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  • Committer: John Ferlito
  • Date: 2009-09-02 04:31:45 UTC
  • mto: (4665.7.1 serve-init)
  • mto: This revision was merged to the branch mainline in revision 4913.
  • Revision ID: johnf@inodes.org-20090902043145-gxdsfw03ilcwbyn5
Add a debian init script for bzr --serve

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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
    osutils,
28
29
    revision as _mod_revision,
29
30
    )
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):
 
31
from bzrlib.decorators import needs_read_lock, needs_write_lock
 
32
from bzrlib.osutils import sha_file
 
33
from bzrlib.mutabletree import needs_tree_write_lock
 
34
from bzrlib.transport.memory import MemoryTransport
 
35
 
 
36
 
 
37
class MemoryTree(mutabletree.MutableTree):
37
38
    """A MemoryTree is a specialisation of MutableTree.
38
39
 
39
40
    It maintains nearly no state outside of read_lock and write_lock
44
45
    def __init__(self, branch, revision_id):
45
46
        """Construct a MemoryTree for branch using revision_id."""
46
47
        self.branch = branch
47
 
        self.controldir = branch.controldir
 
48
        self.bzrdir = branch.bzrdir
48
49
        self._branch_revision_id = revision_id
49
50
        self._locks = 0
50
51
        self._lock_mode = None
51
52
 
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
 
 
 
53
    @needs_tree_write_lock
65
54
    def _add(self, files, ids, kinds):
66
55
        """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)
 
56
        for f, file_id, kind in zip(files, ids, kinds):
 
57
            if kind is None:
 
58
                kind = 'file'
 
59
            if file_id is None:
 
60
                self._inventory.add_path(f, kind=kind)
 
61
            else:
 
62
                self._inventory.add_path(f, kind=kind, file_id=file_id)
83
63
 
84
64
    def basis_tree(self):
85
65
        """See Tree.basis_tree()."""
98
78
        missing files, so is a no-op.
99
79
        """
100
80
 
101
 
    def get_file(self, path):
 
81
    def get_file(self, file_id, path=None):
102
82
        """See Tree.get_file."""
 
83
        if path is None:
 
84
            path = self.id2path(file_id)
103
85
        return self._file_transport.get(path)
104
86
 
105
 
    def get_file_sha1(self, path, stat_value=None):
 
87
    def get_file_sha1(self, file_id, path=None, stat_value=None):
106
88
        """See Tree.get_file_sha1()."""
 
89
        if path is None:
 
90
            path = self.id2path(file_id)
107
91
        stream = self._file_transport.get(path)
108
92
        return sha_file(stream)
109
93
 
 
94
    def get_root_id(self):
 
95
        return self.path2id('')
 
96
 
110
97
    def _comparison_data(self, entry, path):
111
98
        """See Tree._comparison_data."""
112
99
        if entry is None:
113
100
            return None, False, None
114
101
        return entry.kind, entry.executable, None
115
102
 
 
103
    @needs_tree_write_lock
116
104
    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)
 
105
        file_id = self.path2id(from_rel)
 
106
        to_dir, to_tail = os.path.split(to_rel)
 
107
        to_parent_id = self.path2id(to_dir)
 
108
        self._file_transport.move(from_rel, to_rel)
 
109
        self._inventory.rename(file_id, to_parent_id, to_tail)
123
110
 
124
111
    def path_content_summary(self, path):
125
112
        """See Tree.path_content_summary."""
126
113
        id = self.path2id(path)
127
114
        if id is None:
128
115
            return 'missing', None, None, None
129
 
        kind = self.kind(path, id)
 
116
        kind = self.kind(id)
130
117
        if kind == 'file':
131
118
            bytes = self._file_transport.get_bytes(path)
132
119
            size = len(bytes)
133
120
            executable = self._inventory[id].executable
134
 
            sha1 = None  # no stat cache
 
121
            sha1 = None # no stat cache
135
122
            return (kind, size, executable, sha1)
136
123
        elif kind == 'directory':
137
124
            # memory tree does not support nested trees yet.
138
125
            return kind, None, None, None
139
126
        elif kind == 'symlink':
140
 
            return kind, None, None, self._inventory[id].symlink_target
 
127
            raise NotImplementedError('symlink support')
141
128
        else:
142
129
            raise NotImplementedError('unknown kind')
143
130
 
 
131
    def _file_size(self, entry, stat_value):
 
132
        """See Tree._file_size."""
 
