# 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 __future__ import absolute_import
import collections
import errno
import hashlib
from .i18n import _
from .node import (
hex,
nullid,
)
from . import (
bookmarks as bookmod,
bundle2,
changegroup,
discovery,
error,
lock as lockmod,
obsolete,
phases,
pushkey,
pycompat,
scmutil,
sslutil,
streamclone,
url as urlmod,
util,
)
urlerr = util.urlerr
urlreq = util.urlreq
# Maps bundle version human names to changegroup versions.
_bundlespeccgversions = {'v1': '01',
'v2': '02',
'packed1': 's1',
'bundle2': '02', #legacy
}
# Compression engines allowed in version 1. THIS SHOULD NEVER CHANGE.
_bundlespecv1compengines = {'gzip', 'bzip2', 'none'}
def parsebundlespec(repo, spec, strict=True, externalnames=False):
"""Parse a bundle string specification into parts.
Bundle specifications denote a well-defined bundle/exchange format.
The content of a given specification should not change over time in
order to ensure that bundles produced by a newer version of Mercurial are
readable from an older version.
The string currently has the form:
<compression>-<type>[;<parameter0>[;<parameter1>]]
Where <compression> is one of the supported compression formats
and <type> is (currently) a version string. A ";" can follow the type and
all text afterwards is interpreted as URI encoded, ";" delimited key=value
pairs.
If ``strict`` is True (the default) <compression> is required. Otherwise,
it is optional.
If ``externalnames`` is False (the default), the human-centric names will
be converted to their internal representation.
Returns a 3-tuple of (compression, version, parameters). Compression will
be ``None`` if not in strict mode and a compression isn't defined.
An ``InvalidBundleSpecification`` is raised when the specification is
not syntactically well formed.
An ``UnsupportedBundleSpecification`` is raised when the compression or
bundle type/version is not recognized.
Note: this function will likely eventually return a more complex data
structure, including bundle2 part information.
"""
def parseparams(s):
if ';' not in s:
return s, {}
params = {}
version, paramstr = s.split(';', 1)
for p in paramstr.split(';'):
if '=' not in p:
raise error.InvalidBundleSpecification(
_('invalid bundle specification: '
'missing "=" in parameter: %s') % p)
key, value = p.split('=', 1)
key = urlreq.unquote(key)
value = urlreq.unquote(value)
params[key] = value
return version, params
if strict and '-' not in spec:
raise error.InvalidBundleSpecification(
_('invalid bundle specification; '
'must be prefixed with compression: %s') % spec)
if '-' in spec:
compression, version = spec.split('-', 1)
if compression not in util.compengines.supportedbundlenames:
raise error.UnsupportedBundleSpecification(
_('%s compression is not supported') % compression)
version, params = parseparams(version)
if version not in _bundlespeccgversions:
raise error.UnsupportedBundleSpecification(
_('%s is not a recognized bundle version') % version)
else:
# Value could be just the compression or just the version, in which
# case some defaults are assumed (but only when not in strict mode).
assert not strict
spec, params = parseparams(spec)
if spec in util.compengines.supportedbundlenames:
compression = spec
version = 'v1'
# Generaldelta repos require v2.
if 'generaldelta' in repo.requirements:
version = 'v2'
# Modern compression engines require v2.
if compression not in _bundlespecv1compengines:
version = 'v2'
elif spec in _bundlespeccgversions:
if spec == 'packed1':
compression = 'none'
else:
compression = 'bzip2'
version = spec
else:
raise error.UnsupportedBundleSpecification(
_('%s is not a recognized bundle specification') % spec)
# Bundle version 1 only supports a known set of compression engines.
if version == 'v1' and compression not in _bundlespecv1compengines:
raise error.UnsupportedBundleSpecification(
_('compression engine %s is not supported on v1 bundles') %
compression)
# The specification for packed1 can optionally declare the data formats
# required to apply it. If we see this metadata, compare against what the
# repo supports and error if the bundle isn't compatible.
if version == 'packed1' and 'requirements' in params:
requirements = set(params['requirements'].split(','))
missingreqs = requirements - repo.supportedformats
if missingreqs:
raise error.UnsupportedBundleSpecification(
_('missing support for repository features: %s') %
', '.join(sorted(missingreqs)))
if not externalnames:
engine = util.compengines.forbundlename(compression)
compression = engine.bundletype()[1]
version = _bundlespeccgversions[version]
return compression, version, params
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 error.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.startswith('2'):
return bundle2.getunbundler(ui, fh, magicstring=magic + version)
elif version == 'S1':
return streamclone.streamcloneapplier(fh)
else:
raise error.Abort(_('%s: unknown bundle version %s') % (fname, version))
def getbundlespec(ui, fh):
"""Infer the bundlespec from a bundle file handle.
The input file handle is seeked and the original seek position is not
restored.
