1
# Copyright (C) 2005, 2006, 2007, 2008 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
24
revision as _mod_revision,
26
from bzrlib.xml_serializer import SubElement, Element, Serializer
27
from bzrlib.inventory import ROOT_ID, Inventory, InventoryEntry
28
from bzrlib.revision import Revision
29
from bzrlib.errors import BzrError
36
"'":"'", # FIXME: overkill
43
def _ensure_utf8_re():
44
"""Make sure the _utf8_re and _unicode_re regexes have been compiled."""
45
global _utf8_re, _unicode_re
47
_utf8_re = re.compile('[&<>\'\"]|[\x80-\xff]+')
48
if _unicode_re is None:
49
_unicode_re = re.compile(u'[&<>\'\"\u0080-\uffff]')
52
def _unicode_escape_replace(match, _map=_xml_escape_map):
53
"""Replace a string of non-ascii, non XML safe characters with their escape
55
This will escape both Standard XML escapes, like <>"', etc.
56
As well as escaping non ascii characters, because ElementTree did.
57
This helps us remain compatible to older versions of bzr. We may change
58
our policy in the future, though.
60
# jam 20060816 Benchmarks show that try/KeyError is faster if you
61
# expect the entity to rarely miss. There is about a 10% difference
62
# in overall time. But if you miss frequently, then if None is much
63
# faster. For our use case, we *rarely* have a revision id, file id
64
# or path name that is unicode. So use try/KeyError.
66
return _map[match.group()]
68
return "&#%d;" % ord(match.group())
71
def _utf8_escape_replace(match, _map=_xml_escape_map):
72
"""Escape utf8 characters into XML safe ones.
74
This uses 2 tricks. It is either escaping "standard" characters, like "&<>,
75
or it is handling characters with the high-bit set. For ascii characters,
76
we just lookup the replacement in the dictionary. For everything else, we
77
decode back into Unicode, and then use the XML escape code.
80
return _map[match.group()]
82
return ''.join('&#%d;' % ord(uni_chr)
83
for uni_chr in match.group().decode('utf8'))
88
def _encode_and_escape(unicode_or_utf8_str, _map=_to_escaped_map):
89
"""Encode the string into utf8, and escape invalid XML characters"""
90
# We frequently get entities we have not seen before, so it is better
91
# to check if None, rather than try/KeyError
92
text = _map.get(unicode_or_utf8_str)
94
if unicode_or_utf8_str.__class__ == unicode:
95
# The alternative policy is to do a regular UTF8 encoding
96
# and then escape only XML meta characters.
97
# Performance is equivalent once you use cache_utf8. *However*
98
# this makes the serialized texts incompatible with old versions
99
# of bzr. So no net gain. (Perhaps the read code would handle utf8
100
# better than entity escapes, but cElementTree seems to do just fine
102
text = str(_unicode_re.sub(_unicode_escape_replace,
103
unicode_or_utf8_str)) + '"'
105
# Plain strings are considered to already be in utf-8 so we do a
106
# slightly different method for escaping.
107
text = _utf8_re.sub(_utf8_escape_replace,
108
unicode_or_utf8_str) + '"'
109
_map[unicode_or_utf8_str] = text
113
def _get_utf8_or_ascii(a_str,
114
_encode_utf8=cache_utf8.encode,
115
_get_cached_ascii=cache_utf8.get_cached_ascii):
116
"""Return a cached version of the string.
118
cElementTree will return a plain string if the XML is plain ascii. It only
119
returns Unicode when it needs to. We want to work in utf-8 strings. So if
120
cElementTree returns a plain string, we can just return the cached version.
121
If it is Unicode, then we need to encode it.
123
:param a_str: An 8-bit string or Unicode as returned by
124
cElementTree.Element.get()
125
:return: A utf-8 encoded 8-bit string.
127
# This is fairly optimized because we know what cElementTree does, this is
128
# not meant as a generic function for all cases. Because it is possible for
129
# an 8-bit string to not be ascii or valid utf8.
130
if a_str.__class__ == unicode:
131
return _encode_utf8(a_str)
133
return _get_cached_ascii(a_str)
137
"""Clean out the unicode => escaped map"""
138
_to_escaped_map.clear()
141
class Serializer_v8(Serializer):
142
"""This serialiser adds rich roots.
144
Its revision format number matches its inventory number.
150
support_altered_by_hack = True
151
# This format supports the altered-by hack that reads file ids directly out
152
# of the versionedfile, without doing XML parsing.
154
supported_kinds = set(['file', 'directory', 'symlink'])
156
revision_format_num = None
158
def _check_revisions(self, inv):
159
"""Extension point for subclasses to check during serialisation.
161
:param inv: An inventory about to be serialised, to be checked.
