hgwebdir: avoid systematic full garbage collection
Forcing a systematic full garbage collection upon each request
can serioulsy harm performance. This is reported as
https://bz.mercurial-scm.org/show_bug.cgi?id=6075
With this change we're performing the full collection according
to a new setting, `experimental.web.full-garbage-collection-rate`.
The default value is 1, which doesn't change the behavior and will
allow us to test on real use cases. If the value is 0, no full garbage
collection occurs.
Regardless of the value of the setting, a partial garbage collection
still occurs upon each request (not attempting to collect objects from
the oldest generation). This should be enough to take care of
reference cycles that have been created by the last request
(assessment of this requires changing the setting, not to be 1).
In my experience chasing memory leaks in Mercurial servers,
the full collection never reclaimed any memory, but this is with
Python 3 and biased towards small repositories.
On the other hand, as explained in the Python developer docs [1],
frequent full collections are very harmful in terms of performance if
lots of objects survive the collection, and hence stay in the
oldest generation. Note that `gc.collect()` is indeed trying to
collect the oldest generation [2]. This happens usually in two cases:
- unwanted lingering objects (i.e., an actual memory leak that
the GC cannot do anything about). Sadly, we have lots of those
these days.
- desireable long-term objects, typically in caches (not inner caches
carried by repositories, which should be collected with them). This
is a subject of interest for the Heptapod project.
In short, the flat rate that this change still permits is
probably a bad idea in most cases, and the default value can
be tweaked later on (or even be set to 0) according to experiments
in the wild.
The test is inspired from test-hgwebdir-paths.py
[1] https://devguide.python.org/garbage_collector/#collecting-the-oldest-generation
[2] https://docs.python.org/3/library/gc.html#gc.collect
Differential Revision: https://phab.mercurial-scm.org/D11204
# configitems.py - centralized declaration of configuration option
#
# Copyright 2017 Pierre-Yves David <pierre-yves.david@octobus.net>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import functools
import re
from . import (
encoding,
error,
)
def loadconfigtable(ui, extname, configtable):
"""update config item known to the ui with the extension ones"""
for section, items in sorted(configtable.items()):
knownitems = ui._knownconfig.setdefault(section, itemregister())
knownkeys = set(knownitems)
newkeys = set(items)
for key in sorted(knownkeys & newkeys):
msg = b"extension '%s' overwrite config item '%s.%s'"
msg %= (extname, section, key)
ui.develwarn(msg, config=b'warn-config')
knownitems.update(items)
class configitem(object):
"""represent a known config item
:section: the official config section where to find this item,
:name: the official name within the section,
:default: default value for this item,
:alias: optional list of tuples as alternatives,
:generic: this is a generic definition, match name using regular expression.
"""
def __init__(
self,
section,
name,
default=None,
alias=(),
generic=False,
priority=0,
experimental=False,
):
self.section = section
self.name = name
self.default = default
self.alias = list(alias)
self.generic = generic
self.priority = priority
self.experimental = experimental
self._re = None
if generic:
self._re = re.compile(self.name)
class itemregister(dict):
"""A specialized dictionary that can handle wild-card selection"""
def __init__(self):
super(itemregister, self).__init__()
self._generics = set()
def update(self, other):
super(itemregister, self).update(other)
self._generics.update(other._generics)
def __setitem__(self, key, item):
super(itemregister, self).__setitem__(key, item)
if item.generic:
self._generics.add(item)
def get(self, key):
baseitem = super(itemregister, self).get(key)
if baseitem is not None and not baseitem.generic:
return baseitem
# search for a matching generic item
generics = sorted(self._generics, key=(lambda x: (x.priority, x.name)))
for item in generics:
# we use 'match' instead of 'search' to make the matching simpler
# for people unfamiliar with regular expression. Having the match
# rooted to the start of the string will produce less surprising
# result for user writing simple regex for sub-attribute.
#
# For example using "color\..*" match produces an unsurprising
# result, while using search could suddenly match apparently
# unrelated configuration that happens to contains "color."
# anywhere. This is a tradeoff where we favor requiring ".*" on
# some match to avoid the need to prefix most pattern with "^".
# The "^" seems more error prone.
if item._re.match(key):
return item
return None
coreitems = {}
def _register(configtable, *args, **kwargs):
item = configitem(*args, **kwargs)
section = configtable.setdefault(item.section, itemregister())
if item.name in section:
msg = b"duplicated config item registration for '%s.%s'"
raise error.ProgrammingError(msg % (item.section, item.name))
section[item.name] = item
# special value for case where the default is derived from other values
dynamicdefault = object()
# Registering actual config items
def getitemregister(configtable):
f = functools.partial(_register, configtable)
# export pseudo enum as configitem.*
f.dynamicdefault = dynamicdefault
return f
coreconfigitem = getitemregister(coreitems)
def _registerdiffopts(section, configprefix=b''):
coreconfigitem(
section,
configprefix + b'nodates',
default=False,
)
coreconfigitem(
section,
configprefix + b'showfunc',
default=False,
)
coreconfigitem(
section,
configprefix + b'unified',
default=None,
)
coreconfigitem(
section,
configprefix + b'git',
default=False,
)
coreconfigitem(
section,
configprefix + b'ignorews',
default=False,
)
coreconfigitem(
section,
configprefix + b'ignorewsamount',
default=False,
)
coreconfigitem(
section,
configprefix + b'ignoreblanklines',
default=False,
)
coreconfigitem(
section,
configprefix + b'ignorewseol',
default=False,
)
coreconfigitem(
section,
configprefix + b'nobinary',
default=False,
)
coreconfigitem(
section,
configprefix + b'noprefix',
default=False,
)
coreconfigitem(
section,
configprefix + b'word-diff',
default=False,
)
coreconfigitem(
b'alias',
b'.*',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'auth',
