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workingtree.py
 
1
# Copyright (C) 2008 Jelmer Vernooij <jelmer@samba.org>
 
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
 
 
18
"""An adapter between a Git index and a Bazaar Working Tree"""
 
19
 
 
20
 
 
21
from cStringIO import (
 
22
    StringIO,
 
23
    )
 
24
import errno
 
25
from dulwich.index import (
 
26
    Index,
 
27
    )
 
28
from dulwich.objects import (
 
29
    Blob,
 
30
    ZERO_SHA,
 
31
    )
 
32
import os
 
33
import stat
 
34
 
 
35
from bzrlib import (
 
36
    errors,
 
37
    conflicts as _mod_conflicts,
 
38
    ignores,
 
39
    lockable_files,
 
40
    lockdir,
 
41
    osutils,
 
42
    transport,
 
43
    tree,
 
44
    workingtree,
 
45
    )
 
46
from bzrlib.decorators import (
 
47
    needs_read_lock,
 
48
    )
 
49
 
 
50
 
 
51
from bzrlib.plugins.git.dir import (
 
52
    LocalGitDir,
 
53
    )
 
54
from bzrlib.plugins.git.inventory import (
 
55
    GitIndexInventory,
 
56
    )
 
57
from bzrlib.plugins.git.tree import (
 
58
    changes_from_git_changes,
 
59
    tree_delta_from_git_changes,
 
60
    )
 
61
from bzrlib.plugins.git.mapping import (
 
62
    GitFileIdMap,
 
63
    )
 
64
 
 
65
IGNORE_FILENAME = ".gitignore"
 
66
 
 
67
 
 
68
class GitWorkingTree(workingtree.WorkingTree):
 
69
    """A Git working tree."""
 
70
 
 
71
    def __init__(self, bzrdir, repo, branch, index):
 
72
        self.basedir = bzrdir.root_transport.local_abspath('.')
 
73
        self.bzrdir = bzrdir
 
74
        self.repository = repo
 
75
        self.mapping = self.repository.get_mapping()
 
76
        self._branch = branch
 
77
        self._transport = bzrdir.transport
 
78
 
 
79
        self.controldir = self.bzrdir.transport.local_abspath('bzr')
 
80
 
 
81
        try:
 
82
            os.makedirs(self.controldir)
 
83
            os.makedirs(os.path.join(self.controldir, 'lock'))
 
84
        except OSError:
 
85
            pass
 
86
 
 
87
        self._control_files = lockable_files.LockableFiles(
 
88
            transport.get_transport(self.controldir), 'lock', lockdir.LockDir)
 
89
        self._format = GitWorkingTreeFormat()
 
90
        self.index = index
 
91
        self.views = self._make_views()
 
92
        self._rules_searcher = None
 
93
        self._detect_case_handling()
 
94
 
 
95
    def extras(self):
 
96
        """Yield all unversioned files in this WorkingTree.
 
97
        """
 
98
        for (dirpath, dirnames, filenames) in os.walk(self.basedir):
 
99
            if self.bzrdir.is_control_filename(dirpath[len(self.basedir):].strip("/")):
 
100
                continue
 
101
            for filename in filenames:
 
102
                relpath = os.path.join(dirpath[len(self.basedir):].strip("/"), filename)
 
103
                if not relpath in self.index:
 
104
                    yield relpath
 
105
 
 
106
    def unlock(self):
 
107
        # non-implementation specific cleanup
 
108
        self._cleanup()
 
109
 
 
110
        # reverse order of locking.
 
111
        try:
 
112
            return self._control_files.unlock()
 
113
        finally:
 
114
            self.branch.unlock()
 
115
 
 
116
    def _rewrite_index(self):
 
117
        self.index.clear()
 
118
        for path, entry in self._inventory.iter_entries():
 
119
            if entry.kind == "directory":
 
120
                # Git indexes don't contain directories
 
121
                continue
 
122
            if entry.kind == "file":
 
123
                blob = Blob()
 
124
                try:
 
125
                    file, stat_val = self.get_file_with_stat(entry.file_id, path)
 
126
                except (errors.NoSuchFile, IOError):
 
