nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
from __future__ import absolute_import, print_function
import distutils.version
import os
import re
import socket
import stat
import subprocess
import sys
import tempfile
tempprefix = 'hg-hghave-'
checks = {
"true": (lambda: True, "yak shaving"),
"false": (lambda: False, "nail clipper"),
}
try:
import msvcrt
msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)
except ImportError:
pass
stdout = getattr(sys.stdout, 'buffer', sys.stdout)
stderr = getattr(sys.stderr, 'buffer', sys.stderr)
if sys.version_info[0] >= 3:
def _bytespath(p):
if p is None:
return p
return p.encode('utf-8')
def _strpath(p):
if p is None:
return p
return p.decode('utf-8')
else:
def _bytespath(p):
return p
_strpath = _bytespath
def check(name, desc):
"""Registers a check function for a feature."""
def decorator(func):
checks[name] = (func, desc)
return func
return decorator
def checkvers(name, desc, vers):
"""Registers a check function for each of a series of versions.
vers can be a list or an iterator.
Produces a series of feature checks that have the form <name><vers> without
any punctuation (even if there's punctuation in 'vers'; i.e. this produces
'py38', not 'py3.8' or 'py-38')."""
def decorator(func):
def funcv(v):
def f():
return func(v)
return f
for v in vers:
v = str(v)
f = funcv(v)
checks['%s%s' % (name, v.replace('.', ''))] = (f, desc % v)
return func
return decorator
def checkfeatures(features):
result = {
'error': [],
'missing': [],
'skipped': [],
}
for feature in features:
negate = feature.startswith('no-')
if negate:
feature = feature[3:]
if feature not in checks:
result['missing'].append(feature)
continue
check, desc = checks[feature]
try:
available = check()
except Exception:
result['error'].append('hghave check failed: %s' % feature)
continue
if not negate and not available:
result['skipped'].append('missing feature: %s' % desc)
elif negate and available:
result['skipped'].append('system supports %s' % desc)
return result
def require(features):
"""Require that features are available, exiting if not."""
result = checkfeatures(features)
for missing in result['missing']:
stderr.write(
('skipped: unknown feature: %s\n' % missing).encode('utf-8')
)
for msg in result['skipped']:
stderr.write(('skipped: %s\n' % msg).encode('utf-8'))
for msg in result['error']:
stderr.write(('%s\n' % msg).encode('utf-8'))
if result['missing']:
sys.exit(2)
if result['skipped'] or result['error']:
sys.exit(1)
def matchoutput(cmd, regexp, ignorestatus=False):
"""Return the match object if cmd executes successfully and its output
is matched by the supplied regular expression.
"""
r = re.compile(regexp)
p = subprocess.Popen(
cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT
)
s = p.communicate()[0]
ret = p.returncode
return (ignorestatus or not ret) and r.search(s)
@check("baz", "GNU Arch baz client")
def has_baz():
return matchoutput('baz --version 2>&1', br'baz Bazaar version')
@check("bzr", "Canonical's Bazaar client")
def has_bzr():
try:
import bzrlib
import bzrlib.bzrdir
import bzrlib.errors
import bzrlib.revision
import bzrlib.revisionspec
bzrlib.revisionspec.RevisionSpec
return bzrlib.__doc__ is not None
except (AttributeError, ImportError):
return False
@checkvers("bzr", "Canonical's Bazaar client >= %s", (1.14,))
def has_bzr_range(v):
major, minor = v.split('rc')[0].split('.')[0:2]
try:
import bzrlib
return bzrlib.__doc__ is not None and bzrlib.version_info[:2] >= (
int(major),
int(minor),
)
except ImportError:
return False
@check("chg", "running with chg")
def has_chg():
return 'CHGHG' in os.environ
@check("cvs", "cvs client/server")