b'cookiefile',
default=None,
)
_registerdiffopts(section=b'annotate')
# bookmarks.pushing: internal hack for discovery
coreconfigitem(
b'bookmarks',
b'pushing',
default=list,
)
# bundle.mainreporoot: internal hack for bundlerepo
coreconfigitem(
b'bundle',
b'mainreporoot',
default=b'',
)
coreconfigitem(
b'censor',
b'policy',
default=b'abort',
experimental=True,
)
coreconfigitem(
b'chgserver',
b'idletimeout',
default=3600,
)
coreconfigitem(
b'chgserver',
b'skiphash',
default=False,
)
coreconfigitem(
b'cmdserver',
b'log',
default=None,
)
coreconfigitem(
b'cmdserver',
b'max-log-files',
default=7,
)
coreconfigitem(
b'cmdserver',
b'max-log-size',
default=b'1 MB',
)
coreconfigitem(
b'cmdserver',
b'max-repo-cache',
default=0,
experimental=True,
)
coreconfigitem(
b'cmdserver',
b'message-encodings',
default=list,
)
coreconfigitem(
b'cmdserver',
b'track-log',
default=lambda: [b'chgserver', b'cmdserver', b'repocache'],
)
coreconfigitem(
b'cmdserver',
b'shutdown-on-interrupt',
default=True,
)
coreconfigitem(
b'color',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'color',
b'mode',
default=b'auto',
)
coreconfigitem(
b'color',
b'pagermode',
default=dynamicdefault,
)
coreconfigitem(
b'command-templates',
b'graphnode',
default=None,
alias=[(b'ui', b'graphnodetemplate')],
)
coreconfigitem(
b'command-templates',
b'log',
default=None,
alias=[(b'ui', b'logtemplate')],
)
coreconfigitem(
b'command-templates',
b'mergemarker',
default=(
b'{node|short} '
b'{ifeq(tags, "tip", "", '
b'ifeq(tags, "", "", "{tags} "))}'
b'{if(bookmarks, "{bookmarks} ")}'
b'{ifeq(branch, "default", "", "{branch} ")}'
b'- {author|user}: {desc|firstline}'
),
alias=[(b'ui', b'mergemarkertemplate')],
)
coreconfigitem(
b'command-templates',
b'pre-merge-tool-output',
default=None,
alias=[(b'ui', b'pre-merge-tool-output-template')],
)
coreconfigitem(
b'command-templates',
b'oneline-summary',
default=None,
)
coreconfigitem(
b'command-templates',
b'oneline-summary.*',
default=dynamicdefault,
generic=True,
)
_registerdiffopts(section=b'commands', configprefix=b'commit.interactive.')
coreconfigitem(
b'commands',
b'commit.post-status',
default=False,
)
coreconfigitem(
b'commands',
b'grep.all-files',
default=False,
experimental=True,
)
coreconfigitem(
b'commands',
b'merge.require-rev',
default=False,
)
coreconfigitem(
b'commands',
b'push.require-revs',
default=False,
)
coreconfigitem(
b'commands',
b'resolve.confirm',
default=False,
)
coreconfigitem(
b'commands',
b'resolve.explicit-re-merge',
default=False,
)
coreconfigitem(
b'commands',
b'resolve.mark-check',
default=b'none',
)
_registerdiffopts(section=b'commands', configprefix=b'revert.interactive.')
coreconfigitem(
b'commands',
b'show.aliasprefix',
default=list,
)
coreconfigitem(
b'commands',
b'status.relative',
default=False,
)
coreconfigitem(
b'commands',
b'status.skipstates',
default=[],
experimental=True,
)
coreconfigitem(
b'commands',
b'status.terse',
default=b'',
)
coreconfigitem(
b'commands',
b'status.verbose',
default=False,
)
coreconfigitem(
b'commands',
b'update.check',
default=None,
)
coreconfigitem(
b'commands',
b'update.requiredest',
default=False,
)
coreconfigitem(
b'committemplate',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'convert',
b'bzr.saverev',
default=True,
)
coreconfigitem(
b'convert',
b'cvsps.cache',
default=True,
)
coreconfigitem(
b'convert',
b'cvsps.fuzz',
default=60,
)
coreconfigitem(
b'convert',
b'cvsps.logencoding',
default=None,
)
coreconfigitem(
b'convert',
b'cvsps.mergefrom',
default=None,
)
coreconfigitem(
b'convert',
b'cvsps.mergeto',
default=None,
)
coreconfigitem(
b'convert',
b'git.committeractions',
default=lambda: [b'messagedifferent'],
)
coreconfigitem(
b'convert',
b'git.extrakeys',
default=list,
)
coreconfigitem(
b'convert',
b'git.findcopiesharder',
default=False,
)
coreconfigitem(
b'convert',
b'git.remoteprefix',
default=b'remote',
)
coreconfigitem(
b'convert',
b'git.renamelimit',
default=400,
)
coreconfigitem(
b'convert',
b'git.saverev',
default=True,
)
coreconfigitem(
b'convert',
b'git.similarity',
default=50,
)
coreconfigitem(
b'convert',
b'git.skipsubmodules',
default=False,
)
coreconfigitem(
b'convert',
b'hg.clonebranches',
default=False,
)
coreconfigitem(
b'convert',
b'hg.ignoreerrors',
default=False,
)
coreconfigitem(
b'convert',
b'hg.preserve-hash',
default=False,
)
coreconfigitem(
b'convert',
b'hg.revs',
default=None,
)
coreconfigitem(
b'convert',
b'hg.saverev',
default=False,
)
coreconfigitem(
b'convert',
b'hg.sourcename',
default=None,
)
coreconfigitem(
b'convert',
b'hg.startrev',
default=None,
)
coreconfigitem(
b'convert',
b'hg.tagsbranch',
default=b'default',
)
coreconfigitem(
b'convert',
b'hg.usebranchnames',
default=True,
)
coreconfigitem(
b'convert',
b'ignoreancestorcheck',
default=False,
experimental=True,
)
coreconfigitem(
b'convert',
b'localtimezone',
default=False,
)
coreconfigitem(
b'convert',
b'p4.encoding',
default=dynamicdefault,
)
coreconfigitem(
b'convert',
b'p4.startrev',
default=0,
)
coreconfigitem(
b'convert',
b'skiptags',
default=False,
)
coreconfigitem(
b'convert',
b'svn.debugsvnlog',
default=True,
)
coreconfigitem(
b'convert',
b'svn.trunk',
default=None,
)
coreconfigitem(
b'convert',
b'svn.tags',
default=None,
)
coreconfigitem(
b'convert',
b'svn.branches',
default=None,
)
coreconfigitem(
b'convert',
b'svn.startrev',
default=0,
)
coreconfigitem(
b'convert',
b'svn.dangerous-set-commit-dates',
default=False,
)
coreconfigitem(
b'debug',
b'dirstate.delaywrite',
default=0,
)
coreconfigitem(
b'debug',
b'revlog.verifyposition.changelog',
default=b'',
)
coreconfigitem(
b'defaults',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'devel',
b'all-warnings',
default=False,
)
coreconfigitem(
b'devel',
b'bundle2.debug',
default=False,
)
coreconfigitem(
b'devel',
b'bundle.delta',
default=b'',
)
coreconfigitem(
b'devel',
b'cache-vfs',
default=None,
)
coreconfigitem(
b'devel',
b'check-locks',
default=False,
)
coreconfigitem(
b'devel',
b'check-relroot',
default=False,
)
# Track copy information for all file, not just "added" one (very slow)
coreconfigitem(
b'devel',
b'copy-tracing.trace-all-files',
default=False,
)
coreconfigitem(
b'devel',
b'default-date',
default=None,
)
coreconfigitem(
b'devel',
b'deprec-warn',
default=False,
)
coreconfigitem(
b'devel',
b'disableloaddefaultcerts',
default=False,
)
coreconfigitem(
b'devel',
b'warn-empty-changegroup',
default=False,
)
coreconfigitem(
b'devel',
b'legacy.exchange',
default=list,
)
