tests/hghave

tests: tolerate differences between Linux and Windows error strings

These are related to differences in how missing files and network connection
failures are displayed.  I opted to combine the strings in one line instead of
using '#if windows' blocks around entire commands in order to avoid future
changes being accidentally missed in the Windows sections.  Globbing away the
entire output seemed wrong, as it could mask other failures.

The raw messages involved are:

      Linux                               Windows

  "* not known"               <-> "getaddrinfo failed"
  "Connection refused"        <-> "No connection could be made because the
                                   target machine actively refused it"
  "No such file or directory" <-> "The system cannot find the file specified"

Issue 4941 indicates that NetBSD has yet another string for "* not known".

Also, the histedit test shows that the missing file is printed first on Windows,
last on Linux.  That is controlled in windows.py:posixfile if we care to change
it.

#!/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, sys
import hghave

checks = hghave.checks

def list_features():
    for name, feature in sorted(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")

def _loadaddon():
    if 'TESTDIR' in os.environ:
        # loading from '.' isn't needed, because `hghave` should be
        # running at TESTTMP in this case
        path = os.environ['TESTDIR']
    else:
        path = '.'

    if not os.path.exists(os.path.join(path, 'hghaveaddon.py')):
        return

    sys.path.insert(0, path)
    try:
        import hghaveaddon
    except BaseException, inst:
        sys.stderr.write('failed to import hghaveaddon.py from %r: %s\n'
                         % (path, inst))
        sys.exit(2)
    sys.path.pop(0)

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

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

    hghave.require(args)