133
        if entry is None:
 
134
            return 0
 
135
        return entry.text_size
 
136
 
 
137
    @needs_read_lock
144
138
    def get_parent_ids(self):
145
139
        """See Tree.get_parent_ids.
146
140
 
147
141
        This implementation returns the current cached value from
148
142
            self._parent_ids.
149
143
        """
150
 
        with self.lock_read():
151
 
            return list(self._parent_ids)
 
144
        return list(self._parent_ids)
152
145
 
153
146
    def has_filename(self, filename):
154
147
        """See Tree.has_filename()."""
155
148
        return self._file_transport.has(filename)
156
149
 
157
 
    def is_executable(self, path):
158
 
        return self._inventory.get_entry_by_path(path).executable
 
150
    def is_executable(self, file_id, path=None):
 
151
        return self._inventory[file_id].executable
159
152
 
160
 
    def kind(self, path):
161
 
        return self._inventory.get_entry_by_path(path).kind
 
153
    def kind(self, file_id):
 
154
        return self._inventory[file_id].kind
162
155
 
163
156
    def mkdir(self, path, file_id=None):
164
157
        """See MutableTree.mkdir()."""
168
161
        self._file_transport.mkdir(path)
169
162
        return file_id
170
163
 
 
164
    @needs_read_lock
171
165
    def last_revision(self):
172
166
        """See MutableTree.last_revision."""
173
 
        with self.lock_read():
174
 
            return self._branch_revision_id
 
167
        return self._branch_revision_id
175
168
 
176
169
    def lock_read(self):
177
170
        """Lock the memory tree for reading.
184
177
                self.branch.lock_read()
185
178
                self._lock_mode = "r"
186
179
                self._populate_from_branch()
187
 
            return lock.LogicalLockResult(self.unlock)
188
 
        except BaseException:
 
180
        except:
189
181
            self._locks -= 1
190
182
            raise
191
183
 
199
191
                self._populate_from_branch()
200
192
            elif self._lock_mode == "r":
201
193
                raise errors.ReadOnlyError(self)
202
 
        except BaseException:
 
194
        except:
203
195
            self._locks -= 1
204
196
            raise
205
 
        return lock.LogicalLockResult(self.unlock)
206
197
 
207
198
    def lock_write(self):
208
199
        """See MutableTree.lock_write()."""
214
205
                self._populate_from_branch()
215
206
            elif self._lock_mode == "r":
216
207
                raise errors.ReadOnlyError(self)
217
 
            return lock.LogicalLockResult(self.unlock)
218
 
        except BaseException:
 
208
        except:
219
209
            self._locks -= 1
220
210
            raise
221
211
 
226
216
            self._parent_ids = []
227
217
        else:
228
218
            self._parent_ids = [self._branch_revision_id]
229
 
        self._inventory = Inventory(None, self._basis_tree.get_revision_id())
 
219
        self._inventory = self._basis_tree._inventory._get_mutable_inventory()
230
220
        self._file_transport = MemoryTransport()
231
221
        # TODO copy the revision trees content, or do it lazy, or something.
232
 
        inventory_entries = self._basis_tree.iter_entries_by_dir()
 
