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  • Committer: Marius Kruger
  • Date: 2010-07-10 21:28:56 UTC
  • mto: (5384.1.1 integration)
  • mto: This revision was merged to the branch mainline in revision 5385.
  • Revision ID: marius.kruger@enerweb.co.za-20100710212856-uq4ji3go0u5se7hx
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bzrlib/memorytree.py
19
19
See MemoryTree for more details.
20
20
"""
21
21
 
 
22
 
22
23
import os
23
 
import stat
24
24
 
25
 
from . import (
 
25
from bzrlib import (
26
26
    errors,
27
 
    lock,
 
27
    mutabletree,
28
28
    revision as _mod_revision,
29
29
    )
30
 
from .bzr.inventory import Inventory
31
 
from .bzr.inventorytree import MutableInventoryTree
32
 
from .osutils import sha_file
33
 
from .transport.memory import MemoryTransport
34
 
 
35
 
 
36
 
class MemoryTree(MutableInventoryTree):
 
30
from bzrlib.decorators import needs_read_lock
 
31
from bzrlib.osutils import sha_file
 
32
from bzrlib.mutabletree import needs_tree_write_lock
 
33
from bzrlib.transport.memory import MemoryTransport
 
34
 
 
35
 
 
36
class MemoryTree(mutabletree.MutableTree):
37
37
    """A MemoryTree is a specialisation of MutableTree.
38
38
 
39
39
    It maintains nearly no state outside of read_lock and write_lock
44
44
    def __init__(self, branch, revision_id):
45
45
        """Construct a MemoryTree for branch using revision_id."""
46
46
        self.branch = branch
47
 
        self.controldir = branch.controldir
 
47
        self.bzrdir = branch.bzrdir
48
48
        self._branch_revision_id = revision_id
49
49
        self._locks = 0
50
50
        self._lock_mode = None
51
51
 
52
 
    def supports_symlinks(self):
53
 
        return True
54
 
 
55
 
    def supports_tree_reference(self):
56
 
        return False
57
 
 
58
 
    def get_config_stack(self):
59
 
        return self.branch.get_config_stack()
60
 
 
61
 
    def is_control_filename(self, filename):
62
 
        # Memory tree doesn't have any control filenames
63
 
        return False
64
 
 
 
52
    @needs_tree_write_lock
65
53
    def _add(self, files, ids, kinds):
66
54
        """See MutableTree._add."""
67
 
        with self.lock_tree_write():
68
 
            for f, file_id, kind in zip(files, ids, kinds):
69
 
                if kind is None:
70
 
                    st_mode = self._file_transport.stat(f).st_mode
71
 
                    if stat.S_ISREG(st_mode):
72
 
                        kind = 'file'
73
 
                    elif stat.S_ISLNK(st_mode):
74
 
                        kind = 'symlink'
75
 
                    elif stat.S_ISDIR(st_mode):
76
 
                        kind = 'directory'
77
 
                    else:
78
 
                        raise AssertionError('Unknown file kind')
79
 
                if file_id is None:
80
 
                    self._inventory.add_path(f, kind=kind)
81
 
                else:
82
 
                    self._inventory.add_path(f, kind=kind, file_id=file_id)
 
55
        for f, file_id, kind in zip(files, ids, kinds):
 
56
            if kind is None:
 
57
                kind = 'file'
 
58
            if file_id is None:
 
59
                self._inventory.add_path(f, kind=kind)
 
60
            else:
 
61
                self._inventory.add_path(f, kind=kind, file_id=file_id)
83
62
 
84
63
    def basis_tree(self):
85
64
        """See Tree.basis_tree()."""
98
77
        missing files, so is a no-op.
99
78
        """
100
79
 
101
 
    def get_file(self, path):
 
80
    def get_file(self, file_id, path=None):
102
81
        """See Tree.get_file."""
 
82
        if path is None:
 
83
            path = self.id2path(file_id)
103
84
        return self._file_transport.get(path)
104
85
 
105
 
    def get_file_sha1(self, path, stat_value=None):
 
86
    def get_file_sha1(self, file_id, path=None, stat_value=None):
106
87
        """See Tree.get_file_sha1()."""
 