# When True, revlogs use a special reference version of the nodemap, that is not
# performant but is "known" to behave properly.
coreconfigitem(
b'devel',
b'persistent-nodemap',
default=False,
)
coreconfigitem(
b'devel',
b'servercafile',
default=b'',
)
coreconfigitem(
b'devel',
b'serverexactprotocol',
default=b'',
)
coreconfigitem(
b'devel',
b'serverrequirecert',
default=False,
)
coreconfigitem(
b'devel',
b'strip-obsmarkers',
default=True,
)
coreconfigitem(
b'devel',
b'warn-config',
default=None,
)
coreconfigitem(
b'devel',
b'warn-config-default',
default=None,
)
coreconfigitem(
b'devel',
b'user.obsmarker',
default=None,
)
coreconfigitem(
b'devel',
b'warn-config-unknown',
default=None,
)
coreconfigitem(
b'devel',
b'debug.copies',
default=False,
)
coreconfigitem(
b'devel',
b'copy-tracing.multi-thread',
default=True,
)
coreconfigitem(
b'devel',
b'debug.extensions',
default=False,
)
coreconfigitem(
b'devel',
b'debug.repo-filters',
default=False,
)
coreconfigitem(
b'devel',
b'debug.peer-request',
default=False,
)
# If discovery.exchange-heads is False, the discovery will not start with
# remote head fetching and local head querying.
coreconfigitem(
b'devel',
b'discovery.exchange-heads',
default=True,
)
# If discovery.grow-sample is False, the sample size used in set discovery will
# not be increased through the process
coreconfigitem(
b'devel',
b'discovery.grow-sample',
default=True,
)
# When discovery.grow-sample.dynamic is True, the default, the sample size is
# adapted to the shape of the undecided set (it is set to the max of:
# <target-size>, len(roots(undecided)), len(heads(undecided)
coreconfigitem(
b'devel',
b'discovery.grow-sample.dynamic',
default=True,
)
# discovery.grow-sample.rate control the rate at which the sample grow
coreconfigitem(
b'devel',
b'discovery.grow-sample.rate',
default=1.05,
)
# If discovery.randomize is False, random sampling during discovery are
# deterministic. It is meant for integration tests.
coreconfigitem(
b'devel',
b'discovery.randomize',
default=True,
)
# Control the initial size of the discovery sample
coreconfigitem(
b'devel',
b'discovery.sample-size',
default=200,
)
# Control the initial size of the discovery for initial change
coreconfigitem(
b'devel',
b'discovery.sample-size.initial',
default=100,
)
_registerdiffopts(section=b'diff')
coreconfigitem(
b'diff',
b'merge',
default=False,
experimental=True,
)
coreconfigitem(
b'email',
b'bcc',
default=None,
)
coreconfigitem(
b'email',
b'cc',
default=None,
)
coreconfigitem(
b'email',
b'charsets',
default=list,
)
coreconfigitem(
b'email',
b'from',
default=None,
)
coreconfigitem(
b'email',
b'method',
default=b'smtp',
)
coreconfigitem(
b'email',
b'reply-to',
default=None,
)
coreconfigitem(
b'email',
b'to',
default=None,
)
coreconfigitem(
b'experimental',
b'archivemetatemplate',
default=dynamicdefault,
)
coreconfigitem(
b'experimental',
b'auto-publish',
default=b'publish',
)
coreconfigitem(
b'experimental',
b'bundle-phases',
default=False,
)
coreconfigitem(
b'experimental',
b'bundle2-advertise',
default=True,
)
coreconfigitem(
b'experimental',
b'bundle2-output-capture',
default=False,
)
coreconfigitem(
b'experimental',
b'bundle2.pushback',
default=False,
)
coreconfigitem(
b'experimental',
b'bundle2lazylocking',
default=False,
)
coreconfigitem(
b'experimental',
b'bundlecomplevel',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecomplevel.bzip2',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecomplevel.gzip',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecomplevel.none',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecomplevel.zstd',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecompthreads',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecompthreads.bzip2',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecompthreads.gzip',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecompthreads.none',
default=None,
)
coreconfigitem(
b'experimental',
b'bundlecompthreads.zstd',
default=None,
)
coreconfigitem(
b'experimental',
b'changegroup3',
default=False,
)
coreconfigitem(