"""
def speccompression(alg):
try:
return util.compengines.forbundletype(alg).bundletype()[0]
except KeyError:
return None
b = readbundle(ui, fh, None)
if isinstance(b, changegroup.cg1unpacker):
alg = b._type
if alg == '_truncatedBZ':
alg = 'BZ'
comp = speccompression(alg)
if not comp:
raise error.Abort(_('unknown compression algorithm: %s') % alg)
return '%s-v1' % comp
elif isinstance(b, bundle2.unbundle20):
if 'Compression' in b.params:
comp = speccompression(b.params['Compression'])
if not comp:
raise error.Abort(_('unknown compression algorithm: %s') % comp)
else:
comp = 'none'
version = None
for part in b.iterparts():
if part.type == 'changegroup':
version = part.params['version']
if version in ('01', '02'):
version = 'v2'
else:
raise error.Abort(_('changegroup version %s does not have '
'a known bundlespec') % version,
hint=_('try upgrading your Mercurial '
'client'))
if not version:
raise error.Abort(_('could not identify changegroup version in '
'bundle'))
return '%s-%s' % (comp, version)
elif isinstance(b, streamclone.streamcloneapplier):
requirements = streamclone.readbundle1header(fh)[2]
params = 'requirements=%s' % ','.join(sorted(requirements))
return 'none-packed1;%s' % urlreq.quote(params)
else:
raise error.Abort(_('unknown bundle type: %s') % b)
def _computeoutgoing(repo, heads, common):
"""Computes which revs are outgoing given a set of common
and a set of heads.
This is a separate function so extensions can have access to
the logic.
Returns a discovery.outgoing object.
"""
cl = repo.changelog
if common:
hasnode = cl.hasnode
common = [n for n in common if hasnode(n)]
else:
common = [nullid]
if not heads:
heads = cl.heads()
return discovery.outgoing(repo, common, heads)
def _forcebundle1(op):
"""return true if a pull/push must use bundle1
This function is used to allow testing of the older bundle version"""
ui = op.repo.ui
forcebundle1 = False
# The goal is this config is to allow developer to choose the bundle
# version used during exchanged. This is especially handy during test.
# Value is a list of bundle version to be picked from, highest version
# should be used.
#
# developer config: devel.legacy.exchange
exchange = ui.configlist('devel', 'legacy.exchange')
forcebundle1 = 'bundle2' not in exchange and 'bundle1' in exchange
return forcebundle1 or not op.remote.capable('bundle2')
class pushoperation(object):
"""A object that represent a single push operation
Its purpose is to carry push related state and very common operations.
A new pushoperation should be created at the beginning of each push and
discarded afterward.
"""
def __init__(self, repo, remote, force=False, revs=None, newbranch=False,
bookmarks=(), pushvars=None):
# 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
# 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 topological heads before the push
self.remoteheads = None
# Details of the remote branch pre and post push
#
# mapping: {'branch': ([remoteheads],
# [newheads],
# [unsyncedheads],
# [discardedheads])}
# - 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 remote heads made obsolete by the push
self.pushbranchmap = None
# testable as a boolean indicating if any nodes are missing locally.
self.incoming = None
# summary of the remote phase situation
self.remotephases = 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
# map { pushkey partid -> callback handling failure}
# used to handle exception from mandatory pushkey part failure
self.pkfailcb = {}
# an iterable of pushvars or None
self.pushvars = pushvars
@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 = 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=(),
opargs=None):
'''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()
'''
if opargs is None:
opargs = {}
pushop = pushoperation(repo, remote, force, revs, newbranch, bookmarks,
**pycompat.strkwargs(opargs))
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 error.Abort(msg)
if not pushop.remote.canpush():
raise error.Abort(_("destination does not support push"))
if not pushop.remote.capable('unbundle'):
raise error.Abort(_('cannot push: destination does not support the '
'unbundle wire protocol command'))
# get lock as we might write phase data
wlock = lock = None
try:
# bundle2 push may receive a reply bundle touching bookmarks or other
# things requiring the wlock. Take it now to ensure proper ordering.
maypushback = pushop.ui.configbool('experimental', 'bundle2.pushback')
if (not _forcebundle1(pushop)) and maypushback:
wlock = pushop.repo.wlock()
lock = pushop.repo.lock()
pushop.trmanager = transactionmanager(pushop.repo,
'push-response',
pushop.remote.url())
except IOError as err:
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)
with wlock or util.nullcontextmanager(), \
lock or util.nullcontextmanager(), \
pushop.trmanager or util.nullcontextmanager():
pushop.repo.checkpush(pushop)
_pushdiscovery(pushop)
if not _forcebundle1(pushop):
_pushbundle2(pushop)
_pushchangeset(pushop)
_pushsyncphase(pushop)
_pushobsolete(pushop)
_pushbookmark(pushop)
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')
if (pushop.ui.configbool('ui', '_usedassubrepo')
and remotephases # server supports phases
and not pushop.outgoing.missing # no changesets to be pushed
and remotephases.get('publishing', False)):
