requirements: introduce new requirements related module
It was not clear where all requirements should and related APIs should be, this
patch introduces a requirements module which will have all exitsing requirements
and related APIs.
Differential Revision: https://phab.mercurial-scm.org/D8917
# 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 os
import random
import sys
import time
import weakref
from .i18n import _
from .node import (
bin,
hex,
nullid,
nullrev,
short,
)
from .pycompat import (
delattr,
getattr,
)
from . import (
bookmarks,
branchmap,
bundle2,
changegroup,
color,
commit,
context,
dirstate,
dirstateguard,
discovery,
encoding,
error,
exchange,
extensions,
filelog,
hook,
lock as lockmod,
match as matchmod,
mergestate as mergestatemod,
mergeutil,
namespaces,
narrowspec,
obsolete,
pathutil,
phases,
pushkey,
pycompat,
rcutil,
repoview,
requirements as requirementsmod,
revset,
revsetlang,
scmutil,
sparse,
store as storemod,
subrepoutil,
tags as tagsmod,
transaction,
txnutil,
util,
vfs as vfsmod,
)
from .interfaces import (
repository,
util as interfaceutil,
)
from .utils import (
hashutil,
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
# proxy to unfiltered __dict__ since filtered repo has no entry
unfi = repo.unfiltered()
try:
return unfi.__dict__[self.sname]
except KeyError:
pass
return super(_basefilecache, self).__get__(unfi, type)
def set(self, repo, value):
return super(_basefilecache, self).set(repo.unfiltered(), value)
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, b'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, b''))
def join(self, obj, fname):
return obj.sjoin(fname)
class mixedrepostorecache(_basefilecache):
"""filecache for a mix files in .hg/store and outside"""
def __init__(self, *pathsandlocations):
# scmutil.filecache only uses the path for passing back into our
# join(), so we can safely pass a list of paths and locations
super(mixedrepostorecache, self).__init__(*pathsandlocations)
_cachedfiles.update(pathsandlocations)
def join(self, obj, fnameandlocation):
fname, location = fnameandlocation
if location == b'plain':
return obj.vfs.join(fname)
else:
if location != b'':
raise error.ProgrammingError(
b'unexpected location: %s' % location
)
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 = {
b'lookup',
b'branchmap',
b'pushkey',
b'known',
b'getbundle',
b'unbundle',
}
legacycaps = moderncaps.union({b'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(
b'callcommand() cannot be used after sendcommands()'
)
if self._closed:
raise error.ProgrammingError(
b'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(b'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(b'clonebundles.manifest')
def debugwireargs(self, one, two, three=None, four=None, five=None):
"""Used to test argument passing over the wire"""
return b"%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(b'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(_(b'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, b'push', url)
if util.safehasattr(ret, b'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(
_(b'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, ancestorsof=self._repo.heads()
)
return changegroup.makechangegroup(self._repo, outgoing, b'01', source)
def changegroupsubset(self, bases, heads, source):
outgoing = discovery.outgoing(
self._repo, missingroots=bases, ancestorsof=heads
)
return changegroup.makechangegroup(self._repo, outgoing, b'01', source)
# End of baselegacywirecommands interface.
# Increment the sub-version when the revlog v2 format changes to lock out old
# clients.
REVLOGV2_REQUIREMENT = b'exp-revlogv2.1'
# 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 = b'sparserevlog'
# A repository with the sidedataflag requirement will allow to store extra
# information for revision without altering their original hashes.
SIDEDATA_REQUIREMENT = b'exp-sidedata-flag'
# A repository with the the copies-sidedata-changeset requirement will store
# copies related information in changeset's sidedata.
COPIESSDC_REQUIREMENT = b'exp-copies-sidedata-changeset'
# The repository use persistent nodemap for the changelog and the manifest.
NODEMAP_REQUIREMENT = b'persistent-nodemap'
# 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 _getsharedvfs(hgvfs, requirements):
""" returns the vfs object pointing to root of shared source
repo for a shared repository
hgvfs is vfs pointing at .hg/ of current repo (shared one)
requirements is a set of requirements of current repo (shared one)
"""
# The ``shared`` or ``relshared`` requirements indicate the
# store lives in the path contained in the ``.hg/sharedpath`` file.
# This is an absolute path for ``shared`` and relative to
# ``.hg/`` for ``relshared``.
sharedpath = hgvfs.read(b'sharedpath').rstrip(b'\n')
if b'relshared' in requirements:
sharedpath = hgvfs.join(sharedpath)
sharedvfs = vfsmod.vfs(sharedpath, realpath=True)
if not sharedvfs.exists():
raise error.RepoError(
_(b'.hg/sharedpath points to nonexistent directory %s')
% sharedvfs.base
)
return sharedvfs
def _readrequires(vfs, allowmissing):
""" reads the require file present at root of this vfs
and return a set of requirements
If allowmissing is True, we suppress ENOENT if raised"""
# requires file contains a newline-delimited list of
# features/capabilities the opener (us) must have in order to use
# the repository. This file was introduced in Mercurial 0.9.2,
# which means very old repositories may not have one. We assume
# a missing file translates to no requirements.
try:
requirements = set(vfs.read(b'requires').splitlines())
except IOError as e:
if not (allowmissing and e.errno == errno.ENOENT):
raise
requirements = set()
return requirements
def makelocalrepository(baseui, path, intents=None):
"""Create a local repository object.
Given arguments needed to construct a local repository, this function
performs various early repository loading functionality (such as
reading the ``.hg/requires`` and ``.hg/hgrc`` files), validates that
the repository can be opened, derives a type suitable for representing
that repository, and returns an instance of it.
The returned object conforms to the ``repository.completelocalrepository``
interface.
The repository type is derived by calling a series of factory functions
for each aspect/interface of the final repository. These are defined by
``REPO_INTERFACES``.
Each factory function is called to produce a type implementing a specific
interface. The cumulative list of returned types will be combined into a
new type and that type will be instantiated to represent the local
repository.
The factory functions each receive various state that may be consulted
as part of deriving a type.
Extensions should wrap these factory functions to customize repository type
creation. Note that an extension's wrapped function may be called even if
that extension is not loaded for the repo being constructed. Extensions
should check if their ``__name__`` appears in the
``extensionmodulenames`` set passed to the factory function and no-op if
not.
"""
ui = baseui.copy()
# Prevent copying repo configuration.
ui.copy = baseui.copy
# 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)
# Whether this repository is shared one or not
shared = False
# If this repository is shared, vfs pointing to shared repo
sharedvfs = None
# The .hg/ path should exist and should be a directory. All other
# cases are errors.
if not hgvfs.isdir():
try:
hgvfs.stat()
except OSError as e:
if e.errno != errno.ENOENT:
raise
except ValueError as e:
# Can be raised on Python 3.8 when path is invalid.
raise error.Abort(
_(b'invalid path %s: %s') % (path, pycompat.bytestr(e))
)
raise error.RepoError(_(b'repository %s not found') % path)
requirements = _readrequires(hgvfs, True)
# The .hg/hgrc file may load extensions or contain config options
# that influence repository construction. Attempt to load it and
# process any new extensions that it may have pulled in.
if loadhgrc(ui, wdirvfs, hgvfs, requirements):
afterhgrcload(ui, wdirvfs, hgvfs, requirements)
extensions.loadall(ui)
extensions.populateui(ui)
# Set of module names of extensions loaded for this repository.
extensionmodulenames = {m.__name__ for n, m in extensions.extensions(ui)}
supportedrequirements = gathersupportedrequirements(ui)
# We first validate the requirements are known.
ensurerequirementsrecognized(requirements, supportedrequirements)
# Then we validate that the known set is reasonable to use together.
ensurerequirementscompatible(ui, requirements)