b'experimental',
b'changegroup4',
default=False,
)
coreconfigitem(
b'experimental',
b'cleanup-as-archived',
default=False,
)
coreconfigitem(
b'experimental',
b'clientcompressionengines',
default=list,
)
coreconfigitem(
b'experimental',
b'copytrace',
default=b'on',
)
coreconfigitem(
b'experimental',
b'copytrace.movecandidateslimit',
default=100,
)
coreconfigitem(
b'experimental',
b'copytrace.sourcecommitlimit',
default=100,
)
coreconfigitem(
b'experimental',
b'copies.read-from',
default=b"filelog-only",
)
coreconfigitem(
b'experimental',
b'copies.write-to',
default=b'filelog-only',
)
coreconfigitem(
b'experimental',
b'crecordtest',
default=None,
)
coreconfigitem(
b'experimental',
b'directaccess',
default=False,
)
coreconfigitem(
b'experimental',
b'directaccess.revnums',
default=False,
)
coreconfigitem(
b'experimental',
b'dirstate-tree.in-memory',
default=False,
)
coreconfigitem(
b'experimental',
b'editortmpinhg',
default=False,
)
coreconfigitem(
b'experimental',
b'evolution',
default=list,
)
coreconfigitem(
b'experimental',
b'evolution.allowdivergence',
default=False,
alias=[(b'experimental', b'allowdivergence')],
)
coreconfigitem(
b'experimental',
b'evolution.allowunstable',
default=None,
)
coreconfigitem(
b'experimental',
b'evolution.createmarkers',
default=None,
)
coreconfigitem(
b'experimental',
b'evolution.effect-flags',
default=True,
alias=[(b'experimental', b'effect-flags')],
)
coreconfigitem(
b'experimental',
b'evolution.exchange',
default=None,
)
coreconfigitem(
b'experimental',
b'evolution.bundle-obsmarker',
default=False,
)
coreconfigitem(
b'experimental',
b'evolution.bundle-obsmarker:mandatory',
default=True,
)
coreconfigitem(
b'experimental',
b'log.topo',
default=False,
)
coreconfigitem(
b'experimental',
b'evolution.report-instabilities',
default=True,
)
coreconfigitem(
b'experimental',
b'evolution.track-operation',
default=True,
)
# repo-level config to exclude a revset visibility
#
# The target use case is to use `share` to expose different subset of the same
# repository, especially server side. See also `server.view`.
coreconfigitem(
b'experimental',
b'extra-filter-revs',
default=None,
)
coreconfigitem(
b'experimental',
b'maxdeltachainspan',
default=-1,
)
# tracks files which were undeleted (merge might delete them but we explicitly
# kept/undeleted them) and creates new filenodes for them
coreconfigitem(
b'experimental',
b'merge-track-salvaged',
default=False,
)
coreconfigitem(
b'experimental',
b'mergetempdirprefix',
default=None,
)
coreconfigitem(
b'experimental',
b'mmapindexthreshold',
default=None,
)
coreconfigitem(
b'experimental',
b'narrow',
default=False,
)
coreconfigitem(
b'experimental',
b'nonnormalparanoidcheck',
default=False,
)
coreconfigitem(
b'experimental',
b'exportableenviron',
default=list,
)
coreconfigitem(
b'experimental',
b'extendedheader.index',
default=None,
)
coreconfigitem(
b'experimental',
b'extendedheader.similarity',
default=False,
)
coreconfigitem(
b'experimental',
b'graphshorten',
default=False,
)
coreconfigitem(
b'experimental',
b'graphstyle.parent',
default=dynamicdefault,
)
coreconfigitem(
b'experimental',
b'graphstyle.missing',
default=dynamicdefault,
)
coreconfigitem(
b'experimental',
b'graphstyle.grandparent',
default=dynamicdefault,
)
coreconfigitem(
b'experimental',
b'hook-track-tags',
default=False,
)
coreconfigitem(
b'experimental',
b'httppeer.advertise-v2',
default=False,
)
coreconfigitem(
b'experimental',
b'httppeer.v2-encoder-order',
default=None,
)
coreconfigitem(
b'experimental',
b'httppostargs',
default=False,
)
coreconfigitem(b'experimental', b'nointerrupt', default=False)
coreconfigitem(b'experimental', b'nointerrupt-interactiveonly', default=True)
coreconfigitem(
b'experimental',
b'obsmarkers-exchange-debug',
default=False,
)
coreconfigitem(
b'experimental',
b'remotenames',
default=False,
)
coreconfigitem(
b'experimental',
b'removeemptydirs',
default=True,
)
coreconfigitem(
b'experimental',
b'revert.interactive.select-to-keep',
default=False,
)
coreconfigitem(
b'experimental',
b'revisions.prefixhexnode',
default=False,
)