# When:
# - this is a subrepo push
# - and remote support phase
# - and no changeset are to be pushed
# - and remote is publishing
# We may be in issue 3781 case!
# We drop the possible phase synchronisation done by
# courtesy to publish changesets possibly locally draft
# on the remote.
pushop.outdatedphases = []
pushop.fallbackoutdatedphases = []
return
pushop.remotephases = phases.remotephasessummary(pushop.repo,
pushop.fallbackheads,
remotephases)
droots = pushop.remotephases.draftroots
extracond = ''
if not pushop.remotephases.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([repo._bookmarks.expandname(bookmark)
for bookmark in pushop.bookmarks])
remotebookmark = bookmod.unhexlifybookmarks(remotebookmark)
comp = bookmod.comparebookmarks(repo, repo._bookmarks, remotebookmark)
def safehex(x):
if x is None:
return x
return hex(x)
def hexifycompbookmarks(bookmarks):
for b, scid, dcid in bookmarks:
yield b, safehex(scid), safehex(dcid)
comp = [hexifycompbookmarks(marks) for marks in comp]
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 list(advdst) + list(diverge) + list(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!")
mspd = _("push includes phase-divergent changeset: %s!")
mscd = _("push includes content-divergent changeset: %s!")
mst = {"orphan": _("push includes orphan changeset: %s!"),
"phase-divergent": mspd,
"content-divergent": mscd}
# 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 error.Abort(mso % ctx)
elif ctx.isunstable():
# TODO print more than one instability in the abort
# message
raise error.Abort(mst[ctx.instabilities()[0]] % ctx)
discovery.checkheads(pushop)
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, idx=None):
"""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
if idx is None:
b2partsgenorder.append(stepname)
else:
b2partsgenorder.insert(idx, stepname)
return func
return dec
def _pushb2ctxcheckheads(pushop, bundler):
"""Generate race condition checking parts
Exists as an independent function to aid extensions
"""
# * 'force' do not check for push race,
# * if we don't push anything, there are nothing to check.
if not pushop.force and pushop.outgoing.missingheads:
allowunrelated = 'related' in bundler.capabilities.get('checkheads', ())
emptyremote = pushop.pushbranchmap is None
if not allowunrelated or emptyremote:
bundler.newpart('check:heads', data=iter(pushop.remoteheads))
else:
affected = set()
for branch, heads in pushop.pushbranchmap.iteritems():
remoteheads, newheads, unsyncedheads, discardedheads = heads
if remoteheads is not None:
remote = set(remoteheads)
affected |= set(discardedheads) & remote
affected |= remote - set(newheads)
if affected:
data = iter(sorted(affected))
bundler.newpart('check:updated-heads', data=data)
def _pushing(pushop):
"""return True if we are pushing anything"""
return bool(pushop.outgoing.missing
or pushop.outdatedphases
or pushop.outobsmarkers
or pushop.outbookmarks)
@b2partsgenerator('check-phases')
def _pushb2checkphases(pushop, bundler):
"""insert phase move checking"""
if not _pushing(pushop) or pushop.force:
return
b2caps = bundle2.bundle2caps(pushop.remote)
hasphaseheads = 'heads' in b2caps.get('phases', ())
if pushop.remotephases is not None and hasphaseheads:
# check that the remote phase has not changed
checks = [[] for p in phases.allphases]
checks[phases.public].extend(pushop.remotephases.publicheads)
checks[phases.draft].extend(pushop.remotephases.draftroots)
if any(checks):
for nodes in checks:
nodes.sort()
checkdata = phases.binaryencode(checks)
bundler.newpart('check:phases', data=checkdata)
@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)
_pushb2ctxcheckheads(pushop, bundler)
b2caps = bundle2.bundle2caps(pushop.remote)
version = '01'
cgversions = b2caps.get('changegroup')
if cgversions: # 3.1 and 3.2 ship with an empty value
cgversions = [v for v in cgversions
if v in changegroup.supportedoutgoingversions(
pushop.repo)]
if not cgversions:
raise ValueError(_('no common changegroup version'))
version = max(cgversions)
cgstream = changegroup.makestream(pushop.repo, pushop.outgoing, version,
'push')
cgpart = bundler.newpart('changegroup', data=cgstream)
if cgversions:
cgpart.addparam('version', version)
if 'treemanifest' in pushop.repo.requirements:
cgpart.addparam('treemanifest', '1')
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)
ui = pushop.repo.ui
legacyphase = 'phases' in ui.configlist('devel', 'legacy.exchange')
haspushkey = 'pushkey' in b2caps
hasphaseheads = 'heads' in b2caps.get('phases', ())
if hasphaseheads and not legacyphase:
_pushb2phaseheads(pushop, bundler)
elif haspushkey:
_pushb2phasespushkey(pushop, bundler)
def _pushb2phaseheads(pushop, bundler):
"""push phase information through a bundle2 - binary part"""
pushop.stepsdone.add('phases')
if pushop.outdatedphases:
updates = [[] for p in phases.allphases]
updates[0].extend(h.node() for h in pushop.outdatedphases)
phasedata = phases.binaryencode(updates)
bundler.newpart('phase-heads', data=phasedata)
def _pushb2phasespushkey(pushop, bundler):
"""push phase information through a bundle2 - pushkey part"""
pushop.stepsdone.add('phases')
part2node = []
