localrepo: move some vfs initialization out of __init__
In order to make repository types more dynamic, we'll need to move the
logic for determining repository behavior out of
localrepository.__init__ so we can influence behavior before the type
is instantiated.
This commit starts that process by moving working directory and .hg/
vfs initialization to our new standalone function for instantiating
local repositories.
Aside from API changes, behavior should be fully backwards compatible.
.. api::
localrepository.__init__ now does less work and accepts new args
Use ``hg.repository()``, ``localrepo.instance()``, or
``localrepo.makelocalrepository()`` to obtain a new local repository
instance instead of calling the ``localrepository`` constructor
directly.
Differential Revision: https://phab.mercurial-scm.org/D4564
# localrepo.py - read/write repository class for mercurial
#
# 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 errno
import hashlib
import os
import random
import sys
import time
import weakref
from .i18n import _
from .node import (
hex,
nullid,
short,
)
from . import (
bookmarks,
branchmap,
bundle2,
changegroup,
changelog,
color,
context,
dirstate,
dirstateguard,
discovery,
encoding,
error,
exchange,
extensions,
filelog,
hook,
lock as lockmod,
manifest,
match as matchmod,
merge as mergemod,
mergeutil,
namespaces,
narrowspec,
obsolete,
pathutil,
phases,
pushkey,
pycompat,
repository,
repoview,
revset,
revsetlang,
scmutil,
sparse,
store,
subrepoutil,
tags as tagsmod,
transaction,
txnutil,
util,
vfs as vfsmod,
)
from .utils import (
interfaceutil,
procutil,
stringutil,
)
from .revlogutils import (
constants as revlogconst,
)
release = lockmod.release
urlerr = util.urlerr
urlreq = util.urlreq
# set of (path, vfs-location) tuples. vfs-location is:
# - 'plain for vfs relative paths
# - '' for svfs relative paths
_cachedfiles = set()
class _basefilecache(scmutil.filecache):
"""All filecache usage on repo are done for logic that should be unfiltered
"""
def __get__(self, repo, type=None):
if repo is None:
return self
return super(_basefilecache, self).__get__(repo.unfiltered(), type)
def __set__(self, repo, value):
return super(_basefilecache, self).__set__(repo.unfiltered(), value)
def __delete__(self, repo):
return super(_basefilecache, self).__delete__(repo.unfiltered())
class repofilecache(_basefilecache):
"""filecache for files in .hg but outside of .hg/store"""
def __init__(self, *paths):
super(repofilecache, self).__init__(*paths)
for path in paths:
_cachedfiles.add((path, 'plain'))
def join(self, obj, fname):
return obj.vfs.join(fname)
class storecache(_basefilecache):
"""filecache for files in the store"""
def __init__(self, *paths):
super(storecache, self).__init__(*paths)
for path in paths:
_cachedfiles.add((path, ''))
def join(self, obj, fname):
return obj.sjoin(fname)
def isfilecached(repo, name):
"""check if a repo has already cached "name" filecache-ed property
This returns (cachedobj-or-None, iscached) tuple.
"""
cacheentry = repo.unfiltered()._filecache.get(name, None)
if not cacheentry:
return None, False
return cacheentry.obj, True
class unfilteredpropertycache(util.propertycache):
"""propertycache that apply to unfiltered repo only"""
def __get__(self, repo, type=None):
unfi = repo.unfiltered()
if unfi is repo:
return super(unfilteredpropertycache, self).__get__(unfi)
return getattr(unfi, self.name)
class filteredpropertycache(util.propertycache):
"""propertycache that must take filtering in account"""
def cachevalue(self, obj, value):
object.__setattr__(obj, self.name, value)
def hasunfilteredcache(repo, name):
"""check if a repo has an unfilteredpropertycache value for <name>"""
return name in vars(repo.unfiltered())
def unfilteredmethod(orig):
"""decorate method that always need to be run on unfiltered version"""
def wrapper(repo, *args, **kwargs):
return orig(repo.unfiltered(), *args, **kwargs)
return wrapper
moderncaps = {'lookup', 'branchmap', 'pushkey', 'known', 'getbundle',
'unbundle'}
legacycaps = moderncaps.union({'changegroupsubset'})
@interfaceutil.implementer(repository.ipeercommandexecutor)
class localcommandexecutor(object):
def __init__(self, peer):
self._peer = peer
self._sent = False
self._closed = False
def __enter__(self):
return self
def __exit__(self, exctype, excvalue, exctb):
self.close()
def callcommand(self, command, args):
if self._sent:
raise error.ProgrammingError('callcommand() cannot be used after '
'sendcommands()')
if self._closed:
raise error.ProgrammingError('callcommand() cannot be used after '
'close()')
# We don't need to support anything fancy. Just call the named
# method on the peer and return a resolved future.
fn = getattr(self._peer, pycompat.sysstr(command))
f = pycompat.futures.Future()
try:
result = fn(**pycompat.strkwargs(args))
except Exception:
pycompat.future_set_exception_info(f, sys.exc_info()[1:])
else:
f.set_result(result)
return f
def sendcommands(self):
self._sent = True
def close(self):
self._closed = True
@interfaceutil.implementer(repository.ipeercommands)
class localpeer(repository.peer):
'''peer for a local repo; reflects only the most recent API'''
def __init__(self, repo, caps=None):
super(localpeer, self).__init__()
if caps is None:
caps = moderncaps.copy()
self._repo = repo.filtered('served')
self.ui = repo.ui
self._caps = repo._restrictcapabilities(caps)
# Begin of _basepeer interface.
def url(self):
return self._repo.url()
def local(self):
return self._repo
def peer(self):
return self
def canpush(self):
return True
def close(self):
self._repo.close()
# End of _basepeer interface.
# Begin of _basewirecommands interface.
def branchmap(self):
return self._repo.branchmap()
def capabilities(self):
return self._caps
def clonebundles(self):
return self._repo.tryread('clonebundles.manifest')
def debugwireargs(self, one, two, three=None, four=None, five=None):
"""Used to test argument passing over the wire"""
return "%s %s %s %s %s" % (one, two, pycompat.bytestr(three),
pycompat.bytestr(four),
pycompat.bytestr(five))
def getbundle(self, source, heads=None, common=None, bundlecaps=None,
**kwargs):
chunks = exchange.getbundlechunks(self._repo, source, heads=heads,
common=common, bundlecaps=bundlecaps,
**kwargs)[1]
cb = util.chunkbuffer(chunks)
if exchange.bundle2requested(bundlecaps):
# When requesting a bundle2, getbundle returns a stream to make the
# wire level function happier. We need to build a proper object
# from it in local peer.
return bundle2.getunbundler(self.ui, cb)
else:
return changegroup.getunbundler('01', cb, None)
def heads(self):
return self._repo.heads()
def known(self, nodes):
return self._repo.known(nodes)
def listkeys(self, namespace):
return self._repo.listkeys(namespace)
def lookup(self, key):
return self._repo.lookup(key)
def pushkey(self, namespace, key, old, new):
return self._repo.pushkey(namespace, key, old, new)
def stream_out(self):
raise error.Abort(_('cannot perform stream clone against local '
'peer'))
def unbundle(self, bundle, heads, url):
"""apply a bundle on a repo
This function handles the repo locking itself."""
try:
try:
bundle = exchange.readbundle(self.ui, bundle, None)
ret = exchange.unbundle(self._repo, bundle, heads, 'push', url)
if util.safehasattr(ret, 'getchunks'):
# This is a bundle20 object, turn it into an unbundler.
# This little dance should be dropped eventually when the
# API is finally improved.
stream = util.chunkbuffer(ret.getchunks())
ret = bundle2.getunbundler(self.ui, stream)
return ret
except Exception as exc:
# If the exception contains output salvaged from a bundle2
# reply, we need to make sure it is printed before continuing
# to fail. So we build a bundle2 with such output and consume
# it directly.
#
# This is not very elegant but allows a "simple" solution for
# issue4594
output = getattr(exc, '_bundle2salvagedoutput', ())
if output:
bundler = bundle2.bundle20(self._repo.ui)
for out in output:
bundler.addpart(out)
stream = util.chunkbuffer(bundler.getchunks())
b = bundle2.getunbundler(self.ui, stream)
bundle2.processbundle(self._repo, b)
raise
except error.PushRaced as exc:
raise error.ResponseError(_('push failed:'),
stringutil.forcebytestr(exc))
# End of _basewirecommands interface.
# Begin of peer interface.
def commandexecutor(self):
return localcommandexecutor(self)
# End of peer interface.
@interfaceutil.implementer(repository.ipeerlegacycommands)
class locallegacypeer(localpeer):
'''peer extension which implements legacy methods too; used for tests with
restricted capabilities'''
def __init__(self, repo):
super(locallegacypeer, self).__init__(repo, caps=legacycaps)
# Begin of baselegacywirecommands interface.
def between(self, pairs):
return self._repo.between(pairs)
def branches(self, nodes):
return self._repo.branches(nodes)
def changegroup(self, nodes, source):
outgoing = discovery.outgoing(self._repo, missingroots=nodes,
missingheads=self._repo.heads())
return changegroup.makechangegroup(self._repo, outgoing, '01', source)
def changegroupsubset(self, bases, heads, source):
outgoing = discovery.outgoing(self._repo, missingroots=bases,
missingheads=heads)
return changegroup.makechangegroup(self._repo, outgoing, '01', source)
# End of baselegacywirecommands interface.
# Increment the sub-version when the revlog v2 format changes to lock out old
# clients.
REVLOGV2_REQUIREMENT = 'exp-revlogv2.0'
# A repository with the sparserevlog feature will have delta chains that
# can spread over a larger span. Sparse reading cuts these large spans into
# pieces, so that each piece isn't too big.
# Without the sparserevlog capability, reading from the repository could use
# huge amounts of memory, because the whole span would be read at once,
# including all the intermediate revisions that aren't pertinent for the chain.
# This is why once a repository has enabled sparse-read, it becomes required.
SPARSEREVLOG_REQUIREMENT = 'sparserevlog'
# Functions receiving (ui, features) that extensions can register to impact
# the ability to load repositories with custom requirements. Only
# functions defined in loaded extensions are called.
#
# The function receives a set of requirement strings that the repository
# is capable of opening. Functions will typically add elements to the
# set to reflect that the extension knows how to handle that requirements.
featuresetupfuncs = set()
def makelocalrepository(ui, path, intents=None):
"""Create a local repository object.