# "out of experimental" todo list.
#
# * include management of a persistent nodemap in the main docket
# * enforce a "no-truncate" policy for mmap safety
# - for censoring operation
# - for stripping operation
# - for rollback operation
# * proper streaming (race free) of the docket file
# * track garbage data to evemtually allow rewriting -existing- sidedata.
# * Exchange-wise, we will also need to do something more efficient than
# keeping references to the affected revlogs, especially memory-wise when
# rewriting sidedata.
# * introduce a proper solution to reduce the number of filelog related files.
# * use caching for reading sidedata (similar to what we do for data).
# * no longer set offset=0 if sidedata_size=0 (simplify cutoff computation).
# * Improvement to consider
# - avoid compression header in chunk using the default compression?
# - forbid "inline" compression mode entirely?
# - split the data offset and flag field (the 2 bytes save are mostly trouble)
# - keep track of uncompressed -chunk- size (to preallocate memory better)
# - keep track of chain base or size (probably not that useful anymore)
coreconfigitem(
b'experimental',
b'revlogv2',
default=None,
)
coreconfigitem(
b'experimental',
b'revisions.disambiguatewithin',
default=None,
)
coreconfigitem(
b'experimental',
b'rust.index',
default=False,
)
coreconfigitem(
b'experimental',
b'server.filesdata.recommended-batch-size',
default=50000,
)
coreconfigitem(
b'experimental',
b'server.manifestdata.recommended-batch-size',
default=100000,
)
coreconfigitem(
b'experimental',
b'server.stream-narrow-clones',
default=False,
)
coreconfigitem(
b'experimental',
b'single-head-per-branch',
default=False,
)
coreconfigitem(
b'experimental',
b'single-head-per-branch:account-closed-heads',
default=False,
)
coreconfigitem(
b'experimental',
b'single-head-per-branch:public-changes-only',
default=False,
)
coreconfigitem(
b'experimental',
b'sshserver.support-v2',
default=False,
)
coreconfigitem(
b'experimental',
b'sparse-read',
default=False,
)
coreconfigitem(
b'experimental',
b'sparse-read.density-threshold',
default=0.50,
)
coreconfigitem(
b'experimental',
b'sparse-read.min-gap-size',
default=b'65K',
)
coreconfigitem(
b'experimental',
b'treemanifest',
default=False,
)
coreconfigitem(
b'experimental',
b'update.atomic-file',
default=False,
)
coreconfigitem(
b'experimental',
b'sshpeer.advertise-v2',
default=False,
)
coreconfigitem(
b'experimental',
b'web.apiserver',
default=False,
)
coreconfigitem(
b'experimental',
b'web.api.http-v2',
default=False,
)
coreconfigitem(
b'experimental',
b'web.api.debugreflect',
default=False,
)
coreconfigitem(
b'experimental',
b'web.full-garbage-collection-rate',
default=1, # still forcing a full collection on each request
)
coreconfigitem(
b'experimental',
b'worker.wdir-get-thread-safe',
default=False,
)
coreconfigitem(
b'experimental',
b'worker.repository-upgrade',
default=False,
)
coreconfigitem(
b'experimental',
b'xdiff',
default=False,
)
coreconfigitem(
b'extensions',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'extdata',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'format',
b'bookmarks-in-store',
default=False,
)
coreconfigitem(
b'format',
b'chunkcachesize',
default=None,
experimental=True,
)
coreconfigitem(
# Enable this dirstate format *when creating a new repository*.
# Which format to use for existing repos is controlled by .hg/requires
b'format',
b'exp-dirstate-v2',
default=False,
experimental=True,
)
coreconfigitem(
b'format',
b'dotencode',
default=True,
)
coreconfigitem(
b'format',
b'generaldelta',
default=False,
experimental=True,
)
coreconfigitem(
b'format',
b'manifestcachesize',
default=None,
experimental=True,
)
coreconfigitem(
b'format',
b'maxchainlen',
default=dynamicdefault,
experimental=True,
)
coreconfigitem(
b'format',
b'obsstore-version',
default=None,
)
coreconfigitem(
b'format',
b'sparse-revlog',
default=True,
)
coreconfigitem(
b'format',
b'revlog-compression',
default=lambda: [b'zstd', b'zlib'],
alias=[(b'experimental', b'format.compression')],
)
# Experimental TODOs:
#
# * Same as for evlogv2 (but for the reduction of the number of files)
# * Improvement to investigate
# - storing .hgtags fnode
# - storing `rank` of changesets
# - storing branch related identifier
coreconfigitem(
b'format',
b'exp-use-changelog-v2',
default=None,
experimental=True,
)
coreconfigitem(
b'format',
b'usefncache',
default=True,
)
coreconfigitem(
b'format',
b'usegeneraldelta',
default=True,
)
coreconfigitem(
b'format',
b'usestore',
default=True,
)
def _persistent_nodemap_default():
"""compute `use-persistent-nodemap` default value
The feature is disabled unless a fast implementation is available.
"""
from . import policy
return policy.importrust('revlog') is not None
coreconfigitem(
b'format',
b'use-persistent-nodemap',
default=_persistent_nodemap_default,
)
coreconfigitem(
b'format',
b'exp-use-copies-side-data-changeset',
default=False,
experimental=True,
)
coreconfigitem(
b'format',
b'use-share-safe',
default=False,
)
coreconfigitem(
b'format',
b'internal-phase',
default=False,
experimental=True,
)
coreconfigitem(
b'fsmonitor',
b'warn_when_unused',
default=True,
)
coreconfigitem(
b'fsmonitor',
b'warn_update_file_count',
default=50000,
)
coreconfigitem(
b'fsmonitor',
b'warn_update_file_count_rust',
default=400000,
)
coreconfigitem(
b'help',
br'hidden-command\..*',
default=False,
generic=True,
)
coreconfigitem(
b'help',
br'hidden-topic\..*',
default=False,
generic=True,
)
coreconfigitem(
b'hooks',
b'[^:]*',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'hooks',
b'.*:run-with-plain',
default=True,
generic=True,
)
coreconfigitem(
b'hgweb-paths',
b'.*',
default=list,
generic=True,
)