88
        if path is None:
 
89
            path = self.id2path(file_id)
107
90
        stream = self._file_transport.get(path)
108
91
        return sha_file(stream)
109
92
 
 
93
    def get_root_id(self):
 
94
        return self.path2id('')
 
95
 
110
96
    def _comparison_data(self, entry, path):
111
97
        """See Tree._comparison_data."""
112
98
        if entry is None:
113
99
            return None, False, None
114
100
        return entry.kind, entry.executable, None
115
101
 
 
102
    @needs_tree_write_lock
116
103
    def rename_one(self, from_rel, to_rel):
117
 
        with self.lock_tree_write():
118
 
            file_id = self.path2id(from_rel)
119
 
            to_dir, to_tail = os.path.split(to_rel)
120
 
            to_parent_id = self.path2id(to_dir)
121
 
            self._file_transport.move(from_rel, to_rel)
122
 
            self._inventory.rename(file_id, to_parent_id, to_tail)
 
104
        file_id = self.path2id(from_rel)
 
105
        to_dir, to_tail = os.path.split(to_rel)
 
106
        to_parent_id = self.path2id(to_dir)
 
107
        self._file_transport.move(from_rel, to_rel)
 
108
        self._inventory.rename(file_id, to_parent_id, to_tail)
123
109
 
124
110
    def path_content_summary(self, path):
125
111
        """See Tree.path_content_summary."""
126
112
        id = self.path2id(path)
127
113
        if id is None:
128
114
            return 'missing', None, None, None
129
 
        kind = self.kind(path, id)
 
115
        kind = self.kind(id)
130
116
        if kind == 'file':
131
117
            bytes = self._file_transport.get_bytes(path)
132
118
            size = len(bytes)
133
119
            executable = self._inventory[id].executable
134
 
            sha1 = None  # no stat cache
 
120
            sha1 = None # no stat cache
135
121
            return (kind, size, executable, sha1)
136
122
        elif kind == 'directory':
137
123
            # memory tree does not support nested trees yet.
138
124
            return kind, None, None, None
139
125
        elif kind == 'symlink':
140
 
            return kind, None, None, self._inventory[id].symlink_target
 
126
            raise NotImplementedError('symlink support')
141
127
        else:
142
128
            raise NotImplementedError('unknown kind')
143
129
 
 
130
    def _file_size(self, entry, stat_value):
 
131
        """See Tree._file_size."""
 
132
        if entry is None:
 
133
            return 0
 
134
        return entry.text_size
 
135
 
 
136
    @needs_read_lock
144
137
    def get_parent_ids(self):
145
138
        """See Tree.get_parent_ids.
146
139
 
147
140
        This implementation returns the current cached value from
148
141
            self._parent_ids.
149
142
        """
150
 
        with self.lock_read():
151
 
            return list(self._parent_ids)
 
143
        return list(self._parent_ids)
152
144
 
153
145
    def has_filename(self, filename):
154
146
        """See Tree.has_filename()."""
155
147
        return self._file_transport.has(filename)
156
148
 
157
 
    def is_executable(self, path):
158
 
        return self._inventory.get_entry_by_path(path).executable
 
149
    def is_executable(self, file_id, path=None):
 
150
        return self._inventory[file_id].executable
159
151
 
160
 
    def kind(self, path):
161
 
        return self._inventory.get_entry_by_path(path).kind
 
152
    def kind(self, file_id):
 
153
        return self._inventory[file_id].kind
162
154
 
163
155
    def mkdir(self, path, file_id=None):
164
156
        """See MutableTree.mkdir()."""
168
160
        self._file_transport.mkdir(path)
169
161
        return file_id
170
162
 
 
163
    @needs_read_lock
171
164
    def last_revision(self):
172
165
        """See MutableTree.last_revision."""
173
 
        with self.lock_read():
174
 
            return self._branch_revision_id
 
166
        return self._branch_revision_id
175
167
 
176
168
    def lock_read(self):
177
169
        """Lock the memory tree for reading.
184
176
                self.branch.lock_read()
185
177
                self._lock_mode = "r"
186
178
                self._populate_from_branch()
187
 
            return lock.LogicalLockResult(self.unlock)
188
 
        except BaseException:
 
179
        except:
189
180
            self._locks -= 1
190
181
            raise
191
182
 
199
190
                self._populate_from_branch()
200
191
            elif self._lock_mode == "r":
201
192
                raise errors.ReadOnlyError(self)
202
 
        except BaseException:
 
193
        except:
203
194
            self._locks -= 1
204
195
            raise
205
 
        return lock.LogicalLockResult(self.unlock)
206
196
 
207
197
    def lock_write(self):
208
198
        """See MutableTree.lock_write()."""
214
204
                self._populate_from_branch()
215
205
            elif self._lock_mode == "r":
216
206
                raise errors.ReadOnlyError(self)
217
 
            return lock.LogicalLockResult(self.unlock)
218
 
        except BaseException:
 
207
        except:
219
208
            self._locks -= 1
220
209
            raise
221
210
 
226
215
            self._parent_ids = []
227
216
        else:
228
217
            self._parent_ids = [self._branch_revision_id]
229
 
        self._inventory = Inventory(None, self._basis_tree.get_revision_id())
 
218
        self._inventory = self._basis_tree._inventory._get_mutable_inventory()
230
219
        self._file_transport = MemoryTransport()
231
220
        # TODO copy the revision trees content, or do it lazy, or something.
232
 
        inventory_entries = self._basis_tree.iter_entries_by_dir()
 