Given arguments needed to construct a local repository, this function
derives a type suitable for representing that repository and returns an
instance of it.
The returned object conforms to the ``repository.completelocalrepository``
interface.
"""
# Working directory VFS rooted at repository root.
wdirvfs = vfsmod.vfs(path, expandpath=True, realpath=True)
# Main VFS for .hg/ directory.
hgpath = wdirvfs.join(b'.hg')
hgvfs = vfsmod.vfs(hgpath, cacheaudited=True)
return localrepository(
ui, path,
wdirvfs=wdirvfs,
hgvfs=hgvfs,
intents=intents)
@interfaceutil.implementer(repository.completelocalrepository)
class localrepository(object):
# obsolete experimental requirements:
# - manifestv2: An experimental new manifest format that allowed
# for stem compression of long paths. Experiment ended up not
# being successful (repository sizes went up due to worse delta
# chains), and the code was deleted in 4.6.
supportedformats = {
'revlogv1',
'generaldelta',
'treemanifest',
REVLOGV2_REQUIREMENT,
SPARSEREVLOG_REQUIREMENT,
}
_basesupported = supportedformats | {
'store',
'fncache',
'shared',
'relshared',
'dotencode',
'exp-sparse',
'internal-phase'
}
openerreqs = {
'revlogv1',
'generaldelta',
'treemanifest',
}
# list of prefix for file which can be written without 'wlock'
# Extensions should extend this list when needed
_wlockfreeprefix = {
# We migh consider requiring 'wlock' for the next
# two, but pretty much all the existing code assume
# wlock is not needed so we keep them excluded for
# now.
'hgrc',
'requires',
# XXX cache is a complicatged business someone
# should investigate this in depth at some point
'cache/',
# XXX shouldn't be dirstate covered by the wlock?
'dirstate',
# XXX bisect was still a bit too messy at the time
# this changeset was introduced. Someone should fix
# the remainig bit and drop this line
'bisect.state',
}
def __init__(self, baseui, origroot, wdirvfs, hgvfs, intents=None):
"""Create a new local repository instance.
Most callers should use ``hg.repository()``, ``localrepo.instance()``,
or ``localrepo.makelocalrepository()`` for obtaining a new repository
object.
Arguments:
baseui
``ui.ui`` instance to use. A copy will be made (since new config
options may be loaded into it).
origroot
``bytes`` path to working directory root of this repository.
wdirvfs
``vfs.vfs`` rooted at the working directory.
hgvfs
``vfs.vfs`` rooted at .hg/
intents
``set`` of system strings indicating what this repo will be used
for.
"""
self.baseui = baseui
self.ui = baseui.copy()
self.ui.copy = baseui.copy # prevent copying repo configuration
self.origroot = origroot
# vfs rooted at working directory.
self.wvfs = wdirvfs
self.root = wdirvfs.base
# vfs rooted at .hg/. Used to access most non-store paths.
self.vfs = hgvfs
self.path = hgvfs.base
self.requirements = set()
self.filtername = None
# svfs: usually rooted at .hg/store, used to access repository history
# If this is a shared repository, this vfs may point to another
# repository's .hg/store directory.
self.svfs = None
if (self.ui.configbool('devel', 'all-warnings') or
self.ui.configbool('devel', 'check-locks')):
self.vfs.audit = self._getvfsward(self.vfs.audit)
# A list of callback to shape the phase if no data were found.
# Callback are in the form: func(repo, roots) --> processed root.
# This list it to be filled by extension during repo setup
self._phasedefaults = []
try:
self.ui.readconfig(self.vfs.join("hgrc"), self.root)
self._loadextensions()
except IOError:
pass
if featuresetupfuncs:
self.supported = set(self._basesupported) # use private copy
extmods = set(m.__name__ for n, m
in extensions.extensions(self.ui))
for setupfunc in featuresetupfuncs:
if setupfunc.__module__ in extmods:
setupfunc(self.ui, self.supported)
else:
self.supported = self._basesupported
color.setup(self.ui)
# Add compression engines.
for name in util.compengines:
engine = util.compengines[name]
if engine.revlogheader():
self.supported.add('exp-compression-%s' % name)
if not self.vfs.isdir():
try:
self.vfs.stat()
except OSError as inst:
if inst.errno != errno.ENOENT:
raise
raise error.RepoError(_("repository %s not found") % origroot)
else:
try:
self.requirements = scmutil.readrequires(
self.vfs, self.supported)
except IOError as inst:
if inst.errno != errno.ENOENT:
raise
cachepath = self.vfs.join('cache')
self.sharedpath = self.path
try:
sharedpath = self.vfs.read("sharedpath").rstrip('\n')
if 'relshared' in self.requirements:
sharedpath = self.vfs.join(sharedpath)
vfs = vfsmod.vfs(sharedpath, realpath=True)
cachepath = vfs.join('cache')
s = vfs.base
if not vfs.exists():
raise error.RepoError(
_('.hg/sharedpath points to nonexistent directory %s') % s)
self.sharedpath = s
except IOError as inst:
if inst.errno != errno.ENOENT:
raise
if 'exp-sparse' in self.requirements and not sparse.enabled:
raise error.RepoError(_('repository is using sparse feature but '
'sparse is not enabled; enable the '
'"sparse" extensions to access'))
self.store = store.store(
self.requirements, self.sharedpath,
lambda base: vfsmod.vfs(base, cacheaudited=True))
self.spath = self.store.path
self.svfs = self.store.vfs
self.sjoin = self.store.join
self.vfs.createmode = self.store.createmode
self.cachevfs = vfsmod.vfs(cachepath, cacheaudited=True)
self.cachevfs.createmode = self.store.createmode
if (self.ui.configbool('devel', 'all-warnings') or
self.ui.configbool('devel', 'check-locks')):
if util.safehasattr(self.svfs, 'vfs'): # this is filtervfs
self.svfs.vfs.audit = self._getsvfsward(self.svfs.vfs.audit)
else: # standard vfs
self.svfs.audit = self._getsvfsward(self.svfs.audit)
self._applyopenerreqs()
self._dirstatevalidatewarned = False
self._branchcaches = {}
self._revbranchcache = None
self._filterpats = {}
self._datafilters = {}
self._transref = self._lockref = self._wlockref = None
# A cache for various files under .hg/ that tracks file changes,
# (used by the filecache decorator)
#
# Maps a property name to its util.filecacheentry
self._filecache = {}
# hold sets of revision to be filtered
# should be cleared when something might have changed the filter value:
# - new changesets,
# - phase change,
# - new obsolescence marker,
# - working directory parent change,
# - bookmark changes
self.filteredrevcache = {}
# post-dirstate-status hooks
self._postdsstatus = []
# generic mapping between names and nodes
self.names = namespaces.namespaces()
# Key to signature value.
self._sparsesignaturecache = {}
# Signature to cached matcher instance.
self._sparsematchercache = {}
def _getvfsward(self, origfunc):
"""build a ward for self.vfs"""
rref = weakref.ref(self)
def checkvfs(path, mode=None):
ret = origfunc(path, mode=mode)
repo = rref()
if (repo is None
or not util.safehasattr(repo, '_wlockref')
or not util.safehasattr(repo, '_lockref')):
return
if mode in (None, 'r', 'rb'):
return
if path.startswith(repo.path):
# truncate name relative to the repository (.hg)
path = path[len(repo.path) + 1:]
if path.startswith('cache/'):
msg = 'accessing cache with vfs instead of cachevfs: "%s"'
repo.ui.develwarn(msg % path, stacklevel=2, config="cache-vfs")
if path.startswith('journal.'):
# journal is covered by 'lock'
if repo._currentlock(repo._lockref) is None:
repo.ui.develwarn('write with no lock: "%s"' % path,
stacklevel=2, config='check-locks')
elif repo._currentlock(repo._wlockref) is None:
# rest of vfs files are covered by 'wlock'
#
# exclude special files
for prefix in self._wlockfreeprefix:
if path.startswith(prefix):
return
repo.ui.develwarn('write with no wlock: "%s"' % path,
stacklevel=2, config='check-locks')
return ret
return checkvfs
def _getsvfsward(self, origfunc):
"""build a ward for self.svfs"""
rref = weakref.ref(self)
def checksvfs(path, mode=None):
ret = origfunc(path, mode=mode)
repo = rref()
if repo is None or not util.safehasattr(repo, '_lockref'):
return
if mode in (None, 'r', 'rb'):
return
if path.startswith(repo.sharedpath):
# truncate name relative to the repository (.hg)
path = path[len(repo.sharedpath) + 1:]
if repo._currentlock(repo._lockref) is None:
repo.ui.develwarn('write with no lock: "%s"' % path,
stacklevel=3)
return ret
return checksvfs
def close(self):
self._writecaches()
def _loadextensions(self):
extensions.loadall(self.ui)
def _writecaches(self):
if self._revbranchcache:
self._revbranchcache.write()
def _restrictcapabilities(self, caps):
if self.ui.configbool('experimental', 'bundle2-advertise'):
caps = set(caps)
capsblob = bundle2.encodecaps(bundle2.getrepocaps(self,
role='client'))
caps.add('bundle2=' + urlreq.quote(capsblob))
return caps
def _applyopenerreqs(self):
self.svfs.options = dict((r, 1) for r in self.requirements
if r in self.openerreqs)
# experimental config: format.chunkcachesize
chunkcachesize = self.ui.configint('format', 'chunkcachesize')
if chunkcachesize is not None:
self.svfs.options['chunkcachesize'] = chunkcachesize
# experimental config: format.manifestcachesize
manifestcachesize = self.ui.configint('format', 'manifestcachesize')
if manifestcachesize is not None:
self.svfs.options['manifestcachesize'] = manifestcachesize
deltabothparents = self.ui.configbool('storage',
'revlog.optimize-delta-parent-choice')
self.svfs.options['deltabothparents'] = deltabothparents
self.svfs.options['lazydeltabase'] = not scmutil.gddeltaconfig(self.ui)
chainspan = self.ui.configbytes('experimental', 'maxdeltachainspan')
if 0 <= chainspan:
self.svfs.options['maxdeltachainspan'] = chainspan
mmapindexthreshold = self.ui.configbytes('experimental',
'mmapindexthreshold')
if mmapindexthreshold is not None:
self.svfs.options['mmapindexthreshold'] = mmapindexthreshold
withsparseread = self.ui.configbool('experimental', 'sparse-read')
srdensitythres = float(self.ui.config('experimental',
'sparse-read.density-threshold'))
srmingapsize = self.ui.configbytes('experimental',
'sparse-read.min-gap-size')
self.svfs.options['with-sparse-read'] = withsparseread
self.svfs.options['sparse-read-density-threshold'] = srdensitythres
self.svfs.options['sparse-read-min-gap-size'] = srmingapsize
sparserevlog = SPARSEREVLOG_REQUIREMENT in self.requirements
self.svfs.options['sparse-revlog'] = sparserevlog
if sparserevlog:
self.svfs.options['generaldelta'] = True
maxchainlen = None
if sparserevlog:
maxchainlen = revlogconst.SPARSE_REVLOG_MAX_CHAIN_LENGTH
# experimental config: format.maxchainlen
maxchainlen = self.ui.configint('format', 'maxchainlen', maxchainlen)
if maxchainlen is not None:
self.svfs.options['maxchainlen'] = maxchainlen
for r in self.requirements:
if r.startswith('exp-compression-'):
self.svfs.options['compengine'] = r[len('exp-compression-'):]