def has_cvs():
re = br'Concurrent Versions System.*?server'
return matchoutput('cvs --version 2>&1', re) and not has_msys()
@check("cvs112", "cvs client/server 1.12.* (not cvsnt)")
def has_cvs112():
re = br'Concurrent Versions System \(CVS\) 1.12.*?server'
return matchoutput('cvs --version 2>&1', re) and not has_msys()
@check("cvsnt", "cvsnt client/server")
def has_cvsnt():
re = br'Concurrent Versions System \(CVSNT\) (\d+).(\d+).*\(client/server\)'
return matchoutput('cvsnt --version 2>&1', re)
@check("darcs", "darcs client")
def has_darcs():
return matchoutput('darcs --version', br'\b2\.([2-9]|\d{2})', True)
@check("mtn", "monotone client (>= 1.0)")
def has_mtn():
return matchoutput('mtn --version', br'monotone', True) and not matchoutput(
'mtn --version', br'monotone 0\.', True
)
@check("eol-in-paths", "end-of-lines in paths")
def has_eol_in_paths():
try:
fd, path = tempfile.mkstemp(dir='.', prefix=tempprefix, suffix='\n\r')
os.close(fd)
os.remove(path)
return True
except (IOError, OSError):
return False
@check("execbit", "executable bit")
def has_executablebit():
try:
EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
fh, fn = tempfile.mkstemp(dir='.', prefix=tempprefix)
try:
os.close(fh)
m = os.stat(fn).st_mode & 0o777
new_file_has_exec = m & EXECFLAGS
os.chmod(fn, m ^ EXECFLAGS)
exec_flags_cannot_flip = (os.stat(fn).st_mode & 0o777) == m
finally:
os.unlink(fn)
except (IOError, OSError):
# we don't care, the user probably won't be able to commit anyway
return False
return not (new_file_has_exec or exec_flags_cannot_flip)
@check("icasefs", "case insensitive file system")
def has_icasefs():
# Stolen from mercurial.util
fd, path = tempfile.mkstemp(dir='.', prefix=tempprefix)
os.close(fd)
try:
s1 = os.stat(path)
d, b = os.path.split(path)
p2 = os.path.join(d, b.upper())
if path == p2:
p2 = os.path.join(d, b.lower())
try:
s2 = os.stat(p2)
return s2 == s1
except OSError:
return False
finally:
os.remove(path)
@check("fifo", "named pipes")
def has_fifo():
if getattr(os, "mkfifo", None) is None:
return False
name = tempfile.mktemp(dir='.', prefix=tempprefix)
try:
os.mkfifo(name)
os.unlink(name)
return True
except OSError:
return False
@check("killdaemons", 'killdaemons.py support')
def has_killdaemons():
return True
@check("cacheable", "cacheable filesystem")
def has_cacheable_fs():
from mercurial import util
fd, path = tempfile.mkstemp(dir='.', prefix=tempprefix)
os.close(fd)
try:
return util.cachestat(path).cacheable()
finally:
os.remove(path)
@check("lsprof", "python lsprof module")
def has_lsprof():
try:
import _lsprof
_lsprof.Profiler # silence unused import warning
return True
except ImportError:
return False
def _gethgversion():
m = matchoutput('hg --version --quiet 2>&1', br'(\d+)\.(\d+)')
if not m:
return (0, 0)
return (int(m.group(1)), int(m.group(2)))
_hgversion = None
def gethgversion():
global _hgversion
if _hgversion is None:
_hgversion = _gethgversion()
return _hgversion
@checkvers(
"hg", "Mercurial >= %s", list([(1.0 * x) / 10 for x in range(9, 99)])
)
def has_hg_range(v):
major, minor = v.split('.')[0:2]
return gethgversion() >= (int(major), int(minor))
@check("hg08", "Mercurial >= 0.8")
def has_hg08():
if checks["hg09"][0]():
return True
return matchoutput('hg help annotate 2>&1', '--date')
@check("hg07", "Mercurial >= 0.7")
def has_hg07():
if checks["hg08"][0]():
return True
return matchoutput('hg --version --quiet 2>&1', 'Mercurial Distributed SCM')
@check("hg06", "Mercurial >= 0.6")
def has_hg06():
if checks["hg07"][0]():
return True
return matchoutput('hg --version --quiet 2>&1', 'Mercurial version')
@check("gettext", "GNU Gettext (msgfmt)")
def has_gettext():