221
        inventory_entries = self._inventory.iter_entries()
233
222
        for path, entry in inventory_entries:
234
 
            self._inventory.add(entry.copy())
235
223
            if path == '':
236
224
                continue
237
225
            if entry.kind == 'directory':
238
226
                self._file_transport.mkdir(path)
239
 
            elif entry.kind == 'symlink':
240
 
                self._file_transport.symlink(entry.symlink_target, path)
241
227
            elif entry.kind == 'file':
242
 
                self._file_transport.put_file(
243
 
                    path, self._basis_tree.get_file(path))
 
228
                self._file_transport.put_file(path,
 
229
                    self._basis_tree.get_file(entry.file_id))
244
230
            else:
245
231
                raise NotImplementedError(self._populate_from_branch)
246
232
 
247
 
    def put_file_bytes_non_atomic(self, path, bytes):
 
233
    def put_file_bytes_non_atomic(self, file_id, bytes):
248
234
        """See MutableTree.put_file_bytes_non_atomic."""
249
 
        self._file_transport.put_bytes(path, bytes)
 
235
        self._file_transport.put_bytes(self.id2path(file_id), bytes)
250
236
 
251
237
    def unlock(self):
252
238
        """Release a lock.
266
252
        else:
267
253
            self._locks -= 1
268
254
 
269
 
    def unversion(self, paths):
270
 
        """Remove the paths from the current versioned set.
 
255
    @needs_tree_write_lock
 
256
    def unversion(self, file_ids):
 
257
        """Remove the file ids in file_ids from the current versioned set.
271
258
 
272
259
        When a file_id is unversioned, all of its children are automatically
273
260
        unversioned.
274
261
 
275
 
        :param paths: The paths to stop versioning.
 
262
        :param file_ids: The file ids to stop versioning.
276
263
        :raises: NoSuchId if any fileid is not currently versioned.
277
264
        """
278
 
        with self.lock_tree_write():
279
 
            # XXX: This should be in mutabletree, but the inventory-save action
280
 
            # is not relevant to memory tree. Until that is done in unlock by
281
 
            # working tree, we cannot share the implementation.
282
 
            file_ids = set()
283
 
            for path in paths:
284
 
                file_id = self.path2id(path)
285
 
                if file_id is None:
286
 
                    raise errors.NoSuchFile(path)
287
 
                file_ids.add(file_id)
288
 
            for file_id in file_ids:
289
 
                if self._inventory.has_id(file_id):
290
 
                    self._inventory.remove_recursive_id(file_id)
 
265
        # XXX: This should be in mutabletree, but the inventory-save action
 
266
        # is not relevant to memory tree. Until that is done in unlock by
 
267
        # working tree, we cannot share the implementation.
 
268
        for file_id in file_ids:
 
269
            if self._inventory.has_id(file_id):
 
270
                self._inventory.remove_recursive_id(file_id)
 
271
            else:
 
272
                raise errors.NoSuchId(self, file_id)
291
273
 
292
274
    def set_parent_ids(self, revision_ids, allow_leftmost_as_ghost=False):
293
275
        """See MutableTree.set_parent_trees()."""
301
283
            self._branch_revision_id = revision_ids[0]
302
284
        self._allow_leftmost_as_ghost = allow_leftmost_as_ghost
303
285
        self._set_basis()
304
 
 
 
286
    
305
287
    def _set_basis(self):
306
288
        try:
307
289
            self._basis_tree = self.branch.repository.revision_tree(
313
295
            else:
314
296
                raise
315
297
 
316
 
    def get_symlink_target(self, path):
317
 
        with self.lock_read():
318
 
            return self._file_transport.readlink(path)
319
 
 
320
298
    def set_parent_trees(self, parents_list, allow_leftmost_as_ghost=False):
321
299
        """See MutableTree.set_parent_trees()."""
322
300
        if len(parents_list) == 0:
323
301
            self._parent_ids = []
324
302
            self._basis_tree = self.branch.repository.revision_tree(
325
 
                _mod_revision.NULL_REVISION)
 
303
                                   _mod_revision.NULL_REVISION)
326
304
        else:
327
305
            if parents_list[0][1] is None and not allow_leftmost_as_ghost:
328
306
                # a ghost in the left most parent
329
307
                raise errors.GhostRevisionUnusableHere(parents_list[0][0])
330
308
            self._parent_ids = [parent_id for parent_id, tree in parents_list]
331
 
            if parents_list[0][1] is None or parents_list[0][1] == b'null:':
 
309
            if parents_list[0][1] is None or parents_list[0][1] == 'null:':
332
310
                self._basis_tree = self.branch.repository.revision_tree(
333
 
                    _mod_revision.NULL_REVISION)
 
311
                                       _mod_revision.NULL_REVISION)
334
312
            else:
335
313
                self._basis_tree = parents_list[0][1]
336
314
            self._branch_revision_id = parents_list[0][0]