coreconfigitem(
b'hostfingerprints',
b'.*',
default=list,
generic=True,
)
coreconfigitem(
b'hostsecurity',
b'ciphers',
default=None,
)
coreconfigitem(
b'hostsecurity',
b'minimumprotocol',
default=dynamicdefault,
)
coreconfigitem(
b'hostsecurity',
b'.*:minimumprotocol$',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'hostsecurity',
b'.*:ciphers$',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'hostsecurity',
b'.*:fingerprints$',
default=list,
generic=True,
)
coreconfigitem(
b'hostsecurity',
b'.*:verifycertsfile$',
default=None,
generic=True,
)
coreconfigitem(
b'http_proxy',
b'always',
default=False,
)
coreconfigitem(
b'http_proxy',
b'host',
default=None,
)
coreconfigitem(
b'http_proxy',
b'no',
default=list,
)
coreconfigitem(
b'http_proxy',
b'passwd',
default=None,
)
coreconfigitem(
b'http_proxy',
b'user',
default=None,
)
coreconfigitem(
b'http',
b'timeout',
default=None,
)
coreconfigitem(
b'logtoprocess',
b'commandexception',
default=None,
)
coreconfigitem(
b'logtoprocess',
b'commandfinish',
default=None,
)
coreconfigitem(
b'logtoprocess',
b'command',
default=None,
)
coreconfigitem(
b'logtoprocess',
b'develwarn',
default=None,
)
coreconfigitem(
b'logtoprocess',
b'uiblocked',
default=None,
)
coreconfigitem(
b'merge',
b'checkunknown',
default=b'abort',
)
coreconfigitem(
b'merge',
b'checkignored',
default=b'abort',
)
coreconfigitem(
b'experimental',
b'merge.checkpathconflicts',
default=False,
)
coreconfigitem(
b'merge',
b'followcopies',
default=True,
)
coreconfigitem(
b'merge',
b'on-failure',
default=b'continue',
)
coreconfigitem(
b'merge',
b'preferancestor',
default=lambda: [b'*'],
experimental=True,
)
coreconfigitem(
b'merge',
b'strict-capability-check',
default=False,
)
coreconfigitem(
b'merge-tools',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'merge-tools',
br'.*\.args$',
default=b"$local $base $other",
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.binary$',
default=False,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.check$',
default=list,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.checkchanged$',
default=False,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.executable$',
default=dynamicdefault,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.fixeol$',
default=False,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.gui$',
default=False,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.mergemarkers$',
default=b'basic',
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.mergemarkertemplate$',
default=dynamicdefault, # take from command-templates.mergemarker
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.priority$',
default=0,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.premerge$',
default=dynamicdefault,
generic=True,
priority=-1,
)
coreconfigitem(
b'merge-tools',
br'.*\.symlink$',
default=False,
generic=True,
priority=-1,
)
coreconfigitem(
b'pager',
b'attend-.*',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'pager',
b'ignore',
default=list,
)
coreconfigitem(
b'pager',
b'pager',
default=dynamicdefault,
)
coreconfigitem(
b'patch',
b'eol',
default=b'strict',
)
coreconfigitem(
b'patch',
b'fuzz',
default=2,
)
coreconfigitem(
b'paths',
b'default',
default=None,
)
coreconfigitem(
b'paths',
b'default-push',
default=None,
)
coreconfigitem(
b'paths',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'phases',
b'checksubrepos',
default=b'follow',
)
coreconfigitem(
b'phases',
b'new-commit',
default=b'draft',
)
coreconfigitem(
b'phases',
b'publish',
default=True,
)
coreconfigitem(
b'profiling',
b'enabled',
default=False,
)
coreconfigitem(
b'profiling',
b'format',
default=b'text',
)
coreconfigitem(
b'profiling',
b'freq',
default=1000,
)
coreconfigitem(
b'profiling',
b'limit',
default=30,
)
coreconfigitem(
b'profiling',
b'nested',
default=0,
)
coreconfigitem(
b'profiling',
b'output',
default=None,
)
coreconfigitem(
b'profiling',
b'showmax',
default=0.999,
)
coreconfigitem(
b'profiling',
b'showmin',
default=dynamicdefault,
)
coreconfigitem(
b'profiling',
b'showtime',
default=True,
)
coreconfigitem(
b'profiling',
b'sort',
default=b'inlinetime',
)
coreconfigitem(
b'profiling',
b'statformat',
default=b'hotpath',
)
coreconfigitem(
b'profiling',
b'time-track',
default=dynamicdefault,
)
coreconfigitem(
b'profiling',
b'type',
default=b'stat',
)
coreconfigitem(
b'progress',
b'assume-tty',
default=False,
)
coreconfigitem(
b'progress',
b'changedelay',
default=1,
)
coreconfigitem(
b'progress',
b'clear-complete',
default=True,
)
coreconfigitem(
b'progress',
b'debug',
default=False,
)
coreconfigitem(
b'progress',
b'delay',
default=3,
)
coreconfigitem(
b'progress',
b'disable',
default=False,
)
coreconfigitem(
b'progress',
b'estimateinterval',
default=60.0,
)
coreconfigitem(
b'progress',
b'format',
default=lambda: [b'topic', b'bar', b'number', b'estimate'],
)
coreconfigitem(
b'progress',
b'refresh',
default=0.1,
)
coreconfigitem(
b'progress',
b'width',
default=dynamicdefault,
)
coreconfigitem(
b'pull',
b'confirm',
default=False,
)
coreconfigitem(
b'push',
b'pushvars.server',
default=False,
)
coreconfigitem(
b'rewrite',
b'backup-bundle',
default=True,
alias=[(b'ui', b'history-editing-backup')],
)
coreconfigitem(
b'rewrite',
b'update-timestamp',
default=False,
)
coreconfigitem(
b'rewrite',
b'empty-successor',
default=b'skip',
experimental=True,
)
coreconfigitem(
b'storage',
b'new-repo-backend',
default=b'revlogv1',
experimental=True,
)
coreconfigitem(
b'storage',
b'revlog.optimize-delta-parent-choice',
default=True,
alias=[(b'format', b'aggressivemergedeltas')],
)
# experimental as long as rust is experimental (or a C version is implemented)
coreconfigitem(
b'storage',
b'revlog.persistent-nodemap.mmap',
default=True,
)
