tests: on windows, run command explicitly in sh for working command substitution
On windows, os.system runs the command in cmd.exe, which does not know command
substitution. To let this work, run the command explicitly in sh.
This fixes the failure of this test on windows.
$ "$TESTDIR/hghave" serve || exit 80
#if windows
$ hg clone http://localhost:$HGPORT/ copy
abort: * (glob)
[255]
#else
$ hg clone http://localhost:$HGPORT/ copy
abort: error: Connection refused
[255]
#endif
$ test -d copy
[1]
$ cat > dumb.py <<EOF
> import BaseHTTPServer, SimpleHTTPServer, os, signal
> def run(server_class=BaseHTTPServer.HTTPServer,
> handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
> server_address = ('localhost', int(os.environ['HGPORT']))
> httpd = server_class(server_address, handler_class)
> open("listening", "w")
> httpd.handle_request()
> run()
> EOF
$ python dumb.py 2> log &
$ P=$!
$ while [ ! -f listening ]; do sleep 0; done
$ hg clone http://localhost:$HGPORT/foo copy2
abort: HTTP Error 404: * (glob)
[255]
$ wait $P