127
                    # TODO: Rather than come up with something here, use the old index
 
128
                    file = StringIO()
 
129
                    from posix import stat_result
 
130
                    stat_val = stat_result((stat.S_IFREG | 0644, 0, 0, 0, 0, 0, 0, 0, 0, 0))
 
131
                blob.set_raw_string(file.read())
 
132
            elif entry.kind == "symlink":
 
133
                blob = Blob()
 
134
                try:
 
135
                    stat_val = os.lstat(self.abspath(path))
 
136
                except (errors.NoSuchFile, OSError):
 
137
                    # TODO: Rather than come up with something here, use the 
 
138
                    # old index
 
139
                    from posix import stat_result
 
140
                    stat_val = stat_result((stat.S_IFLNK, 0, 0, 0, 0, 0, 0, 0, 0, 0))
 
141
                blob.set_raw_string(self.get_symlink_target(entry.file_id).encode("utf-8"))
 
142
            else:
 
143
                raise AssertionError("unknown kind '%s'" % entry.kind)
 
144
            # Add object to the repository if it didn't exist yet
 
145
            if not blob.id in self.repository._git.object_store:
 
146
                self.repository._git.object_store.add_object(blob)
 
147
            # Add an entry to the index or update the existing entry
 
148
            flags = 0 # FIXME
 
149
            self.index[path.encode("utf-8")] = (stat_val.st_ctime, stat_val.st_mtime, stat_val.st_dev, stat_val.st_ino, stat_val.st_mode, stat_val.st_uid, stat_val.st_gid, stat_val.st_size, blob.id, flags)
 
150
 
 
151
    def flush(self):
 
152
        # TODO: Maybe this should only write on dirty ?
 
153
        if self._control_files._lock_mode != 'w':
 
154
            raise errors.NotWriteLocked(self)
 
155
        self._rewrite_index()
 
156
        self.index.write()
 
157
        self._inventory_is_modified = False
 
158
 
 
159
    def get_ignore_list(self):
 
160
        ignoreset = getattr(self, '_ignoreset', None)
 
161
        if ignoreset is not None:
 
162
            return ignoreset
 
163
 
 
164
        ignore_globs = set()
 
165
        ignore_globs.update(ignores.get_runtime_ignores())
 
166
        ignore_globs.update(ignores.get_user_ignores())
 
167
        if self.has_filename(IGNORE_FILENAME):
 
168
            f = self.get_file_byname(IGNORE_FILENAME)
 
169
            try:
 
170
                ignore_globs.update(ignores.parse_ignore_file(f))
 
171
            finally:
 
172
                f.close()
 
173
        self._ignoreset = ignore_globs
 
174
        return ignore_globs
 
175
 
 
176
    def set_last_revision(self, revid):
 
177
        self._change_last_revision(revid)
 
178
 
 
179
    def _reset_data(self):
 
180
        self._inventory_is_modified = False
 
181
        try:
 
182
            head = self.repository._git.head()
 
183
        except KeyError, name:
 
184
            raise errors.NotBranchError("branch %s at %s" % (name, self.repository.base))
 
185
        basis_inv = self.repository.get_inventory(self.branch.lookup_foreign_revision_id(head))
 
186
        store = self.repository._git.object_store
 
187
        if head == ZERO_SHA:
 
188
            fileid_map = GitFileIdMap({}, self.mapping)
 
189
            basis_inv = None
 
190
        else:
 
191
            fileid_map = self.mapping.get_fileid_map(store.__getitem__,
 
192
                store[head].tree)
 
193
        result = GitIndexInventory(basis_inv, fileid_map, self.index, store)
 
194
        self._set_inventory(result, dirty=False)
 
195
 
 
196
    @needs_read_lock
 
197
    def get_file_sha1(self, file_id, path=None, stat_value=None):
 
198
        if not path:
 
199
            path = self._inventory.id2path(file_id)
 
200
        try:
 
201
            return osutils.sha_file_by_name(self.abspath(path).encode(osutils._fs_enc))
 
202
        except OSError, (num, msg):
 
203
            if num in (errno.EISDIR, errno.ENOENT):
 
