3
Read in a bundle stream, and process it into a BundleReader object.
1
# Copyright (C) 2006 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
"""Read in a bundle stream, and process it into a BundleReader object."""
7
20
from cStringIO import StringIO
11
28
from bzrlib.errors import (TestamentMismatch, BzrError,
12
MalformedHeader, MalformedPatches)
13
from bzrlib.bundle.common import get_header, header_str
29
MalformedHeader, MalformedPatches, NotABundle)
14
30
from bzrlib.inventory import (Inventory, InventoryEntry,
15
31
InventoryDirectory, InventoryFile,
17
from bzrlib.osutils import sha_file, sha_string
33
from bzrlib.osutils import sha_file, sha_string, pathjoin
18
34
from bzrlib.revision import Revision, NULL_REVISION
19
35
from bzrlib.testament import StrictTestament
20
36
from bzrlib.trace import mutter, warning
37
import bzrlib.transport
21
38
from bzrlib.tree import Tree
39
import bzrlib.urlutils
22
40
from bzrlib.xml5 import serializer_v5
153
171
raise KeyError(revision_id)
156
class BundleReader(object):
157
"""This class reads in a bundle from a file, and returns
158
a Bundle object, which can then be applied against a tree.
160
def __init__(self, from_file):
161
"""Read in the bundle from the file.
163
:param from_file: A file-like object (must have iterator support).
165
object.__init__(self)
166
self.from_file = iter(from_file)
167
self._next_line = None
169
self.info = BundleInfo()
170
# We put the actual inventory ids in the footer, so that the patch
171
# is easier to read for humans.
172
# Unfortunately, that means we need to read everything before we
173
# can create a proper bundle.
179
while self._next_line is not None:
180
self._read_revision_header()
181
if self._next_line is None:
187
"""Make sure that the information read in makes sense
188
and passes appropriate checksums.
190
# Fill in all the missing blanks for the revisions
191
# and generate the real_revisions list.
192
self.info.complete_info()
194
def _validate_revision(self, inventory, revision_id):
195
"""Make sure all revision entries match their checksum."""
197
# This is a mapping from each revision id to it's sha hash
200
rev = self.info.get_revision(revision_id)
201
rev_info = self.info.get_revision_info(revision_id)
202
assert rev.revision_id == rev_info.revision_id
203
assert rev.revision_id == revision_id
204
sha1 = StrictTestament(rev, inventory).as_sha1()
205
if sha1 != rev_info.sha1:
206
raise TestamentMismatch(rev.revision_id, rev_info.sha1, sha1)
207
if rev_to_sha1.has_key(rev.revision_id):
208
raise BzrError('Revision {%s} given twice in the list'
210
rev_to_sha1[rev.revision_id] = sha1
173
def revision_tree(self, repository, revision_id, base=None):
174
revision_id = osutils.safe_revision_id(revision_id)
175
revision = self.get_revision(revision_id)
176
base = self.get_base(revision)
177
assert base != revision_id
178
self._validate_references_from_repository(repository)
179
revision_info = self.get_revision_info(revision_id)
180
inventory_revision_id = revision_id
181
bundle_tree = BundleTree(repository.revision_tree(base),
182
inventory_revision_id)
183
self._update_tree(bundle_tree, revision_id)
185
inv = bundle_tree.inventory
186
self._validate_inventory(inv, revision_id)
187
self._validate_revision(inv, revision_id)
212
191
def _validate_references_from_repository(self, repository):
213
192
"""Now that we have a repository which should have some of the
289
269
s = serializer_v5.write_inventory_to_string(inv)
290
270
sha1 = sha_string(s)
291
271
# Target revision is the last entry in the real_revisions list
292
rev = self.info.get_revision(revision_id)
272
rev = self.get_revision(revision_id)
293
273
assert rev.revision_id == revision_id
294
274
if sha1 != rev.inventory_sha1:
295
275
open(',,bogus-inv', 'wb').write(s)
296
276
warning('Inventory sha hash mismatch for revision %s. %s'
297
277
' != %s' % (revision_id, sha1, rev.inventory_sha1))
299
def get_bundle(self, repository):
300
"""Return the meta information, and a Bundle tree which can
301
be used to populate the local stores and working tree, respectively.
303
return self.info, self.revision_tree(repository, self.info.target)
305
def revision_tree(self, repository, revision_id, base=None):
306
revision = self.info.get_revision(revision_id)
307
base = self.info.get_base(revision)
308
assert base != revision_id
309
self._validate_references_from_repository(repository)
310
revision_info = self.info.get_revision_info(revision_id)
311
inventory_revision_id = revision_id
312
bundle_tree = BundleTree(repository.revision_tree(base),
313
inventory_revision_id)
314
self._update_tree(bundle_tree, revision_id)
316
inv = bundle_tree.inventory
317
self._validate_inventory(inv, revision_id)
318
self._validate_revision(inv, revision_id)
323
"""yield the next line, but secretly
324
keep 1 extra line for peeking.