# experimental as long as format.use-persistent-nodemap is.
coreconfigitem(
b'storage',
b'revlog.persistent-nodemap.slow-path',
default=b"abort",
)
coreconfigitem(
b'storage',
b'revlog.reuse-external-delta',
default=True,
)
coreconfigitem(
b'storage',
b'revlog.reuse-external-delta-parent',
default=None,
)
coreconfigitem(
b'storage',
b'revlog.zlib.level',
default=None,
)
coreconfigitem(
b'storage',
b'revlog.zstd.level',
default=None,
)
coreconfigitem(
b'server',
b'bookmarks-pushkey-compat',
default=True,
)
coreconfigitem(
b'server',
b'bundle1',
default=True,
)
coreconfigitem(
b'server',
b'bundle1gd',
default=None,
)
coreconfigitem(
b'server',
b'bundle1.pull',
default=None,
)
coreconfigitem(
b'server',
b'bundle1gd.pull',
default=None,
)
coreconfigitem(
b'server',
b'bundle1.push',
default=None,
)
coreconfigitem(
b'server',
b'bundle1gd.push',
default=None,
)
coreconfigitem(
b'server',
b'bundle2.stream',
default=True,
alias=[(b'experimental', b'bundle2.stream')],
)
coreconfigitem(
b'server',
b'compressionengines',
default=list,
)
coreconfigitem(
b'server',
b'concurrent-push-mode',
default=b'check-related',
)
coreconfigitem(
b'server',
b'disablefullbundle',
default=False,
)
coreconfigitem(
b'server',
b'maxhttpheaderlen',
default=1024,
)
coreconfigitem(
b'server',
b'pullbundle',
default=False,
)
coreconfigitem(
b'server',
b'preferuncompressed',
default=False,
)
coreconfigitem(
b'server',
b'streamunbundle',
default=False,
)
coreconfigitem(
b'server',
b'uncompressed',
default=True,
)
coreconfigitem(
b'server',
b'uncompressedallowsecret',
default=False,
)
coreconfigitem(
b'server',
b'view',
default=b'served',
)
coreconfigitem(
b'server',
b'validate',
default=False,
)
coreconfigitem(
b'server',
b'zliblevel',
default=-1,
)
coreconfigitem(
b'server',
b'zstdlevel',
default=3,
)
coreconfigitem(
b'share',
b'pool',
default=None,
)
coreconfigitem(
b'share',
b'poolnaming',
default=b'identity',
)
coreconfigitem(
b'share',
b'safe-mismatch.source-not-safe',
default=b'abort',
)
coreconfigitem(
b'share',
b'safe-mismatch.source-safe',
default=b'abort',
)
coreconfigitem(
b'share',
b'safe-mismatch.source-not-safe.warn',
default=True,
)
coreconfigitem(
b'share',
b'safe-mismatch.source-safe.warn',
default=True,
)
coreconfigitem(
b'shelve',
b'maxbackups',
default=10,
)
coreconfigitem(
b'smtp',
b'host',
default=None,
)
coreconfigitem(
b'smtp',
b'local_hostname',
default=None,
)
coreconfigitem(
b'smtp',
b'password',
default=None,
)
coreconfigitem(
b'smtp',
b'port',
default=dynamicdefault,
)
coreconfigitem(
b'smtp',
b'tls',
default=b'none',
)
coreconfigitem(
b'smtp',
b'username',
default=None,
)
coreconfigitem(
b'sparse',
b'missingwarning',
default=True,
experimental=True,
)
coreconfigitem(
b'subrepos',
b'allowed',
default=dynamicdefault, # to make backporting simpler
)
coreconfigitem(
b'subrepos',
b'hg:allowed',
default=dynamicdefault,
)
coreconfigitem(
b'subrepos',
b'git:allowed',
default=dynamicdefault,
)
coreconfigitem(
b'subrepos',
b'svn:allowed',
default=dynamicdefault,
)
coreconfigitem(
b'templates',
b'.*',
default=None,
generic=True,
)
coreconfigitem(
b'templateconfig',
b'.*',
default=dynamicdefault,
generic=True,
)
coreconfigitem(
b'trusted',
b'groups',
default=list,
)
coreconfigitem(
b'trusted',
b'users',
default=list,
)
coreconfigitem(
b'ui',
b'_usedassubrepo',
default=False,
)
coreconfigitem(
b'ui',
b'allowemptycommit',
default=False,
)
coreconfigitem(
b'ui',
b'archivemeta',
default=True,
)
coreconfigitem(
b'ui',
b'askusername',
default=False,
)
coreconfigitem(
b'ui',
b'available-memory',
default=None,
)
coreconfigitem(
b'ui',
b'clonebundlefallback',
default=False,
)
coreconfigitem(
b'ui',
b'clonebundleprefers',
default=list,
)
coreconfigitem(
b'ui',
b'clonebundles',
default=True,
)
coreconfigitem(
b'ui',
b'color',
default=b'auto',
)
coreconfigitem(
b'ui',
b'commitsubrepos',
default=False,
)
coreconfigitem(
b'ui',
b'debug',
default=False,
)
coreconfigitem(
b'ui',
b'debugger',
default=None,
)
coreconfigitem(
b'ui',
b'editor',
default=dynamicdefault,
)
coreconfigitem(
b'ui',
b'detailed-exit-code',
default=False,
experimental=True,
)
coreconfigitem(
b'ui',
b'fallbackencoding',
default=None,
)
coreconfigitem(
b'ui',
b'forcecwd',
default=None,
)
coreconfigitem(
b'ui',
b'forcemerge',
default=None,
)
coreconfigitem(
b'ui',
b'formatdebug',
default=False,
)
coreconfigitem(
b'ui',
b'formatjson',
default=False,
)
coreconfigitem(
b'ui',
b'formatted',
default=None,
)
coreconfigitem(
b'ui',
b'interactive',
default=None,
)
coreconfigitem(
b'ui',
b'interface',
default=None,
)
coreconfigitem(
b'ui',
b'interface.chunkselector',
default=None,
)
coreconfigitem(
b'ui',
b'large-file-limit',
default=10000000,
)
coreconfigitem(
b'ui',
b'logblockedtimes',
default=False,
)
coreconfigitem(
b'ui',
b'merge',
default=None,
)
coreconfigitem(
b'ui',
b'mergemarkers',
default=b'basic',
)
coreconfigitem(
b'ui',
b'message-output',
default=b'stdio',
)
coreconfigitem(
b'ui',
b'nontty',
default=False,
)
coreconfigitem(
b'ui',
b'origbackuppath',
default=None,
)
coreconfigitem(
b'ui',
b'paginate',
default=True,