# TODO there are unhandled edge cases related to opening repositories with
# shared storage. If storage is shared, we should also test for requirements
# compatibility in the pointed-to repo. This entails loading the .hg/hgrc in
# that repo, as that repo may load extensions needed to open it. This is a
# bit complicated because we don't want the other hgrc to overwrite settings
# in this hgrc.
#
# This bug is somewhat mitigated by the fact that we copy the .hg/requires
# file when sharing repos. But if a requirement is added after the share is
# performed, thereby introducing a new requirement for the opener, we may
# will not see that and could encounter a run-time error interacting with
# that shared store since it has an unknown-to-us requirement.
# At this point, we know we should be capable of opening the repository.
# Now get on with doing that.
features = set()
# The "store" part of the repository holds versioned data. How it is
# accessed is determined by various requirements. If `shared` or
# `relshared` requirements are present, this indicates current repository
# is a share and store exists in path mentioned in `.hg/sharedpath`
shared = b'shared' in requirements or b'relshared' in requirements
if shared:
sharedvfs = _getsharedvfs(hgvfs, requirements)
storebasepath = sharedvfs.base
cachepath = sharedvfs.join(b'cache')
features.add(repository.REPO_FEATURE_SHARED_STORAGE)
else:
storebasepath = hgvfs.base
cachepath = hgvfs.join(b'cache')
wcachepath = hgvfs.join(b'wcache')
# The store has changed over time and the exact layout is dictated by
# requirements. The store interface abstracts differences across all
# of them.
store = makestore(
requirements,
storebasepath,
lambda base: vfsmod.vfs(base, cacheaudited=True),
)
hgvfs.createmode = store.createmode
storevfs = store.vfs
storevfs.options = resolvestorevfsoptions(ui, requirements, features)
# The cache vfs is used to manage cache files.
cachevfs = vfsmod.vfs(cachepath, cacheaudited=True)
cachevfs.createmode = store.createmode
# The cache vfs is used to manage cache files related to the working copy
wcachevfs = vfsmod.vfs(wcachepath, cacheaudited=True)
wcachevfs.createmode = store.createmode
# Now resolve the type for the repository object. We do this by repeatedly
# calling a factory function to produces types for specific aspects of the
# repo's operation. The aggregate returned types are used as base classes
# for a dynamically-derived type, which will represent our new repository.
bases = []
extrastate = {}
for iface, fn in REPO_INTERFACES:
# We pass all potentially useful state to give extensions tons of
# flexibility.
typ = fn()(
ui=ui,
intents=intents,
requirements=requirements,
features=features,
wdirvfs=wdirvfs,
hgvfs=hgvfs,
store=store,
storevfs=storevfs,
storeoptions=storevfs.options,
cachevfs=cachevfs,
wcachevfs=wcachevfs,
extensionmodulenames=extensionmodulenames,
extrastate=extrastate,
baseclasses=bases,
)
if not isinstance(typ, type):
raise error.ProgrammingError(
b'unable to construct type for %s' % iface
)
bases.append(typ)
# type() allows you to use characters in type names that wouldn't be
# recognized as Python symbols in source code. We abuse that to add
# rich information about our constructed repo.
name = pycompat.sysstr(
b'derivedrepo:%s<%s>' % (wdirvfs.base, b','.join(sorted(requirements)))
)
cls = type(name, tuple(bases), {})
return cls(
baseui=baseui,
ui=ui,
origroot=path,
wdirvfs=wdirvfs,
hgvfs=hgvfs,
requirements=requirements,
supportedrequirements=supportedrequirements,
sharedpath=storebasepath,
store=store,
cachevfs=cachevfs,
wcachevfs=wcachevfs,
features=features,
intents=intents,
)
def loadhgrc(ui, wdirvfs, hgvfs, requirements):
"""Load hgrc files/content into a ui instance.
This is called during repository opening to load any additional
config files or settings relevant to the current repository.
Returns a bool indicating whether any additional configs were loaded.
Extensions should monkeypatch this function to modify how per-repo
configs are loaded. For example, an extension may wish to pull in
configs from alternate files or sources.
"""
if not rcutil.use_repo_hgrc():
return False
try:
ui.readconfig(hgvfs.join(b'hgrc'), root=wdirvfs.base)
return True
except IOError:
return False
def afterhgrcload(ui, wdirvfs, hgvfs, requirements):
"""Perform additional actions after .hg/hgrc is loaded.
This function is called during repository loading immediately after
the .hg/hgrc file is loaded and before per-repo extensions are loaded.
The function can be used to validate configs, automatically add
options (including extensions) based on requirements, etc.
"""
# Map of requirements to list of extensions to load automatically when
# requirement is present.
autoextensions = {
b'git': [b'git'],
b'largefiles': [b'largefiles'],
b'lfs': [b'lfs'],
}
for requirement, names in sorted(autoextensions.items()):
if requirement not in requirements:
continue
for name in names:
if not ui.hasconfig(b'extensions', name):
ui.setconfig(b'extensions', name, b'', source=b'autoload')
def gathersupportedrequirements(ui):
"""Determine the complete set of recognized requirements."""
# Start with all requirements supported by this file.
supported = set(localrepository._basesupported)
# Execute ``featuresetupfuncs`` entries if they belong to an extension
# relevant to this ui instance.
modules = {m.__name__ for n, m in extensions.extensions(ui)}
for fn in featuresetupfuncs:
if fn.__module__ in modules:
fn(ui, supported)
# Add derived requirements from registered compression engines.
for name in util.compengines:
engine = util.compengines[name]
if engine.available() and engine.revlogheader():
supported.add(b'exp-compression-%s' % name)
if engine.name() == b'zstd':
supported.add(b'revlog-compression-zstd')
return supported
def ensurerequirementsrecognized(requirements, supported):
"""Validate that a set of local requirements is recognized.
Receives a set of requirements. Raises an ``error.RepoError`` if there
exists any requirement in that set that currently loaded code doesn't
recognize.
Returns a set of supported requirements.
"""
missing = set()
for requirement in requirements:
if requirement in supported:
continue
if not requirement or not requirement[0:1].isalnum():
raise error.RequirementError(_(b'.hg/requires file is corrupt'))
missing.add(requirement)
if missing:
raise error.RequirementError(
_(b'repository requires features unknown to this Mercurial: %s')
% b' '.join(sorted(missing)),
hint=_(
b'see https://mercurial-scm.org/wiki/MissingRequirement '
b'for more information'
),
)
def ensurerequirementscompatible(ui, requirements):
"""Validates that a set of recognized requirements is mutually compatible.
Some requirements may not be compatible with others or require
config options that aren't enabled. This function is called during
repository opening to ensure that the set of requirements needed
to open a repository is sane and compatible with config options.
Extensions can monkeypatch this function to perform additional
checking.
``error.RepoError`` should be raised on failure.
"""
if (
requirementsmod.SPARSE_REQUIREMENT in requirements
and not sparse.enabled
):
raise error.RepoError(
_(
b'repository is using sparse feature but '
b'sparse is not enabled; enable the '
b'"sparse" extensions to access'
)
)
def makestore(requirements, path, vfstype):
"""Construct a storage object for a repository."""
if b'store' in requirements:
if b'fncache' in requirements:
return storemod.fncachestore(
path, vfstype, b'dotencode' in requirements
)
return storemod.encodedstore(path, vfstype)
return storemod.basicstore(path, vfstype)
def resolvestorevfsoptions(ui, requirements, features):
"""Resolve the options to pass to the store vfs opener.
The returned dict is used to influence behavior of the storage layer.
