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  • Committer: Robert Collins
  • Date: 2010-05-06 11:08:10 UTC
  • mto: This revision was merged to the branch mainline in revision 5223.
  • Revision ID: robertc@robertcollins.net-20100506110810-h3j07fh5gmw54s25
Cleaner matcher matching revised unlocking protocol.

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bzrlib/memorytree.py
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See MemoryTree for more details.
20
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"""
21
21
 
22
 
from __future__ import absolute_import
23
22
 
24
23
import os
25
24
 
26
 
from . import (
 
25
from bzrlib import (
27
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    errors,
28
 
    lock,
 
27
    mutabletree,
29
28
    revision as _mod_revision,
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    )
31
 
from .bzr.inventory import Inventory
32
 
from .bzr.inventorytree import MutableInventoryTree
33
 
from .osutils import sha_file
34
 
from .transport.memory import MemoryTransport
35
 
 
36
 
 
37
 
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):
38
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    """A MemoryTree is a specialisation of MutableTree.
39
38
 
40
39
    It maintains nearly no state outside of read_lock and write_lock
45
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    def __init__(self, branch, revision_id):
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        """Construct a MemoryTree for branch using revision_id."""
47
46
        self.branch = branch
48
 
        self.controldir = branch.controldir
 
47
        self.bzrdir = branch.bzrdir
49
48
        self._branch_revision_id = revision_id
50
49
        self._locks = 0
51
50
        self._lock_mode = None
52
51
 
53
 
    def get_config_stack(self):
54
 
        return self.branch.get_config_stack()
55
 
 
56
 
    def is_control_filename(self, filename):
57
 
        # Memory tree doesn't have any control filenames
58
 
        return False
59
 
 
 
52
    @needs_tree_write_lock
60
53
    def _add(self, files, ids, kinds):
61
54
        """See MutableTree._add."""
62
 
        with self.lock_tree_write():
63
 
            for f, file_id, kind in zip(files, ids, kinds):
64
 
                if kind is None:
65
 
                    kind = 'file'
66
 
                if file_id is None:
67
 
                    self._inventory.add_path(f, kind=kind)
68
 
                else:
69
 
                    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)
70
62
 
71
63
    def basis_tree(self):
72
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        """See Tree.basis_tree()."""
85
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        missing files, so is a no-op.
86
78
        """
87
79
 
88
 
    def get_file(self, path):
 
80
    def get_file(self, file_id, path=None):
89
81
        """See Tree.get_file."""
 
82
        if path is None:
 
83
            path = self.id2path(file_id)
90
84
        return self._file_transport.get(path)
91
85
 
92
 
    def get_file_sha1(self, path, stat_value=None):
 
86
    def get_file_sha1(self, file_id, path=None, stat_value=None):
93
87
        """See Tree.get_file_sha1()."""
 
88
        if path is None:
 
89
            path = self.id2path(file_id)
94
90
        stream = self._file_transport.get(path)
95
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        return sha_file(stream)
96
92
 
103
99
            return None, False, None
104
100
        return entry.kind, entry.executable, None
105
101
 
 
102
    @needs_tree_write_lock
106
103
    def rename_one(self, from_rel, to_rel):
107
 
        with self.lock_tree_write():
108
 
            file_id = self.path2id(from_rel)
109
 
            to_dir, to_tail = os.path.split(to_rel)
110
 
            to_parent_id = self.path2id(to_dir)
111
 
            self._file_transport.move(from_rel, to_rel)
112
 
            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)
113
109
 
114
110
    def path_content_summary(self, path):
115
111
        """See Tree.path_content_summary."""
116
112
        id = self.path2id(path)
117
113
        if id is None:
118
114
            return 'missing', None, None, None
119
 
        kind = self.kind(path, id)
 
115
        kind = self.kind(id)
120
116
        if kind == 'file':
121
117
            bytes = self._file_transport.get_bytes(path)
122
118
            size = len(bytes)
123
119
            executable = self._inventory[id].executable
124
 
            sha1 = None  # no stat cache
 
120
            sha1 = None # no stat cache
125
121
            return (kind, size, executable, sha1)
126
122
        elif kind == 'directory':
127
123
            # memory tree does not support nested trees yet.
131
127
        else:
132
128
            raise NotImplementedError('unknown kind')
133
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
134
137
    def get_parent_ids(self):
135
138
        """See Tree.get_parent_ids.
136
139
 
137
140
        This implementation returns the current cached value from
138
141
            self._parent_ids.
139
142
        """
140
 
        with self.lock_read():
141
 
            return list(self._parent_ids)
 
143
        return list(self._parent_ids)
142
144
 
143
145
    def has_filename(self, filename):
144
146
        """See Tree.has_filename()."""
145
147
        return self._file_transport.has(filename)
146
148
 
147
 
    def is_executable(self, path):
148
 
        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
149
151
 
150
 
    def kind(self, path):
151
 
        file_id = self.path2id(path)
 
152
    def kind(self, file_id):
152
153
        return self._inventory[file_id].kind
153
154
 
154
155
    def mkdir(self, path, file_id=None):
159
160
        self._file_transport.mkdir(path)
160
161
        return file_id
161
162
 
