13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
122
124
help_txt = """A parsed revision specification.
124
A revision specification is a string, which may be unambiguous about
125
what it represents by giving a prefix like 'date:' or 'revid:' etc,
126
or it may have no prefix, in which case it's tried against several
127
specifier types in sequence to determine what the user meant.
126
A revision specification can be an integer, in which case it is
127
assumed to be a revno (though this will translate negative values
128
into positive ones); or it can be a string, in which case it is
129
parsed for something like 'date:' or 'revid:' etc.
129
131
Revision specs are an UI element, and they have been moved out
130
132
of the branch class to leave "back-end" classes unaware of such
139
141
wants_revision_history = True
140
dwim_catchable_exceptions = (errors.InvalidRevisionSpec,)
141
"""Exceptions that RevisionSpec_dwim._match_on will catch.
143
If the revspec is part of ``dwim_revspecs``, it may be tried with an
144
invalid revspec and raises some exception. The exceptions mentioned here
145
will not be reported to the user but simply ignored without stopping the
143
def __new__(cls, spec, _internal=False):
145
return object.__new__(cls, spec, _internal=_internal)
147
symbol_versioning.warn('Creating a RevisionSpec directly has'
148
' been deprecated in version 0.11. Use'
149
' RevisionSpec.from_string()'
151
DeprecationWarning, stacklevel=2)
152
return RevisionSpec.from_string(spec)
150
155
def from_string(spec):
161
166
return RevisionSpec(None, _internal=True)
162
match = revspec_registry.get_prefix(spec)
163
if match is not None:
164
spectype, specsuffix = match
165
trace.mutter('Returning RevisionSpec %s for %s',
166
spectype.__name__, spec)
167
return spectype(spec, _internal=True)
167
for spectype in SPEC_TYPES:
168
if spec.startswith(spectype.prefix):
169
trace.mutter('Returning RevisionSpec %s for %s',
170
spectype.__name__, spec)
171
return spectype(spec, _internal=True)
169
for spectype in SPEC_TYPES:
170
if spec.startswith(spectype.prefix):
171
trace.mutter('Returning RevisionSpec %s for %s',
172
spectype.__name__, spec)
173
return spectype(spec, _internal=True)
174
# Otherwise treat it as a DWIM, build the RevisionSpec object and
175
# wait for _match_on to be called.
176
return RevisionSpec_dwim(spec, _internal=True)
173
# RevisionSpec_revno is special cased, because it is the only
174
# one that directly handles plain integers
175
# TODO: This should not be special cased rather it should be
176
# a method invocation on spectype.canparse()
178
if _revno_regex is None:
179
_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
180
if _revno_regex.match(spec) is not None:
181
return RevisionSpec_revno(spec, _internal=True)
183
raise errors.NoSuchRevisionSpec(spec)
178
185
def __init__(self, spec, _internal=False):
179
186
"""Create a RevisionSpec referring to the Null revision.
248
256
return self.in_history(context_branch).rev_id
250
def as_tree(self, context_branch):
251
"""Return the tree object for this revisions spec.
253
Some revision specs require a context_branch to be able to determine
254
the revision id and access the repository. Not all specs will make
257
return self._as_tree(context_branch)
259
def _as_tree(self, context_branch):
260
"""Implementation of as_tree().
262
Classes should override this function to provide appropriate
263
functionality. The default is to just call '.as_revision_id()'
264
and get the revision tree from context_branch's repository.
266
revision_id = self.as_revision_id(context_branch)
267
return context_branch.repository.revision_tree(revision_id)
269
258
def __repr__(self):
270
259
# this is mostly for helping with testing
271
260
return '<%s %s>' % (self.__class__.__name__,
274
263
def needs_branch(self):
275
264
"""Whether this revision spec needs a branch.
291
class RevisionSpec_dwim(RevisionSpec):
292
"""Provides a DWIMish revision specifier lookup.
294
Note that this does not go in the revspec_registry because by definition
295
there is no prefix to identify it. It's solely called from
296
RevisionSpec.from_string() because the DWIMification happen when _match_on
297
is called so the string describing the revision is kept here until needed.
301
# We don't need to build the revision history ourself, that's delegated to
302
# each revspec we try.
303
wants_revision_history = False
305
def _try_spectype(self, rstype, branch):
306
rs = rstype(self.spec, _internal=True)
307
# Hit in_history to find out if it exists, or we need to try the
309
return rs.in_history(branch)
311
def _match_on(self, branch, revs):
312
"""Run the lookup and see what we can get."""
314
# First, see if it's a revno
316
if _revno_regex is None:
317
_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
318
if _revno_regex.match(self.spec) is not None:
320
return self._try_spectype(RevisionSpec_revno, branch)
321
except RevisionSpec_revno.dwim_catchable_exceptions:
324
# Next see what has been registered
325
for rs_class in dwim_revspecs:
327
return self._try_spectype(rs_class, branch)
328
except rs_class.dwim_catchable_exceptions:
331
# Well, I dunno what it is. Note that we don't try to keep track of the
332
# first of last exception raised during the DWIM tries as none seems
334
raise errors.InvalidRevisionSpec(self.spec, branch)
337
280
class RevisionSpec_revno(RevisionSpec):
338
281
"""Selects a revision using a number."""
