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# discovery.py - protocol changeset discovery functions
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#
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# Copyright 2010 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import functools
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from .i18n import _
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from .node import (
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hex,
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nullid,
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short,
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)
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from . import (
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bookmarks,
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branchmap,
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error,
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phases,
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pycompat,
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scmutil,
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setdiscovery,
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treediscovery,
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util,
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)
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def findcommonincoming(repo, remote, heads=None, force=False, ancestorsof=None):
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"""Return a tuple (common, anyincoming, heads) used to identify the common
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subset of nodes between repo and remote.
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"common" is a list of (at least) the heads of the common subset.
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"anyincoming" is testable as a boolean indicating if any nodes are missing
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locally. If remote does not support getbundle, this actually is a list of
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roots of the nodes that would be incoming, to be supplied to
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changegroupsubset. No code except for pull should be relying on this fact
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any longer.
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"heads" is either the supplied heads, or else the remote's heads.
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"ancestorsof" if not None, restrict the discovery to a subset defined by
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these nodes. Changeset outside of this set won't be considered (and
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won't appears in "common")
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If you pass heads and they are all known locally, the response lists just
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these heads in "common" and in "heads".
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Please use findcommonoutgoing to compute the set of outgoing nodes to give
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extensions a good hook into outgoing.
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"""
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if not remote.capable(b'getbundle'):
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return treediscovery.findcommonincoming(repo, remote, heads, force)
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if heads:
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knownnode = repo.changelog.hasnode # no nodemap until it is filtered
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if all(knownnode(h) for h in heads):
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return (heads, False, heads)
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res = setdiscovery.findcommonheads(
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repo.ui,
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repo,
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remote,
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abortwhenunrelated=not force,
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ancestorsof=ancestorsof,
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)
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common, anyinc, srvheads = res
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return (list(common), anyinc, heads or list(srvheads))
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class outgoing(object):
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'''Represents the set of nodes present in a local repo but not in a
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(possibly) remote one.
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Members:
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missing is a list of all nodes present in local but not in remote.
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common is a list of all nodes shared between the two repos.
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excluded is the list of missing changeset that shouldn't be sent remotely.
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missingheads is the list of heads of missing.
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commonheads is the list of heads of common.
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The sets are computed on demand from the heads, unless provided upfront
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by discovery.'''
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def __init__(
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self, repo, commonheads=None, missingheads=None, missingroots=None
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):
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# at least one of them must not be set
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assert None in (commonheads, missingroots)
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cl = repo.changelog
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if missingheads is None:
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missingheads = cl.heads()
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if missingroots:
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discbases = []
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for n in missingroots:
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discbases.extend([p for p in cl.parents(n) if p != nullid])
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# TODO remove call to nodesbetween.
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# TODO populate attributes on outgoing instance instead of setting
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# discbases.
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csets, roots, heads = cl.nodesbetween(missingroots, missingheads)
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included = set(csets)
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missingheads = heads
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commonheads = [n for n in discbases if n not in included]
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elif not commonheads:
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commonheads = [nullid]
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self.commonheads = commonheads
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self.missingheads = missingheads
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self._revlog = cl
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self._common = None
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self._missing = None
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self.excluded = []
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def _computecommonmissing(self):
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sets = self._revlog.findcommonmissing(
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self.commonheads, self.missingheads
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)
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self._common, self._missing = sets
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@util.propertycache
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def common(self):
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if self._common is None:
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self._computecommonmissing()
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return self._common
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@util.propertycache
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def missing(self):
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if self._missing is None:
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self._computecommonmissing()
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return self._missing
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def findcommonoutgoing(
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repo, other, onlyheads=None, force=False, commoninc=None, portable=False
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):
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'''Return an outgoing instance to identify the nodes present in repo but
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not in other.
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If onlyheads is given, only nodes ancestral to nodes in onlyheads
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(inclusive) are included. If you already know the local repo's heads,
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passing them in onlyheads is faster than letting them be recomputed here.
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If commoninc is given, it must be the result of a prior call to
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findcommonincoming(repo, other, force) to avoid recomputing it here.
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If portable is given, compute more conservative common and missingheads,
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to make bundles created from the instance more portable.'''