"""
options = {}
if requirementsmod.TREEMANIFEST_REQUIREMENT in requirements:
options[b'treemanifest'] = True
# experimental config: format.manifestcachesize
manifestcachesize = ui.configint(b'format', b'manifestcachesize')
if manifestcachesize is not None:
options[b'manifestcachesize'] = manifestcachesize
# In the absence of another requirement superseding a revlog-related
# requirement, we have to assume the repo is using revlog version 0.
# This revlog format is super old and we don't bother trying to parse
# opener options for it because those options wouldn't do anything
# meaningful on such old repos.
if b'revlogv1' in requirements or REVLOGV2_REQUIREMENT in requirements:
options.update(resolverevlogstorevfsoptions(ui, requirements, features))
else: # explicitly mark repo as using revlogv0
options[b'revlogv0'] = True
if COPIESSDC_REQUIREMENT in requirements:
options[b'copies-storage'] = b'changeset-sidedata'
else:
writecopiesto = ui.config(b'experimental', b'copies.write-to')
copiesextramode = (b'changeset-only', b'compatibility')
if writecopiesto in copiesextramode:
options[b'copies-storage'] = b'extra'
return options
def resolverevlogstorevfsoptions(ui, requirements, features):
"""Resolve opener options specific to revlogs."""
options = {}
options[b'flagprocessors'] = {}
if b'revlogv1' in requirements:
options[b'revlogv1'] = True
if REVLOGV2_REQUIREMENT in requirements:
options[b'revlogv2'] = True
if b'generaldelta' in requirements:
options[b'generaldelta'] = True
# experimental config: format.chunkcachesize
chunkcachesize = ui.configint(b'format', b'chunkcachesize')
if chunkcachesize is not None:
options[b'chunkcachesize'] = chunkcachesize
deltabothparents = ui.configbool(
b'storage', b'revlog.optimize-delta-parent-choice'
)
options[b'deltabothparents'] = deltabothparents
lazydelta = ui.configbool(b'storage', b'revlog.reuse-external-delta')
lazydeltabase = False
if lazydelta:
lazydeltabase = ui.configbool(
b'storage', b'revlog.reuse-external-delta-parent'
)
if lazydeltabase is None:
lazydeltabase = not scmutil.gddeltaconfig(ui)
options[b'lazydelta'] = lazydelta
options[b'lazydeltabase'] = lazydeltabase
chainspan = ui.configbytes(b'experimental', b'maxdeltachainspan')
if 0 <= chainspan:
options[b'maxdeltachainspan'] = chainspan
mmapindexthreshold = ui.configbytes(b'experimental', b'mmapindexthreshold')
if mmapindexthreshold is not None:
options[b'mmapindexthreshold'] = mmapindexthreshold
withsparseread = ui.configbool(b'experimental', b'sparse-read')
srdensitythres = float(
ui.config(b'experimental', b'sparse-read.density-threshold')
)
srmingapsize = ui.configbytes(b'experimental', b'sparse-read.min-gap-size')
options[b'with-sparse-read'] = withsparseread
options[b'sparse-read-density-threshold'] = srdensitythres
options[b'sparse-read-min-gap-size'] = srmingapsize
sparserevlog = SPARSEREVLOG_REQUIREMENT in requirements
options[b'sparse-revlog'] = sparserevlog
if sparserevlog:
options[b'generaldelta'] = True
sidedata = SIDEDATA_REQUIREMENT in requirements
options[b'side-data'] = sidedata
maxchainlen = None
if sparserevlog:
maxchainlen = revlogconst.SPARSE_REVLOG_MAX_CHAIN_LENGTH
# experimental config: format.maxchainlen
maxchainlen = ui.configint(b'format', b'maxchainlen', maxchainlen)
if maxchainlen is not None:
options[b'maxchainlen'] = maxchainlen
for r in requirements:
# we allow multiple compression engine requirement to co-exist because
# strickly speaking, revlog seems to support mixed compression style.
#
# The compression used for new entries will be "the last one"
prefix = r.startswith
if prefix(b'revlog-compression-') or prefix(b'exp-compression-'):
options[b'compengine'] = r.split(b'-', 2)[2]
options[b'zlib.level'] = ui.configint(b'storage', b'revlog.zlib.level')
if options[b'zlib.level'] is not None:
if not (0 <= options[b'zlib.level'] <= 9):
msg = _(b'invalid value for `storage.revlog.zlib.level` config: %d')
raise error.Abort(msg % options[b'zlib.level'])
options[b'zstd.level'] = ui.configint(b'storage', b'revlog.zstd.level')
if options[b'zstd.level'] is not None:
if not (0 <= options[b'zstd.level'] <= 22):
msg = _(b'invalid value for `storage.revlog.zstd.level` config: %d')
raise error.Abort(msg % options[b'zstd.level'])
if requirementsmod.NARROW_REQUIREMENT in requirements:
options[b'enableellipsis'] = True
if ui.configbool(b'experimental', b'rust.index'):
options[b'rust.index'] = True
if NODEMAP_REQUIREMENT in requirements:
options[b'persistent-nodemap'] = True
if ui.configbool(b'storage', b'revlog.nodemap.mmap'):
options[b'persistent-nodemap.mmap'] = True
epnm = ui.config(b'storage', b'revlog.nodemap.mode')
options[b'persistent-nodemap.mode'] = epnm
if ui.configbool(b'devel', b'persistent-nodemap'):
options[b'devel-force-nodemap'] = True
return options
def makemain(**kwargs):
"""Produce a type conforming to ``ilocalrepositorymain``."""
return localrepository
@interfaceutil.implementer(repository.ilocalrepositoryfilestorage)
class revlogfilestorage(object):
"""File storage when using revlogs."""
def file(self, path):
if path[0] == b'/':
path = path[1:]
return filelog.filelog(self.svfs, path)
@interfaceutil.implementer(repository.ilocalrepositoryfilestorage)
class revlognarrowfilestorage(object):
"""File storage when using revlogs and narrow files."""
def file(self, path):
if path[0] == b'/':
path = path[1:]
return filelog.narrowfilelog(self.svfs, path, self._storenarrowmatch)
def makefilestorage(requirements, features, **kwargs):
"""Produce a type conforming to ``ilocalrepositoryfilestorage``."""
features.add(repository.REPO_FEATURE_REVLOG_FILE_STORAGE)
features.add(repository.REPO_FEATURE_STREAM_CLONE)
if requirementsmod.NARROW_REQUIREMENT in requirements:
return revlognarrowfilestorage
else:
return revlogfilestorage
# List of repository interfaces and factory functions for them. Each
# will be called in order during ``makelocalrepository()`` to iteratively
# derive the final type for a local repository instance. We capture the
# function as a lambda so we don't hold a reference and the module-level
# functions can be wrapped.
REPO_INTERFACES = [
(repository.ilocalrepositorymain, lambda: makemain),
(repository.ilocalrepositoryfilestorage, lambda: makefilestorage),
]
@interfaceutil.implementer(repository.ilocalrepositorymain)
class localrepository(object):
"""Main class for representing local repositories.
All local repositories are instances of this class.
Constructed on its own, instances of this class are not usable as
repository objects. To obtain a usable repository object, call
``hg.repository()``, ``localrepo.instance()``, or
``localrepo.makelocalrepository()``. The latter is the lowest-level.
``instance()`` adds support for creating new repositories.
``hg.repository()`` adds more extension integration, including calling
``reposetup()``. Generally speaking, ``hg.repository()`` should be
used.
