124
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help_txt = """A parsed revision specification.
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.
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.
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Revision specs are an UI element, and they have been moved out
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of the branch class to leave "back-end" classes unaware of such
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wants_revision_history = True
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dwim_catchable_exceptions = (errors.InvalidRevisionSpec,)
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"""Exceptions that RevisionSpec_dwim._match_on will catch.
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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
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150
def from_string(spec):
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171
trace.mutter('Returning RevisionSpec %s for %s',
166
172
spectype.__name__, spec)
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return spectype(spec, _internal=True)
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# RevisionSpec_revno is special cased, because it is the only
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# one that directly handles plain integers
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# TODO: This should not be special cased rather it should be
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# a method invocation on spectype.canparse()
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if _revno_regex is None:
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_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
175
if _revno_regex.match(spec) is not None:
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return RevisionSpec_revno(spec, _internal=True)
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raise errors.NoSuchRevisionSpec(spec)
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# Otherwise treat it as a DWIM, build the RevisionSpec object and
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# wait for _match_on to be called.
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return RevisionSpec_dwim(spec, _internal=True)
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def __init__(self, spec, _internal=False):
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"""Create a RevisionSpec referring to the Null revision.
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class RevisionSpec_dwim(RevisionSpec):
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"""Provides a DWIMish revision specifier lookup.
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Note that this does not go in the revspec_registry because by definition
295
there is no prefix to identify it. It's solely called from
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RevisionSpec.from_string() because the DWIMification happen when _match_on
297
is called so the string describing the revision is kept here until needed.
301
# We don't need to build the revision history ourself, that's delegated to
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# each revspec we try.
303
wants_revision_history = False
305
def _try_spectype(self, rstype, branch):
306
rs = rstype(self.spec, _internal=True)
307
# Hit in_history to find out if it exists, or we need to try the
309
return rs.in_history(branch)
311
def _match_on(self, branch, revs):
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"""Run the lookup and see what we can get."""
314
# First, see if it's a revno
316
if _revno_regex is None:
317
_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
318
if _revno_regex.match(self.spec) is not None:
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return self._try_spectype(RevisionSpec_revno, branch)
321
except RevisionSpec_revno.dwim_catchable_exceptions:
324
# Next see what has been registered
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for rs_class in dwim_revspecs:
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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
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# first of last exception raised during the DWIM tries as none seems
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raise errors.InvalidRevisionSpec(self.spec, branch)
293
337
class RevisionSpec_revno(RevisionSpec):
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"""Selects a revision using a number."""
296
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help_txt = """Selects a revision using a number.
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342
Use an integer to specify a revision in the history of the branch.
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Optionally a branch can be specified. The 'revno:' prefix is optional.
300
A negative number will count from the end of the branch (-1 is the
301
last revision, -2 the previous one). If the negative number is larger
302
than the branch's history, the first revision is returned.
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.
305
349
revno:1 -> return the first revision of this branch
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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?
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RevisionSpec_date, # Perhaps a date?
894
RevisionSpec_branch, # OK, last try, maybe it's a branch
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revspec_registry = registry.Registry()
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def _register_revspec(revspec):
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revspec_registry.register(revspec.prefix, revspec)
852
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_register_revspec(RevisionSpec_branch)
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_register_revspec(RevisionSpec_submit)
912
# classes in this list should have a "prefix" attribute, against which
913
# string specs are matched
855
914
SPEC_TYPES = symbol_versioning.deprecated_list(
856
915
symbol_versioning.deprecated_in((1, 12, 0)), "SPEC_TYPES", [])
added
removed
bzrlib/revisionspec.py
