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
20
from bzrlib.lazy_import import lazy_import
21
lazy_import(globals(), """
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26
22
from bzrlib import (
122
121
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.
123
A revision specification can be an integer, in which case it is
124
assumed to be a revno (though this will translate negative values
125
into positive ones); or it can be a string, in which case it is
126
parsed for something like 'date:' or 'revid:' etc.
129
128
Revision specs are an UI element, and they have been moved out
130
129
of the branch class to leave "back-end" classes unaware of such
139
138
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
140
def __new__(cls, spec, _internal=False):
142
return object.__new__(cls, spec, _internal=_internal)
144
symbol_versioning.warn('Creating a RevisionSpec directly has'
145
' been deprecated in version 0.11. Use'
146
' RevisionSpec.from_string()'
148
DeprecationWarning, stacklevel=2)
149
return RevisionSpec.from_string(spec)
150
152
def from_string(spec):
161
163
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)
164
for spectype in SPEC_TYPES:
165
if spec.startswith(spectype.prefix):
166
trace.mutter('Returning RevisionSpec %s for %s',
167
spectype.__name__, spec)
168
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)
170
# RevisionSpec_revno is special cased, because it is the only
171
# one that directly handles plain integers
172
# TODO: This should not be special cased rather it should be
173
# a method invocation on spectype.canparse()
175
if _revno_regex is None:
176
_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
177
if _revno_regex.match(spec) is not None:
178
return RevisionSpec_revno(spec, _internal=True)
180
raise errors.NoSuchRevisionSpec(spec)
178
182
def __init__(self, spec, _internal=False):
179
183
"""Create a RevisionSpec referring to the Null revision.
291
class RevisionSpec_dwim(RevisionSpec):
292
"""Provides a DWIMish revision specifier lookup.
294
Note that this does not go in the revspec_registry because by definition
295
there is no prefix to identify it. It's solely called from
296
RevisionSpec.from_string() because the DWIMification happen when _match_on
297
is called so the string describing the revision is kept here until needed.
301
# We don't need to build the revision history ourself, that's delegated to
302
# each revspec we try.
303
wants_revision_history = False
305
def _try_spectype(self, rstype, branch):
306
rs = rstype(self.spec, _internal=True)
307
# Hit in_history to find out if it exists, or we need to try the
309
return rs.in_history(branch)
311
def _match_on(self, branch, revs):
312
"""Run the lookup and see what we can get."""
314
# First, see if it's a revno
316
if _revno_regex is None:
317
_revno_regex = re.compile(r'^(?:(\d+(\.\d+)*)|-\d+)(:.*)?$')
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
296
class RevisionSpec_revno(RevisionSpec):
338
297
"""Selects a revision using a number."""
340
299
help_txt = """Selects a revision using a number.
342
301
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.
302
Optionally a branch can be specified. The 'revno:' prefix is optional.
303
A negative number will count from the end of the branch (-1 is the
304
last revision, -2 the previous one). If the negative number is larger
305
than the branch's history, the first revision is returned.
349
308
revno:1 -> return the first revision of this branch
401
360
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)
365
revision_id_to_revno = branch.get_revision_id_to_revno_map()
366
revisions = [revision_id for revision_id, revno
367
in revision_id_to_revno.iteritems()
368
if revno == match_revno]
371
if len(revisions) != 1:
372
return branch, None, None
410
374
# there is no traditional 'revno' for dotted-decimal revnos.
411
375
# so for API compatability we return None.
412
return branch, None, revision_id
376
return branch, None, revisions[0]
414
378
last_revno, last_revision_id = branch.last_revision_info()
884
852
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", [])
855
SPEC_TYPES.append(RevisionSpec_submit)
added
removed
bzrlib/revisionspec.py