def handlefailure(pushop, exc):
targetid = int(exc.partid)
for partid, node in part2node:
if partid == targetid:
raise error.Abort(_('updating %s to public failed') % node)
enc = pushkey.encode
for newremotehead in pushop.outdatedphases:
part = bundler.newpart('pushkey')
part.addparam('namespace', enc('phases'))
part.addparam('key', enc(newremotehead.hex()))
part.addparam('old', enc('%d' % phases.draft))
part.addparam('new', enc('%d' % phases.public))
part2node.append((part.id, newremotehead))
pushop.pkfailcb[part.id] = handlefailure
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:
markers = sorted(pushop.outobsmarkers)
bundle2.buildobsmarkerspart(bundler, markers)
@b2partsgenerator('bookmarks')
def _pushb2bookmarks(pushop, bundler):
"""handle bookmark push through bundle2"""
if 'bookmarks' in pushop.stepsdone:
return
b2caps = bundle2.bundle2caps(pushop.remote)
if 'pushkey' not in b2caps:
return
pushop.stepsdone.add('bookmarks')
part2book = []
enc = pushkey.encode
def handlefailure(pushop, exc):
targetid = int(exc.partid)
for partid, book, action in part2book:
if partid == targetid:
raise error.Abort(bookmsgmap[action][1].rstrip() % book)
# we should not be called for part we did not generated
assert False
for book, old, new in pushop.outbookmarks:
part = bundler.newpart('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))
pushop.pkfailcb[part.id] = handlefailure
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
@b2partsgenerator('pushvars', idx=0)
def _getbundlesendvars(pushop, bundler):
'''send shellvars via bundle2'''
pushvars = pushop.pushvars
if pushvars:
shellvars = {}
for raw in pushvars:
if '=' not in raw:
msg = ("unable to parse variable '%s', should follow "
"'KEY=VALUE' or 'KEY=' format")
raise error.Abort(msg % raw)
k, v = raw.split('=', 1)
shellvars[k] = v
part = bundler.newpart('pushvars')
for key, value in shellvars.iteritems():
part.addparam(key, value, mandatory=False)
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('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:
try:
reply = pushop.remote.unbundle(
stream, ['force'], pushop.remote.url())
except error.BundleValueError as exc:
raise error.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 as exc:
raise error.Abort(_('missing support for %s') % exc)
except bundle2.AbortFromPart as exc:
pushop.ui.status(_('remote: %s\n') % exc)
if exc.hint is not None:
pushop.ui.status(_('remote: %s\n') % ('(%s)' % exc.hint))
raise error.Abort(_('push failed on remote'))
except error.PushkeyFailed as exc:
partid = int(exc.partid)
if partid not in pushop.pkfailcb:
raise
pushop.pkfailcb[partid](pushop, 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
# Should have verified this in push().
assert pushop.remote.capable('unbundle')
pushop.repo.prepushoutgoinghooks(pushop)
outgoing = pushop.outgoing
# 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
cg = changegroup.makechangegroup(pushop.repo, outgoing, '01', 'push',
fastpath=True, bundlecaps=bundlecaps)
else:
cg = changegroup.makechangegroup(pushop.repo, outgoing, '01',
'push', bundlecaps=bundlecaps)
# apply changegroup to remote
# 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())
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')
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
repo = pushop.repo
remote = pushop.remote
pushop.stepsdone.add('obsmarkers')
if pushop.outobsmarkers:
pushop.ui.debug('try to push obsolete markers to remote\n')
rslts = []
remotedata = obsolete._pushkeyescape(sorted(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=(),
remotebookmarks=None, streamclonerequested=None):
# 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 = [repo._bookmarks.expandname(bookmark)
for bookmark in bookmarks]
# do we force pull?
self.force = force
# whether a streaming clone was requested
self.streamclonerequested = streamclonerequested
# 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 = remotebookmarks
# result of changegroup pulling (used as return code by pull)
self.cgresult = None
# list of step already done
self.stepsdone = set()
# Whether we attempted a clone from pre-generated bundles.
self.clonebundleattempted = False
@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
@util.propertycache
def canusebundle2(self):
return not _forcebundle1(self)
@util.propertycache
def remotebundle2caps(self):
return bundle2.bundle2caps(self.remote)
def gettransaction(self):
# deprecated; talk to trmanager directly
return self.trmanager.transaction()
class transactionmanager(util.transactional):
"""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:
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=(), opargs=None,
streamclonerequested=None):
"""Fetch repository data from a remote.
This is the main function used to retrieve data from a remote repository.
``repo`` is the local repository to clone into.
``remote`` is a peer instance.
``heads`` is an iterable of revisions we want to pull. ``None`` (the
default) means to pull everything from the remote.
``bookmarks`` is an iterable of bookmarks requesting to be pulled. By
default, all remote bookmarks are pulled.