# TODO move "revlogv2" to openerreqs once finalized.
if REVLOGV2_REQUIREMENT in self.requirements:
self.svfs.options['revlogv2'] = True
def _writerequirements(self):
scmutil.writerequires(self.vfs, self.requirements)
# Don't cache auditor/nofsauditor, or you'll end up with reference cycle:
# self -> auditor -> self._checknested -> self
@property
def auditor(self):
# This is only used by context.workingctx.match in order to
# detect files in subrepos.
return pathutil.pathauditor(self.root, callback=self._checknested)
@property
def nofsauditor(self):
# This is only used by context.basectx.match in order to detect
# files in subrepos.
return pathutil.pathauditor(self.root, callback=self._checknested,
realfs=False, cached=True)
def _checknested(self, path):
"""Determine if path is a legal nested repository."""
if not path.startswith(self.root):
return False
subpath = path[len(self.root) + 1:]
normsubpath = util.pconvert(subpath)
# XXX: Checking against the current working copy is wrong in
# the sense that it can reject things like
#
# $ hg cat -r 10 sub/x.txt
#
# if sub/ is no longer a subrepository in the working copy
# parent revision.
#
# However, it can of course also allow things that would have
# been rejected before, such as the above cat command if sub/
# is a subrepository now, but was a normal directory before.
# The old path auditor would have rejected by mistake since it
# panics when it sees sub/.hg/.
#
# All in all, checking against the working copy seems sensible
# since we want to prevent access to nested repositories on
# the filesystem *now*.
ctx = self[None]
parts = util.splitpath(subpath)
while parts:
prefix = '/'.join(parts)
if prefix in ctx.substate:
if prefix == normsubpath:
return True
else:
sub = ctx.sub(prefix)
return sub.checknested(subpath[len(prefix) + 1:])
else:
parts.pop()
return False
def peer(self):
return localpeer(self) # not cached to avoid reference cycle
def unfiltered(self):
"""Return unfiltered version of the repository
Intended to be overwritten by filtered repo."""
return self
def filtered(self, name, visibilityexceptions=None):
"""Return a filtered version of a repository"""
cls = repoview.newtype(self.unfiltered().__class__)
return cls(self, name, visibilityexceptions)
@repofilecache('bookmarks', 'bookmarks.current')
def _bookmarks(self):
return bookmarks.bmstore(self)
@property
def _activebookmark(self):
return self._bookmarks.active
# _phasesets depend on changelog. what we need is to call
# _phasecache.invalidate() if '00changelog.i' was changed, but it
# can't be easily expressed in filecache mechanism.
@storecache('phaseroots', '00changelog.i')
def _phasecache(self):
return phases.phasecache(self, self._phasedefaults)
@storecache('obsstore')
def obsstore(self):
return obsolete.makestore(self.ui, self)
@storecache('00changelog.i')
def changelog(self):
return changelog.changelog(self.svfs,
trypending=txnutil.mayhavepending(self.root))
def _constructmanifest(self):
# This is a temporary function while we migrate from manifest to
# manifestlog. It allows bundlerepo and unionrepo to intercept the
# manifest creation.
return manifest.manifestrevlog(self.svfs)
@storecache('00manifest.i')
def manifestlog(self):
return manifest.manifestlog(self.svfs, self)
@repofilecache('dirstate')
def dirstate(self):
return self._makedirstate()
def _makedirstate(self):
"""Extension point for wrapping the dirstate per-repo."""
sparsematchfn = lambda: sparse.matcher(self)
return dirstate.dirstate(self.vfs, self.ui, self.root,
self._dirstatevalidate, sparsematchfn)
def _dirstatevalidate(self, node):
try:
self.changelog.rev(node)
return node
except error.LookupError:
if not self._dirstatevalidatewarned:
self._dirstatevalidatewarned = True
self.ui.warn(_("warning: ignoring unknown"
" working parent %s!\n") % short(node))
return nullid
@storecache(narrowspec.FILENAME)
def narrowpats(self):
"""matcher patterns for this repository's narrowspec
A tuple of (includes, excludes).
"""
source = self
if self.shared():
from . import hg
source = hg.sharedreposource(self)
return narrowspec.load(source)
@storecache(narrowspec.FILENAME)
def _narrowmatch(self):
if repository.NARROW_REQUIREMENT not in self.requirements:
return matchmod.always(self.root, '')
include, exclude = self.narrowpats
return narrowspec.match(self.root, include=include, exclude=exclude)
# TODO(martinvonz): make this property-like instead?
def narrowmatch(self):
return self._narrowmatch
def setnarrowpats(self, newincludes, newexcludes):
narrowspec.save(self, newincludes, newexcludes)
self.invalidate(clearfilecache=True)
def __getitem__(self, changeid):
if changeid is None:
return context.workingctx(self)
if isinstance(changeid, context.basectx):
return changeid
if isinstance(changeid, slice):
# wdirrev isn't contiguous so the slice shouldn't include it
return [context.changectx(self, i)
for i in pycompat.xrange(*changeid.indices(len(self)))
if i not in self.changelog.filteredrevs]
try:
return context.changectx(self, changeid)
except error.WdirUnsupported:
return context.workingctx(self)
def __contains__(self, changeid):
"""True if the given changeid exists
error.AmbiguousPrefixLookupError is raised if an ambiguous node
specified.
"""
try:
self[changeid]
return True
except error.RepoLookupError:
return False
def __nonzero__(self):
return True
__bool__ = __nonzero__
def __len__(self):
# no need to pay the cost of repoview.changelog
unfi = self.unfiltered()
return len(unfi.changelog)
def __iter__(self):
return iter(self.changelog)
def revs(self, expr, *args):
'''Find revisions matching a revset.
The revset is specified as a string ``expr`` that may contain
%-formatting to escape certain types. See ``revsetlang.formatspec``.
Revset aliases from the configuration are not expanded. To expand
user aliases, consider calling ``scmutil.revrange()`` or
``repo.anyrevs([expr], user=True)``.
Returns a revset.abstractsmartset, which is a list-like interface
that contains integer revisions.
'''
expr = revsetlang.formatspec(expr, *args)
m = revset.match(None, expr)
return m(self)
def set(self, expr, *args):
'''Find revisions matching a revset and emit changectx instances.
This is a convenience wrapper around ``revs()`` that iterates the
result and is a generator of changectx instances.
Revset aliases from the configuration are not expanded. To expand
user aliases, consider calling ``scmutil.revrange()``.
'''
for r in self.revs(expr, *args):
yield self[r]
def anyrevs(self, specs, user=False, localalias=None):
'''Find revisions matching one of the given revsets.
Revset aliases from the configuration are not expanded by default. To
expand user aliases, specify ``user=True``. To provide some local
definitions overriding user aliases, set ``localalias`` to
``{name: definitionstring}``.
'''
if user:
m = revset.matchany(self.ui, specs,
lookup=revset.lookupfn(self),
localalias=localalias)
else:
m = revset.matchany(None, specs, localalias=localalias)
return m(self)
def url(self):
return 'file:' + self.root
def hook(self, name, throw=False, **args):
"""Call a hook, passing this repo instance.
This a convenience method to aid invoking hooks. Extensions likely
won't call this unless they have registered a custom hook or are
replacing code that is expected to call a hook.
"""
return hook.hook(self.ui, self, name, throw, **args)
@filteredpropertycache
def _tagscache(self):
'''Returns a tagscache object that contains various tags related
caches.'''
# This simplifies its cache management by having one decorated
# function (this one) and the rest simply fetch things from it.
class tagscache(object):
def __init__(self):
# These two define the set of tags for this repository. tags
# maps tag name to node; tagtypes maps tag name to 'global' or
# 'local'. (Global tags are defined by .hgtags across all
# heads, and local tags are defined in .hg/localtags.)
# They constitute the in-memory cache of tags.
self.tags = self.tagtypes = None
self.nodetagscache = self.tagslist = None
cache = tagscache()
cache.tags, cache.tagtypes = self._findtags()
return cache
def tags(self):
'''return a mapping of tag to node'''
t = {}
if self.changelog.filteredrevs:
tags, tt = self._findtags()
else:
tags = self._tagscache.tags
for k, v in tags.iteritems():
try:
# ignore tags to unknown nodes
self.changelog.rev(v)
t[k] = v
except (error.LookupError, ValueError):
pass
return t
def _findtags(self):
'''Do the hard work of finding tags. Return a pair of dicts
(tags, tagtypes) where tags maps tag name to node, and tagtypes
maps tag name to a string like \'global\' or \'local\'.