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# declare an empty outgoing object to be filled later
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og = outgoing(repo, None, None)
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# get common set if not provided
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if commoninc is None:
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commoninc = findcommonincoming(
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repo, other, force=force, ancestorsof=onlyheads
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)
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og.commonheads, _any, _hds = commoninc
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# compute outgoing
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mayexclude = repo._phasecache.phaseroots[phases.secret] or repo.obsstore
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if not mayexclude:
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og.missingheads = onlyheads or repo.heads()
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elif onlyheads is None:
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# use visible heads as it should be cached
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og.missingheads = repo.filtered(b"served").heads()
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og.excluded = [ctx.node() for ctx in repo.set(b'secret() or extinct()')]
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else:
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# compute common, missing and exclude secret stuff
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sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads)
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og._common, allmissing = sets
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og._missing = missing = []
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og.excluded = excluded = []
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for node in allmissing:
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ctx = repo[node]
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if ctx.phase() >= phases.secret or ctx.extinct():
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excluded.append(node)
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else:
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missing.append(node)
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if len(missing) == len(allmissing):
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missingheads = onlyheads
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else: # update missing heads
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missingheads = phases.newheads(repo, onlyheads, excluded)
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og.missingheads = missingheads
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if portable:
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# recompute common and missingheads as if -r<rev> had been given for
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# each head of missing, and --base <rev> for each head of the proper
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# ancestors of missing
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og._computecommonmissing()
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cl = repo.changelog
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missingrevs = set(cl.rev(n) for n in og._missing)
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og._common = set(cl.ancestors(missingrevs)) - missingrevs
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commonheads = set(og.commonheads)
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og.missingheads = [h for h in og.missingheads if h not in commonheads]
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return og
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def _headssummary(pushop):
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"""compute a summary of branch and heads status before and after push
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return {'branch': ([remoteheads], [newheads],
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[unsyncedheads], [discardedheads])} mapping
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- branch: the branch name,
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- remoteheads: the list of remote heads known locally
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None if the branch is new,
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- newheads: the new remote heads (known locally) with outgoing pushed,
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- unsyncedheads: the list of remote heads unknown locally,
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- discardedheads: the list of heads made obsolete by the push.
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"""
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repo = pushop.repo.unfiltered()
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remote = pushop.remote
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outgoing = pushop.outgoing
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cl = repo.changelog
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headssum = {}
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missingctx = set()
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# A. Create set of branches involved in the push.
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branches = set()
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for n in outgoing.missing:
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ctx = repo[n]
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missingctx.add(ctx)
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branches.add(ctx.branch())
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with remote.commandexecutor() as e:
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remotemap = e.callcommand(b'branchmap', {}).result()
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knownnode = cl.hasnode # do not use nodemap until it is filtered
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# A. register remote heads of branches which are in outgoing set
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for branch, heads in pycompat.iteritems(remotemap):
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# don't add head info about branches which we don't have locally
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if branch not in branches:
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continue
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known = []
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unsynced = []
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for h in heads:
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if knownnode(h):
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known.append(h)
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else:
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unsynced.append(h)
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headssum[branch] = (known, list(known), unsynced)
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# B. add new branch data
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for branch in branches:
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if branch not in headssum:
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headssum[branch] = (None, [], [])
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# C. Update newmap with outgoing changes.
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# This will possibly add new heads and remove existing ones.
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newmap = branchmap.remotebranchcache(
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(branch, heads[1])
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for branch, heads in pycompat.iteritems(headssum)
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if heads[0] is not None
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)
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newmap.update(repo, (ctx.rev() for ctx in missingctx))
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for branch, newheads in pycompat.iteritems(newmap):
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headssum[branch][1][:] = newheads
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for branch, items in pycompat.iteritems(headssum):
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for l in items:
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if l is not None:
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l.sort()
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headssum[branch] = items + ([],)
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# If there are no obsstore, no post processing are needed.
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if repo.obsstore:
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torev = repo.changelog.rev
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futureheads = set(torev(h) for h in outgoing.missingheads)
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futureheads |= set(torev(h) for h in outgoing.commonheads)
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allfuturecommon = repo.changelog.ancestors(futureheads, inclusive=True)
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for branch, heads in sorted(pycompat.iteritems(headssum)):
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remoteheads, newheads, unsyncedheads, placeholder = heads
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result = _postprocessobsolete(pushop, allfuturecommon, newheads)
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headssum[branch] = (
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remoteheads,
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sorted(result[0]),
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unsyncedheads,
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sorted(result[1]),
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)
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return headssum
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def _oldheadssummary(repo, remoteheads, outgoing, inc=False):
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"""Compute branchmapsummary for repo without branchmap support"""
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# 1-4b. old servers: Check for new topological heads.
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# Construct {old,new}map with branch = None (topological branch).
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# (code based on update)
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knownnode = repo.changelog.hasnode # no nodemap until it is filtered
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oldheads = sorted(h for h in remoteheads if knownnode(h))
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# all nodes in outgoing.missing are children of either:
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# - an element of oldheads
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# - another element of outgoing.missing
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# - nullrev
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# This explains why the new head are very simple to compute.
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r = repo.set(b'heads(%ln + %ln)', oldheads, outgoing.missing)
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newheads = sorted(c.node() for c in r)
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# set some unsynced head to issue the "unsynced changes" warning
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if inc:
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unsynced = [None]
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else:
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unsynced = []
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return {None: (oldheads, newheads, unsynced, [])}
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def _nowarnheads(pushop):
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# Compute newly pushed bookmarks. We don't warn about bookmarked heads.
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repo = pushop.repo.unfiltered()
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remote = pushop.remote
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localbookmarks = repo._bookmarks
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with remote.commandexecutor() as e:
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remotebookmarks = e.callcommand(
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b'listkeys', {b'namespace': b'bookmarks',}
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).result()
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bookmarkedheads = set()
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# internal config: bookmarks.pushing
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newbookmarks = [
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localbookmarks.expandname(b)
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for b in pushop.ui.configlist(b'bookmarks', b'pushing')
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]
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for bm in localbookmarks:
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rnode = remotebookmarks.get(bm)
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if rnode and rnode in repo:
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lctx, rctx = repo[localbookmarks[bm]], repo[rnode]
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if bookmarks.validdest(repo, rctx, lctx):
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bookmarkedheads.add(lctx.node())
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else:
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if bm in newbookmarks and bm not in remotebookmarks:
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bookmarkedheads.add(localbookmarks[bm])
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return bookmarkedheads
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def checkheads(pushop):
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"""Check that a push won't add any outgoing head
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raise Abort error and display ui message as needed.
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"""
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repo = pushop.repo.unfiltered()
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remote = pushop.remote
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outgoing = pushop.outgoing
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remoteheads = pushop.remoteheads
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newbranch = pushop.newbranch
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inc = bool(pushop.incoming)
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# Check for each named branch if we're creating new remote heads.
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# To be a remote head after push, node must be either:
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# - unknown locally
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# - a local outgoing head descended from update
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# - a remote head that's known locally and not
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# ancestral to an outgoing head
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if remoteheads == [nullid]:
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# remote is empty, nothing to check.
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return
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if remote.capable(b'branchmap'):
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headssum = _headssummary(pushop)
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else:
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headssum = _oldheadssummary(repo, remoteheads, outgoing, inc)
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pushop.pushbranchmap = headssum
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newbranches = [
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branch
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for branch, heads in pycompat.iteritems(headssum)
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if heads[0] is None
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]
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# 1. Check for new branches on the remote.
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if newbranches and not newbranch: # new branch requires --new-branch
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branchnames = b', '.join(sorted(newbranches))
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# Calculate how many of the new branches are closed branches
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closedbranches = set()
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for tag, heads, tip, isclosed in repo.branchmap().iterbranches():
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if isclosed:
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closedbranches.add(tag)
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closedbranches = closedbranches & set(newbranches)
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if closedbranches:
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errmsg = _(b"push creates new remote branches: %s (%d closed)!") % (
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branchnames,
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len(closedbranches),
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)
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else:
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errmsg = _(b"push creates new remote branches: %s!") % branchnames
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hint = _(b"use 'hg push --new-branch' to create new remote branches")
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raise error.Abort(errmsg, hint=hint)
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# 2. Find heads that we need not warn about
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nowarnheads = _nowarnheads(pushop)
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# 3. Check for new heads.
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# If there are more heads after the push than before, a suitable
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# error message, depending on unsynced status, is displayed.
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errormsg = None
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for branch, heads in sorted(pycompat.iteritems(headssum)):
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remoteheads, newheads, unsyncedheads, discardedheads = heads
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# add unsynced data
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if remoteheads is None:
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oldhs = set()
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else:
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oldhs = set(remoteheads)
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oldhs.update(unsyncedheads)
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dhs = None # delta heads, the new heads on branch
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newhs = set(newheads)
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newhs.update(unsyncedheads)
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if unsyncedheads:
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if None in unsyncedheads:
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# old remote, no heads data
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heads = None
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else:
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heads = scmutil.nodesummaries(repo, unsyncedheads)
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if heads is None:
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repo.ui.status(
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_(b"remote has heads that are not known locally\n")
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)
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elif branch is None:
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repo.ui.status(
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_(b"remote has heads that are not known locally: %s\n")
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% heads
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)
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else:
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repo.ui.status(
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_(
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b"remote has heads on branch '%s' that are "
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b"not known locally: %s\n"
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)
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% (branch, heads)
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)
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if remoteheads is None:
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if len(newhs) > 1:
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dhs = list(newhs)
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if errormsg is None:
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errormsg = (
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_(b"push creates new branch '%s' with multiple heads")
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% branch
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|
|
)
|
|
|
hint = _(
|
|
|
b"merge or"
|
|
|
b" see 'hg help push' for details about"
|
|
|
b" pushing new heads"
|
|
|
)
|
|
|
elif len(newhs) > len(oldhs):
|
|
|
# remove bookmarked or existing remote heads from the new heads list
|
|
|
dhs = sorted(newhs - nowarnheads - oldhs)
|
|
|
if dhs:
|
|
|
if errormsg is None:
|
|
|
if branch not in (b'default', None):
|
|
|
errormsg = _(
|
|
|
b"push creates new remote head %s on branch '%s'!"
|
|
|
) % (short(dhs[0]), branch)
|
|
|
elif repo[dhs[0]].bookmarks():
|
|
|
errormsg = _(
|
|
|
b"push creates new remote head %s "
|
|
|
b"with bookmark '%s'!"
|
|
|
) % (short(dhs[0]), repo[dhs[0]].bookmarks()[0])
|
|
|
else:
|
|
|
errormsg = _(b"push creates new remote head %s!") % short(
|
|
|
dhs[0]
|
|
|
)
|
|
|
if unsyncedheads:
|
|
|
hint = _(
|
|
|
b"pull and merge or"
|
|
|
b" see 'hg help push' for details about"
|
|
|
b" pushing new heads"
|
|
|
)
|
|
|
else:
|
|
|
hint = _(
|
|
|
b"merge or"
|
|
|
b" see 'hg help push' for details about"
|
|
|
b" pushing new heads"
|
|
|
)
|
|
|
if branch is None:
|
|
|
repo.ui.note(_(b"new remote heads:\n"))
|
|
|
else:
|
|
|
repo.ui.note(_(b"new remote heads on branch '%s':\n") % branch)
|
|
|
for h in dhs:
|
|
|
repo.ui.note(b" %s\n" % short(h))
|
|
|
if errormsg:
|
|
|
raise error.Abort(errormsg, hint=hint)
|
|
|
|
|
|
|
|
|
def _postprocessobsolete(pushop, futurecommon, candidate_newhs):
|
|
|
"""post process the list of new heads with obsolescence information
|
|
|
|
|
|
Exists as a sub-function to contain the complexity and allow extensions to
|
|
|
experiment with smarter logic.
|
|
|
|
|
|
Returns (newheads, discarded_heads) tuple
|
|
|
"""
|
|
|
# known issue
|
|
|
#
|
|
|
# * We "silently" skip processing on all changeset unknown locally
|
|
|
#
|
|
|
# * if <nh> is public on the remote, it won't be affected by obsolete
|
|
|
# marker and a new is created
|
|
|
|
|
|
# define various utilities and containers
|
|
|
repo = pushop.repo
|
|
|
unfi = repo.unfiltered()
|
|
|
tonode = unfi.changelog.node
|
|
|
torev = unfi.changelog.nodemap.get
|
|
|
public = phases.public
|
|
|
getphase = unfi._phasecache.phase
|
|
|
ispublic = lambda r: getphase(unfi, r) == public
|
|
|
ispushed = lambda n: torev(n) in futurecommon
|
|
|
hasoutmarker = functools.partial(pushingmarkerfor, unfi.obsstore, ispushed)
|
|
|
successorsmarkers = unfi.obsstore.successors
|
|
|
newhs = set() # final set of new heads
|
|
|
discarded = set() # new head of fully replaced branch
|
|
|
|
|
|
localcandidate = set() # candidate heads known locally
|
|
|
unknownheads = set() # candidate heads unknown locally
|
|
|
for h in candidate_newhs:
|
|
|
if h in unfi:
|
|
|
localcandidate.add(h)
|
|
|
else:
|
|
|
if successorsmarkers.get(h) is not None:
|
|
|
msg = (
|
|
|
b'checkheads: remote head unknown locally has'
|
|
|
b' local marker: %s\n'
|
|
|
)
|
|
|
repo.ui.debug(msg % hex(h))
|
|
|
unknownheads.add(h)
|
|
|
|
|
|
# fast path the simple case
|
|
|
if len(localcandidate) == 1:
|
|
|
return unknownheads | set(candidate_newhs), set()
|
|
|
|
|
|
# actually process branch replacement
|
|
|
while localcandidate:
|
|
|
nh = localcandidate.pop()
|
|
|
# run this check early to skip the evaluation of the whole branch
|
|
|
if torev(nh) in futurecommon or ispublic(torev(nh)):
|
|
|
newhs.add(nh)
|
|
|
continue
|
|
|
|
|
|
# Get all revs/nodes on the branch exclusive to this head
|
|
|
# (already filtered heads are "ignored"))
|
|
|
branchrevs = unfi.revs(
|
|
|
b'only(%n, (%ln+%ln))', nh, localcandidate, newhs
|
|
|
)
|
|
|
branchnodes = [tonode(r) for r in branchrevs]
|
|
|
|
|
|
# The branch won't be hidden on the remote if
|
|
|
# * any part of it is public,
|
|
|
# * any part of it is considered part of the result by previous logic,
|
|
|
# * if we have no markers to push to obsolete it.
|
|
|
if (
|
|
|
any(ispublic(r) for r in branchrevs)
|
|
|
or any(torev(n) in futurecommon for n in branchnodes)
|
|
|
or any(not hasoutmarker(n) for n in branchnodes)
|
|
|
):
|
|
|
newhs.add(nh)
|
|
|
else:
|
|
|
# note: there is a corner case if there is a merge in the branch.
|
|
|
# we might end up with -more- heads. However, these heads are not
|
|
|
# "added" by the push, but more by the "removal" on the remote so I
|
|
|
# think is a okay to ignore them,
|
|
|
discarded.add(nh)
|
|
|
newhs |= unknownheads
|
|
|
return newhs, discarded
|
|
|
|
|
|
|
|
|
def pushingmarkerfor(obsstore, ispushed, node):
|
|
|
"""true if some markers are to be pushed for node
|
|
|
|
|
|
We cannot just look in to the pushed obsmarkers from the pushop because
|
|
|
discovery might have filtered relevant markers. In addition listing all
|
|
|
markers relevant to all changesets in the pushed set would be too expensive
|
|
|
(O(len(repo)))
|
|
|
|
|
|
(note: There are cache opportunity in this function. but it would requires
|
|
|
a two dimensional stack.)
|
|
|
"""
|
|
|
successorsmarkers = obsstore.successors
|
|
|
stack = [node]
|
|
|
seen = set(stack)
|
|
|
while stack:
|
|
|
current = stack.pop()
|
|
|
if ispushed(current):
|
|
|
return True
|
|
|
markers = successorsmarkers.get(current, ())
|
|
|
# markers fields = ('prec', 'succs', 'flag', 'meta', 'date', 'parents')
|
|
|
for m in markers:
|
|
|
nexts = m[1] # successors
|
|
|
if not nexts: # this is a prune marker
|
|
|
nexts = m[5] or () # parents
|
|
|
for n in nexts:
|
|
|
if n not in seen:
|
|
|
seen.add(n)
|
|
|
stack.append(n)
|
|
|
return False
|
|
|
|
