+
−#!/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 sys
+
−import hghave
+
−
+
−checks = hghave.checks
+
−
+
−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)
+
−            sys.exit(2)
+
−
+
−        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)