Subclasses or extensions are free to add their own tags, but
should be aware that the returned dicts will be retained for the
duration of the localrepo object.'''
# XXX what tagtype should subclasses/extensions use? Currently
# mq and bookmarks add tags, but do not set the tagtype at all.
# Should each extension invent its own tag type? Should there
# be one tagtype for all such "virtual" tags? Or is the status
# quo fine?
# map tag name to (node, hist)
alltags = tagsmod.findglobaltags(self.ui, self)
# map tag name to tag type
tagtypes = dict((tag, 'global') for tag in alltags)
tagsmod.readlocaltags(self.ui, self, alltags, tagtypes)
# Build the return dicts. Have to re-encode tag names because
# the tags module always uses UTF-8 (in order not to lose info
# writing to the cache), but the rest of Mercurial wants them in
# local encoding.
tags = {}
for (name, (node, hist)) in alltags.iteritems():
if node != nullid:
tags[encoding.tolocal(name)] = node
tags['tip'] = self.changelog.tip()
tagtypes = dict([(encoding.tolocal(name), value)
for (name, value) in tagtypes.iteritems()])
return (tags, tagtypes)
def tagtype(self, tagname):
'''
return the type of the given tag. result can be:
'local' : a local tag
'global' : a global tag
None : tag does not exist
'''
return self._tagscache.tagtypes.get(tagname)
def tagslist(self):
'''return a list of tags ordered by revision'''
if not self._tagscache.tagslist:
l = []
for t, n in self.tags().iteritems():
l.append((self.changelog.rev(n), t, n))
self._tagscache.tagslist = [(t, n) for r, t, n in sorted(l)]
return self._tagscache.tagslist
def nodetags(self, node):
'''return the tags associated with a node'''
if not self._tagscache.nodetagscache:
nodetagscache = {}
for t, n in self._tagscache.tags.iteritems():
nodetagscache.setdefault(n, []).append(t)
for tags in nodetagscache.itervalues():
tags.sort()
self._tagscache.nodetagscache = nodetagscache
return self._tagscache.nodetagscache.get(node, [])
def nodebookmarks(self, node):
"""return the list of bookmarks pointing to the specified node"""
return self._bookmarks.names(node)
def branchmap(self):
'''returns a dictionary {branch: [branchheads]} with branchheads
ordered by increasing revision number'''
branchmap.updatecache(self)
return self._branchcaches[self.filtername]
@unfilteredmethod
def revbranchcache(self):
if not self._revbranchcache:
self._revbranchcache = branchmap.revbranchcache(self.unfiltered())
return self._revbranchcache
def branchtip(self, branch, ignoremissing=False):
'''return the tip node for a given branch
If ignoremissing is True, then this method will not raise an error.
This is helpful for callers that only expect None for a missing branch
(e.g. namespace).
'''
try:
return self.branchmap().branchtip(branch)
except KeyError:
if not ignoremissing:
raise error.RepoLookupError(_("unknown branch '%s'") % branch)
else:
pass
def lookup(self, key):
return scmutil.revsymbol(self, key).node()
def lookupbranch(self, key):
if key in self.branchmap():
return key
return scmutil.revsymbol(self, key).branch()
def known(self, nodes):
cl = self.changelog
nm = cl.nodemap
filtered = cl.filteredrevs
result = []
for n in nodes:
r = nm.get(n)
resp = not (r is None or r in filtered)
result.append(resp)
return result
def local(self):
return self
def publishing(self):
# it's safe (and desirable) to trust the publish flag unconditionally
# so that we don't finalize changes shared between users via ssh or nfs
return self.ui.configbool('phases', 'publish', untrusted=True)
def cancopy(self):
# so statichttprepo's override of local() works
if not self.local():
return False
if not self.publishing():
return True
# if publishing we can't copy if there is filtered content
return not self.filtered('visible').changelog.filteredrevs
def shared(self):
'''the type of shared repository (None if not shared)'''
if self.sharedpath != self.path:
return 'store'
return None
def wjoin(self, f, *insidef):
return self.vfs.reljoin(self.root, f, *insidef)
def file(self, f):
if f[0] == '/':
f = f[1:]
return filelog.filelog(self.svfs, f)
def setparents(self, p1, p2=nullid):
with self.dirstate.parentchange():
copies = self.dirstate.setparents(p1, p2)
pctx = self[p1]
if copies:
# Adjust copy records, the dirstate cannot do it, it
# requires access to parents manifests. Preserve them
# only for entries added to first parent.
for f in copies:
if f not in pctx and copies[f] in pctx:
self.dirstate.copy(copies[f], f)
if p2 == nullid:
for f, s in sorted(self.dirstate.copies().items()):
if f not in pctx and s not in pctx:
self.dirstate.copy(None, f)
def filectx(self, path, changeid=None, fileid=None, changectx=None):
"""changeid can be a changeset revision, node, or tag.
fileid can be a file revision or node."""
return context.filectx(self, path, changeid, fileid,
changectx=changectx)
def getcwd(self):
return self.dirstate.getcwd()
def pathto(self, f, cwd=None):
return self.dirstate.pathto(f, cwd)
def _loadfilter(self, filter):
if filter not in self._filterpats:
l = []
for pat, cmd in self.ui.configitems(filter):
if cmd == '!':
continue
mf = matchmod.match(self.root, '', [pat])
fn = None
params = cmd
for name, filterfn in self._datafilters.iteritems():
if cmd.startswith(name):
fn = filterfn
params = cmd[len(name):].lstrip()
break
if not fn:
fn = lambda s, c, **kwargs: procutil.filter(s, c)
# Wrap old filters not supporting keyword arguments
if not pycompat.getargspec(fn)[2]:
oldfn = fn
fn = lambda s, c, **kwargs: oldfn(s, c)
l.append((mf, fn, params))
self._filterpats[filter] = l
return self._filterpats[filter]
def _filter(self, filterpats, filename, data):
for mf, fn, cmd in filterpats:
if mf(filename):
self.ui.debug("filtering %s through %s\n" % (filename, cmd))
data = fn(data, cmd, ui=self.ui, repo=self, filename=filename)
break
return data
@unfilteredpropertycache
def _encodefilterpats(self):
return self._loadfilter('encode')
@unfilteredpropertycache
def _decodefilterpats(self):
return self._loadfilter('decode')
def adddatafilter(self, name, filter):
self._datafilters[name] = filter
def wread(self, filename):
if self.wvfs.islink(filename):
data = self.wvfs.readlink(filename)
else:
data = self.wvfs.read(filename)
return self._filter(self._encodefilterpats, filename, data)
def wwrite(self, filename, data, flags, backgroundclose=False, **kwargs):
"""write ``data`` into ``filename`` in the working directory
This returns length of written (maybe decoded) data.
"""
data = self._filter(self._decodefilterpats, filename, data)
if 'l' in flags:
self.wvfs.symlink(data, filename)
else:
self.wvfs.write(filename, data, backgroundclose=backgroundclose,
**kwargs)
if 'x' in flags:
self.wvfs.setflags(filename, False, True)
else:
self.wvfs.setflags(filename, False, False)
return len(data)
def wwritedata(self, filename, data):
return self._filter(self._decodefilterpats, filename, data)
def currenttransaction(self):
"""return the current transaction or None if non exists"""
if self._transref:
tr = self._transref()
else:
tr = None
if tr and tr.running():
return tr
return None
def transaction(self, desc, report=None):
if (self.ui.configbool('devel', 'all-warnings')
or self.ui.configbool('devel', 'check-locks')):
if self._currentlock(self._lockref) is None:
raise error.ProgrammingError('transaction requires locking')
tr = self.currenttransaction()
if tr is not None:
return tr.nest(name=desc)
# abort here if the journal already exists
if self.svfs.exists("journal"):
raise error.RepoError(
_("abandoned transaction found"),
hint=_("run 'hg recover' to clean up transaction"))
idbase = "%.40f#%f" % (random.random(), time.time())
ha = hex(hashlib.sha1(idbase).digest())
txnid = 'TXN:' + ha
self.hook('pretxnopen', throw=True, txnname=desc, txnid=txnid)
self._writejournal(desc)
renames = [(vfs, x, undoname(x)) for vfs, x in self._journalfiles()]
if report:
rp = report
else:
rp = self.ui.warn
vfsmap = {'plain': self.vfs} # root of .hg/
# we must avoid cyclic reference between repo and transaction.
reporef = weakref.ref(self)