``opargs`` are additional keyword arguments to pass to ``pulloperation``
initialization.
``streamclonerequested`` is a boolean indicating whether a "streaming
clone" is requested. A "streaming clone" is essentially a raw file copy
of revlogs from the server. This only works when the local repository is
empty. The default value of ``None`` means to respect the server
configuration for preferring stream clones.
Returns the ``pulloperation`` created for this pull.
"""
if opargs is None:
opargs = {}
pullop = pulloperation(repo, remote, heads, force, bookmarks=bookmarks,
streamclonerequested=streamclonerequested, **opargs)
peerlocal = pullop.remote.local()
if peerlocal:
missing = set(peerlocal.requirements) - pullop.repo.supported
if missing:
msg = _("required features are not"
" supported in the destination:"
" %s") % (', '.join(sorted(missing)))
raise error.Abort(msg)
wlock = lock = None
try:
wlock = pullop.repo.wlock()
lock = pullop.repo.lock()
pullop.trmanager = transactionmanager(repo, 'pull', remote.url())
# This should ideally be in _pullbundle2(). However, it needs to run
# before discovery to avoid extra work.
_maybeapplyclonebundle(pullop)
streamclone.maybeperformlegacystreamclone(pullop)
_pulldiscovery(pullop)
if pullop.canusebundle2:
_pullbundle2(pullop)
_pullchangeset(pullop)
_pullphase(pullop)
_pullbookmarks(pullop)
_pullobsolete(pullop)
pullop.trmanager.close()
finally:
lockmod.release(pullop.trmanager, lock, wlock)
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('b1:bookmarks')
def _pullbookmarkbundle1(pullop):
"""fetch bookmark data in bundle1 case
If not using bundle2, we have to fetch bookmarks before changeset
discovery to reduce the chance and impact of race conditions."""
if pullop.remotebookmarks is not None:
return
if pullop.canusebundle2 and 'listkeys' in pullop.remotebundle2caps:
# all known bundle2 servers now support listkeys, but lets be nice with
# new implementation.
return
pullop.remotebookmarks = pullop.remote.listkeys('bookmarks')
@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 is filtered locally, 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)
for n in rheads:
if n in nm:
if n not in scommon:
common.append(n)
if set(rheads).issubset(set(common)):
fetch = []
pullop.common = common
pullop.fetch = fetch
pullop.rheads = rheads
def _pullbundle2(pullop):
"""pull data using bundle2
For now, the only supported data are changegroup."""
kwargs = {'bundlecaps': caps20to10(pullop.repo)}
# At the moment we don't do stream clones over bundle2. If that is
# implemented then here's where the check for that will go.
streaming = False
# pulling changegroup
pullop.stepsdone.add('changegroup')
kwargs['common'] = pullop.common
kwargs['heads'] = pullop.heads or pullop.rheads
kwargs['cg'] = pullop.fetch
ui = pullop.repo.ui
legacyphase = 'phases' in ui.configlist('devel', 'legacy.exchange')
hasbinaryphase = 'heads' in pullop.remotebundle2caps.get('phases', ())
if (not legacyphase and hasbinaryphase):
kwargs['phases'] = True
pullop.stepsdone.add('phases')
if 'listkeys' in pullop.remotebundle2caps:
if 'phases' not in pullop.stepsdone:
kwargs['listkeys'] = ['phases']
if pullop.remotebookmarks is None:
# make sure to always includes bookmark data when migrating
# `hg incoming --bundle` to using this function.
kwargs.setdefault('listkeys', []).append('bookmarks')
# If this is a full pull / clone and the server supports the clone bundles
# feature, tell the server whether we attempted a clone bundle. The
# presence of this flag indicates the client supports clone bundles. This
# will enable the server to treat clients that support clone bundles
# differently from those that don't.
if (pullop.remote.capable('clonebundles')
and pullop.heads is None and list(pullop.common) == [nullid]):
kwargs['cbattempted'] = pullop.clonebundleattempted
if streaming:
pullop.repo.ui.status(_('streaming all changes\n'))
elif 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(pullop.remotebundle2caps)
if obsolete.commonversion(remoteversions) is not None:
kwargs['obsmarkers'] = True
pullop.stepsdone.add('obsmarkers')
_pullbundle2extraprepare(pullop, kwargs)
bundle = pullop.remote.getbundle('pull', **pycompat.strkwargs(kwargs))
try:
op = bundle2.processbundle(pullop.repo, bundle, pullop.gettransaction)
except bundle2.AbortFromPart as exc:
pullop.repo.ui.status(_('remote: abort: %s\n') % exc)
raise error.Abort(_('pull failed on remote'), hint=exc.hint)
except error.BundleValueError as exc:
raise error.Abort(_('missing support for %s') % exc)
if pullop.fetch:
pullop.cgresult = bundle2.combinechangegroupresults(op)
# 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
# bookmark data were either already there or pulled in the bundle
if pullop.remotebookmarks is not None:
_pullbookmarks(pullop)
def _pullbundle2extraprepare(pullop, kwargs):
"""hook function so that extensions can extend the getbundle call"""
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
tr = 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 error.Abort(_("partial pull cannot be done because "
"other repository doesn't support "
"changegroupsubset."))
