from __future__ import absolute_import import errno 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"), } 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""" 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']: sys.stderr.write('skipped: unknown feature: %s\n' % missing) for msg in result['skipped']: sys.stderr.write('skipped: %s\n' % msg) for msg in result['error']: sys.stderr.write('%s\n' % msg) 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) try: p = subprocess.Popen( cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) except OSError as e: if e.errno != errno.ENOENT: raise ret = -1 ret = p.wait() s = p.stdout.read() 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('.')[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))) @checkvers("hg", "Mercurial >= %s", list([(1.0 * x) / 10 for x in range(9, 40)])) 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') @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(): if 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(fn, 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('.') 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":1: 're' imported but unused", True) @check("pylint", "Pylint python linter") def has_pylint(): return matchoutput("pylint --help", br"Usage: pylint", True) @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("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 '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 os.name != 'nt' # gross approximation @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: return False @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("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(): 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') return dpkg and dh and dh_py2 @check("demandimport", "demandimport enabled") def has_demandimport(): return os.environ.get('HGDEMANDIMPORT') != 'disable' @check("absimport", "absolute_import in __future__") def has_absimport(): import __future__ from mercurial import util return util.safehasattr(__future__, "absolute_import") @check("py27+", "running with Python 2.7+") def has_python27ornewer(): return sys.version_info[0:2] >= (2, 7) @check("py3k", "running with Python 3.x") def has_py3k(): return 3 == sys.version_info[0] @check("py3exe", "a Python 3.x interpreter is available") def has_python3exe(): return 'PYTHON3' in os.environ @check("py3pygments", "Pygments available on Python 3.x") def has_py3pygments(): if has_py3k(): return has_pygments() elif has_python3exe(): # just check exit status (ignoring output) py3 = os.environ['PYTHON3'] return matchoutput('%s -c "import pygments"' % py3, br'') return False @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") 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')