return matchoutput('msgfmt --version', br'GNU gettext-tools')
@check("git", "git command line client")
def has_git():
return matchoutput('git --version 2>&1', br'^git version')
def getgitversion():
m = matchoutput('git --version 2>&1', br'git version (\d+)\.(\d+)')
if not m:
return (0, 0)
return (int(m.group(1)), int(m.group(2)))
# https://github.com/git-lfs/lfs-test-server
@check("lfs-test-server", "git-lfs test server")
def has_lfsserver():
exe = 'lfs-test-server'
if has_windows():
exe = 'lfs-test-server.exe'
return any(
os.access(os.path.join(path, exe), os.X_OK)
for path in os.environ["PATH"].split(os.pathsep)
)
@checkvers("git", "git client (with ext::sh support) version >= %s", (1.9,))
def has_git_range(v):
major, minor = v.split('.')[0:2]
return getgitversion() >= (int(major), int(minor))
@check("docutils", "Docutils text processing library")
def has_docutils():
try:
import docutils.core
docutils.core.publish_cmdline # silence unused import
return True
except ImportError:
return False
def getsvnversion():
m = matchoutput('svn --version --quiet 2>&1', br'^(\d+)\.(\d+)')
if not m:
return (0, 0)
return (int(m.group(1)), int(m.group(2)))
@checkvers("svn", "subversion client and admin tools >= %s", (1.3, 1.5))
def has_svn_range(v):
major, minor = v.split('.')[0:2]
return getsvnversion() >= (int(major), int(minor))
@check("svn", "subversion client and admin tools")
def has_svn():
return matchoutput('svn --version 2>&1', br'^svn, version') and matchoutput(
'svnadmin --version 2>&1', br'^svnadmin, version'
)
@check("svn-bindings", "subversion python bindings")
def has_svn_bindings():
try:
import svn.core
version = svn.core.SVN_VER_MAJOR, svn.core.SVN_VER_MINOR
if version < (1, 4):
return False
return True
except ImportError:
return False
@check("p4", "Perforce server and client")
def has_p4():
return matchoutput('p4 -V', br'Rev\. P4/') and matchoutput(
'p4d -V', br'Rev\. P4D/'
)
@check("symlink", "symbolic links")
def has_symlink():
# mercurial.windows.checklink() is a hard 'no' at the moment
if os.name == 'nt' or getattr(os, "symlink", None) is None:
return False
name = tempfile.mktemp(dir='.', prefix=tempprefix)
try:
os.symlink(".", name)
os.unlink(name)
return True
except (OSError, AttributeError):
return False
@check("hardlink", "hardlinks")
def has_hardlink():
from mercurial import util
fh, fn = tempfile.mkstemp(dir='.', prefix=tempprefix)
os.close(fh)
name = tempfile.mktemp(dir='.', prefix=tempprefix)
try:
util.oslink(_bytespath(fn), _bytespath(name))
os.unlink(name)
return True
except OSError:
return False
finally:
os.unlink(fn)
@check("hardlink-whitelisted", "hardlinks on whitelisted filesystems")
def has_hardlink_whitelisted():
from mercurial import util
try:
fstype = util.getfstype(b'.')
except OSError:
return False
return fstype in util._hardlinkfswhitelist
@check("rmcwd", "can remove current working directory")
def has_rmcwd():
ocwd = os.getcwd()
temp = tempfile.mkdtemp(dir='.', prefix=tempprefix)
try:
os.chdir(temp)
# On Linux, 'rmdir .' isn't allowed, but the other names are okay.
# On Solaris and Windows, the cwd can't be removed by any names.
os.rmdir(os.getcwd())
return True
except OSError:
return False
finally:
os.chdir(ocwd)
# clean up temp dir on platforms where cwd can't be removed
try:
os.rmdir(temp)
except OSError:
pass
@check("tla", "GNU Arch tla client")
def has_tla():
return matchoutput('tla --version 2>&1', br'The GNU Arch Revision')
@check("gpg", "gpg client")
def has_gpg():
return matchoutput('gpg --version 2>&1', br'GnuPG')
@check("gpg2", "gpg client v2")
def has_gpg2():
return matchoutput('gpg --version 2>&1', br'GnuPG[^0-9]+2\.')