else:
cg = pullop.remote.changegroupsubset(pullop.fetch, pullop.heads, 'pull')
bundleop = bundle2.applybundle(pullop.repo, cg, tr, 'pull',
pullop.remote.url())
pullop.cgresult = bundle2.combinechangegroupresults(bundleop)
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 non-publishing
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
remotebookmarks = bookmod.unhexlifybookmarks(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()
markers = []
for key in sorted(remoteobs, reverse=True):
if key.startswith('dump'):
data = util.b85decode(remoteobs[key])
version, newmarks = obsolete._readmarkers(data)
markers += newmarks
if markers:
pullop.repo.obsstore.add(tr, markers)
pullop.repo.invalidatevolatilesets()
return tr
def caps20to10(repo):
"""return a set with appropriate options to use bundle20 during getbundle"""
caps = {'HG20'}
capsblob = bundle2.encodecaps(bundle2.getrepocaps(repo))
caps.add('bundle2=' + urlreq.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, idx=None):
"""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
if idx is None:
getbundle2partsorder.append(stepname)
else:
getbundle2partsorder.insert(idx, stepname)
return func
return dec
def bundle2requested(bundlecaps):
if bundlecaps is not None:
return any(cap.startswith('HG2') for cap in bundlecaps)
return False
def getbundlechunks(repo, source, heads=None, common=None, bundlecaps=None,
**kwargs):
"""Return chunks constituting a bundle's raw data.
Could be a bundle HG10 or a bundle HG20 depending on bundlecaps
passed.
Returns an iterator over raw chunks (of varying sizes).
"""
kwargs = pycompat.byteskwargs(kwargs)
usebundle2 = bundle2requested(bundlecaps)
# bundle10 case
if not usebundle2:
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())))
outgoing = _computeoutgoing(repo, heads, common)
return changegroup.makestream(repo, outgoing, '01', source,
bundlecaps=bundlecaps)
# bundle20 case
b2caps = {}
for bcaps in bundlecaps:
if bcaps.startswith('bundle2='):
blob = urlreq.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,
**pycompat.strkwargs(kwargs))
return 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"""
cgstream = None
if kwargs.get('cg', True):
# build changegroup bundle here.
version = '01'
cgversions = b2caps.get('changegroup')
if cgversions: # 3.1 and 3.2 ship with an empty value
cgversions = [v for v in cgversions
if v in changegroup.supportedoutgoingversions(repo)]
if not cgversions:
raise ValueError(_('no common changegroup version'))
version = max(cgversions)
outgoing = _computeoutgoing(repo, heads, common)
if outgoing.missing:
cgstream = changegroup.makestream(repo, outgoing, version, source,
bundlecaps=bundlecaps)
if cgstream:
part = bundler.newpart('changegroup', data=cgstream)
if cgversions:
part.addparam('version', version)
part.addparam('nbchanges', '%d' % len(outgoing.missing),
mandatory=False)
if 'treemanifest' in repo.requirements:
part.addparam('treemanifest', '1')
@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('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)
markers = sorted(markers)
bundle2.buildobsmarkerspart(bundler, markers)
@getbundle2partsgenerator('phases')
def _getbundlephasespart(bundler, repo, source, bundlecaps=None,
b2caps=None, heads=None, **kwargs):
"""add phase heads part to the requested bundle"""
if kwargs.get('phases', False):
if not 'heads' in b2caps.get('phases'):
raise ValueError(_('no common phases exchange method'))
if heads is None:
heads = repo.heads()
headsbyphase = collections.defaultdict(set)
if repo.publishing():
headsbyphase[phases.public] = heads
else:
# find the appropriate heads to move
phase = repo._phasecache.phase
node = repo.changelog.node
rev = repo.changelog.rev
for h in heads:
headsbyphase[phase(repo, rev(h))].add(h)
seenphases = list(headsbyphase.keys())
# We do not handle anything but public and draft phase for now)
if seenphases:
assert max(seenphases) <= phases.draft
# if client is pulling non-public changesets, we need to find
# intermediate public heads.
draftheads = headsbyphase.get(phases.draft, set())
if draftheads:
publicheads = headsbyphase.get(phases.public, set())
revset = 'heads(only(%ln, %ln) and public())'
extraheads = repo.revs(revset, draftheads, publicheads)
for r in extraheads:
headsbyphase[phases.public].add(node(r))
# transform data in a format used by the encoding function
phasemapping = []
for phase in phases.allphases:
phasemapping.append(sorted(headsbyphase[phase]))
# generate the actual part
phasedata = phases.binaryencode(phasemapping)
bundler.newpart('phase-heads', data=phasedata)
@getbundle2partsgenerator('hgtagsfnodes')
def _getbundletagsfnodes(bundler, repo, source, bundlecaps=None,
b2caps=None, heads=None, common=None,
**kwargs):
"""Transfer the .hgtags filenodes mapping.
