1
# (C) 2005 Canonical Ltd
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.
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.
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
18
# TODO: Maybe also keep the full path of the entry, and the children?
19
# But those depend on its position within a particular inventory, and
20
# it would be nice not to need to hold the backpointer here.
22
# TODO: Perhaps split InventoryEntry into subclasses for files,
23
# directories, etc etc.
26
# This should really be an id randomly assigned when the tree is
27
# created, but it's not for now.
31
import sys, os.path, types, re
34
from bzrlib.errors import BzrError, BzrCheckError
36
from bzrlib.osutils import uuid, quotefn, splitpath, joinpath, appendpath
37
from bzrlib.trace import mutter
38
from bzrlib.errors import NotVersionedError
41
class InventoryEntry(object):
42
"""Description of a versioned file.
44
An InventoryEntry has the following fields, which are also
45
present in the XML inventory-entry element:
50
(within the parent directory)
56
file_id of the parent directory, or ROOT_ID
59
the revision_id in which the name or parent of this file was
63
sha-1 of the text of the file
66
size in bytes of the text of the file
69
the revision_id in which the text of this file was introduced
71
(reading a version 4 tree created a text_id field.)
76
>>> i.add(InventoryEntry('123', 'src', 'directory', ROOT_ID))
77
InventoryEntry('123', 'src', kind='directory', parent_id='TREE_ROOT')
78
>>> i.add(InventoryEntry('2323', 'hello.c', 'file', parent_id='123'))
79
InventoryEntry('2323', 'hello.c', kind='file', parent_id='123')
80
>>> for j in i.iter_entries():
83
('src', InventoryEntry('123', 'src', kind='directory', parent_id='TREE_ROOT'))
84
('src/hello.c', InventoryEntry('2323', 'hello.c', kind='file', parent_id='123'))
85
>>> i.add(InventoryEntry('2323', 'bye.c', 'file', '123'))
86
Traceback (most recent call last):
88
BzrError: inventory already contains entry with id {2323}
89
>>> i.add(InventoryEntry('2324', 'bye.c', 'file', '123'))
90
InventoryEntry('2324', 'bye.c', kind='file', parent_id='123')
91
>>> i.add(InventoryEntry('2325', 'wibble', 'directory', '123'))
92
InventoryEntry('2325', 'wibble', kind='directory', parent_id='123')
93
>>> i.path2id('src/wibble')
97
>>> i.add(InventoryEntry('2326', 'wibble.c', 'file', '2325'))
98
InventoryEntry('2326', 'wibble.c', kind='file', parent_id='2325')
100
InventoryEntry('2326', 'wibble.c', kind='file', parent_id='2325')
101
>>> for j in i.iter_entries():
103
... assert i.path2id(j[0])
110
>>> i.id2path('2326')
111
'src/wibble/wibble.c'
114
__slots__ = ['text_sha1', 'text_size', 'file_id', 'name', 'kind',
115
'text_id', 'parent_id', 'children',
116
'text_version', 'entry_version', ]
119
def __init__(self, file_id, name, kind, parent_id, text_id=None):
120
"""Create an InventoryEntry
122
The filename must be a single component, relative to the
123
parent directory; it cannot be a whole path or relative name.
125
>>> e = InventoryEntry('123', 'hello.c', 'file', ROOT_ID)
130
>>> e = InventoryEntry('123', 'src/hello.c', 'file', ROOT_ID)
131
Traceback (most recent call last):
132
BzrCheckError: InventoryEntry name 'src/hello.c' is invalid
134
assert isinstance(name, basestring), name
135
if '/' in name or '\\' in name:
136
raise BzrCheckError('InventoryEntry name %r is invalid' % name)
138
self.text_version = None
139
self.entry_version = None
140
self.text_sha1 = None
141
self.text_size = None
142
self.file_id = file_id
145
self.text_id = text_id
146
self.parent_id = parent_id
147
if kind == 'directory':
152
raise BzrError("unhandled entry kind %r" % kind)
156
def sorted_children(self):
157
l = self.children.items()
163
other = InventoryEntry(self.file_id, self.name, self.kind,
165
other.text_id = self.text_id
166
other.text_sha1 = self.text_sha1
167
other.text_size = self.text_size
168
other.text_version = self.text_version
169
# note that children are *not* copied; they're pulled across when
175
return ("%s(%r, %r, kind=%r, parent_id=%r)"
176
% (self.__class__.__name__,
183
def __eq__(self, other):
184
if not isinstance(other, InventoryEntry):
185
return NotImplemented
187
return (self.file_id == other.file_id) \
188
and (self.name == other.name) \
189
and (self.text_sha1 == other.text_sha1) \
190
and (self.text_size == other.text_size) \
191
and (self.text_id == other.text_id) \
192
and (self.parent_id == other.parent_id) \
193
and (self.kind == other.kind) \
194
and (self.text_version == other.text_version) \
195
and (self.entry_version == other.entry_version)
198
def __ne__(self, other):
199
return not (self == other)
202
raise ValueError('not hashable')
206
class RootEntry(InventoryEntry):
207
def __init__(self, file_id):
208
self.file_id = file_id
210
self.kind = 'root_directory'
211
self.parent_id = None
214
def __eq__(self, other):
215
if not isinstance(other, RootEntry):
216
return NotImplemented
218
return (self.file_id == other.file_id) \
219
and (self.children == other.children)
223
class Inventory(object):
224
"""Inventory of versioned files in a tree.