# Code to track tag movement
#
# Since tags are all handled as file content, it is actually quite hard
# to track these movement from a code perspective. So we fallback to a
# tracking at the repository level. One could envision to track changes
# to the '.hgtags' file through changegroup apply but that fails to
# cope with case where transaction expose new heads without changegroup
# being involved (eg: phase movement).
#
# For now, We gate the feature behind a flag since this likely comes
# with performance impacts. The current code run more often than needed
# and do not use caches as much as it could. The current focus is on
# the behavior of the feature so we disable it by default. The flag
# will be removed when we are happy with the performance impact.
#
# Once this feature is no longer experimental move the following
# documentation to the appropriate help section:
#
# The ``HG_TAG_MOVED`` variable will be set if the transaction touched
# tags (new or changed or deleted tags). In addition the details of
# these changes are made available in a file at:
# ``REPOROOT/.hg/changes/tags.changes``.
# Make sure you check for HG_TAG_MOVED before reading that file as it
# might exist from a previous transaction even if no tag were touched
# in this one. Changes are recorded in a line base format::
#
# <action> <hex-node> <tag-name>\n
#
# Actions are defined as follow:
# "-R": tag is removed,
# "+A": tag is added,
# "-M": tag is moved (old value),
# "+M": tag is moved (new value),
tracktags = lambda x: None
# experimental config: experimental.hook-track-tags
shouldtracktags = self.ui.configbool('experimental', 'hook-track-tags')
if desc != 'strip' and shouldtracktags:
oldheads = self.changelog.headrevs()
def tracktags(tr2):
repo = reporef()
oldfnodes = tagsmod.fnoderevs(repo.ui, repo, oldheads)
newheads = repo.changelog.headrevs()
newfnodes = tagsmod.fnoderevs(repo.ui, repo, newheads)
# notes: we compare lists here.
# As we do it only once buiding set would not be cheaper
changes = tagsmod.difftags(repo.ui, repo, oldfnodes, newfnodes)
if changes:
tr2.hookargs['tag_moved'] = '1'
with repo.vfs('changes/tags.changes', 'w',
atomictemp=True) as changesfile:
# note: we do not register the file to the transaction
# because we needs it to still exist on the transaction
# is close (for txnclose hooks)
tagsmod.writediff(changesfile, changes)
def validate(tr2):
"""will run pre-closing hooks"""
# XXX the transaction API is a bit lacking here so we take a hacky
# path for now
#
# We cannot add this as a "pending" hooks since the 'tr.hookargs'
# dict is copied before these run. In addition we needs the data
# available to in memory hooks too.
#
# Moreover, we also need to make sure this runs before txnclose
# hooks and there is no "pending" mechanism that would execute
# logic only if hooks are about to run.
#
# Fixing this limitation of the transaction is also needed to track
# other families of changes (bookmarks, phases, obsolescence).
#
# This will have to be fixed before we remove the experimental
# gating.
tracktags(tr2)
repo = reporef()
if repo.ui.configbool('experimental', 'single-head-per-branch'):
scmutil.enforcesinglehead(repo, tr2, desc)
if hook.hashook(repo.ui, 'pretxnclose-bookmark'):
for name, (old, new) in sorted(tr.changes['bookmarks'].items()):
args = tr.hookargs.copy()
args.update(bookmarks.preparehookargs(name, old, new))
repo.hook('pretxnclose-bookmark', throw=True,
txnname=desc,
**pycompat.strkwargs(args))
if hook.hashook(repo.ui, 'pretxnclose-phase'):
cl = repo.unfiltered().changelog
for rev, (old, new) in tr.changes['phases'].items():
args = tr.hookargs.copy()
node = hex(cl.node(rev))
args.update(phases.preparehookargs(node, old, new))
repo.hook('pretxnclose-phase', throw=True, txnname=desc,
**pycompat.strkwargs(args))
repo.hook('pretxnclose', throw=True,
txnname=desc, **pycompat.strkwargs(tr.hookargs))
def releasefn(tr, success):
repo = reporef()
if success:
# this should be explicitly invoked here, because
# in-memory changes aren't written out at closing
# transaction, if tr.addfilegenerator (via
# dirstate.write or so) isn't invoked while
# transaction running
repo.dirstate.write(None)
else:
# discard all changes (including ones already written
# out) in this transaction
narrowspec.restorebackup(self, 'journal.narrowspec')
repo.dirstate.restorebackup(None, 'journal.dirstate')
repo.invalidate(clearfilecache=True)
tr = transaction.transaction(rp, self.svfs, vfsmap,
"journal",
"undo",
aftertrans(renames),
self.store.createmode,
validator=validate,
releasefn=releasefn,
checkambigfiles=_cachedfiles,
name=desc)
tr.changes['origrepolen'] = len(self)
tr.changes['obsmarkers'] = set()
tr.changes['phases'] = {}
tr.changes['bookmarks'] = {}
tr.hookargs['txnid'] = txnid
# note: writing the fncache only during finalize mean that the file is
# outdated when running hooks. As fncache is used for streaming clone,
# this is not expected to break anything that happen during the hooks.
tr.addfinalize('flush-fncache', self.store.write)
def txnclosehook(tr2):
"""To be run if transaction is successful, will schedule a hook run
"""
# Don't reference tr2 in hook() so we don't hold a reference.
# This reduces memory consumption when there are multiple
# transactions per lock. This can likely go away if issue5045
# fixes the function accumulation.
hookargs = tr2.hookargs
def hookfunc():
repo = reporef()
if hook.hashook(repo.ui, 'txnclose-bookmark'):
bmchanges = sorted(tr.changes['bookmarks'].items())
for name, (old, new) in bmchanges:
args = tr.hookargs.copy()
args.update(bookmarks.preparehookargs(name, old, new))
repo.hook('txnclose-bookmark', throw=False,
txnname=desc, **pycompat.strkwargs(args))
if hook.hashook(repo.ui, 'txnclose-phase'):
cl = repo.unfiltered().changelog
phasemv = sorted(tr.changes['phases'].items())
for rev, (old, new) in phasemv:
args = tr.hookargs.copy()
node = hex(cl.node(rev))
args.update(phases.preparehookargs(node, old, new))
repo.hook('txnclose-phase', throw=False, txnname=desc,
**pycompat.strkwargs(args))
repo.hook('txnclose', throw=False, txnname=desc,
**pycompat.strkwargs(hookargs))
reporef()._afterlock(hookfunc)
tr.addfinalize('txnclose-hook', txnclosehook)
# Include a leading "-" to make it happen before the transaction summary
# reports registered via scmutil.registersummarycallback() whose names
# are 00-txnreport etc. That way, the caches will be warm when the
# callbacks run.
tr.addpostclose('-warm-cache', self._buildcacheupdater(tr))
def txnaborthook(tr2):
"""To be run if transaction is aborted
"""
reporef().hook('txnabort', throw=False, txnname=desc,
**pycompat.strkwargs(tr2.hookargs))
tr.addabort('txnabort-hook', txnaborthook)
# avoid eager cache invalidation. in-memory data should be identical
# to stored data if transaction has no error.
tr.addpostclose('refresh-filecachestats', self._refreshfilecachestats)
self._transref = weakref.ref(tr)
scmutil.registersummarycallback(self, tr, desc)
return tr
def _journalfiles(self):
return ((self.svfs, 'journal'),
(self.vfs, 'journal.dirstate'),
(self.vfs, 'journal.branch'),
(self.vfs, 'journal.desc'),
(self.vfs, 'journal.bookmarks'),
(self.svfs, 'journal.phaseroots'))
def undofiles(self):
return [(vfs, undoname(x)) for vfs, x in self._journalfiles()]
@unfilteredmethod
def _writejournal(self, desc):
self.dirstate.savebackup(None, 'journal.dirstate')
narrowspec.savebackup(self, 'journal.narrowspec')
self.vfs.write("journal.branch",
encoding.fromlocal(self.dirstate.branch()))
self.vfs.write("journal.desc",
"%d\n%s\n" % (len(self), desc))
self.vfs.write("journal.bookmarks",
self.vfs.tryread("bookmarks"))
self.svfs.write("journal.phaseroots",
self.svfs.tryread("phaseroots"))
def recover(self):
with self.lock():
if self.svfs.exists("journal"):
self.ui.status(_("rolling back interrupted transaction\n"))
vfsmap = {'': self.svfs,
'plain': self.vfs,}
transaction.rollback(self.svfs, vfsmap, "journal",
self.ui.warn,
checkambigfiles=_cachedfiles)
self.invalidate()
return True
else:
self.ui.warn(_("no interrupted transaction available\n"))
return False
def rollback(self, dryrun=False, force=False):
wlock = lock = dsguard = None
try:
wlock = self.wlock()
lock = self.lock()
if self.svfs.exists("undo"):
dsguard = dirstateguard.dirstateguard(self, 'rollback')
return self._rollback(dryrun, force, dsguard)
else:
self.ui.warn(_("no rollback information available\n"))
return 1
finally:
release(dsguard, lock, wlock)
@unfilteredmethod # Until we get smarter cache management
def _rollback(self, dryrun, force, dsguard):
ui = self.ui
try:
args = self.vfs.read('undo.desc').splitlines()
(oldlen, desc, detail) = (int(args[0]), args[1], None)
if len(args) >= 3:
detail = args[2]
oldtip = oldlen - 1
if detail and ui.verbose:
msg = (_('repository tip rolled back to revision %d'
' (undo %s: %s)\n')
% (oldtip, desc, detail))
else:
msg = (_('repository tip rolled back to revision %d'
' (undo %s)\n')
% (oldtip, desc))
except IOError:
msg = _('rolling back unknown transaction\n')
desc = None
if not force and self['.'] != self['tip'] and desc == 'commit':
raise error.Abort(
_('rollback of last commit while not checked out '
'may lose data'), hint=_('use -f to force'))
ui.status(msg)
if dryrun:
return 0
parents = self.dirstate.parents()
self.destroying()
vfsmap = {'plain': self.vfs, '': self.svfs}
transaction.rollback(self.svfs, vfsmap, 'undo', ui.warn,
checkambigfiles=_cachedfiles)
if self.vfs.exists('undo.bookmarks'):
self.vfs.rename('undo.bookmarks', 'bookmarks', checkambig=True)
if self.svfs.exists('undo.phaseroots'):
self.svfs.rename('undo.phaseroots', 'phaseroots', checkambig=True)
self.invalidate()
parentgone = (parents[0] not in self.changelog.nodemap or
parents[1] not in self.changelog.nodemap)
if parentgone:
# prevent dirstateguard from overwriting already restored one
dsguard.close()
narrowspec.restorebackup(self, 'undo.narrowspec')
self.dirstate.restorebackup(None, 'undo.dirstate')
try:
branch = self.vfs.read('undo.branch')
self.dirstate.setbranch(encoding.tolocal(branch))
except IOError:
ui.warn(_('named branch could not be reset: '
'current branch is still \'%s\'\n')
% self.dirstate.branch())
parents = tuple([p.rev() for p in self[None].parents()])
if len(parents) > 1:
ui.status(_('working directory now based on '
'revisions %d and %d\n') % parents)
else:
ui.status(_('working directory now based on '
'revision %d\n') % parents)
mergemod.mergestate.clean(self, self['.'].node())
# TODO: if we know which new heads may result from this rollback, pass
# them to destroy(), which will prevent the branchhead cache from being
# invalidated.
self.destroyed()
return 0
def _buildcacheupdater(self, newtransaction):
"""called during transaction to build the callback updating cache
Lives on the repository to help extension who might want to augment
this logic. For this purpose, the created transaction is passed to the
method.
