
            self.get_revision(revision_id)
132
 
        except NoSuchRevision:
133
 
            return False
134
 
        else:
135
 
            return True
136
 
 
137
 
    def get_revisions(self, revisions):
138
 
        return [self.get_revision(r) for r in revisions]
139
 
 
140
 
    @classmethod
141
 
    def _parse_rev(klass, commit, mapping):
142
 
        """Convert a git commit to a bzr revision.
143
 
 
144
 
        :return: a `bzrlib.revision.Revision` object.
145
 
        """
146
 
        rev = ForeignRevision(commit.id, mapping, mapping.revision_id_foreign_to_bzr(commit.id))
147
 
        rev.parent_ids = tuple([mapping.revision_id_foreign_to_bzr(p.id) for p in commit.parents])
148
 
        rev.message = commit.message.decode("utf-8", "replace")
149
 
        rev.committer = str(commit.committer).decode("utf-8", "replace")
150
 
        rev.properties['author'] = str(commit.author).decode("utf-8", "replace")
151
 
        rev.timestamp = time.mktime(commit.committed_date)
152
 
        rev.timezone = 0
153
 
        return rev
154
 
 
155
 
    def revision_trees(self, revids):
156
 
        for revid in revids:
157
 
            yield self.revision_tree(revid)
158
 
 
159
 
    def revision_tree(self, revision_id):
160
 
        revision_id = revision.ensure_null(revision_id)
161
 
 
162
 
        if revision_id == revision.NULL_REVISION:
163
 
            inv = inventory.Inventory(root_id=None)
164
 
            inv.revision_id = revision_id
165
 
            return revisiontree.RevisionTree(self, inv, revision_id)
166
 
 
167
 
        return GitRevisionTree(self, revision_id)
168
 
 
169
 
    def get_inventory(self, revision_id):
170
 
        assert revision_id != None
171
 
        return self.revision_tree(revision_id).inventory
172
 
 
173
 
    def set_make_working_trees(self, trees):
174
 
        pass
175
 
 
176
 
 
177
 
def escape_file_id(file_id):
178
 
    return file_id.replace('_', '__').replace(' ', '_s')
179
 
 
180
 
 
181
 
def unescape_file_id(file_id):
182
 
    return file_id.replace("_s", " ").replace("__", "_")
183
 
 
184
 
 
185
 
class GitRevisionTree(revisiontree.RevisionTree):
186
 
 
187
 
    def __init__(self, repository, revision_id):
188
 
        self._repository = repository
189
 
        self.revision_id = revision_id
190
 
        git_id = repository.lookup_git_revid(revision_id, default_mapping)
191
 
        self.tree = repository._git.commit(git_id).tree
192
 
        self._inventory = inventory.Inventory(revision_id=revision_id)
193
 
        self._inventory.root.revision = revision_id
194
 
        self._build_inventory(self.tree, self._inventory.root, "")
195
 
 
196
 
    def get_revision_id(self):
197
 
        return self.revision_id
198
 
 
199
 
    def get_file_text(self, file_id):
200
 
        entry = self._inventory[file_id]
201
 
        if entry.kind == 'directory': return ""
202
 
        return self._repository._git.blob(entry.text_id).data
203
 
 
204
 
    def _build_inventory(self, tree, ie, path):
205
 
        assert isinstance(path, str)
206
 
        for b in tree.contents:
207
 
            basename = b.name.decode("utf-8")
208
 
            if path == "":
209
 
                child_path = b.name
210
 
            else:
211
 
                child_path = urlutils.join(path, b.name)
212
 
            file_id = escape_file_id(child_path.encode('utf-8'))
213
 
            if b.mode[0] == '0':
214
 
                child_ie = inventory.InventoryDirectory(file_id, basename, ie.file_id)
215
 
            elif b.mode[0] == '1':
216
 
                if b.mode[1] == '0':
217
 
                    child_ie = inventory.InventoryFile(file_id, basename, ie.file_id)
218
 
                    child_ie.text_sha1 = osutils.sha_string(b.data)
219
 
                elif b.mode[1] == '2':
220
 
                    child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)
221
 
                    child_ie.text_sha1 = osutils.sha_string("")
222
 
                else:
223
 
                    raise AssertionError(
224
 
                        "Unknown file kind, perms=%r." % (b.mode,))
225
 
                child_ie.text_id = b.id
226
 
                child_ie.text_size = b.size
227
 
            else:
228
 
                raise AssertionError(
229
 
                    "Unknown blob kind, perms=%r." % (b.mode,))
230
 
            child_ie.executable = bool(int(b.mode[3:], 8) & 0111)
231
 
            child_ie.revision = self.revision_id
232
 
            self._inventory.add(child_ie)
233
 
            if b.mode[0] == '0':
234
 
                self._build_inventory(b, child_ie, child_path)
235
 
 
236
 
 
237
 
class GitFormat(object):
238
 
 
239
 
    supports_tree_reference = False
240
 
 
241
 
    def get_format_description(self):
242
 
        return "Git Repository"