"""
# 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 = {
b'revlogv1',
b'generaldelta',
requirementsmod.TREEMANIFEST_REQUIREMENT,
COPIESSDC_REQUIREMENT,
REVLOGV2_REQUIREMENT,
SIDEDATA_REQUIREMENT,
SPARSEREVLOG_REQUIREMENT,
NODEMAP_REQUIREMENT,
bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT,
}
_basesupported = supportedformats | {
b'store',
b'fncache',
b'shared',
b'relshared',
b'dotencode',
requirementsmod.SPARSE_REQUIREMENT,
requirementsmod.INTERNAL_PHASE_REQUIREMENT,
}
# 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.
b'hgrc',
b'requires',
# XXX cache is a complicatged business someone
# should investigate this in depth at some point
b'cache/',
# XXX shouldn't be dirstate covered by the wlock?
b'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
b'bisect.state',
}
def __init__(
self,
baseui,
ui,
origroot,
wdirvfs,
hgvfs,
requirements,
supportedrequirements,
sharedpath,
store,
cachevfs,
wcachevfs,
features,
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 that ``ui`` argument was based off of.
ui
``ui.ui`` instance for use by the repository.
origroot
``bytes`` path to working directory root of this repository.
wdirvfs
``vfs.vfs`` rooted at the working directory.
hgvfs
``vfs.vfs`` rooted at .hg/
requirements
``set`` of bytestrings representing repository opening requirements.
supportedrequirements
``set`` of bytestrings representing repository requirements that we
know how to open. May be a supetset of ``requirements``.
sharedpath
``bytes`` Defining path to storage base directory. Points to a
``.hg/`` directory somewhere.
store
``store.basicstore`` (or derived) instance providing access to
versioned storage.
cachevfs
``vfs.vfs`` used for cache files.
wcachevfs
``vfs.vfs`` used for cache files related to the working copy.
features
``set`` of bytestrings defining features/capabilities of this
instance.
intents
``set`` of system strings indicating what this repo will be used
for.
"""
self.baseui = baseui
self.ui = ui
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 = requirements
self.supported = supportedrequirements
self.sharedpath = sharedpath
self.store = store
self.cachevfs = cachevfs
self.wcachevfs = wcachevfs
self.features = features
self.filtername = None
if self.ui.configbool(b'devel', b'all-warnings') or self.ui.configbool(
b'devel', b'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 = []
color.setup(self.ui)
self.spath = self.store.path
self.svfs = self.store.vfs
self.sjoin = self.store.join
if self.ui.configbool(b'devel', b'all-warnings') or self.ui.configbool(
b'devel', b'check-locks'
):
if util.safehasattr(self.svfs, b'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._dirstatevalidatewarned = False
self._branchcaches = branchmap.BranchMapCache()
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 = {}
self._extrafilterid = repoview.extrafilter(ui)
self.filecopiesmode = None
if COPIESSDC_REQUIREMENT in self.requirements:
self.filecopiesmode = b'changeset-sidedata'
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, b'_wlockref')
or not util.safehasattr(repo, b'_lockref')
):
return
if mode in (None, b'r', b'rb'):
return
if path.startswith(repo.path):
# truncate name relative to the repository (.hg)
path = path[len(repo.path) + 1 :]
if path.startswith(b'cache/'):
msg = b'accessing cache with vfs instead of cachevfs: "%s"'
repo.ui.develwarn(msg % path, stacklevel=3, config=b"cache-vfs")
# path prefixes covered by 'lock'
vfs_path_prefixes = (b'journal.', b'undo.', b'strip-backup/')
if any(path.startswith(prefix) for prefix in vfs_path_prefixes):
if repo._currentlock(repo._lockref) is None:
repo.ui.develwarn(
b'write with no lock: "%s"' % path,
stacklevel=3,
config=b'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(
b'write with no wlock: "%s"' % path,
stacklevel=3,
config=b'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, b'_lockref'):
return
if mode in (None, b'r', b'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(
b'write with no lock: "%s"' % path, stacklevel=4
)
return ret
return checksvfs
def close(self):
self._writecaches()
def _writecaches(self):
if self._revbranchcache:
self._revbranchcache.write()
def _restrictcapabilities(self, caps):
if self.ui.configbool(b'experimental', b'bundle2-advertise'):
caps = set(caps)
capsblob = bundle2.encodecaps(
bundle2.getrepocaps(self, role=b'client')
)
caps.add(b'bundle2=' + urlreq.quote(capsblob))
return caps
# 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 = b'/'.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
The `name` parameter is the identifier of the requested view. This
will return a repoview object set "exactly" to the specified view.
This function does not apply recursive filtering to a repository. For
example calling `repo.filtered("served")` will return a repoview using
the "served" view, regardless of the initial view used by `repo`.
In other word, there is always only one level of `repoview` "filtering".
"""
if self._extrafilterid is not None and b'%' not in name:
name = name + b'%' + self._extrafilterid
cls = repoview.newtype(self.unfiltered().__class__)
return cls(self, name, visibilityexceptions)
@mixedrepostorecache(
(b'bookmarks', b'plain'),
(b'bookmarks.current', b'plain'),
(b'bookmarks', b''),
(b'00changelog.i', b''),
)
def _bookmarks(self):
# Since the multiple files involved in the transaction cannot be
# written atomically (with current repository format), there is a race
# condition here.
#
# 1) changelog content A is read
# 2) outside transaction update changelog to content B
# 3) outside transaction update bookmark file referring to content B
# 4) bookmarks file content is read and filtered against changelog-A
#
# When this happens, bookmarks against nodes missing from A are dropped.
#
# Having this happening during read is not great, but it become worse
# when this happen during write because the bookmarks to the "unknown"
# nodes will be dropped for good. However, writes happen within locks.
# This locking makes it possible to have a race free consistent read.
# For this purpose data read from disc before locking are
# "invalidated" right after the locks are taken. This invalidations are
# "light", the `filecache` mechanism keep the data in memory and will
# reuse them if the underlying files did not changed. Not parsing the
# same data multiple times helps performances.
#
# Unfortunately in the case describe above, the files tracked by the
# bookmarks file cache might not have changed, but the in-memory
# content is still "wrong" because we used an older changelog content
# to process the on-disk data. So after locking, the changelog would be
# refreshed but `_bookmarks` would be preserved.
# Adding `00changelog.i` to the list of tracked file is not
# enough, because at the time we build the content for `_bookmarks` in
# (4), the changelog file has already diverged from the content used
# for loading `changelog` in (1)
#
# To prevent the issue, we force the changelog to be explicitly
# reloaded while computing `_bookmarks`. The data race can still happen
# without the lock (with a narrower window), but it would no longer go
# undetected during the lock time refresh.
#
# The new schedule is as follow
#
# 1) filecache logic detect that `_bookmarks` needs to be computed
# 2) cachestat for `bookmarks` and `changelog` are captured (for book)
# 3) We force `changelog` filecache to be tested
# 4) cachestat for `changelog` are captured (for changelog)
# 5) `_bookmarks` is computed and cached
#
# The step in (3) ensure we have a changelog at least as recent as the
# cache stat computed in (1). As a result at locking time:
# * if the changelog did not changed since (1) -> we can reuse the data
# * otherwise -> the bookmarks get refreshed.
self._refreshchangelog()
return bookmarks.bmstore(self)
def _refreshchangelog(self):
"""make sure the in memory changelog match the on-disk one"""
if 'changelog' in vars(self) and self.currenttransaction() is None:
del self.changelog
@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(b'phaseroots', b'00changelog.i')
def _phasecache(self):
return phases.phasecache(self, self._phasedefaults)
@storecache(b'obsstore')
def obsstore(self):
return obsolete.makestore(self.ui, self)
@storecache(b'00changelog.i')
def changelog(self):
# load dirstate before changelog to avoid race see issue6303
self.dirstate.prefetch_parents()
return self.store.changelog(txnutil.mayhavepending(self.root))
@storecache(b'00manifest.i')
def manifestlog(self):
return self.store.manifestlog(self, self._storenarrowmatch)
@repofilecache(b'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(
_(b"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).
