# exchange.py - utility to exchange data between repos.
#
# Copyright 2005-2007 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 i18n import _
from node import hex, nullid
import errno, urllib
import util, scmutil, changegroup, base85, error
import discovery, phases, obsolete, bookmarks as bookmod, bundle2, pushkey
def readbundle(ui, fh, fname, vfs=None):
header = changegroup.readexactly(fh, 4)
alg = None
if not fname:
fname = "stream"
if not header.startswith('HG') and header.startswith('\0'):
fh = changegroup.headerlessfixup(fh, header)
header = "HG10"
alg = 'UN'
elif vfs:
fname = vfs.join(fname)
magic, version = header[0:2], header[2:4]
if magic != 'HG':
raise util.Abort(_('%s: not a Mercurial bundle') % fname)
if version == '10':
if alg is None:
alg = changegroup.readexactly(fh, 2)
return changegroup.cg1unpacker(fh, alg)
elif version == '2Y':
return bundle2.unbundle20(ui, fh, header=magic + version)
else:
raise util.Abort(_('%s: unknown bundle version %s') % (fname, version))
def buildobsmarkerspart(bundler, markers):
"""add an obsmarker part to the bundler with <markers>
No part is created if markers is empty.
Raises ValueError if the bundler doesn't support any known obsmarker format.
"""
if markers:
remoteversions = bundle2.obsmarkersversion(bundler.capabilities)
version = obsolete.commonversion(remoteversions)
if version is None:
raise ValueError('bundler do not support common obsmarker format')
stream = obsolete.encodemarkers(markers, True, version=version)
return bundler.newpart('b2x:obsmarkers', data=stream)
return None
class pushoperation(object):
"""A object that represent a single push operation
It purpose is to carry push related state and very common operation.
A new should be created at the beginning of each push and discarded
afterward.
"""
def __init__(self, repo, remote, force=False, revs=None, newbranch=False,
bookmarks=()):
# repo we push from
self.repo = repo
self.ui = repo.ui
# repo we push to
self.remote = remote
# force option provided
self.force = force
# revs to be pushed (None is "all")
self.revs = revs
# bookmark explicitly pushed
self.bookmarks = bookmarks
# allow push of new branch
self.newbranch = newbranch
# did a local lock get acquired?
self.locallocked = None
# step already performed
# (used to check what steps have been already performed through bundle2)
self.stepsdone = set()
# Integer version of the changegroup push result
# - None means nothing to push
# - 0 means HTTP error
# - 1 means we pushed and remote head count is unchanged *or*
# we have outgoing changesets but refused to push
# - other values as described by addchangegroup()
self.cgresult = None
# Boolean value for the bookmark push
self.bkresult = None
# discover.outgoing object (contains common and outgoing data)
self.outgoing = None
# all remote heads before the push
self.remoteheads = None
# testable as a boolean indicating if any nodes are missing locally.
self.incoming = None
# phases changes that must be pushed along side the changesets
self.outdatedphases = None
# phases changes that must be pushed if changeset push fails
self.fallbackoutdatedphases = None
# outgoing obsmarkers
self.outobsmarkers = set()
# outgoing bookmarks
self.outbookmarks = []
# transaction manager
self.trmanager = None
@util.propertycache
def futureheads(self):
"""future remote heads if the changeset push succeeds"""
return self.outgoing.missingheads
@util.propertycache
def fallbackheads(self):
"""future remote heads if the changeset push fails"""
if self.revs is None:
# not target to push, all common are relevant
return self.outgoing.commonheads
unfi = self.repo.unfiltered()
# I want cheads = heads(::missingheads and ::commonheads)
# (missingheads is revs with secret changeset filtered out)
#
# This can be expressed as:
# cheads = ( (missingheads and ::commonheads)
# + (commonheads and ::missingheads))"
# )
#
# while trying to push we already computed the following:
# common = (::commonheads)
# missing = ((commonheads::missingheads) - commonheads)
#
# We can pick:
# * missingheads part of common (::commonheads)
common = set(self.outgoing.common)
nm = self.repo.changelog.nodemap
cheads = [node for node in self.revs if nm[node] in common]
# and
# * commonheads parents on missing
revset = unfi.set('%ln and parents(roots(%ln))',
self.outgoing.commonheads,
self.outgoing.missing)
cheads.extend(c.node() for c in revset)
return cheads
@property
def commonheads(self):
"""set of all common heads after changeset bundle push"""
if self.cgresult:
return self.futureheads
else:
return self.fallbackheads
# mapping of message used when pushing bookmark
bookmsgmap = {'update': (_("updating bookmark %s\n"),
_('updating bookmark %s failed!\n')),
'export': (_("exporting bookmark %s\n"),
_('exporting bookmark %s failed!\n')),
'delete': (_("deleting remote bookmark %s\n"),
_('deleting remote bookmark %s failed!\n')),
}
def push(repo, remote, force=False, revs=None, newbranch=False, bookmarks=()):
'''Push outgoing changesets (limited by revs) from a local
repository to remote. Return an integer:
- None means nothing to push
- 0 means HTTP error
- 1 means we pushed and remote head count is unchanged *or*
we have outgoing changesets but refused to push
- other values as described by addchangegroup()
'''
pushop = pushoperation(repo, remote, force, revs, newbranch, bookmarks)
if pushop.remote.local():
missing = (set(pushop.repo.requirements)
- pushop.remote.local().supported)
if missing:
msg = _("required features are not"
" supported in the destination:"
" %s") % (', '.join(sorted(missing)))
raise util.Abort(msg)
