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repository.py
16
16
 
17
17
"""An adapter between a Git Repository and a Bazaar Branch"""
18
18
 
 
19
import os
 
20
import time
 
21
 
 
22
import bzrlib
19
23
from bzrlib import (
20
24
    deprecated_graph,
 
25
    errors,
 
26
    graph,
 
27
    inventory,
 
28
    osutils,
21
29
    repository,
 
30
    revision,
 
31
    revisiontree,
22
32
    urlutils,
23
 
    )
24
 
 
25
 
from bzrlib.plugins.git import (
26
 
    ids,
27
 
    model,
28
 
    )
29
 
 
30
 
 
31
 
class GitRepository(repository.Repository):
 
33
    versionedfile,
 
34
    )
 
35
from bzrlib.foreign import (
 
36
        ForeignRepository,
 
37
        )
 
38
from bzrlib.trace import mutter
 
39
from bzrlib.transport import get_transport
 
40
 
 
41
from bzrlib.plugins.git.foreign import (
 
42
    versionedfiles,
 
43
    )
 
44
from bzrlib.plugins.git.mapping import default_mapping, mapping_registry
 
45
 
 
46
import dulwich as git
 
47
 
 
48
 
 
49
class GitTags(object):
 
50
 
 
51
    def __init__(self, tags):
 
52
        self._tags = tags
 
53
 
 
54
    def __iter__(self):
 
55
        return iter(self._tags)
 
56
 
 
57
 
 
58
class GitRepository(ForeignRepository):
32
59
    """An adapter to git repositories for bzr."""
33
60
 
 
61
    _serializer = None
 
62
 
34
63
    def __init__(self, gitdir, lockfiles):
35
 
        self.bzrdir = gitdir
36
 
        self.control_files = lockfiles
37
 
        gitdirectory = gitdir.transport.local_abspath('.')
38
 
        self._git = model.GitModel(gitdirectory)
39
 
        self._revision_cache = {}
40
 
 
41
 
    def _ancestor_revisions(self, revision_ids):
42
 
        if revision_ids is not None:
43
 
            git_revisions = [gitrevid_from_bzr(r) for r in revision_ids]
44
 
        else:
45
 
            git_revisions = None
46
 
        for lines in self._git.ancestor_lines(git_revisions):
47
 
            yield self.parse_rev(lines)
 
64
        ForeignRepository.__init__(self, GitFormat(), gitdir, lockfiles)
 
65
        from bzrlib.plugins.git import fetch
 
66
        repository.InterRepository.register_optimiser(fetch.InterGitRepository)
 
67
        repository.InterRepository.register_optimiser(fetch.InterGitNonGitRepository)
48
68
 
49
69
    def is_shared(self):
50
70
        return True
51
71
 
52
 
    def get_revision_graph(self, revision_id=None):
53
 
        result = {}
54
 
        if revision_id is not None:
55
 
            param = [ids.convert_revision_id_bzr_to_git(revision_id)]
56
 
        else:
57
 
            param = None
58
 
        for node, parents in self._git.ancestry(param).iteritems():
59
 
            bzr_node = ids.convert_revision_id_git_to_bzr(node)
60
 
            bzr_parents = [ids.convert_revision_id_git_to_bzr(n)
61
 
                           for n in parents]
62
 
            result[bzr_node] = bzr_parents
63
 
        return result
64
 
 
65
 
    def get_revision_graph_with_ghosts(self, revision_ids=None):
66
 
        graph = deprecated_graph.Graph()
67
 
        if revision_ids is not None:
68
 
            revision_ids = [ids.convert_revision_id_bzr_to_git(r)
69
 
                            for r in revision_ids]
70
 
        for node, parents in self._git.ancestry(revision_ids).iteritems():
71
 
            bzr_node = ids.convert_revision_id_git_to_bzr(node)
72
 
            bzr_parents = [ids.convert_revision_id_git_to_bzr(n)
73
 
                           for n in parents]
74
 
 
75
 
            graph.add_node(bzr_node, bzr_parents)
76
 
        return graph
 
72
    def supports_rich_root(self):
 
73
        return True
 
74
 
 
75
    def _warn_if_deprecated(self):
 
76
        # This class isn't deprecated
 
77
        pass
 
78
 
 
79
    def get_mapping(self):
 
80
        return default_mapping
 
81
 
 
82
    def make_working_trees(self):
 
83
        return True
 
84
 
 
85
 
 
86
class LocalGitRepository(GitRepository):
 
87
 
 
88
    def __init__(self, gitdir, lockfiles):
 
89
        # FIXME: This also caches negatives. Need to be more careful 
 
90
        # about this once we start writing to git
 
91
        self._parents_provider = graph.CachingParentsProvider(self)
 
