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  • Committer: Jelmer Vernooij
  • Date: 2010-05-13 08:40:18 UTC
  • mto: (0.200.912 trunk)
  • mto: This revision was merged to the branch mainline in revision 6960.
  • Revision ID: jelmer@samba.org-20100513084018-xp9tbrasde6gih3o
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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.objects import (
 
26
    Blob,
 
27
    )
 
28
import os
 
29
import stat
 
30
 
 
31
from bzrlib import (
 
32
    errors,
 
33
    ignores,
 
34
    lockable_files,
 
35
    lockdir,
 
36
    osutils,
 
37
    transport,
 
38
    tree,
 
39
    workingtree,
 
40
    )
 
41
from bzrlib.decorators import (
 
42
    needs_read_lock,
 
43
    )
 
44
 
 
45
 
 
46
from bzrlib.plugins.git.inventory import (
 
47
    GitIndexInventory,
 
48
    )
 
49
from bzrlib.plugins.git.mapping import (
 
50
    GitFileIdMap,
 
51
    )
 
52
from bzrlib.plugins.git.tree import (
 
53
    changes_from_git_changes,
 
54
    tree_delta_from_git_changes,
 
55
    )
 
56
 
 
57
 
 
58
IGNORE_FILENAME = ".gitignore"
 
59
 
 
60
 
 
61
class GitWorkingTree(workingtree.WorkingTree):
 
62
    """A Git working tree."""
 
63
 
 
64
    def __init__(self, bzrdir, repo, branch, index):
 
65
        self.basedir = bzrdir.root_transport.local_abspath('.')
 
66
        self.bzrdir = bzrdir
 
67
        self.repository = repo
 
68
        self.mapping = self.repository.get_mapping()
 
69
        self._branch = branch
 
70
        self._transport = bzrdir.transport
 
71
 
 
72
        self.controldir = self.bzrdir.transport.local_abspath('bzr')
 
73
 
 
74
        try:
 
75
            os.makedirs(self.controldir)
 
76
            os.makedirs(os.path.join(self.controldir, 'lock'))
 
77
        except OSError:
 
78
            pass
 
79
 
 
80
        self._control_files = lockable_files.LockableFiles(
 
81
            transport.get_transport(self.controldir), 'lock', lockdir.LockDir)
 
82
        self._format = GitWorkingTreeFormat()
 
83
        self.index = index
 
84
        self.views = self._make_views()
 
85
        self._detect_case_handling()
 
86
 
 
87
    def extras(self):
 
88
        """Yield all unversioned files in this WorkingTree.
 
89
        """
 
90
        for (dirpath, dirnames, filenames) in os.walk(self.basedir):
 
91
            if self.bzrdir.is_control_filename(dirpath[len(self.basedir):].strip("/")):
 
92
                continue
 
93
            for filename in filenames:
 
94
                relpath = os.path.join(dirpath[len(self.basedir):].strip("/"), filename)
 
95
                if not relpath in self.index:
 
96
                    yield relpath
 
97
 
 
98
 
 
99
    def unlock(self):
 
100
        # non-implementation specific cleanup
 
101
        self._cleanup()
 
102
 
 
103
        # reverse order of locking.
 
104
        try:
 
105
            return self._control_files.unlock()
 
106
        finally:
 
107
            self.branch.unlock()
 
108
 
 
109
    def is_control_filename(self, path):
 
110
        return os.path.basename(path) == ".git"
 
111
 
 
112
    def _rewrite_index(self):
 
113
        self.index.clear()
 
114
        for path, entry in self._inventory.iter_entries():
 
115
            if entry.kind == "directory":
 
116
                # Git indexes don't contain directories
 
117
                continue
 
118
            if entry.kind == "file":
 
119
                blob = Blob()
 
120
                try:
 
121
                    file, stat_val = self.get_file_with_stat(entry.file_id, path)
 
122
                except (errors.NoSuchFile, IOError):
 
123
                    # TODO: Rather than come up with something here, use the old index
 
124
                    file = StringIO()
 
125
                    from posix import stat_result
 
126
                    stat_val = stat_result((stat.S_IFREG | 0644, 0, 0, 0, 0, 0, 0, 0, 0, 0))
 
127
                blob.set_raw_string(file.read())
 
128
            elif entry.kind == "symlink":
 
129
                blob = Blob()
 
130
                try:
 
131
                    stat_val = os.lstat(self.abspath(path))
 
132
                except (errors.NoSuchFile, OSError):
 
133
                    # TODO: Rather than come up with something here, use the 
 
134
                    # old index
 
135
                    from posix import stat_result
 
136
                    stat_val = stat_result((stat.S_IFLNK, 0, 0, 0, 0, 0, 0, 0, 0, 0))
 
137
                blob.set_raw_string(entry.symlink_target)
 
138
            else:
 
139
                raise AssertionError("unknown kind '%s'" % entry.kind)
 
140
            # Add object to the repository if it didn't exist yet
 
141
            if not blob.id in self.repository._git.object_store:
 
142
                self.repository._git.object_store.add_object(blob)
 
143
            # Add an entry to the index or update the existing entry
 
144
            flags = 0 # FIXME
 
145
            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)
 
146
 
 
147
    def flush(self):
 
148
        # TODO: Maybe this should only write on dirty ?
 