Only values for heads in this bundle will be transferred.
The part data consists of pairs of 20 byte changeset node and .hgtags
filenodes raw values.
"""
# Don't send unless:
# - changeset are being exchanged,
# - the client supports it.
if not (kwargs.get('cg', True) and 'hgtagsfnodes' in b2caps):
return
outgoing = _computeoutgoing(repo, heads, common)
bundle2.addparttagsfnodescache(repo, bundler, outgoing)
def _getbookmarks(repo, **kwargs):
"""Returns bookmark to node mapping.
This function is primarily used to generate `bookmarks` bundle2 part.
It is a separate function in order to make it easy to wrap it
in extensions. Passing `kwargs` to the function makes it easy to
add new parameters in extensions.
"""
return dict(bookmod.listbinbookmarks(repo))
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 = hashlib.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
# [wlock, lock, tr] - needs to be an array so nested functions can modify it
lockandtr = [None, None, None]
recordout = None
# quick fix for output mismatch with bundle2 in 3.4
captureoutput = repo.ui.configbool('experimental', 'bundle2-output-capture')
if url.startswith('remote:http:') or url.startswith('remote:https:'):
captureoutput = True
try:
# note: outside bundle1, 'heads' is expected to be empty and this
# 'check_heads' call wil be a no-op
check_heads(repo, heads, 'uploading changes')
# push can proceed
if not isinstance(cg, bundle2.unbundle20):
# legacy case: bundle1 (changegroup 01)
txnname = "\n".join([source, util.hidepassword(url)])
with repo.lock(), repo.transaction(txnname) as tr:
op = bundle2.applybundle(repo, cg, tr, source, url)
r = bundle2.combinechangegroupresults(op)
else:
r = None
try:
def gettransaction():
if not lockandtr[2]:
lockandtr[0] = repo.wlock()
lockandtr[1] = repo.lock()
lockandtr[2] = repo.transaction(source)
lockandtr[2].hookargs['source'] = source
lockandtr[2].hookargs['url'] = url
lockandtr[2].hookargs['bundle2'] = '1'
return lockandtr[2]
# Do greedy locking by default until we're satisfied with lazy
# locking.
if not repo.ui.configbool('experimental', 'bundle2lazylocking'):
gettransaction()
op = bundle2.bundleoperation(repo, gettransaction,
captureoutput=captureoutput)
try:
op = bundle2.processbundle(repo, cg, op=op)
finally:
r = op.reply
if captureoutput and r is not None:
repo.ui.pushbuffer(error=True, subproc=True)
def recordout(output):
r.newpart('output', data=output, mandatory=False)
if lockandtr[2] is not None:
lockandtr[2].close()
except BaseException as exc:
exc.duringunbundle2 = True
if captureoutput and r is not None:
parts = exc._bundle2salvagedoutput = r.salvageoutput()
def recordout(output):
part = bundle2.bundlepart('output', data=output,
mandatory=False)
parts.append(part)
raise
finally:
lockmod.release(lockandtr[2], lockandtr[1], lockandtr[0])
if recordout is not None:
recordout(repo.ui.popbuffer())
return r
def _maybeapplyclonebundle(pullop):
"""Apply a clone bundle from a remote, if possible."""
repo = pullop.repo
remote = pullop.remote
if not repo.ui.configbool('ui', 'clonebundles'):
return
# Only run if local repo is empty.
if len(repo):
return
if pullop.heads:
return
if not remote.capable('clonebundles'):
return
res = remote._call('clonebundles')
# If we call the wire protocol command, that's good enough to record the
# attempt.
pullop.clonebundleattempted = True
entries = parseclonebundlesmanifest(repo, res)
if not entries:
repo.ui.note(_('no clone bundles available on remote; '
'falling back to regular clone\n'))
return
entries = filterclonebundleentries(
repo, entries, streamclonerequested=pullop.streamclonerequested)
if not entries:
# There is a thundering herd concern here. However, if a server
# operator doesn't advertise bundles appropriate for its clients,
# they deserve what's coming. Furthermore, from a client's
# perspective, no automatic fallback would mean not being able to
# clone!
repo.ui.warn(_('no compatible clone bundles available on server; '
'falling back to regular clone\n'))
repo.ui.warn(_('(you may want to report this to the server '
'operator)\n'))
return
entries = sortclonebundleentries(repo.ui, entries)
url = entries[0]['URL']
repo.ui.status(_('applying clone bundle from %s\n') % url)
if trypullbundlefromurl(repo.ui, repo, url):
repo.ui.status(_('finished applying clone bundle\n'))
# Bundle failed.
#
# We abort by default to avoid the thundering herd of
# clients flooding a server that was expecting expensive
# clone load to be offloaded.
elif repo.ui.configbool('ui', 'clonebundlefallback'):
repo.ui.warn(_('falling back to normal clone\n'))
else:
raise error.Abort(_('error applying bundle'),
hint=_('if this error persists, consider contacting '
'the server operator or disable clone '
'bundles via '
'"--config ui.clonebundles=false"'))
def parseclonebundlesmanifest(repo, s):
"""Parses the raw text of a clone bundles manifest.