@check("gpg21", "gpg client v2.1+")
def has_gpg21():
return matchoutput('gpg --version 2>&1', br'GnuPG[^0-9]+2\.(?!0)')
@check("unix-permissions", "unix-style permissions")
def has_unix_permissions():
d = tempfile.mkdtemp(dir='.', prefix=tempprefix)
try:
fname = os.path.join(d, 'foo')
for umask in (0o77, 0o07, 0o22):
os.umask(umask)
f = open(fname, 'w')
f.close()
mode = os.stat(fname).st_mode
os.unlink(fname)
if mode & 0o777 != ~umask & 0o666:
return False
return True
finally:
os.rmdir(d)
@check("unix-socket", "AF_UNIX socket family")
def has_unix_socket():
return getattr(socket, 'AF_UNIX', None) is not None
@check("root", "root permissions")
def has_root():
return getattr(os, 'geteuid', None) and os.geteuid() == 0
@check("pyflakes", "Pyflakes python linter")
def has_pyflakes():
return matchoutput(
"sh -c \"echo 'import re' 2>&1 | pyflakes\"",
br"<stdin>:1: 're' imported but unused",
True,
)
@check("pylint", "Pylint python linter")
def has_pylint():
return matchoutput("pylint --help", br"Usage: pylint", True)
@check("clang-format", "clang-format C code formatter")
def has_clang_format():
m = matchoutput('clang-format --version', br'clang-format version (\d)')
# style changed somewhere between 4.x and 6.x
return m and int(m.group(1)) >= 6
@check("jshint", "JSHint static code analysis tool")
def has_jshint():
return matchoutput("jshint --version 2>&1", br"jshint v")
@check("pygments", "Pygments source highlighting library")
def has_pygments():
try:
import pygments
pygments.highlight # silence unused import warning
return True
except ImportError:
return False
@check("pygments25", "Pygments version >= 2.5")
def pygments25():
try:
import pygments
v = pygments.__version__
except ImportError:
return False
parts = v.split(".")
major = int(parts[0])
minor = int(parts[1])
return (major, minor) >= (2, 5)
@check("outer-repo", "outer repo")
def has_outer_repo():
# failing for other reasons than 'no repo' imply that there is a repo
return not matchoutput('hg root 2>&1', br'abort: no repository found', True)
@check("ssl", "ssl module available")
def has_ssl():
try:
import ssl
ssl.CERT_NONE
return True
except ImportError:
return False
@check("sslcontext", "python >= 2.7.9 ssl")
def has_sslcontext():
try:
import ssl
ssl.SSLContext
return True
except (ImportError, AttributeError):
return False
@check("defaultcacerts", "can verify SSL certs by system's CA certs store")
def has_defaultcacerts():
from mercurial import sslutil, ui as uimod
ui = uimod.ui.load()
return sslutil._defaultcacerts(ui) or sslutil._canloaddefaultcerts
@check("defaultcacertsloaded", "detected presence of loaded system CA certs")
def has_defaultcacertsloaded():
import ssl
from mercurial import sslutil, ui as uimod
if not has_defaultcacerts():
return False
if not has_sslcontext():
return False
ui = uimod.ui.load()
cafile = sslutil._defaultcacerts(ui)
ctx = ssl.create_default_context()
if cafile:
ctx.load_verify_locations(cafile=cafile)
else:
ctx.load_default_certs()
return len(ctx.get_ca_certs()) > 0
@check("tls1.2", "TLS 1.2 protocol support")
def has_tls1_2():
from mercurial import sslutil
return b'tls1.2' in sslutil.supportedprotocols
@check("windows", "Windows")
def has_windows():
return os.name == 'nt'
@check("system-sh", "system() uses sh")
def has_system_sh():
return os.name != 'nt'
@check("serve", "platform and python can manage 'hg serve -d'")
def has_serve():
return True
@check("test-repo", "running tests from repository")
def has_test_repo():
t = os.environ["TESTDIR"]
return os.path.isdir(os.path.join(t, "..", ".hg"))
@check("tic", "terminfo compiler and curses module")
def has_tic():
try:
import curses
curses.COLOR_BLUE
return matchoutput('test -x "`which tic`"', br'')
except (ImportError, AttributeError):
return False
@check("xz", "xz compression utility")
def has_xz():
