destination: honor the sourceset argument of _destmerge
Mercurial gained a "sourceset" argument to compute the merge destination of any
changeset (the one in the 'sourceset'). This now works for the version
in topic too. The support is quite basic (because we pick only one changeset
from the sourceset) but that's a start.
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import (
bookmarks,
destutil,
error,
extensions,
util,
)
from .evolvebits import builddependencies
def _destmergebranch(orig, repo, action='merge', sourceset=None,
onheadcheck=True, destspace=None):
# XXX: take destspace into account
if sourceset is None:
p1 = repo['.']
else:
# XXX: using only the max here is flacky. That code should eventually
# be updated to take care of the whole sourceset.
p1 = repo[max(sourceset)]
top = p1.topic()
if top:
revs = repo.revs('topic(%s) - obsolete()', top)
deps, rdeps = builddependencies(repo, revs)
heads = [r for r in revs if not rdeps[r]]
if onheadcheck and p1.rev() not in heads:
raise error.Abort(_("not at topic head, update or explicit"))
# prune heads above the source
otherheads = set(heads)
pool = set([p1.rev()])
while pool:
current = pool.pop()
otherheads.discard(current)
pool.update(rdeps[current])
if not otherheads:
# nothing to do at the topic level
bhead = ngtip(repo, p1.branch(), all=True)
if not bhead:
raise error.NoMergeDestAbort(_("nothing to merge"))
elif 1 == len(bhead):
return bhead.first()
else:
msg = _("branch '%s' has %d heads "
"- please merge with an explicit rev")
hint = _("run 'hg heads .' to see heads")
raise error.ManyMergeDestAbort(msg % (p1.branch(), len(bhead)),
hint=hint)
elif len(otherheads) == 1:
return otherheads.pop()
else:
msg = _("topic '%s' has %d heads "
"- please merge with an explicit rev") % (top, len(heads))
raise error.ManyMergeDestAbort(msg)
if len(getattr(orig, 'func_defaults', ())) == 3: # version hg-3.7
return orig(repo, action, sourceset, onheadcheck)
if 3 < len(getattr(orig, 'func_defaults', ())): # version hg-3.8 and above
return orig(repo, action, sourceset, onheadcheck, destspace=destspace)
else:
return orig(repo)
def _destupdatetopic(repo, clean, check):
"""decide on an update destination from current topic"""
movemark = node = None
topic = repo.currenttopic
revs = repo.revs('.::topic("%s")' % topic)
if not revs:
return None, None, None
node = revs.last()
if bookmarks.isactivewdirparent(repo):
movemark = repo['.'].node()
return node, movemark, None
def desthistedit(orig, ui, repo):
if not (ui.config('histedit', 'defaultrev', None) is None
and repo.currenttopic):
return orig(ui, repo)
revs = repo.revs('::. and stack()')
if revs:
return revs.min()
return None
def ngtip(repo, branch, all=False):
"""tip new generation"""
## search for untopiced heads of branch
# could be heads((::branch(x) - topic()))
# but that is expensive
#
# we should write plain code instead
subquery = '''heads(
parents(
ancestor(
(head() and branch(%s)
or (topic() and branch(%s)))))
::(head() and branch(%s))
- topic())'''
if not all:
subquery = 'max(%s)' % subquery
return repo.revs(subquery, branch, branch, branch)
def modsetup(ui):
"""run a uisetup time to install all destinations wrapping"""
if util.safehasattr(destutil, '_destmergebranch'):
extensions.wrapfunction(destutil, '_destmergebranch', _destmergebranch)
try:
rebase = extensions.find('rebase')
except KeyError:
rebase = None
if (util.safehasattr(rebase, '_destrebase')
# logic not shared with merge yet < hg-3.8
and not util.safehasattr(rebase, '_definesets')):
extensions.wrapfunction(rebase, '_destrebase', _destmergebranch)
if util.safehasattr(destutil, 'destupdatesteps'):
bridx = destutil.destupdatesteps.index('branch')
destutil.destupdatesteps.insert(bridx, 'topic')
destutil.destupdatestepmap['topic'] = _destupdatetopic
if util.safehasattr(destutil, 'desthistedit'):
extensions.wrapfunction(destutil, 'desthistedit', desthistedit)