# there are two ways to push to remote repo:
#
# addchangegroup assumes local user can lock remote
# repo (local filesystem, old ssh servers).
#
# unbundle assumes local user cannot lock remote repo (new ssh
# servers, http servers).
if not pushop.remote.canpush():
raise util.Abort(_("destination does not support push"))
# get local lock as we might write phase data
locallock = None
try:
locallock = pushop.repo.lock()
pushop.locallocked = True
except IOError, err:
pushop.locallocked = False
if err.errno != errno.EACCES:
raise
# source repo cannot be locked.
# We do not abort the push, but just disable the local phase
# synchronisation.
msg = 'cannot lock source repository: %s\n' % err
pushop.ui.debug(msg)
try:
if pushop.locallocked:
pushop.trmanager = transactionmanager(repo,
'push-response',
pushop.remote.url())
pushop.repo.checkpush(pushop)
lock = None
unbundle = pushop.remote.capable('unbundle')
if not unbundle:
lock = pushop.remote.lock()
try:
_pushdiscovery(pushop)
if (pushop.repo.ui.configbool('experimental', 'bundle2-exp',
False)
and pushop.remote.capable('bundle2-exp')):
_pushbundle2(pushop)
_pushchangeset(pushop)
_pushsyncphase(pushop)
_pushobsolete(pushop)
_pushbookmark(pushop)
finally:
if lock is not None:
lock.release()
if pushop.trmanager:
pushop.trmanager.close()
finally:
if pushop.trmanager:
pushop.trmanager.release()
if locallock is not None:
locallock.release()
return pushop
# list of steps to perform discovery before push
pushdiscoveryorder = []
# Mapping between step name and function
#
# This exists to help extensions wrap steps if necessary
pushdiscoverymapping = {}
def pushdiscovery(stepname):
"""decorator for function performing discovery before push
The function is added to the step -> function mapping and appended to the
list of steps. Beware that decorated function will be added in order (this
may matter).
You can only use this decorator for a new step, if you want to wrap a step
from an extension, change the pushdiscovery dictionary directly."""
def dec(func):
assert stepname not in pushdiscoverymapping
pushdiscoverymapping[stepname] = func
pushdiscoveryorder.append(stepname)
return func
return dec
def _pushdiscovery(pushop):
"""Run all discovery steps"""
for stepname in pushdiscoveryorder:
step = pushdiscoverymapping[stepname]
step(pushop)
@pushdiscovery('changeset')
def _pushdiscoverychangeset(pushop):
"""discover the changeset that need to be pushed"""
fci = discovery.findcommonincoming
commoninc = fci(pushop.repo, pushop.remote, force=pushop.force)
common, inc, remoteheads = commoninc
fco = discovery.findcommonoutgoing
outgoing = fco(pushop.repo, pushop.remote, onlyheads=pushop.revs,
commoninc=commoninc, force=pushop.force)
pushop.outgoing = outgoing
pushop.remoteheads = remoteheads
pushop.incoming = inc
@pushdiscovery('phase')
def _pushdiscoveryphase(pushop):
"""discover the phase that needs to be pushed
(computed for both success and failure case for changesets push)"""
outgoing = pushop.outgoing
unfi = pushop.repo.unfiltered()
remotephases = pushop.remote.listkeys('phases')
publishing = remotephases.get('publishing', False)
ana = phases.analyzeremotephases(pushop.repo,
pushop.fallbackheads,
remotephases)
pheads, droots = ana
extracond = ''
if not publishing:
extracond = ' and public()'
revset = 'heads((%%ln::%%ln) %s)' % extracond
# Get the list of all revs draft on remote by public here.
# XXX Beware that revset break if droots is not strictly
# XXX root we may want to ensure it is but it is costly
fallback = list(unfi.set(revset, droots, pushop.fallbackheads))
if not outgoing.missing:
future = fallback
else:
# adds changeset we are going to push as draft
#
# should not be necessary for publishing server, but because of an
# issue fixed in xxxxx we have to do it anyway.
fdroots = list(unfi.set('roots(%ln + %ln::)',
outgoing.missing, droots))
fdroots = [f.node() for f in fdroots]
future = list(unfi.set(revset, fdroots, pushop.futureheads))
pushop.outdatedphases = future
pushop.fallbackoutdatedphases = fallback
@pushdiscovery('obsmarker')
def _pushdiscoveryobsmarkers(pushop):
if (obsolete.isenabled(pushop.repo, obsolete.exchangeopt)
and pushop.repo.obsstore
and 'obsolete' in pushop.remote.listkeys('namespaces')):