 
163
    @needs_read_lock
162
164
    def last_revision(self):
163
165
        """See MutableTree.last_revision."""
164
 
        with self.lock_read():
165
 
            return self._branch_revision_id
 
166
        return self._branch_revision_id
166
167
 
167
168
    def lock_read(self):
168
169
        """Lock the memory tree for reading.
175
176
                self.branch.lock_read()
176
177
                self._lock_mode = "r"
177
178
                self._populate_from_branch()
178
 
            return lock.LogicalLockResult(self.unlock)
179
 
        except BaseException:
 
179
        except:
180
180
            self._locks -= 1
181
181
            raise
182
182
 
190
190
                self._populate_from_branch()
191
191
            elif self._lock_mode == "r":
192
192
                raise errors.ReadOnlyError(self)
193
 
        except BaseException:
 
193
        except:
194
194
            self._locks -= 1
195
195
            raise
196
 
        return lock.LogicalLockResult(self.unlock)
197
196
 
198
197
    def lock_write(self):
199
198
        """See MutableTree.lock_write()."""
205
204
                self._populate_from_branch()
206
205
            elif self._lock_mode == "r":
207
206
                raise errors.ReadOnlyError(self)
208
 
            return lock.LogicalLockResult(self.unlock)
209
 
        except BaseException:
 
207
        except:
210
208
            self._locks -= 1
211
209
            raise
212
210
 
217
215
            self._parent_ids = []
218
216
        else:
219
217
            self._parent_ids = [self._branch_revision_id]
220
 
        self._inventory = Inventory(None, self._basis_tree.get_revision_id())
 
218
        self._inventory = self._basis_tree._inventory._get_mutable_inventory()
221
219
        self._file_transport = MemoryTransport()
222
220
        # TODO copy the revision trees content, or do it lazy, or something.
223
 
        inventory_entries = self._basis_tree.iter_entries_by_dir()
 
221
        inventory_entries = self._inventory.iter_entries()
224
222
        for path, entry in inventory_entries:
225
 
            self._inventory.add(entry.copy())
226
223
            if path == '':
227
224
                continue
228
225
            if entry.kind == 'directory':
229
226
                self._file_transport.mkdir(path)
230
227
            elif entry.kind == 'file':
231
 
                self._file_transport.put_file(
232
 
                    path, self._basis_tree.get_file(path))
 
228
                self._file_transport.put_file(path,
 
229
                    self._basis_tree.get_file(entry.file_id))
233
230
            else:
234
231
                raise NotImplementedError(self._populate_from_branch)
235
232
 
236
 
    def put_file_bytes_non_atomic(self, path, bytes):
 
233
    def put_file_bytes_non_atomic(self, file_id, bytes):
237
234
        """See MutableTree.put_file_bytes_non_atomic."""
238
 
        self._file_transport.put_bytes(path, bytes)
 
235
        self._file_transport.put_bytes(self.id2path(file_id), bytes)
239
236
 
240
237
    def unlock(self):
241
238
        """Release a lock.
255
252
        else:
256
253
            self._locks -= 1
257
254
 
258
 
    def unversion(self, paths):
259
 
        """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.
260
258
 
261
259
        When a file_id is unversioned, all of its children are automatically
262
260
        unversioned.
263
261
 
264
 
        :param paths: The paths to stop versioning.
 
262
        :param file_ids: The file ids to stop versioning.
265
263
        :raises: NoSuchId if any fileid is not currently versioned.
266
264
        """
267
 
        with self.lock_tree_write():
268
 
            # XXX: This should be in mutabletree, but the inventory-save action
269
 
            # is not relevant to memory tree. Until that is done in unlock by
270
 
            # working tree, we cannot share the implementation.
271
 
            file_ids = set()
272
 
            for path in paths:
273
 
                file_id = self.path2id(path)
274
 
                if file_id is None:
275
 
                    raise errors.NoSuchFile(path)
276
 
                file_ids.add(file_id)
277
 
            for file_id in file_ids:
278
 
                if self._inventory.has_id(file_id):
279
 
                    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)
280
273
 
281
274
    def set_parent_ids(self, revision_ids, allow_leftmost_as_ghost=False):
282
275
        """See MutableTree.set_parent_trees()."""
290
283
            self._branch_revision_id = revision_ids[0]
291
284
        self._allow_leftmost_as_ghost = allow_leftmost_as_ghost
292
285
        self._set_basis()
293
 
 
 
286
    
294
287
    def _set_basis(self):
295
288
        try:
296
289
            self._basis_tree = self.branch.repository.revision_tree(
307
300
        if len(parents_list) == 0:
308
301
            self._parent_ids = []
309
302
            self._basis_tree = self.branch.repository.revision_tree(
310
 
                _mod_revision.NULL_REVISION)
 
303
                                   _mod_revision.NULL_REVISION)
311
304
        else:
312
305
            if parents_list[0][1] is None and not allow_leftmost_as_ghost:
313
306
                # a ghost in the left most parent
314
307
                raise errors.GhostRevisionUnusableHere(parents_list[0][0])
315
308
            self._parent_ids = [parent_id for parent_id, tree in parents_list]
316
 
            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:':
317
310
                self._basis_tree = self.branch.repository.revision_tree(
318
 
                    _mod_revision.NULL_REVISION)
 
311
                                       _mod_revision.NULL_REVISION)
319
312
            else:
320
313
                self._basis_tree = parents_list[0][1]
321
314
            self._branch_revision_id = parents_list[0][0]