|
|
# 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 __future__ import absolute_import
|
|
|
|
|
|
import functools
|
|
|
|
|
|
from .i18n import _
|
|
|
from .node import (
|
|
|
hex,
|
|
|
nullid,
|
|
|
short,
|
|
|
)
|
|
|
|
|
|
from . import (
|
|
|
bookmarks,
|
|
|
branchmap,
|
|
|
error,
|
|
|
phases,
|
|
|
scmutil,
|
|
|
setdiscovery,
|
|
|
treediscovery,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
def findcommonincoming(repo, remote, heads=None, force=False, ancestorsof=None):
|
|
|
"""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.
|
|
|
"ancestorsof" if not None, restrict the discovery to a subset defined by
|
|
|
these nodes. Changeset outside of this set won't be considered (and
|
|
|
won't appears in "common")
|
|
|
|
|
|
If you pass heads and they are all known locally, the response lists just
|
|
|
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
|
|
|
knownnode = repo.changelog.hasnode # no nodemap until it is filtered
|
|
|
for h in heads:
|
|
|
if not knownnode(h):
|
|
|
allknown = False
|
|
|
break
|
|
|
if allknown:
|
|
|
return (heads, False, heads)
|
|
|
|
|
|
res = setdiscovery.findcommonheads(repo.ui, repo, remote,
|
|
|
abortwhenunrelated=not force,
|
|
|
ancestorsof=ancestorsof)
|
|
|
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, repo, commonheads=None, missingheads=None,
|
|
|
missingroots=None):
|
|
|
# at least one of them must not be set
|
|
|
assert None in (commonheads, missingroots)
|
|
|
cl = repo.changelog
|
|
|
if missingheads is None:
|
|
|
missingheads = cl.heads()
|
|
|
if missingroots:
|
|
|
discbases = []
|
|
|
for n in missingroots:
|
|
|
discbases.extend([p for p in cl.parents(n) if p != nullid])
|
|
|
# TODO remove call to nodesbetween.
|
|
|
# TODO populate attributes on outgoing instance instead of setting
|
|
|
# discbases.
|
|
|
csets, roots, heads = cl.nodesbetween(missingroots, missingheads)
|
|
|
included = set(csets)
|
|
|
missingheads = heads
|
|
|
commonheads = [n for n in discbases if n not in included]
|
|
|
elif not commonheads:
|
|
|
commonheads = [nullid]
|
|
|
self.commonheads = commonheads
|
|
|
self.missingheads = missingheads
|
|
|
self._revlog = cl
|
|
|
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, portable=False):
|
|
|
'''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 be the result of a prior call to
|
|
|
findcommonincoming(repo, other, force) to avoid recomputing it here.
|
|
|
|
|
|
If portable is given, compute more conservative common and missingheads,
|
|
|
to make bundles created from the instance more portable.'''