226
This describes which file_id is present at each point in the tree,
227
and possibly the SHA-1 or other information about the file.
228
Entries can be looked up either by path or by file_id.
230
The inventory represents a typical unix file tree, with
231
directories containing files and subdirectories. We never store
232
the full path to a file, because renaming a directory implicitly
233
moves all of its contents. This class internally maintains a
234
lookup tree that allows the children under a directory to be
237
InventoryEntry objects must not be modified after they are
238
inserted, other than through the Inventory API.
240
>>> inv = Inventory()
241
>>> inv.add(InventoryEntry('123-123', 'hello.c', 'file', ROOT_ID))
242
InventoryEntry('123-123', 'hello.c', kind='file', parent_id='TREE_ROOT')
243
>>> inv['123-123'].name
246
May be treated as an iterator or set to look up file ids:
248
>>> bool(inv.path2id('hello.c'))
253
May also look up by name:
255
>>> [x[0] for x in inv.iter_entries()]
257
>>> inv = Inventory('TREE_ROOT-12345678-12345678')
258
>>> inv.add(InventoryEntry('123-123', 'hello.c', 'file', ROOT_ID))
259
InventoryEntry('123-123', 'hello.c', kind='file', parent_id='TREE_ROOT-12345678-12345678')
261
def __init__(self, root_id=ROOT_ID):
262
"""Create or read an inventory.
264
If a working directory is specified, the inventory is read
265
from there. If the file is specified, read from that. If not,
266
the inventory is created empty.
268
The inventory is created with a default root directory, with
271
# We are letting Branch(init=True) create a unique inventory
272
# root id. Rather than generating a random one here.
274
# root_id = bzrlib.branch.gen_file_id('TREE_ROOT')
275
self.root = RootEntry(root_id)
276
self._byid = {self.root.file_id: self.root}
280
other = Inventory(self.root.file_id)
281
# copy recursively so we know directories will be added before
282
# their children. There are more efficient ways than this...
283
for path, entry in self.iter_entries():
284
if entry == self.root:
286
other.add(entry.copy())
291
return iter(self._byid)
295
"""Returns number of entries."""
296
return len(self._byid)
299
def iter_entries(self, from_dir=None):
300
"""Return (path, entry) pairs, in order by name."""
304
elif isinstance(from_dir, basestring):
305
from_dir = self._byid[from_dir]
307
kids = from_dir.children.items()
309
for name, ie in kids:
311
if ie.kind == 'directory':
312
for cn, cie in self.iter_entries(from_dir=ie.file_id):
313
yield os.path.join(name, cn), cie
317
"""Return list of (path, ie) for all entries except the root.
319
This may be faster than iter_entries.
322
def descend(dir_ie, dir_path):
323
kids = dir_ie.children.items()
325
for name, ie in kids:
326
child_path = os.path.join(dir_path, name)
327
accum.append((child_path, ie))
328
if ie.kind == 'directory':
329
descend(ie, child_path)
331
descend(self.root, '')
335
def directories(self):
336
"""Return (path, entry) pairs for all directories, including the root.
339
def descend(parent_ie, parent_path):
340
accum.append((parent_path, parent_ie))
342
kids = [(ie.name, ie) for ie in parent_ie.children.itervalues() if ie.kind == 'directory']
345
for name, child_ie in kids:
346
child_path = os.path.join(parent_path, name)
347
descend(child_ie, child_path)
348
descend(self.root, '')
353
def __contains__(self, file_id):
354
"""True if this entry contains a file with given id.
356
>>> inv = Inventory()
357
>>> inv.add(InventoryEntry('123', 'foo.c', 'file', ROOT_ID))
358
InventoryEntry('123', 'foo.c', kind='file', parent_id='TREE_ROOT')
364
return file_id in self._byid
367
def __getitem__(self, file_id):
368
"""Return the entry for given file_id.
370
>>> inv = Inventory()
371
>>> inv.add(InventoryEntry('123123', 'hello.c', 'file', ROOT_ID))
372
InventoryEntry('123123', 'hello.c', kind='file', parent_id='TREE_ROOT')
373
>>> inv['123123'].name
377
return self._byid[file_id]
380
raise BzrError("can't look up file_id None")
382
raise BzrError("file_id {%s} not in inventory" % file_id)
385
def get_file_kind(self, file_id):
386
return self._byid[file_id].kind
388
def get_child(self, parent_id, filename):
389
return self[parent_id].children.get(filename)
392
def add(self, entry):
393
"""Add entry to inventory.
395
To add a file to a branch ready to be committed, use Branch.add,
398
Returns the new entry object.