)
coreconfigitem(
b'ui',
b'patch',
default=None,
)
coreconfigitem(
b'ui',
b'portablefilenames',
default=b'warn',
)
coreconfigitem(
b'ui',
b'promptecho',
default=False,
)
coreconfigitem(
b'ui',
b'quiet',
default=False,
)
coreconfigitem(
b'ui',
b'quietbookmarkmove',
default=False,
)
coreconfigitem(
b'ui',
b'relative-paths',
default=b'legacy',
)
coreconfigitem(
b'ui',
b'remotecmd',
default=b'hg',
)
coreconfigitem(
b'ui',
b'report_untrusted',
default=True,
)
coreconfigitem(
b'ui',
b'rollback',
default=True,
)
coreconfigitem(
b'ui',
b'signal-safe-lock',
default=True,
)
coreconfigitem(
b'ui',
b'slash',
default=False,
)
coreconfigitem(
b'ui',
b'ssh',
default=b'ssh',
)
coreconfigitem(
b'ui',
b'ssherrorhint',
default=None,
)
coreconfigitem(
b'ui',
b'statuscopies',
default=False,
)
coreconfigitem(
b'ui',
b'strict',
default=False,
)
coreconfigitem(
b'ui',
b'style',
default=b'',
)
coreconfigitem(
b'ui',
b'supportcontact',
default=None,
)
coreconfigitem(
b'ui',
b'textwidth',
default=78,
)
coreconfigitem(
b'ui',
b'timeout',
default=b'600',
)
coreconfigitem(
b'ui',
b'timeout.warn',
default=0,
)
coreconfigitem(
b'ui',
b'timestamp-output',
default=False,
)
coreconfigitem(
b'ui',
b'traceback',
default=False,
)
coreconfigitem(
b'ui',
b'tweakdefaults',
default=False,
)
coreconfigitem(b'ui', b'username', alias=[(b'ui', b'user')])
coreconfigitem(
b'ui',
b'verbose',
default=False,
)
coreconfigitem(
b'verify',
b'skipflags',
default=None,
)
coreconfigitem(
b'web',
b'allowbz2',
default=False,
)
coreconfigitem(
b'web',
b'allowgz',
default=False,
)
coreconfigitem(
b'web',
b'allow-pull',
alias=[(b'web', b'allowpull')],
default=True,
)
coreconfigitem(
b'web',
b'allow-push',
alias=[(b'web', b'allow_push')],
default=list,
)
coreconfigitem(
b'web',
b'allowzip',
default=False,
)
coreconfigitem(
b'web',
b'archivesubrepos',
default=False,
)
coreconfigitem(
b'web',
b'cache',
default=True,
)
coreconfigitem(
b'web',
b'comparisoncontext',
default=5,
)
coreconfigitem(
b'web',
b'contact',
default=None,
)
coreconfigitem(
b'web',
b'deny_push',
default=list,
)
coreconfigitem(
b'web',
b'guessmime',
default=False,
)
coreconfigitem(
b'web',
b'hidden',
default=False,
)
coreconfigitem(
b'web',
b'labels',
default=list,
)
coreconfigitem(
b'web',
b'logoimg',
default=b'hglogo.png',
)
coreconfigitem(
b'web',
b'logourl',
default=b'https://mercurial-scm.org/',
)
coreconfigitem(
b'web',
b'accesslog',
default=b'-',
)
coreconfigitem(
b'web',
b'address',
default=b'',
)
coreconfigitem(
b'web',
b'allow-archive',
alias=[(b'web', b'allow_archive')],
default=list,
)
coreconfigitem(
b'web',
b'allow_read',
default=list,
)
coreconfigitem(
b'web',
b'baseurl',
default=None,
)
coreconfigitem(
b'web',
b'cacerts',
default=None,
)
coreconfigitem(
b'web',
b'certificate',
default=None,
)
coreconfigitem(
b'web',
b'collapse',
default=False,
)
coreconfigitem(
b'web',
b'csp',
default=None,
)
coreconfigitem(
b'web',
b'deny_read',
default=list,
)
coreconfigitem(
b'web',
b'descend',
default=True,
)
coreconfigitem(
b'web',
b'description',
default=b"",
)
coreconfigitem(
b'web',
b'encoding',
default=lambda: encoding.encoding,
)
coreconfigitem(
b'web',
b'errorlog',
default=b'-',
)
coreconfigitem(
b'web',
b'ipv6',
default=False,
)
coreconfigitem(
b'web',
b'maxchanges',
default=10,
)
coreconfigitem(
b'web',
b'maxfiles',
default=10,
)
coreconfigitem(
b'web',
b'maxshortchanges',
default=60,
)
coreconfigitem(
b'web',
b'motd',
default=b'',
)
coreconfigitem(
b'web',
b'name',
default=dynamicdefault,
)
coreconfigitem(
b'web',
b'port',
default=8000,
)
coreconfigitem(
b'web',
b'prefix',
default=b'',
)
coreconfigitem(
b'web',
b'push_ssl',
default=True,
)
coreconfigitem(
b'web',
b'refreshinterval',
default=20,
)
coreconfigitem(
b'web',
b'server-header',
default=None,
)
coreconfigitem(
b'web',
b'static',
default=None,
)
coreconfigitem(
b'web',
b'staticurl',
default=None,
)
coreconfigitem(
b'web',
b'stripes',
default=1,
)
coreconfigitem(
b'web',
b'style',
default=b'paper',
)
coreconfigitem(
b'web',
b'templates',
default=None,
)
coreconfigitem(
b'web',
b'view',
default=b'served',
experimental=True,
)
coreconfigitem(
b'worker',
b'backgroundclose',
default=dynamicdefault,
)
# Windows defaults to a limit of 512 open files. A buffer of 128
# should give us enough headway.
coreconfigitem(
b'worker',
b'backgroundclosemaxqueue',
default=384,
)
coreconfigitem(
b'worker',
b'backgroundcloseminfilecount',
default=2048,
)
coreconfigitem(
b'worker',
b'backgroundclosethreadcount',
default=4,
)
coreconfigitem(
b'worker',
b'enabled',
default=True,
)
coreconfigitem(
b'worker',
b'numcpus',
default=None,
)
# Rebase related configuration moved to core because other extension are doing
# strange things. For example, shelve import the extensions to reuse some bit
# without formally loading it.
coreconfigitem(
b'commands',
b'rebase.requiredest',
default=False,
)
coreconfigitem(
b'experimental',
b'rebaseskipobsolete',
default=True,
)
coreconfigitem(
b'rebase',
b'singletransaction',
default=False,
)
coreconfigitem(
b'rebase',
b'experimental.inmemory',
default=False,
)