222
        inventory_entries = self._inventory.iter_entries()
233
223
        for path, entry in inventory_entries:
234
 
            self._inventory.add(entry.copy())
235
224
            if path == '':
236
225
                continue
237
226
            if entry.kind == 'directory':
238
227
                self._file_transport.mkdir(path)
239
 
            elif entry.kind == 'symlink':
240
 
                self._file_transport.symlink(entry.symlink_target, path)
241
228
            elif entry.kind == 'file':
242
 
                self._file_transport.put_file(
243
 
                    path, self._basis_tree.get_file(path))
 
229
                self._file_transport.put_file(path,
 
230
                    self._basis_tree.get_file(entry.file_id))
244
231
            else:
245
232
                raise NotImplementedError(self._populate_from_branch)
246
233
 
247
 
    def put_file_bytes_non_atomic(self, path, bytes):
 
234
    def put_file_bytes_non_atomic(self, file_id, bytes):
248
235
        """See MutableTree.put_file_bytes_non_atomic."""
249
 
        self._file_transport.put_bytes(path, bytes)
 
236
        self._file_transport.put_bytes(self.id2path(file_id), bytes)
250
237
 
251
238
    def unlock(self):
252
239
        """Release a lock.
266
253
        else:
267
254
            self._locks -= 1
268
255
 
269
 
    def unversion(self, paths):
270
 
        """Remove the paths from the current versioned set.
 
256
    @needs_tree_write_lock
 
257
    def unversion(self, file_ids):
 
258
        """Remove the file ids in file_ids from the current versioned set.
271
259
 
272
260
        When a file_id is unversioned, all of its children are automatically
273
261
        unversioned.
274
262
 
275
 
        :param paths: The paths to stop versioning.
 
263
        :param file_ids: The file ids to stop versioning.
276
264
        :raises: NoSuchId if any fileid is not currently versioned.
277
265
        """
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)
 
266
        # XXX: This should be in mutabletree, but the inventory-save action
 
267
        # is not relevant to memory tree. Until that is done in unlock by
 
268
        # working tree, we cannot share the implementation.
 
269
        for file_id in file_ids:
 
270
            if self._inventory.has_id(file_id):
 
271
                self._inventory.remove_recursive_id(file_id)
 
272
            else:
 
273
                raise errors.NoSuchId(self, file_id)
291
274
 
292
275
    def set_parent_ids(self, revision_ids, allow_leftmost_as_ghost=False):
293
276
        """See MutableTree.set_parent_trees()."""
301
284
            self._branch_revision_id = revision_ids[0]
302
285
        self._allow_leftmost_as_ghost = allow_leftmost_as_ghost
303
286
        self._set_basis()
304
 
 
 
287
    
305
288
    def _set_basis(self):
306
289
        try:
307
290
            self._basis_tree = self.branch.repository.revision_tree(
313
296
            else:
314
297
                raise
315
298
 
316
 
    def get_symlink_target(self, path):
317
 
        with self.lock_read():
318
 
            return self._file_transport.readlink(path)
319
 
 
320
299
    def set_parent_trees(self, parents_list, allow_leftmost_as_ghost=False):
321
300
        """See MutableTree.set_parent_trees()."""
322
301
        if len(parents_list) == 0:
323
302
            self._parent_ids = []
324
303
            self._basis_tree = self.branch.repository.revision_tree(
325
 
                _mod_revision.NULL_REVISION)
 
304
                                   _mod_revision.NULL_REVISION)
326
305
        else:
327
306
            if parents_list[0][1] is None and not allow_leftmost_as_ghost:
328
307
                # a ghost in the left most parent
329
308
                raise errors.GhostRevisionUnusableHere(parents_list[0][0])
330
309
            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:':
 
310
            if parents_list[0][1] is None or parents_list[0][1] == 'null:':
332
311
                self._basis_tree = self.branch.repository.revision_tree(
333
 
                    _mod_revision.NULL_REVISION)
 
312
                                       _mod_revision.NULL_REVISION)
334
313
            else:
335
314
                self._basis_tree = parents_list[0][1]
336
315
            self._branch_revision_id = parents_list[0][0]