|
|
|
# declare an empty outgoing object to be filled later
|
|
|
og = outgoing(repo, None, None)
|
|
|
|
|
|
# get common set if not provided
|
|
|
if commoninc is None:
|
|
|
commoninc = findcommonincoming(repo, other, force=force,
|
|
|
ancestorsof=onlyheads)
|
|
|
og.commonheads, _any, _hds = commoninc
|
|
|
|
|
|
# compute outgoing
|
|
|
mayexclude = (repo._phasecache.phaseroots[phases.secret] or repo.obsstore)
|
|
|
if not mayexclude:
|
|
|
og.missingheads = onlyheads or repo.heads()
|
|
|
elif onlyheads is None:
|
|
|
# use visible heads as it should be cached
|
|
|
og.missingheads = repo.filtered("served").heads()
|
|
|
og.excluded = [ctx.node() for ctx in repo.set('secret() or extinct()')]
|
|
|
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:
|
|
|
ctx = repo[node]
|
|
|
if ctx.phase() >= phases.secret or ctx.extinct():
|
|
|
excluded.append(node)
|
|
|
else:
|
|
|
missing.append(node)
|
|
|
if len(missing) == len(allmissing):
|
|
|
missingheads = onlyheads
|
|
|
else: # update missing heads
|
|
|
missingheads = phases.newheads(repo, onlyheads, excluded)
|
|
|
og.missingheads = missingheads
|
|
|
if portable:
|
|
|
# recompute common and missingheads as if -r<rev> had been given for
|
|
|
# each head of missing, and --base <rev> for each head of the proper
|
|
|
# ancestors of missing
|
|
|
og._computecommonmissing()
|
|
|
cl = repo.changelog
|
|
|
missingrevs = set(cl.rev(n) for n in og._missing)
|
|
|
og._common = set(cl.ancestors(missingrevs)) - missingrevs
|
|
|
commonheads = set(og.commonheads)
|
|
|
og.missingheads = [h for h in og.missingheads if h not in commonheads]
|
|
|
|
|
|
return og
|
|
|
|
|
|
def _headssummary(pushop):
|
|
|
"""compute a summary of branch and heads status before and after push
|
|
|
|
|
|
return {'branch': ([remoteheads], [newheads],
|
|
|
[unsyncedheads], [discardedheads])} mapping
|
|
|
|
|
|
- branch: the branch name,
|
|
|
- remoteheads: the list of remote heads known locally
|
|
|
None if the branch is new,
|
|
|
- newheads: the new remote heads (known locally) with outgoing pushed,
|
|
|
- unsyncedheads: the list of remote heads unknown locally,
|
|
|
- discardedheads: the list of heads made obsolete by the push.
|
|
|
"""
|
|
|
repo = pushop.repo.unfiltered()
|
|
|
remote = pushop.remote
|
|
|
outgoing = pushop.outgoing
|
|
|
cl = repo.changelog
|
|
|
headssum = {}
|
|
|
# A. Create set of branches involved in the push.
|
|
|
branches = set(repo[n].branch() for n in outgoing.missing)
|
|
|
remotemap = remote.branchmap()
|
|
|
newbranches = branches - set(remotemap)
|
|
|
branches.difference_update(newbranches)
|
|
|
|
|
|
# A. register remote heads
|
|
|
remotebranches = set()
|
|
|
for branch, heads in remote.branchmap().iteritems():
|
|
|
remotebranches.add(branch)
|
|
|
known = []
|
|
|
unsynced = []
|
|
|
knownnode = cl.hasnode # do not use nodemap until it is filtered
|
|
|
for h in heads:
|
|
|
if knownnode(h):
|
|
|
known.append(h)
|
|
|
else:
|
|
|
unsynced.append(h)
|
|
|
headssum[branch] = (known, list(known), unsynced)
|
|
|
# B. add new branch data
|
|
|
missingctx = list(repo[n] for n in outgoing.missing)
|
|
|
touchedbranches = set()
|
|
|
for ctx in missingctx:
|
|
|
branch = ctx.branch()
|
|
|
touchedbranches.add(branch)
|
|
|
if branch not in headssum:
|
|
|
headssum[branch] = (None, [], [])
|
|
|
|
|
|
# C drop data about untouched branches:
|
|
|
for branch in remotebranches - touchedbranches:
|
|
|
del headssum[branch]
|
|
|
|
|
|
# D. Update newmap with outgoing changes.
|
|
|
# This will possibly add new heads and remove existing ones.
|
|
|
newmap = branchmap.branchcache((branch, heads[1])
|
|
|
for branch, heads in headssum.iteritems()
|
|
|
if heads[0] is not None)
|
|
|
newmap.update(repo, (ctx.rev() for ctx in missingctx))
|
|
|
for branch, newheads in newmap.iteritems():
|
|
|
headssum[branch][1][:] = newheads
|
|
|
for branch, items in headssum.iteritems():
|
|
|
for l in items:
|
|
|
if l is not None:
|
|
|
l.sort()
|
|
|
headssum[branch] = items + ([],)