"""
return narrowspec.load(self)
@storecache(narrowspec.FILENAME)
def _storenarrowmatch(self):
if requirementsmod.NARROW_REQUIREMENT not in self.requirements:
return matchmod.always()
include, exclude = self.narrowpats
return narrowspec.match(self.root, include=include, exclude=exclude)
@storecache(narrowspec.FILENAME)
def _narrowmatch(self):
if requirementsmod.NARROW_REQUIREMENT not in self.requirements:
return matchmod.always()
narrowspec.checkworkingcopynarrowspec(self)
include, exclude = self.narrowpats
return narrowspec.match(self.root, include=include, exclude=exclude)
def narrowmatch(self, match=None, includeexact=False):
"""matcher corresponding the the repo's narrowspec
If `match` is given, then that will be intersected with the narrow
matcher.
If `includeexact` is True, then any exact matches from `match` will
be included even if they're outside the narrowspec.
"""
if match:
if includeexact and not self._narrowmatch.always():
# do not exclude explicitly-specified paths so that they can
# be warned later on
em = matchmod.exact(match.files())
nm = matchmod.unionmatcher([self._narrowmatch, em])
return matchmod.intersectmatchers(match, nm)
return matchmod.intersectmatchers(match, self._narrowmatch)
return self._narrowmatch
def setnarrowpats(self, newincludes, newexcludes):
narrowspec.save(self, newincludes, newexcludes)
self.invalidate(clearfilecache=True)
@unfilteredpropertycache
def _quick_access_changeid_null(self):
return {
b'null': (nullrev, nullid),
nullrev: (nullrev, nullid),
nullid: (nullrev, nullid),
}
@unfilteredpropertycache
def _quick_access_changeid_wc(self):
# also fast path access to the working copy parents
# however, only do it for filter that ensure wc is visible.
quick = {}
cl = self.unfiltered().changelog
for node in self.dirstate.parents():
if node == nullid:
continue
rev = cl.index.get_rev(node)
if rev is None:
# unknown working copy parent case:
#
# skip the fast path and let higher code deal with it
continue
pair = (rev, node)
quick[rev] = pair
quick[node] = pair
# also add the parents of the parents
for r in cl.parentrevs(rev):
if r == nullrev:
continue
n = cl.node(r)
pair = (r, n)
quick[r] = pair
quick[n] = pair
p1node = self.dirstate.p1()
if p1node != nullid:
quick[b'.'] = quick[p1node]
return quick
@unfilteredmethod
def _quick_access_changeid_invalidate(self):
if '_quick_access_changeid_wc' in vars(self):
del self.__dict__['_quick_access_changeid_wc']
@property
def _quick_access_changeid(self):
"""an helper dictionnary for __getitem__ calls
This contains a list of symbol we can recognise right away without
further processing.
"""
mapping = self._quick_access_changeid_null
if self.filtername in repoview.filter_has_wc:
mapping = mapping.copy()
mapping.update(self._quick_access_changeid_wc)
return mapping
def __getitem__(self, changeid):
# dealing with special cases
if changeid is None:
return context.workingctx(self)
if isinstance(changeid, context.basectx):
return changeid
# dealing with multiple revisions
if isinstance(changeid, slice):
# wdirrev isn't contiguous so the slice shouldn't include it
return [
self[i]
for i in pycompat.xrange(*changeid.indices(len(self)))
if i not in self.changelog.filteredrevs
]
# dealing with some special values
quick_access = self._quick_access_changeid.get(changeid)
if quick_access is not None:
rev, node = quick_access
return context.changectx(self, rev, node, maybe_filtered=False)
if changeid == b'tip':
node = self.changelog.tip()
rev = self.changelog.rev(node)
return context.changectx(self, rev, node)
# dealing with arbitrary values
try:
if isinstance(changeid, int):
node = self.changelog.node(changeid)
rev = changeid
elif changeid == b'.':
# this is a hack to delay/avoid loading obsmarkers
# when we know that '.' won't be hidden
node = self.dirstate.p1()
rev = self.unfiltered().changelog.rev(node)
elif len(changeid) == 20:
try:
node = changeid
rev = self.changelog.rev(changeid)
except error.FilteredLookupError:
changeid = hex(changeid) # for the error message
raise
except LookupError:
# check if it might have come from damaged dirstate
#
# XXX we could avoid the unfiltered if we had a recognizable
# exception for filtered changeset access
if (
self.local()
and changeid in self.unfiltered().dirstate.parents()
):
msg = _(b"working directory has unknown parent '%s'!")
raise error.Abort(msg % short(changeid))
changeid = hex(changeid) # for the error message
raise
elif len(changeid) == 40:
node = bin(changeid)
rev = self.changelog.rev(node)
else:
raise error.ProgrammingError(
b"unsupported changeid '%s' of type %s"
% (changeid, pycompat.bytestr(type(changeid)))
)
return context.changectx(self, rev, node)
except (error.FilteredIndexError, error.FilteredLookupError):
raise error.FilteredRepoLookupError(
_(b"filtered revision '%s'") % pycompat.bytestr(changeid)
)
except (IndexError, LookupError):
raise error.RepoLookupError(
_(b"unknown revision '%s'") % pycompat.bytestr(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 smartset.abstractsmartset, which is a list-like interface
that contains integer revisions.
'''
tree = revsetlang.spectree(expr, *args)
return revset.makematcher(tree)(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 specs == [b'null']:
return revset.baseset([nullrev])
if specs == [b'.']:
quick_data = self._quick_access_changeid.get(b'.')
if quick_data is not None:
return revset.baseset([quick_data[0]])
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 b'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
rev = self.changelog.rev
for k, v in pycompat.iteritems(tags):
try:
# ignore tags to unknown nodes
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 = {tag: b'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 pycompat.iteritems(alltags):
if node != nullid:
tags[encoding.tolocal(name)] = node
tags[b'tip'] = self.changelog.tip()
tagtypes = {
encoding.tolocal(name): value
for (name, value) in pycompat.iteritems(tagtypes)
}
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 pycompat.iteritems(self.tags()):
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 pycompat.iteritems(self._tagscache.tags):
nodetagscache.setdefault(n, []).append(t)
for tags in pycompat.itervalues(nodetagscache):
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'''
return self._branchcaches[self]
@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(_(b"unknown branch '%s'") % branch)
else:
pass
def lookup(self, key):
node = scmutil.revsymbol(self, key).node()
if node is None:
raise error.RepoLookupError(_(b"unknown revision '%s'") % key)
return node
def lookupbranch(self, key):
if self.branchmap().hasbranch(key):
return key
return scmutil.revsymbol(self, key).branch()
def known(self, nodes):
cl = self.changelog
get_rev = cl.index.get_rev
filtered = cl.filteredrevs
result = []
for n in nodes:
r = get_rev(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(b'phases', b'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(b'visible').changelog.filteredrevs
def shared(self):
'''the type of shared repository (None if not shared)'''
if self.sharedpath != self.path:
return b'store'
return None
def wjoin(self, f, *insidef):
return self.vfs.reljoin(self.root, f, *insidef)
def setparents(self, p1, p2=nullid):
self[None].setparents(p1, p2)
self._quick_access_changeid_invalidate()
def filectx(self, path, changeid=None, fileid=None, changectx=None):
"""changeid must be a changeset revision, if specified.