repo = pushop.repo
# very naive computation, that can be quite expensive on big repo.
# However: evolution is currently slow on them anyway.
nodes = (c.node() for c in repo.set('::%ln', pushop.futureheads))
pushop.outobsmarkers = pushop.repo.obsstore.relevantmarkers(nodes)
@pushdiscovery('bookmarks')
def _pushdiscoverybookmarks(pushop):
ui = pushop.ui
repo = pushop.repo.unfiltered()
remote = pushop.remote
ui.debug("checking for updated bookmarks\n")
ancestors = ()
if pushop.revs:
revnums = map(repo.changelog.rev, pushop.revs)
ancestors = repo.changelog.ancestors(revnums, inclusive=True)
remotebookmark = remote.listkeys('bookmarks')
explicit = set(pushop.bookmarks)
comp = bookmod.compare(repo, repo._bookmarks, remotebookmark, srchex=hex)
addsrc, adddst, advsrc, advdst, diverge, differ, invalid, same = comp
for b, scid, dcid in advsrc:
if b in explicit:
explicit.remove(b)
if not ancestors or repo[scid].rev() in ancestors:
pushop.outbookmarks.append((b, dcid, scid))
# search added bookmark
for b, scid, dcid in addsrc:
if b in explicit:
explicit.remove(b)
pushop.outbookmarks.append((b, '', scid))
# search for overwritten bookmark
for b, scid, dcid in advdst + diverge + differ:
if b in explicit:
explicit.remove(b)
pushop.outbookmarks.append((b, dcid, scid))
# search for bookmark to delete
for b, scid, dcid in adddst:
if b in explicit:
explicit.remove(b)
# treat as "deleted locally"
pushop.outbookmarks.append((b, dcid, ''))
# identical bookmarks shouldn't get reported
for b, scid, dcid in same:
if b in explicit:
explicit.remove(b)
if explicit:
explicit = sorted(explicit)
# we should probably list all of them
ui.warn(_('bookmark %s does not exist on the local '
'or remote repository!\n') % explicit[0])
pushop.bkresult = 2
pushop.outbookmarks.sort()
def _pushcheckoutgoing(pushop):
outgoing = pushop.outgoing
unfi = pushop.repo.unfiltered()
if not outgoing.missing:
# nothing to push
scmutil.nochangesfound(unfi.ui, unfi, outgoing.excluded)
return False
# something to push
if not pushop.force:
# if repo.obsstore == False --> no obsolete
# then, save the iteration
if unfi.obsstore:
# this message are here for 80 char limit reason
mso = _("push includes obsolete changeset: %s!")
mst = {"unstable": _("push includes unstable changeset: %s!"),
"bumped": _("push includes bumped changeset: %s!"),
"divergent": _("push includes divergent changeset: %s!")}
# If we are to push if there is at least one
# obsolete or unstable changeset in missing, at
# least one of the missinghead will be obsolete or
# unstable. So checking heads only is ok
for node in outgoing.missingheads:
ctx = unfi[node]
if ctx.obsolete():
raise util.Abort(mso % ctx)
elif ctx.troubled():
raise util.Abort(mst[ctx.troubles()[0]] % ctx)
newbm = pushop.ui.configlist('bookmarks', 'pushing')
discovery.checkheads(unfi, pushop.remote, outgoing,
pushop.remoteheads,
pushop.newbranch,
bool(pushop.incoming),
newbm)
return True
# List of names of steps to perform for an outgoing bundle2, order matters.
b2partsgenorder = []
# Mapping between step name and function
#
# This exists to help extensions wrap steps if necessary
b2partsgenmapping = {}
def b2partsgenerator(stepname):
"""decorator for function generating bundle2 part
The function is added to the step -> function mapping and appended to the
list of steps. Beware that decorated functions will be added in order
(this may matter).
You can only use this decorator for new steps, if you want to wrap a step
from an extension, attack the b2partsgenmapping dictionary directly."""
def dec(func):
assert stepname not in b2partsgenmapping
b2partsgenmapping[stepname] = func
b2partsgenorder.append(stepname)
return func
return dec
@b2partsgenerator('changeset')
def _pushb2ctx(pushop, bundler):
"""handle changegroup push through bundle2
addchangegroup result is stored in the ``pushop.cgresult`` attribute.
"""
if 'changesets' in pushop.stepsdone:
return
pushop.stepsdone.add('changesets')
# Send known heads to the server for race detection.
if not _pushcheckoutgoing(pushop):
return
pushop.repo.prepushoutgoinghooks(pushop.repo,
pushop.remote,
pushop.outgoing)
if not pushop.force:
bundler.newpart('b2x:check:heads', data=iter(pushop.remoteheads))
b2caps = bundle2.bundle2caps(pushop.remote)
version = None
cgversions = b2caps.get('b2x:changegroup')
if not cgversions: # 3.1 and 3.2 ship with an empty value
cg = changegroup.getlocalchangegroupraw(pushop.repo, 'push',
pushop.outgoing)
else:
cgversions = [v for v in cgversions if v in changegroup.packermap]
if not cgversions:
raise ValueError(_('no common changegroup version'))
version = max(cgversions)
cg = changegroup.getlocalchangegroupraw(pushop.repo, 'push',
pushop.outgoing,
version=version)
cgpart = bundler.newpart('b2x:changegroup', data=cg)
if version is not None:
cgpart.addparam('version', version)
def handlereply(op):
"""extract addchangegroup returns from server reply"""
cgreplies = op.records.getreplies(cgpart.id)
assert len(cgreplies['changegroup']) == 1
pushop.cgresult = cgreplies['changegroup'][0]['return']
return handlereply
@b2partsgenerator('phase')
def _pushb2phases(pushop, bundler):
"""handle phase push through bundle2"""
if 'phases' in pushop.stepsdone:
return
b2caps = bundle2.bundle2caps(pushop.remote)
if not 'b2x:pushkey' in b2caps:
return
pushop.stepsdone.add('phases')
part2node = []
enc = pushkey.encode
for newremotehead in pushop.outdatedphases:
part = bundler.newpart('b2x:pushkey')
part.addparam('namespace', enc('phases'))
part.addparam('key', enc(newremotehead.hex()))
part.addparam('old', enc(str(phases.draft)))
part.addparam('new', enc(str(phases.public)))
part2node.append((part.id, newremotehead))
def handlereply(op):
for partid, node in part2node:
partrep = op.records.getreplies(partid)
results = partrep['pushkey']
assert len(results) <= 1
msg = None
if not results:
msg = _('server ignored update of %s to public!\n') % node
elif not int(results[0]['return']):
msg = _('updating %s to public failed!\n') % node
if msg is not None:
pushop.ui.warn(msg)
return handlereply
@b2partsgenerator('obsmarkers')
def _pushb2obsmarkers(pushop, bundler):
if 'obsmarkers' in pushop.stepsdone:
return
remoteversions = bundle2.obsmarkersversion(bundler.capabilities)
if obsolete.commonversion(remoteversions) is None:
return
pushop.stepsdone.add('obsmarkers')
if pushop.outobsmarkers:
buildobsmarkerspart(bundler, pushop.outobsmarkers)
@b2partsgenerator('bookmarks')
def _pushb2bookmarks(pushop, bundler):
"""handle phase push through bundle2"""
if 'bookmarks' in pushop.stepsdone:
return
b2caps = bundle2.bundle2caps(pushop.remote)
if 'b2x:pushkey' not in b2caps:
return
pushop.stepsdone.add('bookmarks')
part2book = []
enc = pushkey.encode
for book, old, new in pushop.outbookmarks:
part = bundler.newpart('b2x:pushkey')
part.addparam('namespace', enc('bookmarks'))
part.addparam('key', enc(book))
part.addparam('old', enc(old))
part.addparam('new', enc(new))
action = 'update'
if not old:
action = 'export'
elif not new:
action = 'delete'
part2book.append((part.id, book, action))
def handlereply(op):
ui = pushop.ui
for partid, book, action in part2book:
partrep = op.records.getreplies(partid)
results = partrep['pushkey']
assert len(results) <= 1
if not results:
pushop.ui.warn(_('server ignored bookmark %s update\n') % book)
else:
ret = int(results[0]['return'])
if ret:
ui.status(bookmsgmap[action][0] % book)
else:
ui.warn(bookmsgmap[action][1] % book)
if pushop.bkresult is not None:
pushop.bkresult = 1
return handlereply
def _pushbundle2(pushop):
"""push data to the remote using bundle2
The only currently supported type of data is changegroup but this will
evolve in the future."""
bundler = bundle2.bundle20(pushop.ui, bundle2.bundle2caps(pushop.remote))
pushback = (pushop.trmanager
and pushop.ui.configbool('experimental', 'bundle2.pushback'))
# create reply capability
capsblob = bundle2.encodecaps(bundle2.getrepocaps(pushop.repo,
allowpushback=pushback))
bundler.newpart('b2x:replycaps', data=capsblob)
replyhandlers = []
for partgenname in b2partsgenorder:
partgen = b2partsgenmapping[partgenname]
ret = partgen(pushop, bundler)
if callable(ret):
replyhandlers.append(ret)
# do not push if nothing to push
if bundler.nbparts <= 1:
return
stream = util.chunkbuffer(bundler.getchunks())
try:
reply = pushop.remote.unbundle(stream, ['force'], 'push')
except error.BundleValueError, exc:
raise util.Abort('missing support for %s' % exc)
try:
trgetter = None
if pushback:
trgetter = pushop.trmanager.transaction
op = bundle2.processbundle(pushop.repo, reply, trgetter)
except error.BundleValueError, exc:
raise util.Abort('missing support for %s' % exc)
for rephand in replyhandlers:
rephand(op)
def _pushchangeset(pushop):
"""Make the actual push of changeset bundle to remote repo"""
if 'changesets' in pushop.stepsdone:
return
pushop.stepsdone.add('changesets')
if not _pushcheckoutgoing(pushop):
return
pushop.repo.prepushoutgoinghooks(pushop.repo,
pushop.remote,
pushop.outgoing)
outgoing = pushop.outgoing
unbundle = pushop.remote.capable('unbundle')
# TODO: get bundlecaps from remote
bundlecaps = None
# create a changegroup from local
if pushop.revs is None and not (outgoing.excluded
or pushop.repo.changelog.filteredrevs):
# push everything,
# use the fast path, no race possible on push
bundler = changegroup.cg1packer(pushop.repo, bundlecaps)
cg = changegroup.getsubset(pushop.repo,
outgoing,
bundler,
'push',
fastpath=True)
else:
cg = changegroup.getlocalchangegroup(pushop.repo, 'push', outgoing,
bundlecaps)
# apply changegroup to remote
if unbundle:
# local repo finds heads on server, finds out what
# revs it must push. once revs transferred, if server
# finds it has different heads (someone else won
# commit/push race), server aborts.
if pushop.force:
remoteheads = ['force']
else:
remoteheads = pushop.remoteheads
# ssh: return remote's addchangegroup()
# http: return remote's addchangegroup() or 0 for error
pushop.cgresult = pushop.remote.unbundle(cg, remoteheads,
pushop.repo.url())
else:
# we return an integer indicating remote head count
# change
pushop.cgresult = pushop.remote.addchangegroup(cg, 'push',
pushop.repo.url())
def _pushsyncphase(pushop):
"""synchronise phase information locally and remotely"""
cheads = pushop.commonheads
# even when we don't push, exchanging phase data is useful
remotephases = pushop.remote.listkeys('phases')
if (pushop.ui.configbool('ui', '_usedassubrepo', False)
and remotephases # server supports phases
and pushop.cgresult is None # nothing was pushed
and remotephases.get('publishing', False)):