|
|
|
|
|
|
# If there are no obsstore, no post processing are needed.
|
|
|
if repo.obsstore:
|
|
|
torev = repo.changelog.rev
|
|
|
futureheads = set(torev(h) for h in outgoing.missingheads)
|
|
|
futureheads |= set(torev(h) for h in outgoing.commonheads)
|
|
|
allfuturecommon = repo.changelog.ancestors(futureheads, inclusive=True)
|
|
|
for branch, heads in sorted(headssum.iteritems()):
|
|
|
remoteheads, newheads, unsyncedheads, placeholder = heads
|
|
|
result = _postprocessobsolete(pushop, allfuturecommon, newheads)
|
|
|
headssum[branch] = (remoteheads, sorted(result[0]), unsyncedheads,
|
|
|
sorted(result[1]))
|
|
|
return headssum
|
|
|
|
|
|
def _oldheadssummary(repo, remoteheads, outgoing, inc=False):
|
|
|
"""Compute branchmapsummary for repo without branchmap support"""
|
|
|
|
|
|
# 1-4b. old servers: Check for new topological heads.
|
|
|
# Construct {old,new}map with branch = None (topological branch).
|
|
|
# (code based on update)
|
|
|
knownnode = repo.changelog.hasnode # no nodemap until it is filtered
|
|
|
oldheads = sorted(h for h in remoteheads if knownnode(h))
|
|
|
# all nodes in outgoing.missing are children of either:
|
|
|
# - an element of oldheads
|
|
|
# - another element of outgoing.missing
|
|
|
# - nullrev
|
|
|
# This explains why the new head are very simple to compute.
|
|
|
r = repo.set('heads(%ln + %ln)', oldheads, outgoing.missing)
|
|
|
newheads = sorted(c.node() for c in r)
|
|
|
# set some unsynced head to issue the "unsynced changes" warning
|
|
|
if inc:
|
|
|
unsynced = [None]
|
|
|
else:
|
|
|
unsynced = []
|
|
|
return {None: (oldheads, newheads, unsynced, [])}
|
|
|
|
|
|
def _nowarnheads(pushop):
|
|
|
# Compute newly pushed bookmarks. We don't warn about bookmarked heads.
|
|
|
repo = pushop.repo.unfiltered()
|
|
|
remote = pushop.remote
|
|
|
localbookmarks = repo._bookmarks
|
|
|
remotebookmarks = remote.listkeys('bookmarks')
|
|
|
bookmarkedheads = set()
|
|
|
|
|
|
# internal config: bookmarks.pushing
|
|
|
newbookmarks = [localbookmarks.expandname(b)
|
|
|
for b in pushop.ui.configlist('bookmarks', 'pushing')]
|
|
|
|
|
|
for bm in localbookmarks:
|
|
|
rnode = remotebookmarks.get(bm)
|
|
|
if rnode and rnode in repo:
|
|
|
lctx, rctx = repo[bm], repo[rnode]
|
|
|
if bookmarks.validdest(repo, rctx, lctx):
|
|
|
bookmarkedheads.add(lctx.node())
|
|
|
else:
|
|
|
if bm in newbookmarks and bm not in remotebookmarks:
|
|
|
bookmarkedheads.add(repo[bm].node())
|
|
|
|
|
|
return bookmarkedheads
|
|
|
|
|
|
def checkheads(pushop):
|
|
|
"""Check that a push won't add any outgoing head
|
|
|
|
|
|
raise Abort error and display ui message as needed.
|
|
|
"""
|
|
|
|
|
|
repo = pushop.repo.unfiltered()
|
|
|
remote = pushop.remote
|
|
|
outgoing = pushop.outgoing
|
|
|
remoteheads = pushop.remoteheads
|
|
|
newbranch = pushop.newbranch
|
|
|
inc = bool(pushop.incoming)
|
|
|
|
|
|
# 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
|
|
|
if remoteheads == [nullid]:
|
|
|
# remote is empty, nothing to check.
|
|
|
return
|
|
|
|
|
|
if remote.capable('branchmap'):
|
|
|
headssum = _headssummary(pushop)
|
|
|
else:
|
|
|
headssum = _oldheadssummary(repo, remoteheads, outgoing, inc)
|
|
|
pushop.pushbranchmap = headssum
|
|
|
newbranches = [branch for branch, heads in headssum.iteritems()
|
|
|
if heads[0] is None]
|
|
|
# 1. Check for new branches on the remote.
|
|
|
if newbranches and not newbranch: # new branch requires --new-branch
|
|
|
branchnames = ', '.join(sorted(newbranches))
|
|
|
raise error.Abort(_("push creates new remote branches: %s!")