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 == b'!':
continue
mf = matchmod.match(self.root, b'', [pat])
fn = None
params = cmd
for name, filterfn in pycompat.iteritems(self._datafilters):
if cmd.startswith(name):
fn = filterfn
params = cmd[len(name) :].lstrip()
break
if not fn:
fn = lambda s, c, **kwargs: procutil.filter(s, c)
fn.__name__ = 'commandfilter'
# Wrap old filters not supporting keyword arguments
if not pycompat.getargspec(fn)[2]:
oldfn = fn
fn = lambda s, c, oldfn=oldfn, **kwargs: oldfn(s, c)
fn.__name__ = 'compat-' + oldfn.__name__
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(
b"filtering %s through %s\n"
% (filename, cmd or pycompat.sysbytes(fn.__name__))
)
data = fn(data, cmd, ui=self.ui, repo=self, filename=filename)
break
return data
@unfilteredpropertycache
def _encodefilterpats(self):
return self._loadfilter(b'encode')
@unfilteredpropertycache
def _decodefilterpats(self):
return self._loadfilter(b'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 b'l' in flags:
self.wvfs.symlink(data, filename)
else:
self.wvfs.write(
filename, data, backgroundclose=backgroundclose, **kwargs
)
if b'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(b'devel', b'all-warnings') or self.ui.configbool(
b'devel', b'check-locks'
):
if self._currentlock(self._lockref) is None:
raise error.ProgrammingError(b'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(b"journal"):
raise error.RepoError(
_(b"abandoned transaction found"),
hint=_(b"run 'hg recover' to clean up transaction"),
)
idbase = b"%.40f#%f" % (random.random(), time.time())
ha = hex(hashutil.sha1(idbase).digest())
txnid = b'TXN:' + ha
self.hook(b'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 = {b'plain': self.vfs, b'store': self.svfs} # 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(
b'experimental', b'hook-track-tags'
)
if desc != b'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[b'tag_moved'] = b'1'
with repo.vfs(
b'changes/tags.changes', b'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()
singleheadopt = (b'experimental', b'single-head-per-branch')
singlehead = repo.ui.configbool(*singleheadopt)
if singlehead:
singleheadsub = repo.ui.configsuboptions(*singleheadopt)[1]
accountclosed = singleheadsub.get(
b"account-closed-heads", False
)
scmutil.enforcesinglehead(repo, tr2, desc, accountclosed)
if hook.hashook(repo.ui, b'pretxnclose-bookmark'):
for name, (old, new) in sorted(
tr.changes[b'bookmarks'].items()
):
args = tr.hookargs.copy()
args.update(bookmarks.preparehookargs(name, old, new))
repo.hook(
b'pretxnclose-bookmark',
throw=True,
**pycompat.strkwargs(args)
)
if hook.hashook(repo.ui, b'pretxnclose-phase'):
cl = repo.unfiltered().changelog
for revs, (old, new) in tr.changes[b'phases']:
for rev in revs:
args = tr.hookargs.copy()
node = hex(cl.node(rev))
args.update(phases.preparehookargs(node, old, new))
repo.hook(
b'pretxnclose-phase',
throw=True,
**pycompat.strkwargs(args)
)
repo.hook(
b'pretxnclose', throw=True, **pycompat.strkwargs(tr.hookargs)
)
def releasefn(tr, success):
repo = reporef()
if repo is None:
# If the repo has been GC'd (and this release function is being
# called from transaction.__del__), there's not much we can do,
# so just leave the unfinished transaction there and let the
# user run `hg recover`.
return
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, b'journal.narrowspec')
narrowspec.restorewcbackup(self, b'journal.narrowspec.dirstate')
repo.dirstate.restorebackup(None, b'journal.dirstate')
repo.invalidate(clearfilecache=True)
tr = transaction.transaction(
rp,
self.svfs,
vfsmap,
b"journal",
b"undo",
aftertrans(renames),
self.store.createmode,
validator=validate,
releasefn=releasefn,
checkambigfiles=_cachedfiles,
name=desc,
)
tr.changes[b'origrepolen'] = len(self)
tr.changes[b'obsmarkers'] = set()
tr.changes[b'phases'] = []
tr.changes[b'bookmarks'] = {}
tr.hookargs[b'txnid'] = txnid
tr.hookargs[b'txnname'] = desc
tr.hookargs[b'changes'] = tr.changes
# 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(b'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(unused_success):
repo = reporef()
if hook.hashook(repo.ui, b'txnclose-bookmark'):
bmchanges = sorted(tr.changes[b'bookmarks'].items())
for name, (old, new) in bmchanges:
args = tr.hookargs.copy()
args.update(bookmarks.preparehookargs(name, old, new))
repo.hook(
b'txnclose-bookmark',
throw=False,
**pycompat.strkwargs(args)
)
if hook.hashook(repo.ui, b'txnclose-phase'):
cl = repo.unfiltered().changelog
phasemv = sorted(
tr.changes[b'phases'], key=lambda r: r[0][0]
)
for revs, (old, new) in phasemv:
for rev in revs:
args = tr.hookargs.copy()
node = hex(cl.node(rev))
args.update(phases.preparehookargs(node, old, new))
repo.hook(
b'txnclose-phase',
throw=False,
**pycompat.strkwargs(args)
)
repo.hook(
b'txnclose', throw=False, **pycompat.strkwargs(hookargs)
)
reporef()._afterlock(hookfunc)
tr.addfinalize(b'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(b'-warm-cache', self._buildcacheupdater(tr))
def txnaborthook(tr2):
"""To be run if transaction is aborted
"""
reporef().hook(
b'txnabort', throw=False, **pycompat.strkwargs(tr2.hookargs)
)
tr.addabort(b'txnabort-hook', txnaborthook)
# avoid eager cache invalidation. in-memory data should be identical
# to stored data if transaction has no error.
tr.addpostclose(b'refresh-filecachestats', self._refreshfilecachestats)
self._transref = weakref.ref(tr)
scmutil.registersummarycallback(self, tr, desc)
return tr
def _journalfiles(self):
return (
(self.svfs, b'journal'),
(self.svfs, b'journal.narrowspec'),
(self.vfs, b'journal.narrowspec.dirstate'),
(self.vfs, b'journal.dirstate'),
(self.vfs, b'journal.branch'),
(self.vfs, b'journal.desc'),
(bookmarks.bookmarksvfs(self), b'journal.bookmarks'),
(self.svfs, b'journal.phaseroots'),
)
def undofiles(self):
return [(vfs, undoname(x)) for vfs, x in self._journalfiles()]
@unfilteredmethod
def _writejournal(self, desc):
self.dirstate.savebackup(None, b'journal.dirstate')
narrowspec.savewcbackup(self, b'journal.narrowspec.dirstate')
narrowspec.savebackup(self, b'journal.narrowspec')
self.vfs.write(
b"journal.branch", encoding.fromlocal(self.dirstate.branch())
)
self.vfs.write(b"journal.desc", b"%d\n%s\n" % (len(self), desc))
bookmarksvfs = bookmarks.bookmarksvfs(self)
bookmarksvfs.write(
b"journal.bookmarks", bookmarksvfs.tryread(b"bookmarks")
)
self.svfs.write(b"journal.phaseroots", self.svfs.tryread(b"phaseroots"))
def recover(self):
with self.lock():
if self.svfs.exists(b"journal"):
self.ui.status(_(b"rolling back interrupted transaction\n"))
vfsmap = {
b'': self.svfs,
b'plain': self.vfs,
}
transaction.rollback(
self.svfs,
vfsmap,
b"journal",
self.ui.warn,
checkambigfiles=_cachedfiles,
)
self.invalidate()
return True
else:
self.ui.warn(_(b"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(b"undo"):
dsguard = dirstateguard.dirstateguard(self, b'rollback')
return self._rollback(dryrun, force, dsguard)
else:
self.ui.warn(_(b"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(b'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 = _(
b'repository tip rolled back to revision %d'
b' (undo %s: %s)\n'
) % (oldtip, desc, detail)
else:
msg = _(
b'repository tip rolled back to revision %d (undo %s)\n'
) % (oldtip, desc)
except IOError:
msg = _(b'rolling back unknown transaction\n')
desc = None
if not force and self[b'.'] != self[b'tip'] and desc == b'commit':
raise error.Abort(
_(
b'rollback of last commit while not checked out '
b'may lose data'
),
hint=_(b'use -f to force'),
)
ui.status(msg)
if dryrun:
return 0
parents = self.dirstate.parents()
self.destroying()
vfsmap = {b'plain': self.vfs, b'': self.svfs}
transaction.rollback(
self.svfs, vfsmap, b'undo', ui.warn, checkambigfiles=_cachedfiles
)
bookmarksvfs = bookmarks.bookmarksvfs(self)
if bookmarksvfs.exists(b'undo.bookmarks'):
bookmarksvfs.rename(
b'undo.bookmarks', b'bookmarks', checkambig=True
)
if self.svfs.exists(b'undo.phaseroots'):
self.svfs.rename(b'undo.phaseroots', b'phaseroots', checkambig=True)
self.invalidate()
has_node = self.changelog.index.has_node
parentgone = any(not has_node(p) for p in parents)
if parentgone:
# prevent dirstateguard from overwriting already restored one
dsguard.close()
narrowspec.restorebackup(self, b'undo.narrowspec')
narrowspec.restorewcbackup(self, b'undo.narrowspec.dirstate')
self.dirstate.restorebackup(None, b'undo.dirstate')
try:
branch = self.vfs.read(b'undo.branch')
self.dirstate.setbranch(encoding.tolocal(branch))
except IOError:
ui.warn(
_(
b'named branch could not be reset: '
b'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(
_(
b'working directory now based on '
b'revisions %d and %d\n'
)
% parents
)
else:
ui.status(
_(b'working directory now based on revision %d\n') % parents
)
mergestatemod.mergestate.clean(self, self[b'.'].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(b'source') == b'strip':