# When Windows invokes a subprocess in shell mode, it uses `cmd.exe`, which
# only knows `where`, not `which`. So invoke MSYS shell explicitly.
return matchoutput("sh -c 'test -x \"`which xz`\"'", b'')
@check("msys", "Windows with MSYS")
def has_msys():
return os.getenv('MSYSTEM')
@check("aix", "AIX")
def has_aix():
return sys.platform.startswith("aix")
@check("osx", "OS X")
def has_osx():
return sys.platform == 'darwin'
@check("osxpackaging", "OS X packaging tools")
def has_osxpackaging():
try:
return (
matchoutput('pkgbuild', br'Usage: pkgbuild ', ignorestatus=1)
and matchoutput(
'productbuild', br'Usage: productbuild ', ignorestatus=1
)
and matchoutput('lsbom', br'Usage: lsbom', ignorestatus=1)
and matchoutput('xar --help', br'Usage: xar', ignorestatus=1)
)
except ImportError:
return False
@check('linuxormacos', 'Linux or MacOS')
def has_linuxormacos():
# This isn't a perfect test for MacOS. But it is sufficient for our needs.
return sys.platform.startswith(('linux', 'darwin'))
@check("docker", "docker support")
def has_docker():
pat = br'A self-sufficient runtime for'
if matchoutput('docker --help', pat):
if 'linux' not in sys.platform:
# TODO: in theory we should be able to test docker-based
# package creation on non-linux using boot2docker, but in
# practice that requires extra coordination to make sure
# $TESTTEMP is going to be visible at the same path to the
# boot2docker VM. If we figure out how to verify that, we
# can use the following instead of just saying False:
# return 'DOCKER_HOST' in os.environ
return False
return True
return False
@check("debhelper", "debian packaging tools")
def has_debhelper():
# Some versions of dpkg say `dpkg', some say 'dpkg' (` vs ' on the first
# quote), so just accept anything in that spot.
dpkg = matchoutput(
'dpkg --version', br"Debian .dpkg' package management program"
)
dh = matchoutput(
'dh --help', br'dh is a part of debhelper.', ignorestatus=True
)
dh_py2 = matchoutput(
'dh_python2 --help', br'other supported Python versions'
)
# debuild comes from the 'devscripts' package, though you might want
# the 'build-debs' package instead, which has a dependency on devscripts.
debuild = matchoutput(
'debuild --help', br'to run debian/rules with given parameter'
)
return dpkg and dh and dh_py2 and debuild
@check(
"debdeps", "debian build dependencies (run dpkg-checkbuilddeps in contrib/)"
)
def has_debdeps():
# just check exit status (ignoring output)
path = '%s/../contrib/packaging/debian/control' % os.environ['TESTDIR']
return matchoutput('dpkg-checkbuilddeps %s' % path, br'')
@check("demandimport", "demandimport enabled")
def has_demandimport():
# chg disables demandimport intentionally for performance wins.
return (not has_chg()) and os.environ.get('HGDEMANDIMPORT') != 'disable'
# Add "py27", "py35", ... as possible feature checks. Note that there's no
# punctuation here.
@checkvers("py", "Python >= %s", (2.7, 3.5, 3.6, 3.7, 3.8, 3.9))
def has_python_range(v):
major, minor = v.split('.')[0:2]
py_major, py_minor = sys.version_info.major, sys.version_info.minor
return (py_major, py_minor) >= (int(major), int(minor))
@check("py3", "running with Python 3.x")
def has_py3():
return 3 == sys.version_info[0]
@check("py3exe", "a Python 3.x interpreter is available")
def has_python3exe():
return matchoutput('python3 -V', br'^Python 3.(5|6|7|8|9)')
@check("pure", "running with pure Python code")
def has_pure():
return any(
[
os.environ.get("HGMODULEPOLICY") == "py",
os.environ.get("HGTEST_RUN_TESTS_PURE") == "--pure",
]
)
@check("slow", "allow slow tests (use --allow-slow-tests)")
def has_slow():
return os.environ.get('HGTEST_SLOW') == 'slow'
@check("hypothesis", "Hypothesis automated test generation")
def has_hypothesis():
try:
import hypothesis
hypothesis.given
return True
except ImportError:
return False
@check("unziplinks", "unzip(1) understands and extracts symlinks")
def unzip_understands_symlinks():
return matchoutput('unzip --help', br'Info-ZIP')
@check("zstd", "zstd Python module available")
def has_zstd():
try:
import mercurial.zstd
mercurial.zstd.__version__
return True
except ImportError:
return False
@check("devfull", "/dev/full special file")
def has_dev_full():
return os.path.exists('/dev/full')
@check("ensurepip", "ensurepip module")
def has_ensurepip():
try:
import ensurepip
ensurepip.bootstrap
return True
except ImportError:
return False
@check("virtualenv", "Python virtualenv support")
def has_virtualenv():
try:
import virtualenv
virtualenv.ACTIVATE_SH
return True
except ImportError:
return False
@check("fsmonitor", "running tests with fsmonitor")
def has_fsmonitor():
return 'HGFSMONITOR_TESTS' in os.environ
@check("fuzzywuzzy", "Fuzzy string matching library")
def has_fuzzywuzzy():
try:
import fuzzywuzzy
fuzzywuzzy.__version__
return True
except ImportError:
return False
@check("clang-libfuzzer", "clang new enough to include libfuzzer")
def has_clang_libfuzzer():
mat = matchoutput('clang --version', br'clang version (\d)')
if mat:
# libfuzzer is new in clang 6
return int(mat.group(1)) > 5
return False
@check("clang-6.0", "clang 6.0 with version suffix (libfuzzer included)")
def has_clang60():
return matchoutput('clang-6.0 --version', br'clang version 6\.')
