1
# Copyright (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
17
"""Tree classes, representing directory at point in time.
21
import os.path, os, fnmatch
23
from inventory import Inventory
24
from trace import mutter, note
25
from osutils import pumpfile, compare_files, filesize, quotefn, sha_file, \
26
joinpath, splitpath, appendpath, isdir, isfile, file_kind, fingerprint_file
27
from errors import bailout
29
from stat import S_ISREG, S_ISDIR, ST_MODE, ST_SIZE
34
"""Abstract file tree.
36
There are several subclasses:
38
* `WorkingTree` exists as files on disk editable by the user.
40
* `RevisionTree` is a tree as recorded at some point in the past.
44
Trees contain an `Inventory` object, and also know how to retrieve
45
file texts mentioned in the inventory, either from a working
46
directory or from a store.
48
It is possible for trees to contain files that are not described
49
in their inventory or vice versa; for this use `filenames()`.
51
Trees can be compared, etc, regardless of whether they are working
52
trees or versioned trees.
55
def has_filename(self, filename):
56
"""True if the tree has given filename."""
57
raise NotImplementedError()
59
def has_id(self, file_id):
60
return self.inventory.has_id(file_id)
63
"""Return set of all ids in this tree."""
64
return self.inventory.id_set()
66
def id2path(self, file_id):
67
return self.inventory.id2path(file_id)
69
def _get_inventory(self):
70
return self._inventory
72
inventory = property(_get_inventory,
73
doc="Inventory of this Tree")
75
def _check_retrieved(self, ie, f):
76
fp = fingerprint_file(f)
79
if ie.text_size is not None:
80
if ie.text_size != fp['size']:
81
bailout("mismatched size for file %r in %r" % (ie.file_id, self._store),
82
["inventory expects %d bytes" % ie.text_size,
83
"file is actually %d bytes" % fp['size'],
84
"store is probably damaged/corrupt"])
86
if ie.text_sha1 != fp['sha1']:
87
bailout("wrong SHA-1 for file %r in %r" % (ie.file_id, self._store),
88
["inventory expects %s" % ie.text_sha1,
89
"file is actually %s" % fp['sha1'],
90
"store is probably damaged/corrupt"])
93
def export(self, dest):
94
"""Export this tree to a new directory.
96
`dest` should not exist, and will be created holding the
97
contents of this tree.
99
:todo: To handle subdirectories we need to create the
102
:note: If the export fails, the destination directory will be
103
left in a half-assed state.
106
mutter('export version %r' % self)
108
for dp, ie in inv.iter_entries():
110
fullpath = appendpath(dest, dp)
111
if kind == 'directory':
114
pumpfile(self.get_file(ie.file_id), file(fullpath, 'wb'))
116
bailout("don't know how to export {%s} of kind %r", fid, kind)
117
mutter(" export {%s} kind %s to %s" % (ie.file_id, kind, fullpath))
121
class WorkingTree(Tree):
122
"""Working copy tree.
124
The inventory is held in the `Branch` working-inventory, and the
125
files are in a directory on disk.
127
It is possible for a `WorkingTree` to have a filename which is
128
not listed in the Inventory and vice versa.
130
def __init__(self, basedir, inv):
131
self._inventory = inv
132
self.basedir = basedir
133
self.path2id = inv.path2id
136
return "<%s of %s>" % (self.__class__.__name__,
139
def abspath(self, filename):
140
return os.path.join(self.basedir, filename)
142
def has_filename(self, filename):
143
return os.path.exists(self.abspath(filename))
145
def get_file(self, file_id):
146
return self.get_file_byname(self.id2path(file_id))
148
def get_file_byname(self, filename):
149
return file(self.abspath(filename), 'rb')
151
def _get_store_filename(self, file_id):
152
return self.abspath(self.id2path(file_id))
154
def has_id(self, file_id):
155
# files that have been deleted are excluded
156
if not self.inventory.has_id(file_id):
158
return os.access(self.abspath(self.inventory.id2path(file_id)), os.F_OK)
160
def get_file_size(self, file_id):
161
return os.stat(self._get_store_filename(file_id))[ST_SIZE]
163
def get_file_sha1(self, file_id):
164
f = self.get_file(file_id)
168
def file_class(self, filename):
169
if self.path2id(filename):
171
elif self.is_ignored(filename):
177
def list_files(self):
178
"""Recursively list all files as (path, class, kind, id).
180
Lists, but does not descend into unversioned directories.
182
This does not include files that have been deleted in this
185
Skips the control directory.