# During strip, many caches are invalid but
# later call to `destroyed` will refresh them.
return
if tr is None or tr.changes[b'origrepolen'] < len(self):
# accessing the 'ser ved' branchmap should refresh all the others,
self.ui.debug(b'updating the branch cache\n')
self.filtered(b'served').branchmap()
self.filtered(b'served.hidden').branchmap()
if full:
unfi = self.unfiltered()
self.changelog.update_caches(transaction=tr)
self.manifestlog.update_caches(transaction=tr)
rbc = unfi.revbranchcache()
for r in unfi.changelog:
rbc.branchinfo(r)
rbc.write()
# ensure the working copy parents are in the manifestfulltextcache
for ctx in self[b'.'].parents():
ctx.manifest() # accessing the manifest is enough
# accessing fnode cache warms the cache
tagsmod.fnoderevs(self.ui, unfi, unfi.changelog.revs())
# accessing tags warm the cache
self.tags()
self.filtered(b'served').tags()
# The `full` arg is documented as updating even the lazily-loaded
# caches immediately, so we're forcing a write to cause these caches
# to be warmed up even if they haven't explicitly been requested
# yet (if they've never been used by hg, they won't ever have been
# written, even if they're a subset of another kind of cache that
# *has* been used).
for filt in repoview.filtertable.keys():
filtered = self.filtered(filt)
filtered.branchmap().write(filtered)
def invalidatecaches(self):
if '_tagscache' in vars(self):
# can't use delattr on proxy
del self.__dict__['_tagscache']
self._branchcaches.clear()
self.invalidatevolatilesets()
self._sparsesignaturecache.clear()
def invalidatevolatilesets(self):
self.filteredrevcache.clear()
obsolete.clearobscaches(self)
self._quick_access_changeid_invalidate()
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 == b'dirstate':
continue
if (
k == b'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 == '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(b"ui", b"timeout")
warntimeout = self.ui.configint(b"ui", b"timeout.warn")
# internal config: ui.signal-safe-lock
signalsafe = self.ui.configbool(b'ui', b'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(True)
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(
vfs=self.svfs,
lockname=b"lock",
wait=wait,
releasefn=None,
acquirefn=self.invalidate,
desc=_(b'repository %s') % self.origroot,
)
self._lockref = weakref.ref(l)
return l
def _wlockchecktransaction(self):
if self.currenttransaction() is not None:
raise error.LockInheritanceContractViolation(
b'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(b'devel', b'all-warnings')
or self.ui.configbool(b'devel', b'check-locks')
):
if self._currentlock(self._lockref) is not None:
self.ui.develwarn(b'"wlock" acquired after "lock"')
def unlock():
if self.dirstate.pendingparentchange():
self.dirstate.invalidate()
else:
self.dirstate.write(None)
self._filecache[b'dirstate'].refresh()
l = self._lock(
self.vfs,
b"wlock",
wait,
unlock,
self.invalidatedirstate,
_(b'working directory of %s') % self.origroot,
inheritchecker=self._wlockchecktransaction,
parentenvvar=b'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 checkcommitpatterns(self, wctx, 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 == b'.' or f in matched or f in wctx.substate:
continue
if f in status.deleted:
fail(f, _(b'file not found!'))
# Is it a directory that exists or used to exist?
if self.wvfs.isdir(f) or wctx.p1().hasdir(f):
d = f + b'/'
for mf in matched:
if mf.startswith(d):
break
else:
fail(f, _(b"no match under directory!"))
elif f not in self.dirstate:
fail(f, _(b"file not tracked!"))
@unfilteredmethod
def commit(
self,
text=b"",
user=None,
date=None,
match=None,
force=False,
editor=None,
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(b'%s: %s' % (f, msg))
if not match:
match = matchmod.always()
if not force:
match.bad = fail
# lock() for recent changelog (see issue4368)
with self.wlock(), self.lock():
wctx = self[None]
merge = len(wctx.parents()) > 1
if not force and merge and not match.always():
raise error.Abort(
_(
b'cannot partially commit a merge '
b'(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, match, status, fail)
cctx = context.workingcommitctx(
self, status, text, user, date, extra
)
ms = mergestatemod.mergestate.read(self)
mergeutil.checkunresolved(ms)
# internal config: ui.allowemptycommit
if cctx.isempty() and not self.ui.configbool(
b'ui', b'allowemptycommit'
):
self.ui.debug(b'nothing to commit, clearing merge state\n')
ms.reset()
return None
if merge and cctx.deleted():
raise error.Abort(_(b"cannot commit merge with missing files"))
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:
uipathfn = scmutil.getuipathfn(self)
for s in sorted(commitsubs):
sub = wctx.sub(s)
self.ui.status(
_(b'committing subrepository %s\n')
% uipathfn(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 b'')
try:
self.hook(
b"precommit", throw=True, parent1=hookp1, parent2=hookp2
)
with self.transaction(b'commit'):
ret = self.commitctx(cctx, True)
# update bookmarks, dirstate and mergestate
bookmarks.update(self, [p1, p2], ret)
cctx.markcommitted(ret)
ms.reset()
except: # re-raises
if edited:
self.ui.write(
_(b'note: commit message saved in %s\n') % msgfn
)
self.ui.write(
_(
b"note: use 'hg commit --logfile "
b".hg/last-message.txt --edit' to reuse it\n"
)
)
raise
def commithook(unused_success):
# hack for command that use a temporary commit (eg: histedit)
# temporary commit got stripped before hook release
if self.changelog.hasnode(ret):
self.hook(
b"commit", node=hex(ret), parent1=hookp1, parent2=hookp2
)
self._afterlock(commithook)
return ret
@unfilteredmethod
def commitctx(self, ctx, error=False, origctx=None):
return commit.commitctx(self, ctx, error=error, origctx=origctx)
@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=b'.',
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 not branches.hasbranch(branch):
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['namespace'] = namespace
hookargs['key'] = key
hookargs['old'] = old
hookargs['new'] = new
self.hook(b'prepushkey', throw=True, **hookargs)
except error.HookAbort as exc:
self.ui.write_err(_(b"pushkey-abort: %s\n") % exc)
if exc.hint:
self.ui.write_err(_(b"(%s)\n") % exc.hint)
return False
self.ui.debug(b'pushing key for "%s:%s"\n' % (namespace, key))
ret = pushkey.push(self, namespace, key, old, new)
def runhook(unused_success):
self.hook(
b'pushkey',
namespace=namespace,
key=key,
old=old,
new=new,
ret=ret,
)
self._afterlock(runhook)
return ret
def listkeys(self, namespace):
self.hook(b'prelistkeys', throw=True, namespace=namespace)
self.ui.debug(b'listing keys for "%s"\n' % namespace)
values = pushkey.list(self, namespace)
self.hook(b'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 b"%s %s %s %s %s" % (
one,
two,
pycompat.bytestr(three),
pycompat.bytestr(four),
pycompat.bytestr(five),
)
def savecommitmessage(self, text):
fp = self.vfs(b'last-message.txt', b'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(b'journal')
return os.path.join(base, name.replace(b'journal', b'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 defaultcreateopts(ui, createopts=None):
"""Populate the default creation options for a repository.