400
if entry.file_id in self._byid:
401
raise BzrError("inventory already contains entry with id {%s}" % entry.file_id)
403
if entry.parent_id == ROOT_ID or entry.parent_id is None:
404
entry.parent_id = self.root.file_id
407
parent = self._byid[entry.parent_id]
409
raise BzrError("parent_id {%s} not in inventory" % entry.parent_id)
411
if parent.children.has_key(entry.name):
412
raise BzrError("%s is already versioned" %
413
appendpath(self.id2path(parent.file_id), entry.name))
415
self._byid[entry.file_id] = entry
416
parent.children[entry.name] = entry
420
def add_path(self, relpath, kind, file_id=None):
421
"""Add entry from a path.
423
The immediate parent must already be versioned.
425
Returns the new entry object."""
426
from bzrlib.branch import gen_file_id
428
parts = bzrlib.osutils.splitpath(relpath)
430
raise BzrError("cannot re-add root of inventory")
433
file_id = gen_file_id(relpath)
435
parent_path = parts[:-1]
436
parent_id = self.path2id(parent_path)
437
if parent_id == None:
438
raise NotVersionedError(parent_path)
440
ie = InventoryEntry(file_id, parts[-1],
441
kind=kind, parent_id=parent_id)
445
def __delitem__(self, file_id):
446
"""Remove entry by id.
448
>>> inv = Inventory()
449
>>> inv.add(InventoryEntry('123', 'foo.c', 'file', ROOT_ID))
450
InventoryEntry('123', 'foo.c', kind='file', parent_id='TREE_ROOT')
459
assert self[ie.parent_id].children[ie.name] == ie
461
# TODO: Test deleting all children; maybe hoist to a separate
463
if ie.kind == 'directory':
464
for cie in ie.children.values():
465
del self[cie.file_id]
468
del self._byid[file_id]
469
del self[ie.parent_id].children[ie.name]
472
def __eq__(self, other):
473
"""Compare two sets by comparing their contents.
479
>>> i1.add(InventoryEntry('123', 'foo', 'file', ROOT_ID))
480
InventoryEntry('123', 'foo', kind='file', parent_id='TREE_ROOT')
483
>>> i2.add(InventoryEntry('123', 'foo', 'file', ROOT_ID))
484
InventoryEntry('123', 'foo', kind='file', parent_id='TREE_ROOT')
488
if not isinstance(other, Inventory):
489
return NotImplemented
491
if len(self._byid) != len(other._byid):
492
# shortcut: obviously not the same
495
return self._byid == other._byid
498
def __ne__(self, other):
499
return not (self == other)
503
raise ValueError('not hashable')
506
def get_idpath(self, file_id):
507
"""Return a list of file_ids for the path to an entry.
509
The list contains one element for each directory followed by
510
the id of the file itself. So the length of the returned list
511
is equal to the depth of the file in the tree, counting the
512
root directory as depth 1.
515
while file_id != None:
517
ie = self._byid[file_id]
519
raise BzrError("file_id {%s} not found in inventory" % file_id)
520
p.insert(0, ie.file_id)
521
file_id = ie.parent_id
525
def id2path(self, file_id):
526
"""Return as a list the path to file_id."""
528
# get all names, skipping root
529
p = [self._byid[fid].name for fid in self.get_idpath(file_id)[1:]]
530
return os.sep.join(p)
534
def path2id(self, name):
535
"""Walk down through directories to return entry of last component.
537
names may be either a list of path components, or a single
538
string, in which case it is automatically split.
540
This returns the entry of the last component in the path,
541
which may be either a file or a directory.
543
Returns None iff the path is not found.
545
if isinstance(name, types.StringTypes):
546
name = splitpath(name)
548
mutter("lookup path %r" % name)
553
cie = parent.children[f]
555
assert cie.parent_id == parent.file_id
561
return parent.file_id
564
def has_filename(self, names):
565
return bool(self.path2id(names))
568
def has_id(self, file_id):
569
return self._byid.has_key(file_id)
572
def rename(self, file_id, new_parent_id, new_name):
573
"""Move a file within the inventory.
575
This can change either the name, or the parent, or both.
577
This does not move the working file."""
578
if not is_valid_name(new_name):
579
raise BzrError("not an acceptable filename: %r" % new_name)
581
new_parent = self._byid[new_parent_id]
582
if new_name in new_parent.children:
583
raise BzrError("%r already exists in %r" % (new_name, self.id2path(new_parent_id)))
585
new_parent_idpath = self.get_idpath(new_parent_id)
586
if file_id in new_parent_idpath:
587
raise BzrError("cannot move directory %r into a subdirectory of itself, %r"
588
% (self.id2path(file_id), self.id2path(new_parent_id)))
590
file_ie = self._byid[file_id]
591
old_parent = self._byid[file_ie.parent_id]
593
# TODO: Don't leave things messed up if this fails
595
del old_parent.children[file_ie.name]
596
new_parent.children[new_name] = file_ie
598
file_ie.name = new_name
599
file_ie.parent_id = new_parent_id
606
def is_valid_name(name):
609
_NAME_RE = re.compile(r'^[^/\\]+$')
611
return bool(_NAME_RE.match(name))