189
def descend(from_dir, from_dir_id, dp):
193
## TODO: If we find a subdirectory with its own .bzr
194
## directory, then that is a separate tree and we
195
## should exclude it.
196
if bzrlib.BZRDIR == f:
200
fp = appendpath(from_dir, f)
203
fap = appendpath(dp, f)
205
f_ie = inv.get_child(from_dir_id, f)
208
elif self.is_ignored(fp):
217
bailout("file %r entered as kind %r id %r, now of kind %r"
218
% (fap, f_ie.kind, f_ie.file_id, fk))
220
yield fp, c, fk, (f_ie and f_ie.file_id)
222
if fk != 'directory':
226
# don't descend unversioned directories
229
for ff in descend(fp, f_ie.file_id, fap):
232
for f in descend('', None, self.basedir):
237
def unknowns(self, path='', dir_id=None):
238
"""Yield names of unknown files in this WorkingTree.
240
If there are any unknown directories then only the directory is
241
returned, not all its children. But if there are unknown files
242
under a versioned subdirectory, they are returned.
244
Currently returned depth-first, sorted by name within directories.
246
for fpath, fclass, fkind, fid in self.list_files():
251
def ignored_files(self):
252
for fpath, fclass, fkind, fid in self.list_files():
257
def get_ignore_list(self):
258
"""Return list of ignore patterns.
260
Cached in the Tree object after the first call.
262
if hasattr(self, '_ignorelist'):
263
return self._ignorelist
265
l = bzrlib.DEFAULT_IGNORE[:]
266
if self.has_filename(bzrlib.IGNORE_FILENAME):
267
f = self.get_file_byname(bzrlib.IGNORE_FILENAME)
268
l.extend([line.rstrip("\n\r") for line in f.readlines()])
273
def is_ignored(self, filename):
274
"""Check whether the filename matches an ignore pattern.
276
Patterns containing '/' need to match the whole path; others
277
match against only the last component.
279
If the file is ignored, returns the pattern which caused it to
280
be ignored, otherwise None. So this can simply be used as a
281
boolean if desired."""
283
## TODO: Use '**' to match directories, and other extended globbing stuff from cvs/rsync.
285
for pat in self.get_ignore_list():
287
if fnmatch.fnmatchcase(filename, pat):
290
if fnmatch.fnmatchcase(splitpath(filename)[-1], pat):
298
class RevisionTree(Tree):
299
"""Tree viewing a previous revision.
301
File text can be retrieved from the text store.
303
:todo: Some kind of `__repr__` method, but a good one
304
probably means knowing the branch and revision number,
305
or at least passing a description to the constructor.
308
def __init__(self, store, inv):
310
self._inventory = inv
312
def get_file(self, file_id):
313
ie = self._inventory[file_id]
314
f = self._store[ie.text_id]
315
mutter(" get fileid{%s} from %r" % (file_id, self))
316
self._check_retrieved(ie, f)
319
def get_file_size(self, file_id):
320
return self._inventory[file_id].text_size
322
def get_file_sha1(self, file_id):
323
ie = self._inventory[file_id]
326
def has_filename(self, filename):
327
return bool(self.inventory.path2id(filename))
329
def list_files(self):
330
# The only files returned by this are those from the version
331
for path, entry in self.inventory.iter_entries():
332
yield path, 'V', entry.kind, entry.file_id
335
class EmptyTree(Tree):
337
self._inventory = Inventory()
339
def has_filename(self, filename):
342
def list_files(self):
343
if False: # just to make it a generator
348
######################################################################
351
# TODO: Merge these two functions into a single one that can operate
352
# on either a whole tree or a set of files.
354
# TODO: Return the diff in order by filename, not by category or in
355
# random order. Can probably be done by lock-stepping through the
356
# filenames from both trees.
359
def file_status(filename, old_tree, new_tree):
360
"""Return single-letter status, old and new names for a file.
362
The complexity here is in deciding how to represent renames;
363
many complex cases are possible.
365
old_inv = old_tree.inventory
366
new_inv = new_tree.inventory
367
new_id = new_inv.path2id(filename)
368
old_id = old_inv.path2id(filename)
370
if not new_id and not old_id:
371
# easy: doesn't exist in either; not versioned at all
372
if new_tree.is_ignored(filename):
373
return 'I', None, None
375
return '?', None, None
377
# There is now a file of this name, great.
380
# There is no longer a file of this name, but we can describe
381
# what happened to the file that used to have
382
# this name. There are two possibilities: either it was
383
# deleted entirely, or renamed.
385
if new_inv.has_id(old_id):
386
return 'X', old_inv.id2path(old_id), new_inv.id2path(old_id)
388
return 'D', old_inv.id2path(old_id), None
390
# if the file_id is new in this revision, it is added
391
if new_id and not old_inv.has_id(new_id):
394
# if there used to be a file of this name, but that ID has now
395
# disappeared, it is deleted
396
if old_id and not new_inv.has_id(old_id):