A dictionary of explicitly requested creation options can be passed
in. Missing keys will be populated.
"""
createopts = dict(createopts or {})
if b'backend' not in createopts:
# experimental config: storage.new-repo-backend
createopts[b'backend'] = ui.config(b'storage', b'new-repo-backend')
return createopts
def newreporequirements(ui, createopts):
"""Determine the set of requirements for a new local repository.
Extensions can wrap this function to specify custom requirements for
new repositories.
"""
# If the repo is being created from a shared repository, we copy
# its requirements.
if b'sharedrepo' in createopts:
requirements = set(createopts[b'sharedrepo'].requirements)
if createopts.get(b'sharedrelative'):
requirements.add(b'relshared')
else:
requirements.add(b'shared')
return requirements
if b'backend' not in createopts:
raise error.ProgrammingError(
b'backend key not present in createopts; '
b'was defaultcreateopts() called?'
)
if createopts[b'backend'] != b'revlogv1':
raise error.Abort(
_(
b'unable to determine repository requirements for '
b'storage backend: %s'
)
% createopts[b'backend']
)
requirements = {b'revlogv1'}
if ui.configbool(b'format', b'usestore'):
requirements.add(b'store')
if ui.configbool(b'format', b'usefncache'):
requirements.add(b'fncache')
if ui.configbool(b'format', b'dotencode'):
requirements.add(b'dotencode')
compengines = ui.configlist(b'format', b'revlog-compression')
for compengine in compengines:
if compengine in util.compengines:
break
else:
raise error.Abort(
_(
b'compression engines %s defined by '
b'format.revlog-compression not available'
)
% b', '.join(b'"%s"' % e for e in compengines),
hint=_(
b'run "hg debuginstall" to list available '
b'compression engines'
),
)
# zlib is the historical default and doesn't need an explicit requirement.
if compengine == b'zstd':
requirements.add(b'revlog-compression-zstd')
elif compengine != b'zlib':
requirements.add(b'exp-compression-%s' % compengine)
if scmutil.gdinitconfig(ui):
requirements.add(b'generaldelta')
if ui.configbool(b'format', b'sparse-revlog'):
requirements.add(SPARSEREVLOG_REQUIREMENT)
# experimental config: format.exp-use-side-data
if ui.configbool(b'format', b'exp-use-side-data'):
requirements.add(SIDEDATA_REQUIREMENT)
# experimental config: format.exp-use-copies-side-data-changeset
if ui.configbool(b'format', b'exp-use-copies-side-data-changeset'):
requirements.add(SIDEDATA_REQUIREMENT)
requirements.add(COPIESSDC_REQUIREMENT)
if ui.configbool(b'experimental', b'treemanifest'):
requirements.add(requirementsmod.TREEMANIFEST_REQUIREMENT)
revlogv2 = ui.config(b'experimental', b'revlogv2')
if revlogv2 == b'enable-unstable-format-and-corrupt-my-data':
requirements.remove(b'revlogv1')
# generaldelta is implied by revlogv2.
requirements.discard(b'generaldelta')
requirements.add(REVLOGV2_REQUIREMENT)
# experimental config: format.internal-phase
if ui.configbool(b'format', b'internal-phase'):
requirements.add(requirementsmod.INTERNAL_PHASE_REQUIREMENT)
if createopts.get(b'narrowfiles'):
requirements.add(requirementsmod.NARROW_REQUIREMENT)
if createopts.get(b'lfs'):
requirements.add(b'lfs')
if ui.configbool(b'format', b'bookmarks-in-store'):
requirements.add(bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT)
if ui.configbool(b'format', b'use-persistent-nodemap'):
requirements.add(NODEMAP_REQUIREMENT)
return requirements
def checkrequirementscompat(ui, requirements):
""" Checks compatibility of repository requirements enabled and disabled.
Returns a set of requirements which needs to be dropped because dependend
requirements are not enabled. Also warns users about it """
dropped = set()
if b'store' not in requirements:
if bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT in requirements:
ui.warn(
_(
b'ignoring enabled \'format.bookmarks-in-store\' config '
b'beacuse it is incompatible with disabled '
b'\'format.usestore\' config\n'
)
)
dropped.add(bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT)
if b'shared' in requirements or b'relshared' in requirements:
raise error.Abort(
_(
b"cannot create shared repository as source was created"
b" with 'format.usestore' config disabled"
)
)
return dropped
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 = {
b'backend',
b'lfs',
b'narrowfiles',
b'sharedrepo',
b'sharedrelative',
b'shareditems',
b'shallowfilestore',
}
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.
The following keys for ``createopts`` are recognized:
backend
The storage backend to use.
lfs
Repository will be created with ``lfs`` requirement. The lfs extension
will automatically be loaded when the repository is accessed.
narrowfiles
Set up repository to support narrow file storage.
sharedrepo
Repository object from which storage should be shared.
sharedrelative
Boolean indicating if the path to the shared repo should be
stored as relative. By default, the pointer to the "parent" repo
is stored as an absolute path.
shareditems
Set of items to share to the new repository (in addition to storage).
shallowfilestore
Indicates that storage for files should be shallow (not all ancestor
revisions are known).
"""
createopts = defaultcreateopts(ui, createopts=createopts)
unknownopts = filterknowncreateopts(ui, createopts)
if not isinstance(unknownopts, dict):
raise error.ProgrammingError(
b'filterknowncreateopts() did not return a dict'
)
if unknownopts:
raise error.Abort(
_(
b'unable to create repository because of unknown '
b'creation option: %s'
)
% b', '.join(sorted(unknownopts)),
hint=_(b'is a required extension not loaded?'),
)
requirements = newreporequirements(ui, createopts=createopts)
requirements -= checkrequirementscompat(ui, requirements)
wdirvfs = vfsmod.vfs(path, expandpath=True, realpath=True)
hgvfs = vfsmod.vfs(wdirvfs.join(b'.hg'))
if hgvfs.exists():
raise error.RepoError(_(b'repository %s already exists') % path)
if b'sharedrepo' in createopts:
sharedpath = createopts[b'sharedrepo'].sharedpath
if createopts.get(b'sharedrelative'):
try:
sharedpath = os.path.relpath(sharedpath, hgvfs.base)
except (IOError, ValueError) as e:
# ValueError is raised on Windows if the drive letters differ
# on each path.
raise error.Abort(
_(b'cannot calculate relative path'),
hint=stringutil.forcebytestr(e),
)
if not wdirvfs.exists():
wdirvfs.makedirs()
hgvfs.makedir(notindexed=True)
if b'sharedrepo' not in createopts:
hgvfs.mkdir(b'cache')
hgvfs.mkdir(b'wcache')
if b'store' in requirements and b'sharedrepo' not in createopts:
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)
# Write out file telling readers where to find the shared store.
if b'sharedrepo' in createopts:
hgvfs.write(b'sharedpath', sharedpath)
if createopts.get(b'shareditems'):
shared = b'\n'.join(sorted(createopts[b'shareditems'])) + b'\n'
hgvfs.write(b'shared', shared)
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 == 'close':
return object.__getattribute__(self, item)
raise error.ProgrammingError(
b'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, '__class__', poisonedrepository)