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# Copyright (C) 2009-2010 Jelmer Vernooij <jelmer@samba.org>
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# 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.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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"""Support for committing in native Git working trees."""
 
19
 
 
20
 
 
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from dulwich.index import (
 
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    commit_tree,
 
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    )
 
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import stat
 
25
 
 
26
from bzrlib import (
 
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    revision as _mod_revision,
 
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    )
 
29
from bzrlib.errors import (
 
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    RootMissing,
 
31
    )
 
32
from bzrlib.repository import (
 
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    CommitBuilder,
 
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    )
 
35
 
 
36
from dulwich.objects import (
 
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    S_IFGITLINK,
 
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    Blob,
 
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    Commit,
 
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    )
 
41
 
 
42
 
 
43
from bzrlib.plugins.git.mapping import (
 
44
    entry_mode,
 
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    )
 
46
from bzrlib.plugins.git.roundtrip import (
 
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    CommitSupplement,
 
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    inject_bzr_metadata,
 
49
    )
 
50
 
 
51
 
 
52
class GitCommitBuilder(CommitBuilder):
 
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    """Commit builder for Git repositories."""
 
54
 
 
55
    supports_record_entry_contents = False
 
56
 
 
57
    def __init__(self, *args, **kwargs):
 
58
        super(GitCommitBuilder, self).__init__(*args, **kwargs)
 
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        self._validate_revprops(self._revprops)
 
60
        self.store = self.repository._git.object_store
 
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        self._blobs = {}
 
62
        self._any_changes = False
 
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        self._will_record_deletes = False
 
64
        self._override_fileids = {}
 
65
        self._mapping = self.repository.get_mapping()
 
66
 
 
67
    def any_changes(self):
 
68
        return self._any_changes
 
69
 
 
70
    def record_entry_contents(self, ie, parent_invs, path, tree,
 
71
        content_summary):
 
72
        raise NotImplementedError(self.record_entry_contents)
 
73
 
 
74
    def record_delete(self, path, file_id):
 
75
        assert type(path) == str
 
76
        self._override_fileids[path] = None
 
77
        self._blobs[path] = None
 
78
        self._any_changes = True
 
79
 
 
80
    def record_iter_changes(self, workingtree, basis_revid, iter_changes):
 
81
        index = getattr(workingtree, "index", None)
 
82
        if index is not None:
 
83
            def index_sha1(path, file_id):
 
84
                return index.get_sha1(path.encode("utf-8"))
 
85
            text_sha1 = link_sha1 = index_sha1
 
86
        else:
 
87
            def link_sha1(path, file_id):
 
88
                blob = Blob()
 
89
                blob.data = workingtree.get_symlink_target(file_id, path)
 
90
                return blob.id
 
91
            def text_sha1(path, file_id):
 
92
                blob = Blob()
 
93
                blob.data = workingtree.get_file_text(file_id, path)
 
94
                return blob.id
 
95
        seen_root = False
 
96
        for (file_id, path, changed_content, versioned, parent, name, kind,
 
97
             executable) in iter_changes:
 
98
            if kind[1] in ("directory",):
 
99
                if kind[0] in ("file", "symlink"):
 
100
                    self.record_delete(path[0].encode("utf-8"), file_id)
 
101
                if path[1] == "":
 
102
                    seen_root = True
 
103
                continue
 
104
            if path[1] is None:
 
105
                self.record_delete(path[0].encode("utf-8"), file_id)
 
106
                continue
 
107
            if kind[1] == "file":
 
108
                mode = stat.S_IFREG
 
109
                sha = text_sha1(path[1], file_id)
 
110
            elif kind[1] == "symlink":
 
111
                mode = stat.S_IFLNK
 
112
                sha = link_sha1(path[1], file_id)
 
113
            elif kind[1] == "tree-reference":
 
114
                mode = S_IFGITLINK
 
115
                sha = "FIXME" # FIXME
 
116
            else:
 
117
                raise AssertionError("Unknown kind %r" % kind[1])
 
118
            if executable[1]:
 
119
                mode |= 0111
 
120
            self._any_changes = True
 
121
            encoded_new_path = path[1].encode("utf-8")
 
122
            self._blobs[encoded_new_path] = (mode, sha)
 
123
            file_sha1 = workingtree.get_file_sha1(file_id, path[1])
 
124
            if file_sha1 is None:
 
125
                # File no longer exists
 
126
                if path[0] is not None:
 
127
                    self.record_delete(path[0].encode("utf-8"), file_id)
 
128
                continue
 
129
            _, st = workingtree.get_file_with_stat(file_id, path[1])
 