340
283
help_txt = """Selects a revision using a number.
342
285
Use an integer to specify a revision in the history of the branch.
343
Optionally a branch can be specified. A negative number will count
344
from the end of the branch (-1 is the last revision, -2 the previous
345
one). If the negative number is larger than the branch's history, the
346
first revision is returned.
286
Optionally a branch can be specified. The 'revno:' prefix is optional.
287
A negative number will count from the end of the branch (-1 is the
288
last revision, -2 the previous one). If the negative number is larger
289
than the branch's history, the first revision is returned.
349
revno:1 -> return the first revision of this branch
292
revno:1 -> return the first revision
350
293
revno:3:/path/to/branch -> return the 3rd revision of
351
294
the branch '/path/to/branch'
352
295
revno:-1 -> The last revision in a branch.
401
344
revs_or_none = None
405
revision_id = branch.dotted_revno_to_revision_id(match_revno,
407
except errors.NoSuchRevision:
408
raise errors.InvalidRevisionSpec(self.user_spec, branch)
349
revision_id_to_revno = branch.get_revision_id_to_revno_map()
350
revisions = [revision_id for revision_id, revno
351
in revision_id_to_revno.iteritems()
352
if revno == match_revno]
355
if len(revisions) != 1:
356
return branch, None, None
410
358
# there is no traditional 'revno' for dotted-decimal revnos.
411
359
# so for API compatability we return None.
412
return branch, None, revision_id
360
return branch, None, revisions[0]
414
362
last_revno, last_revision_id = branch.last_revision_info()
528
479
help_txt = """Selects the parent of the revision specified.
530
Supply any revision spec to return the parent of that revision. This is
531
mostly useful when inspecting revisions that are not in the revision history
481
Supply any revision spec to return the parent of that revision.
534
482
It is an error to request the parent of the null revision (before:0).
483
This is mostly useful when inspecting revisions that are not in the
484
revision history of a branch.
538
488
before:1913 -> Return the parent of revno 1913 (revno 1912)
539
489
before:revid:aaaa@bbbb-1234567890 -> return the parent of revision
540
490
aaaa@bbbb-1234567890
541
bzr diff -r before:1913..1913
542
-> Find the changes between revision 1913 and its parent (1912).
543
(What changes did revision 1913 introduce).
544
This is equivalent to: bzr diff -c 1913
491
bzr diff -r before:revid:aaaa..revid:aaaa
492
-> Find the changes between revision 'aaaa' and its parent.
493
(what changes did 'aaaa' introduce)
547
496
prefix = 'before:'
549
498
def _match_on(self, branch, revs):
550
499
r = RevisionSpec.from_string(self.spec)._match_on(branch, revs)
831
780
raise errors.NoCommits(other_branch)
832
781
return last_revision
834
def _as_tree(self, context_branch):
835
from bzrlib.branch import Branch
836
other_branch = Branch.open(self.spec)
837
last_revision = other_branch.last_revision()
838
last_revision = revision.ensure_null(last_revision)
839
if last_revision == revision.NULL_REVISION:
840
raise errors.NoCommits(other_branch)
841
return other_branch.repository.revision_tree(last_revision)
783
SPEC_TYPES.append(RevisionSpec_branch)
845
786
class RevisionSpec_submit(RevisionSpec_ancestor):
884
825
self._get_submit_location(context_branch))
887
# The order in which we want to DWIM a revision spec without any prefix.
888
# revno is always tried first and isn't listed here, this is used by
889
# RevisionSpec_dwim._match_on
891
RevisionSpec_tag, # Let's try for a tag
892
RevisionSpec_revid, # Maybe it's a revid?
893
RevisionSpec_date, # Perhaps a date?
894
RevisionSpec_branch, # OK, last try, maybe it's a branch
898
revspec_registry = registry.Registry()
899
def _register_revspec(revspec):
900
revspec_registry.register(revspec.prefix, revspec)
902
_register_revspec(RevisionSpec_revno)
903
_register_revspec(RevisionSpec_revid)
904
_register_revspec(RevisionSpec_last)
905
_register_revspec(RevisionSpec_before)
906
_register_revspec(RevisionSpec_tag)
907
_register_revspec(RevisionSpec_date)
908
_register_revspec(RevisionSpec_ancestor)
909
_register_revspec(RevisionSpec_branch)
910
_register_revspec(RevisionSpec_submit)
912
# classes in this list should have a "prefix" attribute, against which
913
# string specs are matched
914
SPEC_TYPES = symbol_versioning.deprecated_list(
915
symbol_versioning.deprecated_in((1, 12, 0)), "SPEC_TYPES", [])
828
SPEC_TYPES.append(RevisionSpec_submit)
added
removed
bzrlib/revisionspec.py