149
        if self._control_files._lock_mode != 'w':
 
150
            raise errors.NotWriteLocked(self)
 
151
        self._rewrite_index()           
 
152
        self.index.write()
 
153
        self._inventory_is_modified = False
 
154
 
 
155
    def get_ignore_list(self):
 
156
        ignoreset = getattr(self, '_ignoreset', None)
 
157
        if ignoreset is not None:
 
158
            return ignoreset
 
159
 
 
160
        ignore_globs = set()
 
161
        ignore_globs.update(ignores.get_runtime_ignores())
 
162
        ignore_globs.update(ignores.get_user_ignores())
 
163
        if self.has_filename(IGNORE_FILENAME):
 
164
            f = self.get_file_byname(IGNORE_FILENAME)
 
165
            try:
 
166
                ignore_globs.update(ignores.parse_ignore_file(f))
 
167
            finally:
 
168
                f.close()
 
169
        self._ignoreset = ignore_globs
 
170
        return ignore_globs
 
171
 
 
172
    def set_last_revision(self, revid):
 
173
        self._change_last_revision(revid)
 
174
 
 
175
    def _reset_data(self):
 
176
        self._inventory_is_modified = False
 
177
        try:
 
178
            head = self.repository._git.head()
 
179
        except KeyError, name:
 
180
            raise errors.NotBranchError("branch %s at %s" % (name, self.repository.base))
 
181
        basis_inv = self.repository.get_inventory(self.mapping.revision_id_foreign_to_bzr(head))
 
182
        store = self.repository._git.object_store
 
183
        commit = store[head]
 
184
        try:
 
185
            file_id_map_sha = store[commit.tree][self.mapping.BZR_FILE_IDS_FILE][1]
 
186
        except KeyError:
 
187
            file_ids = {}
 
188
        else:
 
189
            file_ids = self.mapping.import_fileid_map(store[file_id_map_sha])
 
190
        fileid_map = GitFileIdMap(file_ids, self.mapping)
 
191
        result = GitIndexInventory(basis_inv, fileid_map, self.index, store)
 
192
        self._set_inventory(result, dirty=False)
 
193
 
 
194
    @needs_read_lock
 
195
    def get_file_sha1(self, file_id, path=None, stat_value=None):
 
196
        if not path:
 
197
            path = self._inventory.id2path(file_id)
 
198
        try:
 
199
            return osutils.sha_file_by_name(self.abspath(path).encode(osutils._fs_enc))
 
200
        except OSError, (num, msg):
 
201
            if num in (errno.EISDIR, errno.ENOENT):
 
202
                return None
 
203
            raise
 
204
 
 
205
    def revision_tree(self, revid):
 
206
        return self.repository.revision_tree(revid)
 
207
 
 
208
    @needs_read_lock
 
209
    def conflicts(self):
 
210
        # FIXME:
 
211
        return []
 
212
 
 
213
 
 
214
class GitWorkingTreeFormat(workingtree.WorkingTreeFormat):
 
215
 
 
216
    @property
 
217
    def _matchingbzrdir(self):
 
218
        from bzrlib.plugins.git import LocalGitBzrDirFormat
 
219
        return LocalGitBzrDirFormat()
 
220
 
 
221
    def get_format_description(self):
 
222
        return "Git Working Tree"
 
223
 
 
224
 
 
225
class InterIndexGitTree(tree.InterTree):
 
226
    """InterTree that works between a Git revision tree and an index."""
 
227
 
 
228
    def __init__(self, source, target):
 
229
        super(InterIndexGitTree, self).__init__(source, target)
 
230
        self._index = target.index
 
231
 
 
232
    @classmethod
 
233
    def is_compatible(cls, source, target):
 
234
        from bzrlib.plugins.git.repository import GitRevisionTree
 
235
        return (isinstance(source, GitRevisionTree) and 
 
236
                isinstance(target, GitWorkingTree))
 
237
 
 
238
    def compare(self, want_unchanged=False, specific_files=None,
 
239
                extra_trees=None, require_versioned=False, include_root=False,
 
240
                want_unversioned=False):
 
241
        changes = self._index.changes_from_tree(
 
242
            self.source._repository._git.object_store, self.source.tree, 
 
243
            want_unchanged=want_unchanged)
 
244
        ret = tree_delta_from_git_changes(changes, self.target.mapping, 
 
245
            specific_file=specific_files, require_versioned=require_versioned)
 
246
        if want_unversioned:
 
247
            for e in self.target.extras():
 
248
                ret.unversioned.append((e, None, osutils.file_kind(self.target.abspath(e))))
 
249
        return ret
 
250
 
 
251
    def iter_changes(self, include_unchanged=False, specific_files=None,
 
252
        pb=None, extra_trees=[], require_versioned=True, want_unversioned=False):
 
253
        changes = self._index.changes_from_tree(
 
254
            self.source._repository._git.object_store, self.source.tree, 
 
255
            want_unchanged=include_unchanged)
 
256
        # FIXME: Handle want_unversioned
 
257
        return changes_from_git_changes(changes, self.target.mapping, 
 
258
            specific_file=specific_files)
 
259
 
 
260
tree.InterTree.register_optimiser(InterIndexGitTree)