162
:raises: AssertionError if an error has occured.
164
if inv.revision_id is None:
165
raise AssertionError()
166
if inv.root.revision is None:
167
raise AssertionError()
169
def write_inventory_to_lines(self, inv):
170
"""Return a list of lines with the encoded inventory."""
171
return self.write_inventory(inv, None)
173
def write_inventory_to_string(self, inv, working=False):
174
"""Just call write_inventory with a StringIO and return the value.
176
:param working: If True skip history data - text_sha1, text_size,
177
reference_revision, symlink_target.
179
sio = cStringIO.StringIO()
180
self.write_inventory(inv, sio, working)
181
return sio.getvalue()
183
def write_inventory(self, inv, f, working=False):
184
"""Write inventory to a file.
186
:param inv: the inventory to write.
187
:param f: the file to write. (May be None if the lines are the desired
189
:param working: If True skip history data - text_sha1, text_size,
190
reference_revision, symlink_target.
191
:return: The inventory as a list of lines.
194
self._check_revisions(inv)
196
append = output.append
197
self._append_inventory_root(append, inv)
198
entries = inv.iter_entries()
200
root_path, root_ie = entries.next()
201
for path, ie in entries:
202
if ie.parent_id != self.root_id:
203
parent_str = ' parent_id="'
204
parent_id = _encode_and_escape(ie.parent_id)
208
if ie.kind == 'file':
210
executable = ' executable="yes"'
214
append('<file%s file_id="%s name="%s%s%s revision="%s '
215
'text_sha1="%s" text_size="%d" />\n' % (
216
executable, _encode_and_escape(ie.file_id),
217
_encode_and_escape(ie.name), parent_str, parent_id,
218
_encode_and_escape(ie.revision), ie.text_sha1,
221
append('<file%s file_id="%s name="%s%s%s />\n' % (
222
executable, _encode_and_escape(ie.file_id),
223
_encode_and_escape(ie.name), parent_str, parent_id))
224
elif ie.kind == 'directory':
226
append('<directory file_id="%s name="%s%s%s revision="%s '
228
_encode_and_escape(ie.file_id),
229
_encode_and_escape(ie.name),
230
parent_str, parent_id,
231
_encode_and_escape(ie.revision)))
233
append('<directory file_id="%s name="%s%s%s />\n' % (
234
_encode_and_escape(ie.file_id),
235
_encode_and_escape(ie.name),
236
parent_str, parent_id))
237
elif ie.kind == 'symlink':
239
append('<symlink file_id="%s name="%s%s%s revision="%s '
240
'symlink_target="%s />\n' % (
241
_encode_and_escape(ie.file_id),
242
_encode_and_escape(ie.name),
243
parent_str, parent_id,
244
_encode_and_escape(ie.revision),
245
_encode_and_escape(ie.symlink_target)))
247
append('<symlink file_id="%s name="%s%s%s />\n' % (
248
_encode_and_escape(ie.file_id),
249
_encode_and_escape(ie.name),
250
parent_str, parent_id))
251
elif ie.kind == 'tree-reference':
252
if ie.kind not in self.supported_kinds:
253
raise errors.UnsupportedInventoryKind(ie.kind)
255
append('<tree-reference file_id="%s name="%s%s%s '
256
'revision="%s reference_revision="%s />\n' % (
257
_encode_and_escape(ie.file_id),
258
_encode_and_escape(ie.name),
259
parent_str, parent_id,
260
_encode_and_escape(ie.revision),
261
_encode_and_escape(ie.reference_revision)))
263
append('<tree-reference file_id="%s name="%s%s%s />\n' % (
264
_encode_and_escape(ie.file_id),
265
_encode_and_escape(ie.name),
266
parent_str, parent_id))
268
raise errors.UnsupportedInventoryKind(ie.kind)
269
append('</inventory>\n')
272
# Just to keep the cache from growing without bounds
273
# but we may actually not want to do clear the cache
277
def _append_inventory_root(self, append, inv):
278
"""Append the inventory root to output."""