130
            yield file_id, path[1], (file_sha1, st)
 
131
            self._override_fileids[encoded_new_path] = file_id
 
132
        if not seen_root and len(self.parents) == 0:
 
133
            raise RootMissing()
 
134
        if getattr(workingtree, "basis_tree", False):
 
135
            basis_tree = workingtree.basis_tree()
 
136
        else:
 
137
            if len(self.parents) == 0:
 
138
                basis_revid = _mod_revision.NULL_REVISION
 
139
            else:
 
140
                basis_revid = self.parents[0]
 
141
            basis_tree = self.repository.revision_tree(basis_revid)
 
142
        # Fill in entries that were not changed
 
143
        for path, entry in basis_tree.iter_entries_by_dir():
 
144
            if entry.kind not in ("file", "symlink"):
 
145
                continue
 
146
            if not path in self._blobs:
 
147
                blob = Blob()
 
148
                if entry.kind == "symlink":
 
149
                    blob.data = basis_tree.get_symlink_target(entry.file_id,
 
150
                        path)
 
151
                else:
 
152
                    blob.data = basis_tree.get_file_text(entry.file_id, path)
 
153
                self._blobs[path.encode("utf-8")] = (entry_mode(entry), blob.id)
 
154
        if not self._lossy and self._mapping.BZR_FILE_IDS_FILE is not None:
 
155
            try:
 
156
                fileid_map = dict(basis_tree._fileid_map.file_ids)
 
157
            except AttributeError:
 
158
                fileid_map = {}
 
159
            for path, file_id in self._override_fileids.iteritems():
 
160
                assert type(path) == str
 
161
                if file_id is None:
 
162
                    del fileid_map[path]
 
163
                else:
 
164
                    assert type(file_id) == str
 
165
                    fileid_map[path] = file_id
 
166
            if fileid_map:
 
167
                fileid_blob = self._mapping.export_fileid_map(fileid_map)
 
168
                self.store.add_object(fileid_blob)
 
169
                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = (stat.S_IFREG | 0644, fileid_blob.id)
 
170
            else:
 
171
                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = None
 
172
        self.new_inventory = None
 
173
 
 
174
    def get_basis_delta(self):
 
175
        if not self._will_record_deletes:
 
176
            raise AssertionError
 
177
        # FIXME
 
178
        return []
 
179
 
 
180
    def finish_inventory(self):
 
181
        # eliminate blobs that were removed
 
182
        for path, entry in iter(self._blobs.items()):
 
183
            if entry is None:
 
184
                del self._blobs[path]
 
185
 
 
186
    def _iterblobs(self):
 
187
        return ((path, sha, mode) for (path, (mode, sha)) in self._blobs.iteritems())
 
188
 
 
189
    def commit(self, message):
 
190
        self._validate_unicode_text(message, 'commit message')
 
191
        c = Commit()
 
192
        c.parents = [self.repository.lookup_bzr_revision_id(revid)[0] for revid in self.parents]
 
193
        c.tree = commit_tree(self.store, self._iterblobs())
 
194
        c.committer = self._committer
 
195
        c.author = self._revprops.get('author', self._committer)
 
196
        if c.author != c.committer:
 
197
            self._revprops.remove("author")
 
198
        c.commit_time = int(self._timestamp)
 
199
        c.author_time = int(self._timestamp)
 
200
        c.commit_timezone = self._timezone
 
201
        c.author_timezone = self._timezone
 
202
        c.encoding = 'utf-8'
 
203
        c.message = message.encode("utf-8")
 
204
        if not self._lossy:
 
205
            commit_supplement = CommitSupplement()
 
206
            commit_supplement.revision_id = self._new_revision_id
 
207
            commit_supplement.properties = self._revprops
 
208
            commit_supplement.explicit_parent_ids = self.parents
 
209
            if commit_supplement:
 
210
                c.message = inject_bzr_metadata(c.message, commit_supplement, "utf-8")
 
211
 
 
212
        assert len(c.id) == 40
 
213
        if self._new_revision_id is None:
 
214
            self._new_revision_id = self.mapping.revision_id_foreign_to_bzr(c.id)
 
215
        self.store.add_object(c)
 
216
        self.repository.commit_write_group()
 
217
        return self._new_revision_id
 
218
 
 
219
    def abort(self):
 
220
        self.repository.abort_write_group()
 
221
 
 
222
    def will_record_deletes(self):
 
223
        self._will_record_deletes = True
 
224
 
 
225
    def revision_tree(self):
 
226
        return self.repository.revision_tree(self._new_revision_id)