|
|
|
% branchnames,
|
|
|
hint=_("use 'hg push --new-branch' to create"
|
|
|
" new remote branches"))
|
|
|
|
|
|
# 2. Find heads that we need not warn about
|
|
|
nowarnheads = _nowarnheads(pushop)
|
|
|
|
|
|
# 3. Check for new heads.
|
|
|
# If there are more heads after the push than before, a suitable
|
|
|
# error message, depending on unsynced status, is displayed.
|
|
|
errormsg = None
|
|
|
for branch, heads in sorted(headssum.iteritems()):
|
|
|
remoteheads, newheads, unsyncedheads, discardedheads = heads
|
|
|
# add unsynced data
|
|
|
if remoteheads is None:
|
|
|
oldhs = set()
|
|
|
else:
|
|
|
oldhs = set(remoteheads)
|
|
|
oldhs.update(unsyncedheads)
|
|
|
dhs = None # delta heads, the new heads on branch
|
|
|
newhs = set(newheads)
|
|
|
newhs.update(unsyncedheads)
|
|
|
if unsyncedheads:
|
|
|
if None in unsyncedheads:
|
|
|
# old remote, no heads data
|
|
|
heads = None
|
|
|
else:
|
|
|
heads = scmutil.nodesummaries(repo, unsyncedheads)
|
|
|
if heads is None:
|
|
|
repo.ui.status(_("remote has heads that are "
|
|
|
"not known locally\n"))
|
|
|
elif branch is None:
|
|
|
repo.ui.status(_("remote has heads that are "
|
|
|
"not known locally: %s\n") % heads)
|
|
|
else:
|
|
|
repo.ui.status(_("remote has heads on branch '%s' that are "
|
|
|
"not known locally: %s\n") % (branch, heads))
|
|
|
if remoteheads is None:
|
|
|
if len(newhs) > 1:
|
|
|
dhs = list(newhs)
|
|
|
if errormsg is None:
|
|
|
errormsg = (_("push creates new branch '%s' "
|
|
|
"with multiple heads") % (branch))
|
|
|
hint = _("merge or"
|
|
|
" see 'hg help push' for details about"
|
|
|
" 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 ('default', None):
|
|
|
errormsg = _("push creates new remote head %s "
|
|
|
"on branch '%s'!") % (short(dhs[0]), branch)
|
|
|
elif repo[dhs[0]].bookmarks():
|
|
|
errormsg = _("push creates new remote head %s "
|
|
|
"with bookmark '%s'!") % (
|
|
|
short(dhs[0]), repo[dhs[0]].bookmarks()[0])
|
|
|
else:
|
|
|
errormsg = _("push creates new remote head %s!"
|
|
|
) % short(dhs[0])
|
|
|
if unsyncedheads:
|
|
|
hint = _("pull and merge or"
|
|
|
" see 'hg help push' for details about"
|
|
|
" pushing new heads")
|
|
|
else:
|
|
|
hint = _("merge or"
|
|
|
" see 'hg help push' for details about"
|
|
|
" pushing new heads")
|
|
|
if branch is None:
|
|
|
repo.ui.note(_("new remote heads:\n"))
|
|
|
else:
|
|
|
repo.ui.note(_("new remote heads on branch '%s':\n") % branch)
|
|
|
for h in dhs:
|
|
|
repo.ui.note((" %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 = ('checkheads: remote head unknown locally has'
|
|
|
' 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('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
|
|
|
|
