stablesort: simplify processing of non-merge changesets
As long as a changeset as only one parent, the next element in the sort (starting
from the head) has to be that parent. We detect and take advantage of that
shortcut in the non-merge case.
from __future__ import absolute_import
from mercurial import (
registrar,
revset,
util,
)
from . import (
constants,
destination,
stack,
)
try:
mkmatcher = revset._stringmatcher
except AttributeError:
mkmatcher = util.stringmatcher
revsetpredicate = registrar.revsetpredicate()
@revsetpredicate('topic([topic])')
def topicset(repo, subset, x):
"""Specified topic or all changes with any topic specified.
If `topic` starts with `re:` the remainder of the name is treated
as a regular expression.
TODO: make `topic(revset)` work the same as `branch(revset)`.
"""
args = revset.getargs(x, 0, 1, 'topic takes one or no arguments')
if args:
# match a specific topic
topic = revset.getstring(args[0], 'topic() argument must be a string')
if topic == '.':
topic = repo['.'].extra().get('topic', '')
_kind, _pattern, matcher = mkmatcher(topic)
else:
matcher = lambda t: bool(t)
mutable = revset._notpublic(repo, revset.fullreposet(repo), ())
rawchange = repo.changelog.changelogrevision
key = constants.extrakey
def matchtopic(r):
topic = rawchange(r).extra.get(key)
if topic is None:
return False
return matcher(topic)
return (subset & mutable).filter(matchtopic)
@revsetpredicate('ngtip([branch])')
def ngtipset(repo, subset, x):
"""The untopiced tip.
Name is horrible so that people change it.
"""
args = revset.getargs(x, 1, 1, 'topic takes one')
# match a specific topic
branch = revset.getstring(args[0], 'ngtip() argument must be a string')
if branch == '.':
branch = repo['.'].branch()
return subset & revset.baseset(destination.ngtip(repo, branch))
@revsetpredicate('stack()')
def stackset(repo, subset, x):
"""All relevant changes in the current topic,
This is roughly equivalent to 'topic(.) - obsolete' with a sorting moving
unstable changeset after there future parent (as if evolve where already
run)."""
err = 'stack() takes no argument, it works on current topic'
revset.getargs(x, 0, 0, err)
topic = None
branch = None
if repo.currenttopic:
topic = repo.currenttopic
else:
branch = repo[None].branch()
return revset.baseset(stack.stack(repo, branch=branch, topic=topic)[1:]) & subset