"""
# we must avoid cyclic reference between repo and transaction.
reporef = weakref.ref(self)
def updater(tr):
repo = reporef()
repo.updatecaches(tr)
return updater
@unfilteredmethod
def updatecaches(self, tr=None, full=False):
"""warm appropriate caches
If this function is called after a transaction closed. The transaction
will be available in the 'tr' argument. This can be used to selectively
update caches relevant to the changes in that transaction.
If 'full' is set, make sure all caches the function knows about have
up-to-date data. Even the ones usually loaded more lazily.
"""
if tr is not None and tr.hookargs.get('source') == 'strip':
# During strip, many caches are invalid but
# later call to `destroyed` will refresh them.
return
if tr is None or tr.changes['origrepolen'] < len(self):
# updating the unfiltered branchmap should refresh all the others,
self.ui.debug('updating the branch cache\n')
branchmap.updatecache(self.filtered('served'))
if full:
rbc = self.revbranchcache()
for r in self.changelog:
rbc.branchinfo(r)
rbc.write()
# ensure the working copy parents are in the manifestfulltextcache
for ctx in self['.'].parents():
ctx.manifest() # accessing the manifest is enough
def invalidatecaches(self):
if '_tagscache' in vars(self):
# can't use delattr on proxy
del self.__dict__['_tagscache']
self.unfiltered()._branchcaches.clear()
self.invalidatevolatilesets()
self._sparsesignaturecache.clear()
def invalidatevolatilesets(self):
self.filteredrevcache.clear()
obsolete.clearobscaches(self)
def invalidatedirstate(self):
'''Invalidates the dirstate, causing the next call to dirstate
to check if it was modified since the last time it was read,
rereading it if it has.
This is different to dirstate.invalidate() that it doesn't always
rereads the dirstate. Use dirstate.invalidate() if you want to
explicitly read the dirstate again (i.e. restoring it to a previous
known good state).'''
if hasunfilteredcache(self, 'dirstate'):
for k in self.dirstate._filecache:
try:
delattr(self.dirstate, k)
except AttributeError:
pass
delattr(self.unfiltered(), 'dirstate')
def invalidate(self, clearfilecache=False):
'''Invalidates both store and non-store parts other than dirstate
If a transaction is running, invalidation of store is omitted,
because discarding in-memory changes might cause inconsistency
(e.g. incomplete fncache causes unintentional failure, but
redundant one doesn't).
'''
unfiltered = self.unfiltered() # all file caches are stored unfiltered
for k in list(self._filecache.keys()):
# dirstate is invalidated separately in invalidatedirstate()
if k == 'dirstate':
continue
if (k == 'changelog' and
self.currenttransaction() and
self.changelog._delayed):
# The changelog object may store unwritten revisions. We don't
# want to lose them.
# TODO: Solve the problem instead of working around it.
continue
if clearfilecache:
del self._filecache[k]
try:
delattr(unfiltered, k)
except AttributeError:
pass
self.invalidatecaches()
if not self.currenttransaction():
# TODO: Changing contents of store outside transaction
# causes inconsistency. We should make in-memory store
# changes detectable, and abort if changed.
self.store.invalidatecaches()
def invalidateall(self):
'''Fully invalidates both store and non-store parts, causing the
subsequent operation to reread any outside changes.'''
# extension should hook this to invalidate its caches
self.invalidate()
self.invalidatedirstate()
@unfilteredmethod
def _refreshfilecachestats(self, tr):
"""Reload stats of cached files so that they are flagged as valid"""
for k, ce in self._filecache.items():
k = pycompat.sysstr(k)
if k == r'dirstate' or k not in self.__dict__:
continue
ce.refresh()
def _lock(self, vfs, lockname, wait, releasefn, acquirefn, desc,
inheritchecker=None, parentenvvar=None):
parentlock = None
# the contents of parentenvvar are used by the underlying lock to
# determine whether it can be inherited
if parentenvvar is not None:
parentlock = encoding.environ.get(parentenvvar)
timeout = 0
warntimeout = 0
if wait:
timeout = self.ui.configint("ui", "timeout")
warntimeout = self.ui.configint("ui", "timeout.warn")
# internal config: ui.signal-safe-lock
signalsafe = self.ui.configbool('ui', 'signal-safe-lock')
l = lockmod.trylock(self.ui, vfs, lockname, timeout, warntimeout,
releasefn=releasefn,
acquirefn=acquirefn, desc=desc,
inheritchecker=inheritchecker,
parentlock=parentlock,
signalsafe=signalsafe)
return l
def _afterlock(self, callback):
"""add a callback to be run when the repository is fully unlocked
The callback will be executed when the outermost lock is released
(with wlock being higher level than 'lock')."""
for ref in (self._wlockref, self._lockref):
l = ref and ref()
if l and l.held:
l.postrelease.append(callback)
break
else: # no lock have been found.
callback()
def lock(self, wait=True):
'''Lock the repository store (.hg/store) and return a weak reference
to the lock. Use this before modifying the store (e.g. committing or
stripping). If you are opening a transaction, get a lock as well.)
If both 'lock' and 'wlock' must be acquired, ensure you always acquires
'wlock' first to avoid a dead-lock hazard.'''
l = self._currentlock(self._lockref)
if l is not None:
l.lock()
return l
l = self._lock(self.svfs, "lock", wait, None,
self.invalidate, _('repository %s') % self.origroot)
self._lockref = weakref.ref(l)
return l
def _wlockchecktransaction(self):
if self.currenttransaction() is not None:
raise error.LockInheritanceContractViolation(
'wlock cannot be inherited in the middle of a transaction')
def wlock(self, wait=True):
'''Lock the non-store parts of the repository (everything under
.hg except .hg/store) and return a weak reference to the lock.
Use this before modifying files in .hg.
If both 'lock' and 'wlock' must be acquired, ensure you always acquires
'wlock' first to avoid a dead-lock hazard.'''
l = self._wlockref and self._wlockref()
if l is not None and l.held:
l.lock()
return l
# We do not need to check for non-waiting lock acquisition. Such
# acquisition would not cause dead-lock as they would just fail.
if wait and (self.ui.configbool('devel', 'all-warnings')
or self.ui.configbool('devel', 'check-locks')):
if self._currentlock(self._lockref) is not None:
self.ui.develwarn('"wlock" acquired after "lock"')
def unlock():
if self.dirstate.pendingparentchange():
self.dirstate.invalidate()
else:
self.dirstate.write(None)
self._filecache['dirstate'].refresh()
l = self._lock(self.vfs, "wlock", wait, unlock,
self.invalidatedirstate, _('working directory of %s') %
self.origroot,
inheritchecker=self._wlockchecktransaction,
parentenvvar='HG_WLOCK_LOCKER')
self._wlockref = weakref.ref(l)
return l
def _currentlock(self, lockref):
"""Returns the lock if it's held, or None if it's not."""
if lockref is None:
return None
l = lockref()
if l is None or not l.held:
return None
return l
def currentwlock(self):
"""Returns the wlock if it's held, or None if it's not."""
return self._currentlock(self._wlockref)
def _filecommit(self, fctx, manifest1, manifest2, linkrev, tr, changelist):
"""
commit an individual file as part of a larger transaction
"""
fname = fctx.path()
fparent1 = manifest1.get(fname, nullid)
fparent2 = manifest2.get(fname, nullid)
if isinstance(fctx, context.filectx):
node = fctx.filenode()
if node in [fparent1, fparent2]:
self.ui.debug('reusing %s filelog entry\n' % fname)
if manifest1.flags(fname) != fctx.flags():
changelist.append(fname)
return node
flog = self.file(fname)
meta = {}
copy = fctx.renamed()
if copy and copy[0] != fname:
# Mark the new revision of this file as a copy of another
# file. This copy data will effectively act as a parent
# of this new revision. If this is a merge, the first
# parent will be the nullid (meaning "look up the copy data")
# and the second one will be the other parent. For example:
#
# 0 --- 1 --- 3 rev1 changes file foo
# \ / rev2 renames foo to bar and changes it
# \- 2 -/ rev3 should have bar with all changes and
# should record that bar descends from
# bar in rev2 and foo in rev1
#
# this allows this merge to succeed:
#
# 0 --- 1 --- 3 rev4 reverts the content change from rev2
# \ / merging rev3 and rev4 should use bar@rev2
# \- 2 --- 4 as the merge base
#
cfname = copy[0]
crev = manifest1.get(cfname)
newfparent = fparent2
if manifest2: # branch merge
if fparent2 == nullid or crev is None: # copied on remote side
if cfname in manifest2:
crev = manifest2[cfname]
newfparent = fparent1
# Here, we used to search backwards through history to try to find
# where the file copy came from if the source of a copy was not in
# the parent directory. However, this doesn't actually make sense to
# do (what does a copy from something not in your working copy even
# mean?) and it causes bugs (eg, issue4476). Instead, we will warn
# the user that copy information was dropped, so if they didn't
# expect this outcome it can be fixed, but this is the correct
# behavior in this circumstance.
if crev:
self.ui.debug(" %s: copy %s:%s\n" % (fname, cfname, hex(crev)))
meta["copy"] = cfname
meta["copyrev"] = hex(crev)
fparent1, fparent2 = nullid, newfparent
else:
self.ui.warn(_("warning: can't find ancestor for '%s' "
"copied from '%s'!\n") % (fname, cfname))
elif fparent1 == nullid:
fparent1, fparent2 = fparent2, nullid
elif fparent2 != nullid:
# is one parent an ancestor of the other?
fparentancestors = flog.commonancestorsheads(fparent1, fparent2)
if fparent1 in fparentancestors:
fparent1, fparent2 = fparent2, nullid
elif fparent2 in fparentancestors:
fparent2 = nullid
# is the file changed?
text = fctx.data()
if fparent2 != nullid or flog.cmp(fparent1, text) or meta:
changelist.append(fname)
return flog.add(text, meta, tr, linkrev, fparent1, fparent2)
# are just the flags changed during merge?
elif fname in manifest1 and manifest1.flags(fname) != fctx.flags():
changelist.append(fname)
return fparent1
def checkcommitpatterns(self, wctx, vdirs, match, status, fail):
"""check for commit arguments that aren't committable"""
if match.isexact() or match.prefix():
matched = set(status.modified + status.added + status.removed)
for f in match.files():
f = self.dirstate.normalize(f)
if f == '.' or f in matched or f in wctx.substate:
continue
if f in status.deleted:
fail(f, _('file not found!'))
if f in vdirs: # visited directory
d = f + '/'
for mf in matched:
if mf.startswith(d):
break
else:
fail(f, _("no match under directory!"))
elif f not in self.dirstate:
fail(f, _("file not tracked!"))
