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repository.py
 
1
# Copyright (C) 2007 Canonical Ltd
 
2
#
 
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# 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
 
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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.
 
12
#
 
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# 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"