62
63
# binaries, perhaps by naively splitting on \n or perhaps using
63
64
# something like a rolling checksum.
66
# TODO: Track version names as well as indexes.
65
68
# TODO: End marker for each version so we can stop reading?
67
70
# TODO: Check that no insertion occurs inside a deletion that was
76
79
# description of which revisions include it. Nice for checking all
77
80
# shas in parallel.
79
# TODO: Using a single _extract routine and then processing the output
80
# is probably inefficient. It's simple enough that we can afford to
81
# have slight specializations for different ways its used: annotate,
82
# basis for add, get, etc.
84
# TODO: Perhaps the API should work only in names to hide the integer
85
# indexes from the user?
174
166
each version; the parent's parents are implied.
177
List of hex SHA-1 of each version.
180
List of symbolic names for each version. Each should be unique.
183
For each name, the version number.
169
List of hex SHA-1 of each version, or None if not recorded.
186
__slots__ = ['_weave', '_parents', '_sha1s', '_names', '_name_map']
172
__slots__ = ['_weave', '_parents', '_sha1s']
188
174
def __init__(self):
190
176
self._parents = []
196
180
def __eq__(self, other):
197
181
if not isinstance(other, Weave):
199
183
return self._parents == other._parents \
200
and self._weave == other._weave \
201
and self._sha1s == other._sha1s
184
and self._weave == other._weave
204
187
def __ne__(self, other):
205
188
return not self.__eq__(other)
208
def lookup(self, name):
210
return self._name_map[name]
212
raise WeaveError("name %s not present in weave" % name)
215
def add(self, name, parents, text):
191
def add(self, parents, text):
216
192
"""Add a single text on top of the weave.
218
194
Returns the index number of the newly added version.
221
Symbolic name for this version.
222
(Typically the revision-id of the revision that added it.)
225
197
List or set of direct parent version numbers.
228
200
Sequence of lines to be added in the new version."""
230
assert isinstance(name, basestring)
231
if name in self._name_map:
232
raise WeaveError("name %r already present in weave" % name)
234
202
self._check_versions(parents)
235
203
## self._check_lines(text)
236
204
new_version = len(self._parents)
239
208
map(s.update, text)
240
209
sha1 = s.hexdigest()
243
# if we abort after here the (in-memory) weave will be corrupt because only
244
# some fields are updated
245
self._parents.append(parents[:])
212
# if we abort after here the weave will be corrupt
213
self._parents.append(frozenset(parents))
246
214
self._sha1s.append(sha1)
247
self._names.append(name)
248
self._name_map[name] = new_version
712
679
def weave_toc(w):
713
680
"""Show the weave's table-of-contents"""
714
print '%6s %50s %10s %10s' % ('ver', 'name', 'sha1', 'parents')
715
for i in (6, 50, 10, 10):
681
print '%6s %40s %20s' % ('ver', 'sha1', 'parents')
682
for i in (6, 40, 20):
718
685
for i in range(w.numversions()):
719
686
sha1 = w._sha1s[i]
721
parent_str = ' '.join(map(str, w._parents[i]))
722
print '%6d %-50.50s %10.10s %s' % (i, name, sha1, parent_str)
687
print '%6d %40s %s' % (i, sha1, ' '.join(map(str, w._parents[i])))
767
732
Check consistency of all versions.
768
733
weave toc WEAVEFILE
769
734
Display table of contents.
770
weave add WEAVEFILE NAME [BASE...] < NEWTEXT
735
weave add WEAVEFILE [BASE...] < NEWTEXT
771
736
Add NEWTEXT, with specified parent versions.
772
737
weave annotate WEAVEFILE VERSION
773
738
Display origin of each line.
781
746
% weave init foo.weave
783
% weave add foo.weave ver0 < foo.txt
748
% weave add foo.weave < foo.txt
786
751
(create updated version)
788
753
% weave get foo.weave 0 | diff -u - foo.txt
789
% weave add foo.weave ver1 0 < foo.txt
754
% weave add foo.weave 0 < foo.txt
792
757
% weave get foo.weave 0 > foo.txt (create forked version)
794
% weave add foo.weave ver2 0 < foo.txt
759
% weave add foo.weave 0 < foo.txt
797
762
% weave merge foo.weave 1 2 > foo.txt (merge them)
798
763
% vi foo.txt (resolve conflicts)
799
% weave add foo.weave merged 1 2 < foo.txt (commit merged version)
764
% weave add foo.weave 1 2 < foo.txt (commit merged version)
828
793
elif cmd == 'add':
830
795
# at the moment, based on everything in the file
832
parents = map(int, argv[4:])
796
parents = map(int, argv[3:])
833
797
lines = sys.stdin.readlines()
834
ver = w.add(name, parents, lines)
798
ver = w.add(parents, lines)
835
799
write_weave(w, file(argv[2], 'wb'))
836
print 'added version %r %d' % (name, ver)
800
print 'added version %d' % ver
837
801
elif cmd == 'init':
839
803
if os.path.exists(fn):