92
        GitRepository.__init__(self, gitdir, lockfiles)
 
93
        self.base = gitdir.root_transport.base
 
94
        self._git = gitdir._git
 
95
        self.texts = None
 
96
        self.signatures = versionedfiles.VirtualSignatureTexts(self)
 
97
        self.revisions = versionedfiles.VirtualRevisionTexts(self)
 
98
        self.tags = GitTags(self._git.get_tags())
 
99
 
 
100
    def all_revision_ids(self):
 
101
        ret = set([revision.NULL_REVISION])
 
102
        if self._git.heads() == []:
 
103
            return ret
 
104
        bzr_heads = [self.get_mapping().revision_id_foreign_to_bzr(h) for h in self._git.heads()]
 
105
        ret = set(bzr_heads)
 
106
        graph = self.get_graph()
 
107
        for rev, parents in graph.iter_ancestry(bzr_heads):
 
108
            ret.add(rev)
 
109
        return ret
 
110
 
 
111
    #def get_revision_delta(self, revision_id):
 
112
    #    parent_revid = self.get_revision(revision_id).parent_ids[0]
 
113
    #    diff = self._git.diff(ids.convert_revision_id_bzr_to_git(parent_revid),
 
114
    #                   ids.convert_revision_id_bzr_to_git(revision_id))
 
115
 
 
116
    def _make_parents_provider(self):
 
117
        """See Repository._make_parents_provider()."""
 
118
        return self._parents_provider
 
119
 
 
120
    def get_parent_map(self, revids):
 
121
        parent_map = {}
 
122
        mutter("get_parent_map(%r)", revids)
 
123
        for revision_id in revids:
 
124
            assert isinstance(revision_id, str)
 
125
            if revision_id == revision.NULL_REVISION:
 
126
                parent_map[revision_id] = ()
 
127
                continue
 
128
            hexsha, mapping = self.lookup_git_revid(revision_id)
 
129
            commit  = self._git.commit(hexsha)
 
130
            if commit is None:
 
131
                continue
 
132
            else:
 
133
                parent_map[revision_id] = [mapping.revision_id_foreign_to_bzr(p) for p in commit.parents]
 
134
        return parent_map
 
135
 
 
136
    def get_ancestry(self, revision_id, topo_sorted=True):
 
137
        """See Repository.get_ancestry().
 
138
        """
 
139
        if revision_id is None:
 
140
            return self._all_revision_ids()
 
141
        assert isinstance(revision_id, str)
 
142
        ancestry = []
 
143
        graph = self.get_graph()
 
144
        for rev, parents in graph.iter_ancestry([revision_id]):
 
145
            if rev == revision.NULL_REVISION:
 
146
                rev = None
 
147
            ancestry.append(rev)
 
148
        ancestry.reverse()
 
149
        return ancestry
 
150
 
 
151
    def get_signature_text(self, revision_id):
 
152
        raise errors.NoSuchRevision(self, revision_id)
 
153
 
 
154
    def lookup_revision_id(self, revid):
 
155
        """Lookup a revision id.
 
156
        
 
157
        :param revid: Bazaar revision id.
 
158
        :return: Tuple with git revisionid and mapping.
 
159
        """
 
160
        # Yes, this doesn't really work, but good enough as a stub
 
161
        return osutils.sha(rev_id).hexdigest(), self.get_mapping()
 
162
 
 
163
    def has_signature_for_revision_id(self, revision_id):
 
164
        return False
 
165
 
 
166
    def lookup_git_revid(self, bzr_revid):
 
167
        try:
 
168
            return mapping_registry.revision_id_bzr_to_foreign(bzr_revid)
 
169
        except errors.InvalidRevisionId:
 
170
            raise errors.NoSuchRevision(self, bzr_revid)
77
171
 
78
172
    def get_revision(self, revision_id):
79
 
        if revision_id in self._revision_cache:
80
 
            return self._revision_cache[revision_id]
81
 
        raw = self._git.rev_list([gitrevid_from_bzr(revision_id)], max_count=1,
82
 
                                 header=True)
83
 
        return self.parse_rev(raw)
 
173
        git_commit_id, mapping = self.lookup_git_revid(revision_id)
 
174
        try:
 
175
            commit = self._git.commit(git_commit_id)
 
176
        except KeyError:
 
177
            raise errors.NoSuchRevision(self, revision_id)
 
178
        # print "fetched revision:", git_commit_id
 
179
        revision = mapping.import_commit(commit)
 
180
        assert revision is not None
 
181
        return revision
84
182
 
85
183
    def has_revision(self, revision_id):
86
184
        try:
87
185
            self.get_revision(revision_id)
88
 
        except NoSuchRevision:
 
186
        except errors.NoSuchRevision:
89
187
            return False
90
188
        else:
91
189
            return True
92
190
 