# When:
# - this is a subrepo push
# - and remote support phase
# - and no changeset was pushed
# - and remote is publishing
# We may be in issue 3871 case!
# We drop the possible phase synchronisation done by
# courtesy to publish changesets possibly locally draft
# on the remote.
remotephases = {'publishing': 'True'}
if not remotephases: # old server or public only reply from non-publishing
_localphasemove(pushop, cheads)
# don't push any phase data as there is nothing to push
else:
ana = phases.analyzeremotephases(pushop.repo, cheads,
remotephases)
pheads, droots = ana
### Apply remote phase on local
if remotephases.get('publishing', False):
_localphasemove(pushop, cheads)
else: # publish = False
_localphasemove(pushop, pheads)
_localphasemove(pushop, cheads, phases.draft)
### Apply local phase on remote
if pushop.cgresult:
if 'phases' in pushop.stepsdone:
# phases already pushed though bundle2
return
outdated = pushop.outdatedphases
else:
outdated = pushop.fallbackoutdatedphases
pushop.stepsdone.add('phases')
# filter heads already turned public by the push
outdated = [c for c in outdated if c.node() not in pheads]
# fallback to independent pushkey command
for newremotehead in outdated:
r = pushop.remote.pushkey('phases',
newremotehead.hex(),
str(phases.draft),
str(phases.public))
if not r:
pushop.ui.warn(_('updating %s to public failed!\n')
% newremotehead)
def _localphasemove(pushop, nodes, phase=phases.public):
"""move <nodes> to <phase> in the local source repo"""
if pushop.trmanager:
phases.advanceboundary(pushop.repo,
pushop.trmanager.transaction(),
phase,
nodes)
else:
# repo is not locked, do not change any phases!
# Informs the user that phases should have been moved when
# applicable.
actualmoves = [n for n in nodes if phase < pushop.repo[n].phase()]
phasestr = phases.phasenames[phase]
if actualmoves:
pushop.ui.status(_('cannot lock source repo, skipping '
'local %s phase update\n') % phasestr)
def _pushobsolete(pushop):
"""utility function to push obsolete markers to a remote"""
if 'obsmarkers' in pushop.stepsdone:
return
pushop.ui.debug('try to push obsolete markers to remote\n')
repo = pushop.repo
remote = pushop.remote
pushop.stepsdone.add('obsmarkers')
if pushop.outobsmarkers:
rslts = []
remotedata = obsolete._pushkeyescape(pushop.outobsmarkers)
for key in sorted(remotedata, reverse=True):
# reverse sort to ensure we end with dump0
data = remotedata[key]
rslts.append(remote.pushkey('obsolete', key, '', data))
if [r for r in rslts if not r]:
msg = _('failed to push some obsolete markers!\n')
repo.ui.warn(msg)
def _pushbookmark(pushop):
"""Update bookmark position on remote"""
if pushop.cgresult == 0 or 'bookmarks' in pushop.stepsdone:
return
pushop.stepsdone.add('bookmarks')
ui = pushop.ui
remote = pushop.remote
for b, old, new in pushop.outbookmarks:
action = 'update'
if not old:
action = 'export'
elif not new:
action = 'delete'
if remote.pushkey('bookmarks', b, old, new):
ui.status(bookmsgmap[action][0] % b)
else:
ui.warn(bookmsgmap[action][1] % b)
# discovery can have set the value form invalid entry
if pushop.bkresult is not None:
pushop.bkresult = 1
class pulloperation(object):
"""A object that represent a single pull operation
It purpose is to carry pull related state and very common operation.
A new should be created at the beginning of each pull and discarded
afterward.
"""
def __init__(self, repo, remote, heads=None, force=False, bookmarks=()):
# repo we pull into
self.repo = repo
# repo we pull from
self.remote = remote
# revision we try to pull (None is "all")
self.heads = heads
# bookmark pulled explicitly
self.explicitbookmarks = bookmarks
# do we force pull?
self.force = force
# transaction manager
self.trmanager = None
# set of common changeset between local and remote before pull
self.common = None
# set of pulled head
self.rheads = None
# list of missing changeset to fetch remotely
self.fetch = None
# remote bookmarks data
self.remotebookmarks = None
# result of changegroup pulling (used as return code by pull)
self.cgresult = None
# list of step already done
self.stepsdone = set()
@util.propertycache
def pulledsubset(self):
"""heads of the set of changeset target by the pull"""
# compute target subset
if self.heads is None:
# We pulled every thing possible
# sync on everything common
c = set(self.common)
ret = list(self.common)
for n in self.rheads:
if n not in c:
ret.append(n)
return ret
else:
# We pulled a specific subset
# sync on this subset
return self.heads
def gettransaction(self):
# deprecated; talk to trmanager directly
return self.trmanager.transaction()
class transactionmanager(object):
"""An object to manage the life cycle of a transaction
It creates the transaction on demand and calls the appropriate hooks when
closing the transaction."""