326
for line in self.from_file:
327
last = self._next_line
328
self._next_line = line
330
#mutter('yielding line: %r' % last)
332
last = self._next_line
333
self._next_line = None
334
#mutter('yielding line: %r' % last)
337
def _read_header(self):
338
"""Read the bzr header"""
339
header = get_header()
341
for line in self._next():
343
# not all mailers will keep trailing whitespace
346
if (not line.startswith('# ') or not line.endswith('\n')
347
or line[2:-1].decode('utf-8') != header[0]):
348
raise MalformedHeader('Found a header, but it'
349
' was improperly formatted')
350
header.pop(0) # We read this line.
352
break # We found everything.
353
elif (line.startswith('#') and line.endswith('\n')):
354
line = line[1:-1].strip().decode('utf-8')
355
if line[:len(header_str)] == header_str:
356
if line == header[0]:
359
raise MalformedHeader('Found what looks like'
360
' a header, but did not match')
363
raise MalformedHeader('Did not find an opening header')
365
def _read_revision_header(self):
366
self.info.revisions.append(RevisionInfo(None))
367
for line in self._next():
368
# The bzr header is terminated with a blank line
369
# which does not start with '#'
370
if line is None or line == '\n':
372
self._handle_next(line)
374
def _read_next_entry(self, line, indent=1):
375
"""Read in a key-value pair
377
if not line.startswith('#'):
378
raise MalformedHeader('Bzr header did not start with #')
379
line = line[1:-1].decode('utf-8') # Remove the '#' and '\n'
380
if line[:indent] == ' '*indent:
383
return None, None# Ignore blank lines
385
loc = line.find(': ')
390
value = self._read_many(indent=indent+2)
391
elif line[-1:] == ':':
393
value = self._read_many(indent=indent+2)
395
raise MalformedHeader('While looking for key: value pairs,'
396
' did not find the colon %r' % (line))
398
key = key.replace(' ', '_')
399
#mutter('found %s: %s' % (key, value))
402
def _handle_next(self, line):
405
key, value = self._read_next_entry(line, indent=1)
406
mutter('_handle_next %r => %r' % (key, value))
410
revision_info = self.info.revisions[-1]
411
if hasattr(revision_info, key):
412
if getattr(revision_info, key) is None:
413
setattr(revision_info, key, value)
415
raise MalformedHeader('Duplicated Key: %s' % key)
417
# What do we do with a key we don't recognize
418
raise MalformedHeader('Unknown Key: "%s"' % key)
420
def _read_many(self, indent):
421
"""If a line ends with no entry, that means that it should be
422
followed with multiple lines of values.
424
This detects the end of the list, because it will be a line that
425
does not start properly indented.
428
start = '#' + (' '*indent)
430
if self._next_line is None or self._next_line[:len(start)] != start:
433
for line in self._next():
434
values.append(line[len(start):-1].decode('utf-8'))
435
if self._next_line is None or self._next_line[:len(start)] != start:
439
def _read_one_patch(self):
440
"""Read in one patch, return the complete patch, along with
443
:return: action, lines, do_continue
445
#mutter('_read_one_patch: %r' % self._next_line)
446
# Peek and see if there are no patches
447
if self._next_line is None or self._next_line.startswith('#'):
448
return None, [], False
452
for line in self._next():
454
if not line.startswith('==='):
455
raise MalformedPatches('The first line of all patches'
456
' should be a bzr meta line "==="'
458
action = line[4:-1].decode('utf-8')
459
elif line.startswith('... '):
460
action += line[len('... '):-1].decode('utf-8')
462
if (self._next_line is not None and
463
self._next_line.startswith('===')):
464
return action, lines, True
465
elif self._next_line is None or self._next_line.startswith('#'):
466
return action, lines, False
470
elif not line.startswith('... '):
473
return action, lines, False
475
def _read_patches(self):
477
revision_actions = []
479
action, lines, do_continue = self._read_one_patch()
480
if action is not None:
481
revision_actions.append((action, lines))
482
assert self.info.revisions[-1].tree_actions is None
483
self.info.revisions[-1].tree_actions = revision_actions
485
def _read_footer(self):
486
"""Read the rest of the meta information.
488
:param first_line: The previous step iterates past what it
489
can handle. That extra line is given here.
491
for line in self._next():
492
self._handle_next(line)
493
if not self._next_line.startswith('#'):
496
if self._next_line is None:
279
def _validate_revision(self, inventory, revision_id):
280
"""Make sure all revision entries match their checksum."""
282
# This is a mapping from each revision id to it's sha hash
285
rev = self.get_revision(revision_id)
286
rev_info = self.get_revision_info(revision_id)
287
assert rev.revision_id == rev_info.revision_id
288
assert rev.revision_id == revision_id
289
sha1 = self._testament_sha1(rev, inventory)
290
if sha1 != rev_info.sha1:
291
raise TestamentMismatch(rev.revision_id, rev_info.sha1, sha1)
292
if rev.revision_id in rev_to_sha1:
293
raise BzrError('Revision {%s} given twice in the list'
295
rev_to_sha1[rev.revision_id] = sha1
499
297
def _update_tree(self, bundle_tree, revision_id):
500
298
"""This fills out a BundleTree based on the information
added
removed
bzrlib/bundle/bundle_data.py