93
 
    def get_revisions(self, revisions):
94
 
        return [self.get_revision(r) for r in revisions]
95
 
 
96
 
    def parse_rev(self, raw):
97
 
        # first field is the rev itself.
98
 
        # then its 'field value'
99
 
        # until the EOF??
100
 
        parents = []
101
 
        log = []
102
 
        in_log = False
103
 
        committer = None
104
 
        revision_id = bzrrevid_from_git(raw[0][:-1])
105
 
        for field in raw[1:]:
106
 
            #if field.startswith('author '):
107
 
            #    committer = field[7:]
108
 
            if field.startswith('parent '):
109
 
                parents.append(bzrrevid_from_git(field.split()[1]))
110
 
            elif field.startswith('committer '):
111
 
                commit_fields = field.split()
112
 
                if committer is None:
113
 
                    committer = ' '.join(commit_fields[1:-3])
114
 
                timestamp = commit_fields[-2]
115
 
                timezone = commit_fields[-1]
116
 
            elif field.startswith('tree '):
117
 
                tree_id = field.split()[1]
118
 
            elif in_log:
119
 
                log.append(field[4:])
120
 
            elif field == '\n':
121
 
                in_log = True
122
 
 
123
 
        log = ''.join(log)
124
 
        result = Revision(revision_id)
125
 
        result.parent_ids = parents
126
 
        result.message = log
127
 
        result.inventory_sha1 = ""
128
 
        result.timezone = timezone and int(timezone)
129
 
        result.timestamp = float(timestamp)
130
 
        result.committer = committer
131
 
        result.properties['git-tree-id'] = tree_id
132
 
        return result
 
191
    def get_revisions(self, revids):
 
192
        return [self.get_revision(r) for r in revids]
133
193
 
134
194
    def revision_trees(self, revids):
135
195
        for revid in revids:
136
196
            yield self.revision_tree(revid)
137
197
 
138
198
    def revision_tree(self, revision_id):
 
199
        revision_id = revision.ensure_null(revision_id)
 
200
 
 
201
        if revision_id == revision.NULL_REVISION:
 
202
            inv = inventory.Inventory(root_id=None)
 
203
            inv.revision_id = revision_id
 
204
            return revisiontree.RevisionTree(self, inv, revision_id)
 
205
 
139
206
        return GitRevisionTree(self, revision_id)
140
207
 
141
208
    def get_inventory(self, revision_id):
142
 
        revision = self.get_revision(revision_id)
143
 
        inventory = GitInventory(revision_id)
144
 
        tree_id = revision.properties['git-tree-id']
145
 
        type_map = {'blob': 'file', 'tree': 'directory' }
146
 
        def get_inventory(tree_id, prefix):
147
 
            for perms, type, obj_id, name in self._git.get_inventory(tree_id):
148
 
                full_path = prefix + name
149
 
                if type == 'blob':
150
 
                    text_sha1 = obj_id
151
 
                else:
152
 
                    text_sha1 = None
153
 
                executable = (perms[-3] in ('1', '3', '5', '7'))
154
 
                entry = GitEntry(full_path, type_map[type], revision_id,
155
 
                                 text_sha1, executable)
156
 
                inventory.entries[full_path] = entry
157
 
                if type == 'tree':
158
 
                    get_inventory(obj_id, full_path+'/')
159
 
        get_inventory(tree_id, '')
160
 
        return inventory
161
 
 
162
 
 
163
 
class GitRevisionTree(object):
 
209
        assert revision_id != None
 
210
        return self.revision_tree(revision_id).inventory
 
211
 
 
212
    def set_make_working_trees(self, trees):
 
213
        pass
 
214
 
 
215
    def fetch_objects(self, determine_wants, graph_walker, progress=None):
 
216
        return self._git.fetch_objects(determine_wants, graph_walker, progress)
 
217
 
 
218
 
 
219
class GitRevisionTree(revisiontree.RevisionTree):
164
220
 
165
221
    def __init__(self, repository, revision_id):
166
 
        self.repository = repository
 
222
        self._repository = repository
167
223
        self.revision_id = revision_id
168
 