@check("xdiff", "xdiff algorithm")
def has_xdiff():
try:
from mercurial import policy
bdiff = policy.importmod('bdiff')
return bdiff.xdiffblocks(b'', b'') == [(0, 0, 0, 0)]
except (ImportError, AttributeError):
return False
@check('extraextensions', 'whether tests are running with extra extensions')
def has_extraextensions():
return 'HGTESTEXTRAEXTENSIONS' in os.environ
def getrepofeatures():
"""Obtain set of repository features in use.
HGREPOFEATURES can be used to define or remove features. It contains
a space-delimited list of feature strings. Strings beginning with ``-``
mean to remove.
"""
# Default list provided by core.
features = {
'bundlerepo',
'revlogstore',
'fncache',
}
# Features that imply other features.
implies = {
'simplestore': ['-revlogstore', '-bundlerepo', '-fncache'],
}
for override in os.environ.get('HGREPOFEATURES', '').split(' '):
if not override:
continue
if override.startswith('-'):
if override[1:] in features:
features.remove(override[1:])
else:
features.add(override)
for imply in implies.get(override, []):
if imply.startswith('-'):
if imply[1:] in features:
features.remove(imply[1:])
else:
features.add(imply)
return features
@check('reporevlogstore', 'repository using the default revlog store')
def has_reporevlogstore():
return 'revlogstore' in getrepofeatures()
@check('reposimplestore', 'repository using simple storage extension')
def has_reposimplestore():
return 'simplestore' in getrepofeatures()
@check('repobundlerepo', 'whether we can open bundle files as repos')
def has_repobundlerepo():
return 'bundlerepo' in getrepofeatures()
@check('repofncache', 'repository has an fncache')
def has_repofncache():
return 'fncache' in getrepofeatures()
@check('sqlite', 'sqlite3 module is available')
def has_sqlite():
try:
import sqlite3
version = sqlite3.sqlite_version_info
except ImportError:
return False
if version < (3, 8, 3):
# WITH clause not supported
return False
return matchoutput('sqlite3 -version', br'^3\.\d+')
@check('vcr', 'vcr http mocking library')
def has_vcr():
try:
import vcr
vcr.VCR
return True
except (ImportError, AttributeError):
pass
return False
@check('emacs', 'GNU Emacs')
def has_emacs():
# Our emacs lisp uses `with-eval-after-load` which is new in emacs
# 24.4, so we allow emacs 24.4, 24.5, and 25+ (24.5 was the last
# 24 release)
return matchoutput('emacs --version', b'GNU Emacs 2(4.4|4.5|5|6|7|8|9)')
@check('black', 'the black formatter for python')
def has_black():
blackcmd = 'black --version'
version_regex = b'black, version ([0-9a-b.]+)'
version = matchoutput(blackcmd, version_regex)
sv = distutils.version.StrictVersion
return version and sv(_strpath(version.group(1))) >= sv('19.10b0')
@check('pytype', 'the pytype type checker')
def has_pytype():
pytypecmd = 'pytype --version'
version = matchoutput(pytypecmd, b'[0-9a-b.]+')
sv = distutils.version.StrictVersion
return version and sv(_strpath(version.group(0))) >= sv('2019.10.17')
@check("rustfmt", "rustfmt tool")
def has_rustfmt():
# We use Nightly's rustfmt due to current unstable config options.
return matchoutput(
'`rustup which --toolchain nightly rustfmt` --version', b'rustfmt'
)