Returns a list of dicts. The dicts have a ``URL`` key corresponding
to the URL and other keys are the attributes for the entry.
"""
m = []
for line in s.splitlines():
fields = line.split()
if not fields:
continue
attrs = {'URL': fields[0]}
for rawattr in fields[1:]:
key, value = rawattr.split('=', 1)
key = urlreq.unquote(key)
value = urlreq.unquote(value)
attrs[key] = value
# Parse BUNDLESPEC into components. This makes client-side
# preferences easier to specify since you can prefer a single
# component of the BUNDLESPEC.
if key == 'BUNDLESPEC':
try:
comp, version, params = parsebundlespec(repo, value,
externalnames=True)
attrs['COMPRESSION'] = comp
attrs['VERSION'] = version
except error.InvalidBundleSpecification:
pass
except error.UnsupportedBundleSpecification:
pass
m.append(attrs)
return m
def filterclonebundleentries(repo, entries, streamclonerequested=False):
"""Remove incompatible clone bundle manifest entries.
Accepts a list of entries parsed with ``parseclonebundlesmanifest``
and returns a new list consisting of only the entries that this client
should be able to apply.
There is no guarantee we'll be able to apply all returned entries because
the metadata we use to filter on may be missing or wrong.
"""
newentries = []
for entry in entries:
spec = entry.get('BUNDLESPEC')
if spec:
try:
comp, version, params = parsebundlespec(repo, spec, strict=True)
# If a stream clone was requested, filter out non-streamclone
# entries.
if streamclonerequested and (comp != 'UN' or version != 's1'):
repo.ui.debug('filtering %s because not a stream clone\n' %
entry['URL'])
continue
except error.InvalidBundleSpecification as e:
repo.ui.debug(str(e) + '\n')
continue
except error.UnsupportedBundleSpecification as e:
repo.ui.debug('filtering %s because unsupported bundle '
'spec: %s\n' % (entry['URL'], str(e)))
continue
# If we don't have a spec and requested a stream clone, we don't know
# what the entry is so don't attempt to apply it.
elif streamclonerequested:
repo.ui.debug('filtering %s because cannot determine if a stream '
'clone bundle\n' % entry['URL'])
continue
if 'REQUIRESNI' in entry and not sslutil.hassni:
repo.ui.debug('filtering %s because SNI not supported\n' %
entry['URL'])
continue
newentries.append(entry)
return newentries
class clonebundleentry(object):
"""Represents an item in a clone bundles manifest.
This rich class is needed to support sorting since sorted() in Python 3
doesn't support ``cmp`` and our comparison is complex enough that ``key=``
won't work.
"""
def __init__(self, value, prefers):
self.value = value
self.prefers = prefers
def _cmp(self, other):
for prefkey, prefvalue in self.prefers:
avalue = self.value.get(prefkey)
bvalue = other.value.get(prefkey)
# Special case for b missing attribute and a matches exactly.
if avalue is not None and bvalue is None and avalue == prefvalue:
return -1
# Special case for a missing attribute and b matches exactly.
if bvalue is not None and avalue is None and bvalue == prefvalue:
return 1
# We can't compare unless attribute present on both.
if avalue is None or bvalue is None:
continue
# Same values should fall back to next attribute.
if avalue == bvalue:
continue
# Exact matches come first.
if avalue == prefvalue:
return -1
if bvalue == prefvalue:
return 1
# Fall back to next attribute.
continue
# If we got here we couldn't sort by attributes and prefers. Fall
# back to index order.
return 0
def __lt__(self, other):
return self._cmp(other) < 0
def __gt__(self, other):
return self._cmp(other) > 0
def __eq__(self, other):
return self._cmp(other) == 0
def __le__(self, other):
return self._cmp(other) <= 0
def __ge__(self, other):
return self._cmp(other) >= 0
def __ne__(self, other):
return self._cmp(other) != 0
def sortclonebundleentries(ui, entries):
prefers = ui.configlist('ui', 'clonebundleprefers')
if not prefers:
return list(entries)
prefers = [p.split('=', 1) for p in prefers]
items = sorted(clonebundleentry(v, prefers) for v in entries)
return [i.value for i in items]
def trypullbundlefromurl(ui, repo, url):
"""Attempt to apply a bundle from a URL."""
with repo.lock(), repo.transaction('bundleurl') as tr:
try:
fh = urlmod.open(ui, url)
cg = readbundle(ui, fh, 'stream')
if isinstance(cg, streamclone.streamcloneapplier):
cg.apply(repo)
else:
bundle2.applybundle(repo, cg, tr, 'clonebundles', url)
return True
except urlerr.httperror as e:
ui.warn(_('HTTP error fetching bundle: %s\n') % str(e))
except urlerr.urlerror as e:
ui.warn(_('error fetching bundle: %s\n') % e.reason)
return False