def __init__(self, repo, source, url):
self.repo = repo
self.source = source
self.url = url
self._tr = None
def transaction(self):
"""Return an open transaction object, constructing if necessary"""
if not self._tr:
trname = '%s\n%s' % (self.source, util.hidepassword(self.url))
self._tr = self.repo.transaction(trname)
self._tr.hookargs['source'] = self.source
self._tr.hookargs['url'] = self.url
return self._tr
def close(self):
"""close transaction if created"""
if self._tr is not None:
repo = self.repo
p = lambda: self._tr.writepending() and repo.root or ""
repo.hook('b2x-pretransactionclose', throw=True, pending=p,
**self._tr.hookargs)
hookargs = dict(self._tr.hookargs)
def runhooks():
repo.hook('b2x-transactionclose', **hookargs)
self._tr.addpostclose('b2x-hook-transactionclose',
lambda tr: repo._afterlock(runhooks))
self._tr.close()
def release(self):
"""release transaction if created"""
if self._tr is not None:
self._tr.release()
def pull(repo, remote, heads=None, force=False, bookmarks=()):
pullop = pulloperation(repo, remote, heads, force, bookmarks=bookmarks)
if pullop.remote.local():
missing = set(pullop.remote.requirements) - pullop.repo.supported
if missing:
msg = _("required features are not"
" supported in the destination:"
" %s") % (', '.join(sorted(missing)))
raise util.Abort(msg)
pullop.remotebookmarks = remote.listkeys('bookmarks')
lock = pullop.repo.lock()
try:
pullop.trmanager = transactionmanager(repo, 'pull', remote.url())
_pulldiscovery(pullop)
if (pullop.repo.ui.configbool('experimental', 'bundle2-exp', False)
and pullop.remote.capable('bundle2-exp')):
_pullbundle2(pullop)
_pullchangeset(pullop)
_pullphase(pullop)
_pullbookmarks(pullop)
_pullobsolete(pullop)
pullop.trmanager.close()
finally:
pullop.trmanager.release()
lock.release()
return pullop
# list of steps to perform discovery before pull
pulldiscoveryorder = []
# Mapping between step name and function
#
# This exists to help extensions wrap steps if necessary
pulldiscoverymapping = {}
def pulldiscovery(stepname):
"""decorator for function performing discovery before pull
The function is added to the step -> function mapping and appended to the
list of steps. Beware that decorated function will be added in order (this
may matter).
You can only use this decorator for a new step, if you want to wrap a step
from an extension, change the pulldiscovery dictionary directly."""
def dec(func):
assert stepname not in pulldiscoverymapping
pulldiscoverymapping[stepname] = func
pulldiscoveryorder.append(stepname)
return func
return dec
def _pulldiscovery(pullop):
"""Run all discovery steps"""
for stepname in pulldiscoveryorder:
step = pulldiscoverymapping[stepname]
step(pullop)
@pulldiscovery('changegroup')
def _pulldiscoverychangegroup(pullop):
"""discovery phase for the pull
Current handle changeset discovery only, will change handle all discovery
at some point."""
tmp = discovery.findcommonincoming(pullop.repo,
pullop.remote,
heads=pullop.heads,
force=pullop.force)
common, fetch, rheads = tmp
nm = pullop.repo.unfiltered().changelog.nodemap
if fetch and rheads:
# If a remote heads in filtered locally, lets drop it from the unknown
# remote heads and put in back in common.
#
# This is a hackish solution to catch most of "common but locally
# hidden situation". We do not performs discovery on unfiltered
# repository because it end up doing a pathological amount of round
# trip for w huge amount of changeset we do not care about.
#
# If a set of such "common but filtered" changeset exist on the server
# but are not including a remote heads, we'll not be able to detect it,
scommon = set(common)
filteredrheads = []
for n in rheads:
if n in nm:
if n not in scommon:
common.append(n)
else:
filteredrheads.append(n)
if not filteredrheads:
fetch = []
rheads = filteredrheads
pullop.common = common
pullop.fetch = fetch
pullop.rheads = rheads
def _pullbundle2(pullop):
"""pull data using bundle2
For now, the only supported data are changegroup."""
remotecaps = bundle2.bundle2caps(pullop.remote)
kwargs = {'bundlecaps': caps20to10(pullop.repo)}
# pulling changegroup
pullop.stepsdone.add('changegroup')
kwargs['common'] = pullop.common
kwargs['heads'] = pullop.heads or pullop.rheads
kwargs['cg'] = pullop.fetch
if 'b2x:listkeys' in remotecaps:
kwargs['listkeys'] = ['phase', 'bookmarks']
if not pullop.fetch:
pullop.repo.ui.status(_("no changes found\n"))
pullop.cgresult = 0
else:
if pullop.heads is None and list(pullop.common) == [nullid]:
pullop.repo.ui.status(_("requesting all changes\n"))
if obsolete.isenabled(pullop.repo, obsolete.exchangeopt):
remoteversions = bundle2.obsmarkersversion(remotecaps)
if obsolete.commonversion(remoteversions) is not None:
kwargs['obsmarkers'] = True
pullop.stepsdone.add('obsmarkers')
_pullbundle2extraprepare(pullop, kwargs)
if kwargs.keys() == ['format']:
return # nothing to pull
bundle = pullop.remote.getbundle('pull', **kwargs)
try:
op = bundle2.processbundle(pullop.repo, bundle, pullop.gettransaction)
except error.BundleValueError, exc:
raise util.Abort('missing support for %s' % exc)
if pullop.fetch:
results = [cg['return'] for cg in op.records['changegroup']]
pullop.cgresult = changegroup.combineresults(results)
# processing phases change
for namespace, value in op.records['listkeys']:
if namespace == 'phases':
_pullapplyphases(pullop, value)
# processing bookmark update
for namespace, value in op.records['listkeys']:
if namespace == 'bookmarks':
pullop.remotebookmarks = value
_pullbookmarks(pullop)
def _pullbundle2extraprepare(pullop, kwargs):
"""hook function so that extensions can extend the getbundle call"""
pass
def _pullchangeset(pullop):
"""pull changeset from unbundle into the local repo"""
# We delay the open of the transaction as late as possible so we
# don't open transaction for nothing or you break future useful
# rollback call
if 'changegroup' in pullop.stepsdone:
return
pullop.stepsdone.add('changegroup')
if not pullop.fetch:
pullop.repo.ui.status(_("no changes found\n"))
pullop.cgresult = 0
return
pullop.gettransaction()
if pullop.heads is None and list(pullop.common) == [nullid]:
pullop.repo.ui.status(_("requesting all changes\n"))
elif pullop.heads is None and pullop.remote.capable('changegroupsubset'):
# issue1320, avoid a race if remote changed after discovery
pullop.heads = pullop.rheads
if pullop.remote.capable('getbundle'):
# TODO: get bundlecaps from remote
cg = pullop.remote.getbundle('pull', common=pullop.common,
heads=pullop.heads or pullop.rheads)
elif pullop.heads is None:
cg = pullop.remote.changegroup(pullop.fetch, 'pull')
elif not pullop.remote.capable('changegroupsubset'):
raise util.Abort(_("partial pull cannot be done because "
"other repository doesn't support "
"changegroupsubset."))
