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breezy/git/commit.py
 
1
# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>
 
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
17
 
 
18
"""Support for committing in native Git working trees."""
 
19
 
 
20
from __future__ import absolute_import
 
21
 
 
22
from dulwich.index import (
 
23
    commit_tree,
 
24
    )
 
25
import stat
 
26
 
 
27
from .. import (
 
28
    config as _mod_config,
 
29
    gpg,
 
30
    osutils,
 
31
    revision as _mod_revision,
 
32
    )
 
33
from ..errors import (
 
34
    BzrError,
 
35
    RootMissing,
 
36
    UnsupportedOperation,
 
37
    )
 
38
from ..repository import (
 
39
    CommitBuilder,
 
40
    )
 
41
from ..sixish import (
 
42
    viewitems,
 
43
    )
 
44
 
 
45
from dulwich.objects import (
 
46
    Blob,
 
47
    Commit,
 
48
    )
 
49
from dulwich.index import read_submodule_head
 
50
 
 
51
 
 
52
from .mapping import (
 
53
    object_mode,
 
54
    fix_person_identifier,
 
55
    )
 
56
from .tree import entry_factory
 
57
 
 
58
 
 
59
class SettingCustomFileIdsUnsupported(UnsupportedOperation):
 
60
 
 
61
    _fmt = ("Unable to store addition of file with custom file ids: "
 
62
            "%(file_ids)r")
 
63
 
 
64
    def __init__(self, file_ids):
 
65
        BzrError.__init__(self)
 
66
        self.file_ids = file_ids
 
67
 
 
68
 
 
69
class GitCommitBuilder(CommitBuilder):
 
70
    """Commit builder for Git repositories."""
 
71
 
 
72
    supports_record_entry_contents = False
 
73
 
 
74
    def __init__(self, *args, **kwargs):
 
75
        super(GitCommitBuilder, self).__init__(*args, **kwargs)
 
76
        self.random_revid = True
 
77
        self._validate_revprops(self._revprops)
 
78
        self.store = self.repository._git.object_store
 
79
        self._blobs = {}
 
80
        self._inv_delta = []
 
81
        self._any_changes = False
 
82
        self._override_fileids = {}
 
83
        self._mapping = self.repository.get_mapping()
 
84
 
 
85
    def any_changes(self):
 
86
        return self._any_changes
 
87
 
 
88
    def record_iter_changes(self, workingtree, basis_revid, iter_changes):
 
89
        seen_root = False
 
90
        for (file_id, path, changed_content, versioned, parent, name, kind,
 
91
             executable) in iter_changes:
 
92
            if kind[1] in ("directory",):
 
93
                self._inv_delta.append(
 
94
                    (path[0], path[1], file_id, entry_factory[kind[1]](
 
95
                        file_id, name[1], parent[1])))
 
96
                if kind[0] in ("file", "symlink"):
 
97
                    self._blobs[path[0].encode("utf-8")] = None
 
98
                    self._any_changes = True
 
99
                if path[1] == "":
 
100
                    seen_root = True
 
101
                continue
 
102
            self._any_changes = True
 
103
            if path[1] is None:
 
104
                self._inv_delta.append((path[0], path[1], file_id, None))
 
105
                self._blobs[path[0].encode("utf-8")] = None
 
106
                continue
 
107
            try:
 
108
                entry_kls = entry_factory[kind[1]]
 
109
            except KeyError:
 
110
                raise KeyError("unknown kind %s" % kind[1])
 
111
            entry = entry_kls(file_id, name[1], parent[1])
 
112
            if kind[1] == "file":
 
113
                entry.executable = executable[1]
 
114
                blob = Blob()
 
115
                f, st = workingtree.get_file_with_stat(path[1], file_id)
 
116
                try:
 
117
                    blob.data = f.read()
 
118
                finally:
 
119
                    f.close()
 
120
                entry.text_size = len(blob.data)
 
121
                entry.text_sha1 = osutils.sha_string(blob.data)
 
122
                self.store.add_object(blob)
 
123
                sha = blob.id
 
124
            elif kind[1] == "symlink":
 
125
                symlink_target = workingtree.get_symlink_target(
 
126
                    path[1], file_id)
 
127
                blob = Blob()
 
128
                blob.data = symlink_target.encode("utf-8")
 
129
                self.store.add_object(blob)
 
130
                sha = blob.id
 
131
                entry.symlink_target = symlink_target
 
132
                st = None
 
133
            elif kind[1] == "tree-reference":
 
134
                sha = read_submodule_head(workingtree.abspath(path[1]))
 
135
                reference_revision = workingtree.get_reference_revision(
 
136
                    path[1], file_id)
 
137
                entry.reference_revision = reference_revision
 
138
                st = None
 
139
            else:
 
140
                raise AssertionError("Unknown kind %r" % kind[1])
 
141
            mode = object_mode(kind[1], executable[1])
 
142
            self._inv_delta.append((path[0], path[1], file_id, entry))
 
143
            encoded_new_path = path[1].encode("utf-8")
 
144
            self._blobs[encoded_new_path] = (mode, sha)
 
145
            if st is not None:
 
146
                yield file_id, path[1], (entry.text_sha1, st)
 
147
            if self._mapping.generate_file_id(encoded_new_path) != file_id:
 
148
                self._override_fileids[encoded_new_path] = file_id
 
149
            else:
 
