{}", ex ) + # NOTE: We get here if Java is unable to run the VASSAL shim e.g. because it's too much older + # than the version used to compile the shim. We normally show the user detailed error output + # from VASSAL in a dialog, but getting the VASSAL version number is a bit different, since it's + # an unsolicited action done as we start up, so showing the error to the user is problematic, + # since we don't have a way to trigger the dialog. We could add a new field to MsgStore for + # detailed messages that should be shown in a dialog, but what if e.g. there's more than one? + # It gets messy real fast, so we just extract the important part of the error output and + # show it to the user in a normal error balloon. + msg = str( ex ) + if isinstance( ex, VassalShimError ): + mo = re.search( r'Exception in thread "main" (.+?)$', ex.stderr or ex.stdout, re.MULTILINE ) + if mo: + msg = mo.group( 1 ) + msg_store.error( "Can't get the VASSAL version: