|
|
# discovery.py - protocol changeset discovery functions
|
|
|
#
|
|
|
# Copyright 2010 Matt Mackall <mpm@selenic.com>
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from node import nullid, short
|
|
|
from i18n import _
|
|
|
import util, setdiscovery, treediscovery, phases
|
|
|
|
|
|
def findcommonincoming(repo, remote, heads=None, force=False):
|
|
|
"""Return a tuple (common, anyincoming, heads) used to identify the common
|
|
|
subset of nodes between repo and remote.
|
|
|
|
|
|
"common" is a list of (at least) the heads of the common subset.
|
|
|
"anyincoming" is testable as a boolean indicating if any nodes are missing
|
|
|
locally. If remote does not support getbundle, this actually is a list of
|
|
|
roots of the nodes that would be incoming, to be supplied to
|
|
|
changegroupsubset. No code except for pull should be relying on this fact
|
|
|
any longer.
|
|
|
"heads" is either the supplied heads, or else the remote's heads.
|
|
|
|
|
|
If you pass heads and they are all known locally, the reponse lists justs
|
|
|
these heads in "common" and in "heads".
|
|
|
|
|
|
Please use findcommonoutgoing to compute the set of outgoing nodes to give
|
|
|
extensions a good hook into outgoing.
|
|
|
"""
|
|
|
|
|
|
if not remote.capable('getbundle'):
|
|
|
return treediscovery.findcommonincoming(repo, remote, heads, force)
|
|
|
|
|
|
if heads:
|
|
|
allknown = True
|
|
|
nm = repo.changelog.nodemap
|
|
|
for h in heads:
|
|
|
if nm.get(h) is None:
|
|
|
allknown = False
|
|
|
break
|
|
|
if allknown:
|
|
|
return (heads, False, heads)
|
|
|
|
|
|
res = setdiscovery.findcommonheads(repo.ui, repo, remote,
|
|
|
abortwhenunrelated=not force)
|
|
|
common, anyinc, srvheads = res
|
|
|
return (list(common), anyinc, heads or list(srvheads))
|
|
|
|
|
|
class outgoing(object):
|
|
|
'''Represents the set of nodes present in a local repo but not in a
|
|
|
(possibly) remote one.
|
|
|
|
|
|
Members:
|
|
|
|
|
|
missing is a list of all nodes present in local but not in remote.
|
|
|
common is a list of all nodes shared between the two repos.
|
|
|
excluded is the list of missing changeset that shouldn't be sent remotely.
|
|
|
missingheads is the list of heads of missing.
|
|
|
commonheads is the list of heads of common.
|
|
|
|
|
|
The sets are computed on demand from the heads, unless provided upfront
|
|
|
by discovery.'''
|
|
|
|
|
|
def __init__(self, revlog, commonheads, missingheads):
|
|
|
self.commonheads = commonheads
|
|
|
self.missingheads = missingheads
|
|
|
self._revlog = revlog
|
|
|
self._common = None
|
|
|
self._missing = None
|
|
|
self.excluded = []
|
|
|
|
|
|
def _computecommonmissing(self):
|
|
|
sets = self._revlog.findcommonmissing(self.commonheads,
|
|
|
self.missingheads)
|
|
|
self._common, self._missing = sets
|
|
|
|
|
|
@util.propertycache
|
|
|
def common(self):
|
|
|
if self._common is None:
|
|
|
self._computecommonmissing()
|
|
|
return self._common
|
|
|
|
|
|
@util.propertycache
|
|
|
def missing(self):
|
|
|
if self._missing is None:
|
|
|
self._computecommonmissing()
|
|
|
return self._missing
|
|
|
|
|
|
def findcommonoutgoing(repo, other, onlyheads=None, force=False, commoninc=None):
|
|
|
'''Return an outgoing instance to identify the nodes present in repo but
|
|
|
not in other.
|
|
|
|
|
|
If onlyheads is given, only nodes ancestral to nodes in onlyheads (inclusive)
|
|
|
are included. If you already know the local repo's heads, passing them in
|
|
|
onlyheads is faster than letting them be recomputed here.
|
|
|
|
|
|
If commoninc is given, it must the the result of a prior call to
|
|
|
findcommonincoming(repo, other, force) to avoid recomputing it here.'''
|
|
|
# declare an empty outgoing object to be filled later
|
|
|
og = outgoing(repo.changelog, None, None)
|
|
|
|
|
|
# get common set if not provided
|
|
|
if commoninc is None:
|
|
|
commoninc = findcommonincoming(repo, other, force=force)
|
|
|
og.commonheads, _any, _hds = commoninc
|
|
|
|
|
|
# compute outgoing
|
|
|
if not repo._phaseroots[phases.secret]:
|
|
|
og.missingheads = onlyheads or repo.heads()
|
|
|
elif onlyheads is None:
|
|
|
# use visible heads as it should be cached
|
|
|
og.missingheads = phases.visibleheads(repo)
|
|
|
og.excluded = [ctx.node() for ctx in repo.set('secret()')]
|
|
|
else:
|
|
|
# compute common, missing and exclude secret stuff
|
|
|
sets = repo.changelog.findcommonmissing(og.commonheads, onlyheads)
|
|
|
og._common, allmissing = sets
|
|
|
og._missing = missing = []
|
|
|
og.excluded = excluded = []
|
|
|
for node in allmissing:
|
|
|
if repo[node].phase() >= phases.secret:
|
|
|
excluded.append(node)
|
|
|
else:
|
|
|
missing.append(node)
|
|
|
if excluded:
|
|
|
# update missing heads
|
|
|
rset = repo.set('heads(%ln)', missing)
|
|
|
missingheads = [ctx.node() for ctx in rset]
|
|
|
else:
|
|
|
missingheads = onlyheads
|
|
|
og.missingheads = missingheads
|
|
|
|
|
|
return og
|
|
|
|
|
|
def checkheads(repo, remote, outgoing, remoteheads, newbranch=False):
|
|
|
"""Check that a push won't add any outgoing head
|
|
|
|
|
|
raise Abort error and display ui message as needed.
|
|
|
"""
|
|
|
if remoteheads == [nullid]:
|
|
|
# remote is empty, nothing to check.
|
|
|
return
|
|
|
|
|
|
cl = repo.changelog
|
|
|
if remote.capable('branchmap'):
|
|
|
# Check for each named branch if we're creating new remote heads.
|
|
|
# To be a remote head after push, node must be either:
|
|
|
# - unknown locally
|
|
|
# - a local outgoing head descended from update
|
|
|
# - a remote head that's known locally and not
|
|
|
# ancestral to an outgoing head
|
|
|
|
|
|
# 1. Create set of branches involved in the push.
|
|
|
branches = set(repo[n].branch() for n in outgoing.missing)
|
|
|
|
|
|
# 2. Check for new branches on the remote.
|
|
|
remotemap = remote.branchmap()
|
|
|
newbranches = branches - set(remotemap)
|
|
|
if newbranches and not newbranch: # new branch requires --new-branch
|
|
|
branchnames = ', '.join(sorted(newbranches))
|
|
|
raise util.Abort(_("push creates new remote branches: %s!")
|
|
|
% branchnames,
|
|
|
hint=_("use 'hg push --new-branch' to create"
|
|
|
" new remote branches"))
|
|
|
branches.difference_update(newbranches)
|
|
|
|
|
|
# 3. Construct the initial oldmap and newmap dicts.
|
|
|
# They contain information about the remote heads before and
|
|
|
# after the push, respectively.
|
|
|
# Heads not found locally are not included in either dict,
|
|
|
# since they won't be affected by the push.
|
|
|
# unsynced contains all branches with incoming changesets.
|
|
|
oldmap = {}
|
|
|
newmap = {}
|
|
|
unsynced = set()
|
|
|
for branch in branches:
|
|
|
remotebrheads = remotemap[branch]
|
|
|
prunedbrheads = [h for h in remotebrheads if h in cl.nodemap]
|
|
|
oldmap[branch] = prunedbrheads
|
|
|
newmap[branch] = list(prunedbrheads)
|
|
|
if len(remotebrheads) > len(prunedbrheads):
|
|
|
unsynced.add(branch)
|
|
|
|
|
|
# 4. Update newmap with outgoing changes.
|
|
|
# This will possibly add new heads and remove existing ones.
|
|
|
ctxgen = (repo[n] for n in outgoing.missing)
|
|
|
repo._updatebranchcache(newmap, ctxgen)
|
|
|
|
|
|
else:
|
|
|
# 1-4b. old servers: Check for new topological heads.
|
|
|
# Construct {old,new}map with branch = None (topological branch).
|
|
|
# (code based on _updatebranchcache)
|
|
|
oldheads = set(h for h in remoteheads if h in cl.nodemap)
|
|
|
newheads = oldheads.union(outg)
|
|
|
if len(newheads) > 1:
|
|
|
for latest in reversed(outg):
|
|
|
if latest not in newheads:
|
|
|
continue
|
|
|
minhrev = min(cl.rev(h) for h in newheads)
|
|
|
reachable = cl.reachable(latest, cl.node(minhrev))
|
|
|
reachable.remove(latest)
|
|
|
newheads.difference_update(reachable)
|
|
|
branches = set([None])
|
|
|
newmap = {None: newheads}
|
|
|
oldmap = {None: oldheads}
|
|
|
unsynced = inc and branches or set()
|
|
|
|
|
|
# 5. Check for new heads.
|
|
|
# If there are more heads after the push than before, a suitable
|
|
|
# error message, depending on unsynced status, is displayed.
|
|
|
error = None
|
|
|
for branch in branches:
|
|
|
newhs = set(newmap[branch])
|
|
|
oldhs = set(oldmap[branch])
|
|
|
if len(newhs) > len(oldhs):
|
|
|
dhs = list(newhs - oldhs)
|
|
|
if error is None:
|
|
|
if branch not in ('default', None):
|
|
|
error = _("push creates new remote head %s "
|
|
|
"on branch '%s'!") % (short(dhs[0]), branch)
|
|
|
else:
|
|
|
error = _("push creates new remote head %s!"
|
|
|
) % short(dhs[0])
|
|
|
if branch in unsynced:
|
|
|
hint = _("you should pull and merge or "
|
|
|
"use push -f to force")
|
|
|
else:
|
|
|
hint = _("did you forget to merge? "
|
|
|
"use push -f to force")
|
|
|
if branch is not None:
|
|
|
repo.ui.note(_("new remote heads on branch '%s'\n") % branch)
|
|
|
for h in dhs:
|
|
|
repo.ui.note(_("new remote head %s\n") % short(h))
|
|
|
if error:
|
|
|
raise util.Abort(error, hint=hint)
|
|
|
|
|
|
# 6. Check for unsynced changes on involved branches.
|
|
|
if unsynced:
|
|
|
repo.ui.warn(_("note: unsynced remote changes!\n"))
|
|
|
|