else:
cg = pullop.remote.changegroupsubset(pullop.fetch, pullop.heads, 'pull')
pullop.cgresult = changegroup.addchangegroup(pullop.repo, cg, 'pull',
pullop.remote.url())
def _pullphase(pullop):
# Get remote phases data from remote
if 'phases' in pullop.stepsdone:
return
remotephases = pullop.remote.listkeys('phases')
_pullapplyphases(pullop, remotephases)
def _pullapplyphases(pullop, remotephases):
"""apply phase movement from observed remote state"""
if 'phases' in pullop.stepsdone:
return
pullop.stepsdone.add('phases')
publishing = bool(remotephases.get('publishing', False))
if remotephases and not publishing:
# remote is new and unpublishing
pheads, _dr = phases.analyzeremotephases(pullop.repo,
pullop.pulledsubset,
remotephases)
dheads = pullop.pulledsubset
else:
# Remote is old or publishing all common changesets
# should be seen as public
pheads = pullop.pulledsubset
dheads = []
unfi = pullop.repo.unfiltered()
phase = unfi._phasecache.phase
rev = unfi.changelog.nodemap.get
public = phases.public
draft = phases.draft
# exclude changesets already public locally and update the others
pheads = [pn for pn in pheads if phase(unfi, rev(pn)) > public]
if pheads:
tr = pullop.gettransaction()
phases.advanceboundary(pullop.repo, tr, public, pheads)
# exclude changesets already draft locally and update the others
dheads = [pn for pn in dheads if phase(unfi, rev(pn)) > draft]
if dheads:
tr = pullop.gettransaction()
phases.advanceboundary(pullop.repo, tr, draft, dheads)
def _pullbookmarks(pullop):
"""process the remote bookmark information to update the local one"""
if 'bookmarks' in pullop.stepsdone:
return
pullop.stepsdone.add('bookmarks')
repo = pullop.repo
remotebookmarks = pullop.remotebookmarks
bookmod.updatefromremote(repo.ui, repo, remotebookmarks,
pullop.remote.url(),
pullop.gettransaction,
explicit=pullop.explicitbookmarks)
def _pullobsolete(pullop):
"""utility function to pull obsolete markers from a remote
The `gettransaction` is function that return the pull transaction, creating
one if necessary. We return the transaction to inform the calling code that
a new transaction have been created (when applicable).
Exists mostly to allow overriding for experimentation purpose"""
if 'obsmarkers' in pullop.stepsdone:
return
pullop.stepsdone.add('obsmarkers')
tr = None
if obsolete.isenabled(pullop.repo, obsolete.exchangeopt):
pullop.repo.ui.debug('fetching remote obsolete markers\n')
remoteobs = pullop.remote.listkeys('obsolete')
if 'dump0' in remoteobs:
tr = pullop.gettransaction()
for key in sorted(remoteobs, reverse=True):
if key.startswith('dump'):
data = base85.b85decode(remoteobs[key])
pullop.repo.obsstore.mergemarkers(tr, data)
pullop.repo.invalidatevolatilesets()
return tr
def caps20to10(repo):
"""return a set with appropriate options to use bundle20 during getbundle"""
caps = set(['HG2Y'])
capsblob = bundle2.encodecaps(bundle2.getrepocaps(repo))
caps.add('bundle2=' + urllib.quote(capsblob))
return caps
# List of names of steps to perform for a bundle2 for getbundle, order matters.
getbundle2partsorder = []
# Mapping between step name and function
#
# This exists to help extensions wrap steps if necessary
getbundle2partsmapping = {}
def getbundle2partsgenerator(stepname):
"""decorator for function generating bundle2 part for getbundle
The function is added to the step -> function mapping and appended to the
list of steps. Beware that decorated functions will be added in order
(this may matter).
You can only use this decorator for new steps, if you want to wrap a step
from an extension, attack the getbundle2partsmapping dictionary directly."""
def dec(func):
assert stepname not in getbundle2partsmapping
getbundle2partsmapping[stepname] = func
getbundle2partsorder.append(stepname)
return func
return dec
def getbundle(repo, source, heads=None, common=None, bundlecaps=None,
**kwargs):
"""return a full bundle (with potentially multiple kind of parts)
Could be a bundle HG10 or a bundle HG2Y depending on bundlecaps
passed. For now, the bundle can contain only changegroup, but this will
changes when more part type will be available for bundle2.
This is different from changegroup.getchangegroup that only returns an HG10
changegroup bundle. They may eventually get reunited in the future when we
have a clearer idea of the API we what to query different data.
The implementation is at a very early stage and will get massive rework
when the API of bundle is refined.
"""
# bundle10 case
if bundlecaps is None or 'HG2Y' not in bundlecaps:
if bundlecaps and not kwargs.get('cg', True):
raise ValueError(_('request for bundle10 must include changegroup'))
if kwargs:
raise ValueError(_('unsupported getbundle arguments: %s')
% ', '.join(sorted(kwargs.keys())))
return changegroup.getchangegroup(repo, source, heads=heads,
common=common, bundlecaps=bundlecaps)
# bundle20 case
b2caps = {}
for bcaps in bundlecaps:
if bcaps.startswith('bundle2='):
blob = urllib.unquote(bcaps[len('bundle2='):])
b2caps.update(bundle2.decodecaps(blob))
bundler = bundle2.bundle20(repo.ui, b2caps)
kwargs['heads'] = heads
kwargs['common'] = common
for name in getbundle2partsorder:
func = getbundle2partsmapping[name]
func(bundler, repo, source, bundlecaps=bundlecaps, b2caps=b2caps,
**kwargs)
return util.chunkbuffer(bundler.getchunks())
@getbundle2partsgenerator('changegroup')
def _getbundlechangegrouppart(bundler, repo, source, bundlecaps=None,
b2caps=None, heads=None, common=None, **kwargs):
"""add a changegroup part to the requested bundle"""
cg = None
if kwargs.get('cg', True):
# build changegroup bundle here.
version = None
cgversions = b2caps.get('b2x:changegroup')
if not cgversions: # 3.1 and 3.2 ship with an empty value
cg = changegroup.getchangegroupraw(repo, source, heads=heads,
common=common,
bundlecaps=bundlecaps)
else:
cgversions = [v for v in cgversions if v in changegroup.packermap]
if not cgversions:
raise ValueError(_('no common changegroup version'))
version = max(cgversions)
cg = changegroup.getchangegroupraw(repo, source, heads=heads,
common=common,
bundlecaps=bundlecaps,
version=version)
if cg:
part = bundler.newpart('b2x:changegroup', data=cg)
if version is not None:
part.addparam('version', version)
@getbundle2partsgenerator('listkeys')
def _getbundlelistkeysparts(bundler, repo, source, bundlecaps=None,
b2caps=None, **kwargs):
"""add parts containing listkeys namespaces to the requested bundle"""
listkeys = kwargs.get('listkeys', ())
for namespace in listkeys:
part = bundler.newpart('b2x:listkeys')
part.addparam('namespace', namespace)
keys = repo.listkeys(namespace).items()
part.data = pushkey.encodekeys(keys)
@getbundle2partsgenerator('obsmarkers')
def _getbundleobsmarkerpart(bundler, repo, source, bundlecaps=None,
b2caps=None, heads=None, **kwargs):
"""add an obsolescence markers part to the requested bundle"""
if kwargs.get('obsmarkers', False):
if heads is None:
heads = repo.heads()
subset = [c.node() for c in repo.set('::%ln', heads)]
markers = repo.obsstore.relevantmarkers(subset)
buildobsmarkerspart(bundler, markers)
def check_heads(repo, their_heads, context):
"""check if the heads of a repo have been modified
Used by peer for unbundling.
"""
heads = repo.heads()
heads_hash = util.sha1(''.join(sorted(heads))).digest()
if not (their_heads == ['force'] or their_heads == heads or
their_heads == ['hashed', heads_hash]):
# someone else committed/pushed/unbundled while we
# were transferring data
raise error.PushRaced('repository changed while %s - '
'please try again' % context)
def unbundle(repo, cg, heads, source, url):
"""Apply a bundle to a repo.
this function makes sure the repo is locked during the application and have
mechanism to check that no push race occurred between the creation of the
bundle and its application.
If the push was raced as PushRaced exception is raised."""
r = 0
# need a transaction when processing a bundle2 stream
tr = None
lock = repo.lock()
try:
check_heads(repo, heads, 'uploading changes')
# push can proceed
if util.safehasattr(cg, 'params'):
try:
tr = repo.transaction('unbundle')
tr.hookargs['source'] = source
tr.hookargs['url'] = url
tr.hookargs['bundle2-exp'] = '1'
r = bundle2.processbundle(repo, cg, lambda: tr).reply
p = lambda: tr.writepending() and repo.root or ""
repo.hook('b2x-pretransactionclose', throw=True, pending=p,
**tr.hookargs)
hookargs = dict(tr.hookargs)
def runhooks():
repo.hook('b2x-transactionclose', **hookargs)
tr.addpostclose('b2x-hook-transactionclose',
lambda tr: repo._afterlock(runhooks))
tr.close()
except Exception, exc:
exc.duringunbundle2 = True
raise
else:
r = changegroup.addchangegroup(repo, cg, source, url)
finally:
if tr is not None:
tr.release()
lock.release()
return r