tests/hghave

tags: line.rstrip().split() can be replaced with line.split()

The line looks like "123 <node> <node>" and does not start with
whitespace: it was therefore not significant that rstrip was used
instead of strip. Furthermore, the first part is fed to int, which
will itself strip away whitespace before converting the string to an
integer.

#!/usr/bin/env python
"""Test the running system for features availability. Exit with zero
if all features are there, non-zero otherwise. If a feature name is
prefixed with "no-", the absence of feature is tested.
"""
import optparse
import os, stat
import re
import sys
import tempfile

tempprefix = 'hg-hghave-'

def matchoutput(cmd, regexp, ignorestatus=False):
    """Return True if cmd executes successfully and its output
    is matched by the supplied regular expression.
    """
    r = re.compile(regexp)
    fh = os.popen(cmd)
    s = fh.read()
    try:
        ret = fh.close()
    except IOError:
        # Happen in Windows test environment
        ret = 1
    return (ignorestatus or ret is None) and r.search(s)

def has_baz():
    return matchoutput('baz --version 2>&1', r'baz Bazaar version')

def has_bzr():
    try:
        import bzrlib
        return bzrlib.__doc__ != None
    except ImportError:
        return False

def has_bzr114():
    try:
        import bzrlib
        return (bzrlib.__doc__ != None
                and bzrlib.version_info[:2] >= (1, 14))
    except ImportError:
        return False

def has_cvs():
    re = r'Concurrent Versions System.*?server'
    return matchoutput('cvs --version 2>&1', re) and not has_msys()

def has_darcs():
    return matchoutput('darcs --version', r'2\.[2-9]', True)

def has_mtn():
    return matchoutput('mtn --version', r'monotone', True) and not matchoutput(
        'mtn --version', r'monotone 0\.', True)

def has_eol_in_paths():
    try:
        fd, path = tempfile.mkstemp(prefix=tempprefix, suffix='\n\r')
        os.close(fd)
        os.remove(path)
        return True
    except:
        return False

def has_executablebit():
    try:
        EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
        fh, fn = tempfile.mkstemp(dir=".", prefix='hg-checkexec-')
        try:
            os.close(fh)
            m = os.stat(fn).st_mode & 0777
            new_file_has_exec = m & EXECFLAGS
            os.chmod(fn, m ^ EXECFLAGS)
            exec_flags_cannot_flip = ((os.stat(fn).st_mode & 0777) == 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)

def has_icasefs():
    # Stolen from mercurial.util
    fd, path = tempfile.mkstemp(prefix=tempprefix, dir='.')
    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:
            return False
    finally:
        os.remove(path)

def has_inotify():
    try:
        import hgext.inotify.linux.watcher
        return True
    except ImportError:
        return False

def has_fifo():
    return hasattr(os, "mkfifo")

def has_cacheable_fs():
    from mercurial import util

    fd, path = tempfile.mkstemp(prefix=tempprefix)
    os.close(fd)
    try:
        return util.cachestat(path).cacheable()
    finally:
        os.remove(path)

def has_lsprof():
    try:
        import _lsprof
        return True
    except ImportError:
        return False

def has_gettext():
    return matchoutput('msgfmt --version', 'GNU gettext-tools')

def has_git():
    return matchoutput('git --version 2>&1', r'^git version')

def has_docutils():
    try:
        from docutils.core import publish_cmdline
        return True
    except ImportError:
        return False

def getsvnversion():
    m = matchoutput('svn --version 2>&1', r'^svn,\s+version\s+(\d+)\.(\d+)')
    if not m:
        return (0, 0)
    return (int(m.group(1)), int(m.group(2)))

def has_svn15():
    return getsvnversion() >= (1, 5)

def has_svn13():
    return getsvnversion() >= (1, 3)

def has_svn():
    return matchoutput('svn --version 2>&1', r'^svn, version') and \
        matchoutput('svnadmin --version 2>&1', r'^svnadmin, version')

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

def has_p4():
    return matchoutput('p4 -V', r'Rev\. P4/') and matchoutput('p4d -V', r'Rev\. P4D/')

def has_symlink():
    if not hasattr(os, "symlink"):
        return False
    name = tempfile.mktemp(dir=".", prefix='hg-checklink-')
    try:
        os.symlink(".", name)
        os.unlink(name)
        return True
    except (OSError, AttributeError):
        return False

def has_tla():
    return matchoutput('tla --version 2>&1', r'The GNU Arch Revision')

def has_gpg():
    return matchoutput('gpg --version 2>&1', r'GnuPG')