@unfilteredmethod
def commit(self, text="", user=None, date=None, match=None, force=False,
editor=False, extra=None):
"""Add a new revision to current repository.
Revision information is gathered from the working directory,
match can be used to filter the committed files. If editor is
supplied, it is called to get a commit message.
"""
if extra is None:
extra = {}
def fail(f, msg):
raise error.Abort('%s: %s' % (f, msg))
if not match:
match = matchmod.always(self.root, '')
if not force:
vdirs = []
match.explicitdir = vdirs.append
match.bad = fail
wlock = lock = tr = None
try:
wlock = self.wlock()
lock = self.lock() # for recent changelog (see issue4368)
wctx = self[None]
merge = len(wctx.parents()) > 1
if not force and merge and not match.always():
raise error.Abort(_('cannot partially commit a merge '
'(do not specify files or patterns)'))
status = self.status(match=match, clean=force)
if force:
status.modified.extend(status.clean) # mq may commit clean files
# check subrepos
subs, commitsubs, newstate = subrepoutil.precommit(
self.ui, wctx, status, match, force=force)
# make sure all explicit patterns are matched
if not force:
self.checkcommitpatterns(wctx, vdirs, match, status, fail)
cctx = context.workingcommitctx(self, status,
text, user, date, extra)
# internal config: ui.allowemptycommit
allowemptycommit = (wctx.branch() != wctx.p1().branch()
or extra.get('close') or merge or cctx.files()
or self.ui.configbool('ui', 'allowemptycommit'))
if not allowemptycommit:
return None
if merge and cctx.deleted():
raise error.Abort(_("cannot commit merge with missing files"))
ms = mergemod.mergestate.read(self)
mergeutil.checkunresolved(ms)
if editor:
cctx._text = editor(self, cctx, subs)
edited = (text != cctx._text)
# Save commit message in case this transaction gets rolled back
# (e.g. by a pretxncommit hook). Leave the content alone on
# the assumption that the user will use the same editor again.
msgfn = self.savecommitmessage(cctx._text)
# commit subs and write new state
if subs:
for s in sorted(commitsubs):
sub = wctx.sub(s)
self.ui.status(_('committing subrepository %s\n') %
subrepoutil.subrelpath(sub))
sr = sub.commit(cctx._text, user, date)
newstate[s] = (newstate[s][0], sr)
subrepoutil.writestate(self, newstate)
p1, p2 = self.dirstate.parents()
hookp1, hookp2 = hex(p1), (p2 != nullid and hex(p2) or '')
try:
self.hook("precommit", throw=True, parent1=hookp1,
parent2=hookp2)
tr = self.transaction('commit')
ret = self.commitctx(cctx, True)
except: # re-raises
if edited:
self.ui.write(
_('note: commit message saved in %s\n') % msgfn)
raise
# update bookmarks, dirstate and mergestate
bookmarks.update(self, [p1, p2], ret)
cctx.markcommitted(ret)
ms.reset()
tr.close()
finally:
lockmod.release(tr, lock, wlock)
def commithook(node=hex(ret), parent1=hookp1, parent2=hookp2):
# hack for command that use a temporary commit (eg: histedit)
# temporary commit got stripped before hook release
if self.changelog.hasnode(ret):
self.hook("commit", node=node, parent1=parent1,
parent2=parent2)
self._afterlock(commithook)
return ret
@unfilteredmethod
def commitctx(self, ctx, error=False):
"""Add a new revision to current repository.
Revision information is passed via the context argument.
ctx.files() should list all files involved in this commit, i.e.
modified/added/removed files. On merge, it may be wider than the
ctx.files() to be committed, since any file nodes derived directly
from p1 or p2 are excluded from the committed ctx.files().
"""
tr = None
p1, p2 = ctx.p1(), ctx.p2()
user = ctx.user()
lock = self.lock()
try:
tr = self.transaction("commit")
trp = weakref.proxy(tr)
if ctx.manifestnode():
# reuse an existing manifest revision
self.ui.debug('reusing known manifest\n')
mn = ctx.manifestnode()
files = ctx.files()
elif ctx.files():
m1ctx = p1.manifestctx()
m2ctx = p2.manifestctx()
mctx = m1ctx.copy()
m = mctx.read()
m1 = m1ctx.read()
m2 = m2ctx.read()
# check in files
added = []
changed = []
removed = list(ctx.removed())
linkrev = len(self)
self.ui.note(_("committing files:\n"))
for f in sorted(ctx.modified() + ctx.added()):
self.ui.note(f + "\n")
try:
fctx = ctx[f]
if fctx is None:
removed.append(f)
else:
added.append(f)
m[f] = self._filecommit(fctx, m1, m2, linkrev,
trp, changed)
m.setflag(f, fctx.flags())
except OSError as inst:
self.ui.warn(_("trouble committing %s!\n") % f)
raise
except IOError as inst:
errcode = getattr(inst, 'errno', errno.ENOENT)
if error or errcode and errcode != errno.ENOENT:
self.ui.warn(_("trouble committing %s!\n") % f)
raise
# update manifest
removed = [f for f in sorted(removed) if f in m1 or f in m2]
drop = [f for f in removed if f in m]
for f in drop:
del m[f]
files = changed + removed
md = None
if not files:
# if no "files" actually changed in terms of the changelog,
# try hard to detect unmodified manifest entry so that the
# exact same commit can be reproduced later on convert.
md = m1.diff(m, scmutil.matchfiles(self, ctx.files()))
if not files and md:
self.ui.debug('not reusing manifest (no file change in '
'changelog, but manifest differs)\n')
if files or md:
self.ui.note(_("committing manifest\n"))
# we're using narrowmatch here since it's already applied at
# other stages (such as dirstate.walk), so we're already
# ignoring things outside of narrowspec in most cases. The
# one case where we might have files outside the narrowspec
# at this point is merges, and we already error out in the
# case where the merge has files outside of the narrowspec,
# so this is safe.
mn = mctx.write(trp, linkrev,
p1.manifestnode(), p2.manifestnode(),
added, drop, match=self.narrowmatch())
else:
self.ui.debug('reusing manifest form p1 (listed files '
'actually unchanged)\n')
mn = p1.manifestnode()
else:
self.ui.debug('reusing manifest from p1 (no file change)\n')
mn = p1.manifestnode()
files = []
# update changelog
self.ui.note(_("committing changelog\n"))
self.changelog.delayupdate(tr)
n = self.changelog.add(mn, files, ctx.description(),
trp, p1.node(), p2.node(),
user, ctx.date(), ctx.extra().copy())
xp1, xp2 = p1.hex(), p2 and p2.hex() or ''
self.hook('pretxncommit', throw=True, node=hex(n), parent1=xp1,
parent2=xp2)
# set the new commit is proper phase
targetphase = subrepoutil.newcommitphase(self.ui, ctx)
if targetphase:
# retract boundary do not alter parent changeset.
# if a parent have higher the resulting phase will
# be compliant anyway
#
# if minimal phase was 0 we don't need to retract anything
phases.registernew(self, tr, targetphase, [n])
tr.close()
return n
finally:
if tr:
tr.release()
lock.release()
@unfilteredmethod
def destroying(self):
'''Inform the repository that nodes are about to be destroyed.
Intended for use by strip and rollback, so there's a common
place for anything that has to be done before destroying history.
This is mostly useful for saving state that is in memory and waiting
to be flushed when the current lock is released. Because a call to
destroyed is imminent, the repo will be invalidated causing those
changes to stay in memory (waiting for the next unlock), or vanish
completely.
'''
# When using the same lock to commit and strip, the phasecache is left
# dirty after committing. Then when we strip, the repo is invalidated,
# causing those changes to disappear.
if '_phasecache' in vars(self):
self._phasecache.write()
@unfilteredmethod
def destroyed(self):
'''Inform the repository that nodes have been destroyed.
Intended for use by strip and rollback, so there's a common
place for anything that has to be done after destroying history.
'''
# When one tries to:
# 1) destroy nodes thus calling this method (e.g. strip)
# 2) use phasecache somewhere (e.g. commit)
#
# then 2) will fail because the phasecache contains nodes that were
# removed. We can either remove phasecache from the filecache,
# causing it to reload next time it is accessed, or simply filter
# the removed nodes now and write the updated cache.
self._phasecache.filterunknown(self)
self._phasecache.write()
# refresh all repository caches
self.updatecaches()
# Ensure the persistent tag cache is updated. Doing it now
# means that the tag cache only has to worry about destroyed
# heads immediately after a strip/rollback. That in turn
# guarantees that "cachetip == currenttip" (comparing both rev
# and node) always means no nodes have been added or destroyed.
# XXX this is suboptimal when qrefresh'ing: we strip the current
# head, refresh the tag cache, then immediately add a new head.
# But I think doing it this way is necessary for the "instant
# tag cache retrieval" case to work.
self.invalidate()
def status(self, node1='.', node2=None, match=None,
ignored=False, clean=False, unknown=False,
listsubrepos=False):
'''a convenience method that calls node1.status(node2)'''
return self[node1].status(node2, match, ignored, clean, unknown,
listsubrepos)
def addpostdsstatus(self, ps):
"""Add a callback to run within the wlock, at the point at which status
fixups happen.