279
if inv.revision_id is not None:
280
revid1 = ' revision_id="'
281
revid2 = _encode_and_escape(inv.revision_id)
285
append('<inventory format="%s"%s%s>\n' % (
286
self.format_num, revid1, revid2))
287
append('<directory file_id="%s name="%s revision="%s />\n' % (
288
_encode_and_escape(inv.root.file_id),
289
_encode_and_escape(inv.root.name),
290
_encode_and_escape(inv.root.revision)))
292
def _pack_revision(self, rev):
293
"""Revision object -> xml tree"""
294
# For the XML format, we need to write them as Unicode rather than as
295
# utf-8 strings. So that cElementTree can handle properly escaping
297
decode_utf8 = cache_utf8.decode
298
revision_id = rev.revision_id
299
if isinstance(revision_id, str):
300
revision_id = decode_utf8(revision_id)
301
format_num = self.format_num
302
if self.revision_format_num is not None:
303
format_num = self.revision_format_num
304
root = Element('revision',
305
committer = rev.committer,
306
timestamp = '%.3f' % rev.timestamp,
307
revision_id = revision_id,
308
inventory_sha1 = rev.inventory_sha1,
311
if rev.timezone is not None:
312
root.set('timezone', str(rev.timezone))
314
msg = SubElement(root, 'message')
315
msg.text = rev.message
318
pelts = SubElement(root, 'parents')
319
pelts.tail = pelts.text = '\n'
320
for parent_id in rev.parent_ids:
321
_mod_revision.check_not_reserved_id(parent_id)
322
p = SubElement(pelts, 'revision_ref')
324
if isinstance(parent_id, str):
325
parent_id = decode_utf8(parent_id)
326
p.set('revision_id', parent_id)
328
self._pack_revision_properties(rev, root)
331
def _pack_revision_properties(self, rev, under_element):
332
top_elt = SubElement(under_element, 'properties')
333
for prop_name, prop_value in sorted(rev.properties.items()):
334
prop_elt = SubElement(top_elt, 'property')
335
prop_elt.set('name', prop_name)
336
prop_elt.text = prop_value
340
def _unpack_inventory(self, elt, revision_id=None):
341
"""Construct from XML Element"""
342
if elt.tag != 'inventory':
343
raise errors.UnexpectedInventoryFormat('Root tag is %r' % elt.tag)
344
format = elt.get('format')
345
if format != self.format_num:
346
raise errors.UnexpectedInventoryFormat('Invalid format version %r'
348
revision_id = elt.get('revision_id')
349
if revision_id is not None:
350
revision_id = cache_utf8.encode(revision_id)
351
inv = inventory.Inventory(root_id=None, revision_id=revision_id)
353
ie = self._unpack_entry(e)
357
def _unpack_entry(self, elt):
359
if not InventoryEntry.versionable_kind(kind):
360
raise AssertionError('unsupported entry kind %s' % kind)
362
get_cached = _get_utf8_or_ascii
364
parent_id = elt.get('parent_id')
365
if parent_id is not None:
366
parent_id = get_cached(parent_id)
367
file_id = get_cached(elt.get('file_id'))
369
if kind == 'directory':
370
ie = inventory.InventoryDirectory(file_id,
374
ie = inventory.InventoryFile(file_id,
377
ie.text_sha1 = elt.get('text_sha1')
378
if elt.get('executable') == 'yes':
380
v = elt.get('text_size')
381
ie.text_size = v and int(v)
382
elif kind == 'symlink':
383
ie = inventory.InventoryLink(file_id,
386
ie.symlink_target = elt.get('symlink_target')
388
raise errors.UnsupportedInventoryKind(kind)
389
revision = elt.get('revision')
390
if revision is not None:
391
revision = get_cached(revision)
392
ie.revision = revision
396
def _unpack_revision(self, elt):
397
"""XML Element -> Revision object"""
398
format = elt.get('format')
399
format_num = self.format_num
400
if self.revision_format_num is not None:
401
format_num = self.revision_format_num
402
if format is not None:
403
if format != format_num:
404
raise BzrError("invalid format version %r on revision"
406
get_cached = _get_utf8_or_ascii
407
rev = Revision(committer = elt.get('committer'),
408
timestamp = float(elt.get('timestamp')),
409
revision_id = get_cached(elt.get('revision_id')),
410
inventory_sha1 = elt.get('inventory_sha1')
412
parents = elt.find('parents') or []
414
rev.parent_ids.append(get_cached(p.get('revision_id')))
415
self._unpack_revision_properties(elt, rev)
416
v = elt.get('timezone')
420
rev.timezone = int(v)
421
rev.message = elt.findtext('message') # text of <message>
424
def _unpack_revision_properties(self, elt, rev):
425
"""Unpack properties onto a revision."""
426
props_elt = elt.find('properties')
429
for prop_elt in props_elt:
430
if prop_elt.tag != 'property':
431
raise AssertionError(
432
"bad tag under properties list: %r" % prop_elt.tag)
433
name = prop_elt.get('name')
434
value = prop_elt.text
435
# If a property had an empty value ('') cElementTree reads
436
# that back as None, convert it back to '', so that all
437
# properties have string values
440
if name in rev.properties:
441
raise AssertionError("repeated property %r" % name)
442
rev.properties[name] = value
445
serializer_v8 = Serializer_v8()
added
removed
bzrlib/xml8.py