150
                self._override_fileids[encoded_new_path] = None
 
151
        if not seen_root and len(self.parents) == 0:
 
152
            raise RootMissing()
 
153
        if getattr(workingtree, "basis_tree", False):
 
154
            basis_tree = workingtree.basis_tree()
 
155
        else:
 
156
            if len(self.parents) == 0:
 
157
                basis_revid = _mod_revision.NULL_REVISION
 
158
            else:
 
159
                basis_revid = self.parents[0]
 
160
            basis_tree = self.repository.revision_tree(basis_revid)
 
161
        # Fill in entries that were not changed
 
162
        for entry in basis_tree._iter_tree_contents(include_trees=False):
 
163
            if entry.path in self._blobs:
 
164
                continue
 
165
            self._blobs[entry.path] = (entry.mode, entry.sha)
 
166
        if not self._lossy:
 
167
            try:
 
168
                fileid_map = dict(basis_tree._fileid_map.file_ids)
 
169
            except AttributeError:
 
170
                fileid_map = {}
 
171
            for path, file_id in viewitems(self._override_fileids):
 
172
                if not isinstance(path, bytes):
 
173
                    raise TypeError(path)
 
174
                if file_id is None:
 
175
                    if path in fileid_map:
 
176
                        del fileid_map[path]
 
177
                else:
 
178
                    if not isinstance(file_id, bytes):
 
179
                        raise TypeError(file_id)
 
180
                    fileid_map[path] = file_id
 
181
            if fileid_map:
 
182
                fileid_blob = self._mapping.export_fileid_map(fileid_map)
 
183
            else:
 
184
                fileid_blob = None
 
185
            if fileid_blob is not None:
 
186
                if self._mapping.BZR_FILE_IDS_FILE is None:
 
187
                    raise SettingCustomFileIdsUnsupported(fileid_map)
 
188
                self.store.add_object(fileid_blob)
 
189
                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = (
 
190
                    stat.S_IFREG | 0o644, fileid_blob.id)
 
191
            else:
 
192
                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = None
 
193
        self.new_inventory = None
 
194
 
 
195
    def update_basis(self, tree):
 
196
        # Nothing to do here
 
197
        pass
 
198
 
 
199
    def finish_inventory(self):
 
200
        # eliminate blobs that were removed
 
201
        self._blobs = {k: v for (k, v) in viewitems(
 
202
            self._blobs) if v is not None}
 
203
 
 
204
    def _iterblobs(self):
 
205
        return ((path, sha, mode) for (path, (mode, sha))
 
206
                in viewitems(self._blobs))
 
207
 
 
208
    def commit(self, message):
 
209
        self._validate_unicode_text(message, 'commit message')
 
210
        c = Commit()
 
211
        c.parents = [self.repository.lookup_bzr_revision_id(
 
212
            revid)[0] for revid in self.parents]
 
213
        c.tree = commit_tree(self.store, self._iterblobs())
 
214
        encoding = self._revprops.pop(u'git-explicit-encoding', 'utf-8')
 
215
        c.encoding = encoding.encode('ascii')
 
216
        c.committer = fix_person_identifier(self._committer.encode(encoding))
 
217
        try:
 
218
            author = self._revprops.pop('author')
 
219
        except KeyError:
 
220
            try:
 
221
                authors = self._revprops.pop('authors').splitlines()
 
222
            except KeyError:
 
223
                author = self._committer
 
224
            else:
 
225
                if len(authors) > 1:
 
226
                    raise Exception("Unable to convert multiple authors")
 
227
                elif len(authors) == 0:
 
228
                    author = self._committer
 
229
                else:
 
230
                    author = authors[0]
 
231
        c.author = fix_person_identifier(author.encode(encoding))
 
232
        if self._revprops:
 
233
            raise NotImplementedError(self._revprops)
 
234
        c.commit_time = int(self._timestamp)
 
235
        c.author_time = int(self._timestamp)
 
236
        c.commit_timezone = self._timezone
 
237
        c.author_timezone = self._timezone
 
238
        c.message = message.encode(encoding)
 
239
        if (self._config_stack.get('create_signatures') ==
 
240
                _mod_config.SIGN_ALWAYS):
 
241
            strategy = gpg.GPGStrategy(self._config_stack)
 
242
            c.gpgsig = strategy.sign(c.as_raw_string(), gpg.MODE_DETACH)
 
243
        self.store.add_object(c)
 
244
        self.repository.commit_write_group()
 
245
        self._new_revision_id = self._mapping.revision_id_foreign_to_bzr(c.id)
 
246
        return self._new_revision_id
 
247
 
 
248
    def abort(self):
 
249
        if self.repository.is_in_write_group():
 
250
            self.repository.abort_write_group()
 
251
 
 
252
    def revision_tree(self):
 
253
        return self.repository.revision_tree(self._new_revision_id)
 
254
 
 
255
    def get_basis_delta(self):
 
256
        # TODO(jelmer): remove this logic when lp:~jelmer/brz/remaining lands
 
257
        for (oldpath, newpath, file_id, entry) in self._inv_delta:
 
258
            if entry is not None:
 
259
                entry.revision = self._new_revision_id
 
260
        return self._inv_delta
 
261
 
 
262
    def update_basis_by_delta(self, revid, delta):
 
263
        pass