204
                return None
 
205
            raise
 
206
 
 
207
    def revision_tree(self, revid):
 
208
        return self.repository.revision_tree(revid)
 
209
 
 
210
    @needs_read_lock
 
211
    def conflicts(self):
 
212
        # FIXME:
 
213
        return _mod_conflicts.ConflictList()
 
214
 
 
215
 
 
216
class GitWorkingTreeFormat(workingtree.WorkingTreeFormat):
 
217
 
 
218
    @property
 
219
    def _matchingbzrdir(self):
 
220
        from bzrlib.plugins.git.dir import LocalGitControlDirFormat
 
221
        return LocalGitControlDirFormat()
 
222
 
 
223
    def get_format_description(self):
 
224
        return "Git Working Tree"
 
225
 
 
226
    def initialize(self, a_bzrdir, revision_id=None, from_branch=None,
 
227
                   accelerator_tree=None, hardlink=False):
 
228
        """See WorkingTreeFormat.initialize()."""
 
229
        if not isinstance(a_bzrdir, LocalGitDir):
 
230
            raise errors.IncompatibleFormat(self, a_bzrdir)
 
231
        index = Index(a_bzrdir.root_transport.local_abspath(".git/index"))
 
232
        index.write()
 
233
        return GitWorkingTree(a_bzrdir, a_bzrdir.open_repository(),
 
234
            a_bzrdir.open_branch(), index)
 
235
 
 
236
 
 
237
class InterIndexGitTree(tree.InterTree):
 
238
    """InterTree that works between a Git revision tree and an index."""
 
239
 
 
240
    def __init__(self, source, target):
 
241
        super(InterIndexGitTree, self).__init__(source, target)
 
242
        self._index = target.index
 
243
 
 
244
    @classmethod
 
245
    def is_compatible(cls, source, target):
 
246
        from bzrlib.plugins.git.repository import GitRevisionTree
 
247
        return (isinstance(source, GitRevisionTree) and 
 
248
                isinstance(target, GitWorkingTree))
 
249
 
 
250
    def compare(self, want_unchanged=False, specific_files=None,
 
251
                extra_trees=None, require_versioned=False, include_root=False,
 
252
                want_unversioned=False):
 
253
        changes = self._index.changes_from_tree(
 
254
            self.source._repository._git.object_store, self.source.tree, 
 
255
            want_unchanged=want_unchanged)
 
256
        source_fileid_map = self.source.mapping.get_fileid_map(
 
257
            self.source._repository._git.object_store.__getitem__,
 
258
            self.source.tree)
 
259
        if self.target.mapping.BZR_FILE_IDS_FILE is not None:
 
260
            file_id = self.target.path2id(
 
261
                self.target.mapping.BZR_FILE_IDS_FILE)
 
262
            if file_id is None:
 
263
                target_fileid_map = {}
 
264
            else:
 
265
                target_fileid_map = self.target.mapping.import_fileid_map(Blob.from_string(self.target.get_file_text(file_id)))
 
266
        else:
 
267
            target_fileid_map = {}
 
268
        target_fileid_map = GitFileIdMap(target_fileid_map, self.target.mapping)
 
269
        ret = tree_delta_from_git_changes(changes, self.target.mapping,
 
270
            (source_fileid_map, target_fileid_map),
 
271
            specific_file=specific_files, require_versioned=require_versioned)
 
272
        if want_unversioned:
 
273
            for e in self.target.extras():
 
274
                ret.unversioned.append((e, None, osutils.file_kind(self.target.abspath(e))))
 
275
        return ret
 
276
 
 
277
    def iter_changes(self, include_unchanged=False, specific_files=None,
 
278
        pb=None, extra_trees=[], require_versioned=True, want_unversioned=False):
 
279
        changes = self._index.changes_from_tree(
 
280
            self.source._repository._git.object_store, self.source.tree,
 
281
            want_unchanged=include_unchanged)
 
282
        # FIXME: Handle want_unversioned
 
283
        return changes_from_git_changes(changes, self.target.mapping,
 
284
            specific_file=specific_files)
 
285
 
 
286
 
 
287
tree.InterTree.register_optimiser(InterIndexGitTree)