On status completion, callback(wctx, status) will be called with the
wlock held, unless the dirstate has changed from underneath or the wlock
couldn't be grabbed.
Callbacks should not capture and use a cached copy of the dirstate --
it might change in the meanwhile. Instead, they should access the
dirstate via wctx.repo().dirstate.
This list is emptied out after each status run -- extensions should
make sure it adds to this list each time dirstate.status is called.
Extensions should also make sure they don't call this for statuses
that don't involve the dirstate.
"""
# The list is located here for uniqueness reasons -- it is actually
# managed by the workingctx, but that isn't unique per-repo.
self._postdsstatus.append(ps)
def postdsstatus(self):
"""Used by workingctx to get the list of post-dirstate-status hooks."""
return self._postdsstatus
def clearpostdsstatus(self):
"""Used by workingctx to clear post-dirstate-status hooks."""
del self._postdsstatus[:]
def heads(self, start=None):
if start is None:
cl = self.changelog
headrevs = reversed(cl.headrevs())
return [cl.node(rev) for rev in headrevs]
heads = self.changelog.heads(start)
# sort the output in rev descending order
return sorted(heads, key=self.changelog.rev, reverse=True)
def branchheads(self, branch=None, start=None, closed=False):
'''return a (possibly filtered) list of heads for the given branch
Heads are returned in topological order, from newest to oldest.
If branch is None, use the dirstate branch.
If start is not None, return only heads reachable from start.
If closed is True, return heads that are marked as closed as well.
'''
if branch is None:
branch = self[None].branch()
branches = self.branchmap()
if branch not in branches:
return []
# the cache returns heads ordered lowest to highest
bheads = list(reversed(branches.branchheads(branch, closed=closed)))
if start is not None:
# filter out the heads that cannot be reached from startrev
fbheads = set(self.changelog.nodesbetween([start], bheads)[2])
bheads = [h for h in bheads if h in fbheads]
return bheads
def branches(self, nodes):
if not nodes:
nodes = [self.changelog.tip()]
b = []
for n in nodes:
t = n
while True:
p = self.changelog.parents(n)
if p[1] != nullid or p[0] == nullid:
b.append((t, n, p[0], p[1]))
break
n = p[0]
return b
def between(self, pairs):
r = []
for top, bottom in pairs:
n, l, i = top, [], 0
f = 1
while n != bottom and n != nullid:
p = self.changelog.parents(n)[0]
if i == f:
l.append(n)
f = f * 2
n = p
i += 1
r.append(l)
return r
def checkpush(self, pushop):
"""Extensions can override this function if additional checks have
to be performed before pushing, or call it if they override push
command.
"""
@unfilteredpropertycache
def prepushoutgoinghooks(self):
"""Return util.hooks consists of a pushop with repo, remote, outgoing
methods, which are called before pushing changesets.
"""
return util.hooks()
def pushkey(self, namespace, key, old, new):
try:
tr = self.currenttransaction()
hookargs = {}
if tr is not None:
hookargs.update(tr.hookargs)
hookargs = pycompat.strkwargs(hookargs)
hookargs[r'namespace'] = namespace
hookargs[r'key'] = key
hookargs[r'old'] = old
hookargs[r'new'] = new
self.hook('prepushkey', throw=True, **hookargs)
except error.HookAbort as exc:
self.ui.write_err(_("pushkey-abort: %s\n") % exc)
if exc.hint:
self.ui.write_err(_("(%s)\n") % exc.hint)
return False
self.ui.debug('pushing key for "%s:%s"\n' % (namespace, key))
ret = pushkey.push(self, namespace, key, old, new)
def runhook():
self.hook('pushkey', namespace=namespace, key=key, old=old, new=new,
ret=ret)
self._afterlock(runhook)
return ret
def listkeys(self, namespace):
self.hook('prelistkeys', throw=True, namespace=namespace)
self.ui.debug('listing keys for "%s"\n' % namespace)
values = pushkey.list(self, namespace)
self.hook('listkeys', namespace=namespace, values=values)
return values
def debugwireargs(self, one, two, three=None, four=None, five=None):
'''used to test argument passing over the wire'''
return "%s %s %s %s %s" % (one, two, pycompat.bytestr(three),
pycompat.bytestr(four),
pycompat.bytestr(five))
def savecommitmessage(self, text):
fp = self.vfs('last-message.txt', 'wb')
try:
fp.write(text)
finally:
fp.close()
return self.pathto(fp.name[len(self.root) + 1:])
# used to avoid circular references so destructors work
def aftertrans(files):
renamefiles = [tuple(t) for t in files]
def a():
for vfs, src, dest in renamefiles:
# if src and dest refer to a same file, vfs.rename is a no-op,
# leaving both src and dest on disk. delete dest to make sure
# the rename couldn't be such a no-op.
vfs.tryunlink(dest)
try:
vfs.rename(src, dest)
except OSError: # journal file does not yet exist
pass
return a
def undoname(fn):
base, name = os.path.split(fn)
assert name.startswith('journal')
return os.path.join(base, name.replace('journal', 'undo', 1))
def instance(ui, path, create, intents=None, createopts=None):
localpath = util.urllocalpath(path)
if create:
createrepository(ui, localpath, createopts=createopts)
return makelocalrepository(ui, localpath, intents=intents)
def islocal(path):
return True
def newreporequirements(ui, createopts=None):
"""Determine the set of requirements for a new local repository.
Extensions can wrap this function to specify custom requirements for
new repositories.
"""
createopts = createopts or {}
requirements = {'revlogv1'}
if ui.configbool('format', 'usestore'):
requirements.add('store')
if ui.configbool('format', 'usefncache'):
requirements.add('fncache')
if ui.configbool('format', 'dotencode'):
requirements.add('dotencode')
compengine = ui.config('experimental', 'format.compression')
if compengine not in util.compengines:
raise error.Abort(_('compression engine %s defined by '
'experimental.format.compression not available') %
compengine,
hint=_('run "hg debuginstall" to list available '
'compression engines'))
# zlib is the historical default and doesn't need an explicit requirement.
if compengine != 'zlib':
requirements.add('exp-compression-%s' % compengine)
if scmutil.gdinitconfig(ui):
requirements.add('generaldelta')
if ui.configbool('experimental', 'treemanifest'):
requirements.add('treemanifest')
# experimental config: format.sparse-revlog
if ui.configbool('format', 'sparse-revlog'):
requirements.add(SPARSEREVLOG_REQUIREMENT)
revlogv2 = ui.config('experimental', 'revlogv2')
if revlogv2 == 'enable-unstable-format-and-corrupt-my-data':
requirements.remove('revlogv1')
# generaldelta is implied by revlogv2.
requirements.discard('generaldelta')
requirements.add(REVLOGV2_REQUIREMENT)
# experimental config: format.internal-phase
if ui.configbool('format', 'internal-phase'):
requirements.add('internal-phase')
if createopts.get('narrowfiles'):
requirements.add(repository.NARROW_REQUIREMENT)
return requirements
def filterknowncreateopts(ui, createopts):
"""Filters a dict of repo creation options against options that are known.
Receives a dict of repo creation options and returns a dict of those
options that we don't know how to handle.
This function is called as part of repository creation. If the
returned dict contains any items, repository creation will not
be allowed, as it means there was a request to create a repository
with options not recognized by loaded code.
Extensions can wrap this function to filter out creation options
they know how to handle.
"""
known = {'narrowfiles'}
return {k: v for k, v in createopts.items() if k not in known}
def createrepository(ui, path, createopts=None):
"""Create a new repository in a vfs.
``path`` path to the new repo's working directory.
``createopts`` options for the new repository.
"""
createopts = createopts or {}
unknownopts = filterknowncreateopts(ui, createopts)
if not isinstance(unknownopts, dict):
raise error.ProgrammingError('filterknowncreateopts() did not return '
'a dict')
if unknownopts:
raise error.Abort(_('unable to create repository because of unknown '
'creation option: %s') %
', '.sorted(unknownopts),
hint=_('is a required extension not loaded?'))
requirements = newreporequirements(ui, createopts=createopts)
wdirvfs = vfsmod.vfs(path, expandpath=True, realpath=True)
if not wdirvfs.exists():
wdirvfs.makedirs()
hgvfs = vfsmod.vfs(wdirvfs.join(b'.hg'))
if hgvfs.exists():
raise error.RepoError(_('repository %s already exists') % path)
hgvfs.makedir(notindexed=True)
if b'store' in requirements:
hgvfs.mkdir(b'store')
# We create an invalid changelog outside the store so very old
# Mercurial versions (which didn't know about the requirements
# file) encounter an error on reading the changelog. This
# effectively locks out old clients and prevents them from
# mucking with a repo in an unknown format.
#
# The revlog header has version 2, which won't be recognized by
# such old clients.
hgvfs.append(b'00changelog.i',
b'\0\0\0\2 dummy changelog to prevent using the old repo '
b'layout')
scmutil.writerequires(hgvfs, requirements)
def poisonrepository(repo):
"""Poison a repository instance so it can no longer be used."""
# Perform any cleanup on the instance.
repo.close()
# Our strategy is to replace the type of the object with one that
# has all attribute lookups result in error.
#
# But we have to allow the close() method because some constructors
# of repos call close() on repo references.
class poisonedrepository(object):
def __getattribute__(self, item):
if item == r'close':
return object.__getattribute__(self, item)
raise error.ProgrammingError('repo instances should not be used '
'after unshare')
def close(self):
pass
# We may have a repoview, which intercepts __setattr__. So be sure
# we operate at the lowest level possible.
object.__setattr__(repo, r'__class__', poisonedrepository)