        self.inventory = repository.get_inventory(revision_id)
169
 
 
170
 
    def get_file(self, file_id):
171
 
        return iterablefile.IterableFile(self.get_file_lines(file_id))
172
 
 
173
 
    def get_file_lines(self, file_id):
174
 
        obj_id = self.inventory[file_id].text_sha1
175
 
        return self.repository._git.cat_file('blob', obj_id)
176
 
 
177
 
    def is_executable(self, file_id):
178
 
        return self.inventory[file_id].executable
179
 
 
180
 
 
181
 
class GitInventory(object):
182
 
 
183
 
    def __init__(self, revision_id):
184
 
        self.entries = {}
185
 
        self.root = GitEntry('', 'directory', revision_id)
186
 
        self.entries[''] = self.root
187
 
 
188
 
    def __getitem__(self, key):
189
 
        return self.entries[key]
190
 
 
191
 
    def iter_entries(self):
192
 
        return iter(sorted(self.entries.items()))
193
 
 
194
 
    def iter_entries_by_dir(self):
195
 
        return self.iter_entries()
196
 
 
197
 
    def __len__(self):
198
 
        return len(self.entries)
199
 
 
200
 
 
201
 
class GitEntry(object):
202
 
 
203
 
    def __init__(self, path, kind, revision, text_sha1=None, executable=False,
204
 
                 text_size=None):
205
 
        self.path = path
206
 
        self.file_id = path
207
 
        self.kind = kind
208
 
        self.executable = executable
209
 
        self.name = osutils.basename(path)
210
 
        if path == '':
211
 
            self.parent_id = None
212
 
        else:
213
 
            self.parent_id = osutils.dirname(path)
214
 
        self.revision = revision
215
 
        self.symlink_target = None
216
 
        self.text_sha1 = text_sha1
217
 
        self.text_size = None
218
 
 
219
 
    def __repr__(self):
220
 
        return "GitEntry(%r, %r, %r, %r)" % (self.path, self.kind,
221
 
                                             self.revision, self.parent_id)
222
 
 
223
 
 
 
224
        assert isinstance(revision_id, str)
 
225
        git_id, self.mapping = repository.lookup_git_revid(revision_id)
 
226
        try:
 
227
            commit = repository._git.commit(git_id)
 
228
        except KeyError, r:
 
229
            raise errors.NoSuchRevision(repository, revision_id)
 
230
        self.tree = commit.tree
 
231
        self._inventory = inventory.Inventory(revision_id=revision_id)
 
232
        self._inventory.root.revision = revision_id
 
233
        self._build_inventory(self.tree, self._inventory.root, "")
 
234
 
 
235
    def get_revision_id(self):
 
236
        return self.revision_id
 
237
 
 
238
    def get_file_text(self, file_id):
 
239
        entry = self._inventory[file_id]
 
240
        if entry.kind == 'directory': return ""
 
241
        return self._repository._git.get_blob(entry.text_id).data
 
242
 
 
243
    def _build_inventory(self, tree_id, ie, path):
 
244
        assert isinstance(path, str)
 
245
        tree = self._repository._git.tree(tree_id)
 
246
        for mode, name, hexsha in tree.entries():
 
247
            basename = name.decode("utf-8")
 
248
            if path == "":
 
249
                child_path = name
 
250
            else:
 
251
                child_path = urlutils.join(path, name)
 
252
            file_id = self.mapping.generate_file_id(child_path)
 
253
            entry_kind = (mode & 0700000) / 0100000
 
254
            if entry_kind == 0:
 
255
                child_ie = inventory.InventoryDirectory(file_id, basename, ie.file_id)
 
256
            elif entry_kind == 1:
 
257
                file_kind = (mode & 070000) / 010000
 
258
                b = self._repository._git.get_blob(hexsha)
 
259
                if file_kind == 0:
 
260
                    child_ie = inventory.InventoryFile(file_id, basename, ie.file_id)
 
261
                    child_ie.text_sha1 = osutils.sha_string(b.data)
 
262
                elif file_kind == 2:
 
263
                    child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)
 
264
                    child_ie.text_sha1 = osutils.sha_string("")
 
265
                else:
 
266
                    raise AssertionError(
 
267
                        "Unknown file kind, perms=%o." % (mode,))
 
268
                child_ie.text_id = b.id
 
269
                child_ie.text_size = len(b.data)
 
270
            else:
 
271
                raise AssertionError(
 
272
                    "Unknown blob kind, perms=%r." % (mode,))
 
273
            fs_mode = mode & 0777
 
274
            child_ie.executable = bool(fs_mode & 0111)
 
275
            child_ie.revision = self.revision_id
 
276
            self._inventory.add(child_ie)
 
277
            if entry_kind == 0:
 
278
                self._build_inventory(hexsha, child_ie, child_path)
 
279
 
 
280
 
 
281
class GitFormat(object):
 
282
 
 
283
    supports_tree_reference = False
 
284
    rich_root_data = True
 
285
 
 
286
    def get_format_description(self):
 
287
        return "Git Repository"
 
288
 
 
289
    def initialize(self, url, shared=False, _internal=False):
 
290
        raise bzr_errors.UninitializableFormat(self)
 
291
 
 
292
    def check_conversion_target(self, target_repo_format):
 
293
        return target_repo_format.rich_root_data