def has_unix_permissions():
    d = tempfile.mkdtemp(prefix=tempprefix, dir=".")
    try:
        fname = os.path.join(d, 'foo')
        for umask in (077, 007, 022):
            os.umask(umask)
            f = open(fname, 'w')
            f.close()
            mode = os.stat(fname).st_mode
            os.unlink(fname)
            if mode & 0777 != ~umask & 0666:
                return False
        return True
    finally:
        os.rmdir(d)

def has_pyflakes():
    return matchoutput('echo "import re" 2>&1 | pyflakes',
                       r"<stdin>:1: 're' imported but unused",
                       True)

def has_pygments():
    try:
        import pygments
        return True
    except ImportError:
        return False

def has_outer_repo():
    return matchoutput('hg root 2>&1', r'')

def has_ssl():
    try:
        import ssl
        import OpenSSL
        OpenSSL.SSL.Context
        return True
    except ImportError:
        return False

def has_windows():
    return os.name == 'nt'

def has_system_sh():
    return os.name != 'nt'

def has_serve():
    return os.name != 'nt' # gross approximation

def has_tic():
    return matchoutput('test -x "`which tic`"', '')

def has_msys():
    return os.getenv('MSYSTEM')

checks = {
    "baz": (has_baz, "GNU Arch baz client"),
    "bzr": (has_bzr, "Canonical's Bazaar client"),
    "bzr114": (has_bzr114, "Canonical's Bazaar client >= 1.14"),
    "cacheable": (has_cacheable_fs, "cacheable filesystem"),
    "cvs": (has_cvs, "cvs client/server"),
    "darcs": (has_darcs, "darcs client"),
    "docutils": (has_docutils, "Docutils text processing library"),
    "eol-in-paths": (has_eol_in_paths, "end-of-lines in paths"),
    "execbit": (has_executablebit, "executable bit"),
    "fifo": (has_fifo, "named pipes"),
    "gettext": (has_gettext, "GNU Gettext (msgfmt)"),
    "git": (has_git, "git command line client"),
    "gpg": (has_gpg, "gpg client"),
    "icasefs": (has_icasefs, "case insensitive file system"),
    "inotify": (has_inotify, "inotify extension support"),
    "lsprof": (has_lsprof, "python lsprof module"),
    "mtn": (has_mtn, "monotone client (>= 1.0)"),
    "outer-repo": (has_outer_repo, "outer repo"),
    "p4": (has_p4, "Perforce server and client"),
    "pyflakes": (has_pyflakes, "Pyflakes python linter"),
    "pygments": (has_pygments, "Pygments source highlighting library"),
    "serve": (has_serve, "platform and python can manage 'hg serve -d'"),
    "ssl": (has_ssl, "python >= 2.6 ssl module and python OpenSSL"),
    "svn": (has_svn, "subversion client and admin tools"),
    "svn13": (has_svn13, "subversion client and admin tools >= 1.3"),
    "svn15": (has_svn15, "subversion client and admin tools >= 1.5"),
    "svn-bindings": (has_svn_bindings, "subversion python bindings"),
    "symlink": (has_symlink, "symbolic links"),
    "system-sh": (has_system_sh, "system() uses sh"),
    "tic": (has_tic, "terminfo compiler"),
    "tla": (has_tla, "GNU Arch tla client"),
    "unix-permissions": (has_unix_permissions, "unix-style permissions"),
    "windows": (has_windows, "Windows"),
    "msys": (has_msys, "Windows with MSYS"),
}

def list_features():
    for name, feature in checks.iteritems():
        desc = feature[1]
        print name + ':', desc

def test_features():
    failed = 0
    for name, feature in checks.iteritems():
        check, _ = feature
        try:
            check()
        except Exception, e:
            print "feature %s failed:  %s" % (name, e)
            failed += 1
    return failed

parser = optparse.OptionParser("%prog [options] [features]")
parser.add_option("--test-features", action="store_true",
                  help="test available features")
parser.add_option("--list-features", action="store_true",
                  help="list available features")
parser.add_option("-q", "--quiet", action="store_true",
                  help="check features silently")

if __name__ == '__main__':
    options, args = parser.parse_args()
    if options.list_features:
        list_features()
        sys.exit(0)

    if options.test_features:
        sys.exit(test_features())

    quiet = options.quiet

    failures = 0

    def error(msg):
        global failures
        if not quiet:
            sys.stderr.write(msg + '\n')
        failures += 1

    for feature in args:
        negate = feature.startswith('no-')
        if negate:
            feature = feature[3:]

        if feature not in checks:
            error('skipped: unknown feature: ' + feature)
            continue

        check, desc = checks[feature]
        try:
            available = check()
        except Exception, e:
            error('hghave check failed: ' + feature)
            continue

        if not negate and not available:
            error('skipped: missing feature: ' + desc)
        elif negate and available:
            error('skipped: system supports %s' % desc)

    if failures != 0:
        sys.exit(1)