#!/usr/bin/env bash
#
# $Id$
# Author: Markus Wenzel, TU Muenchen
#
# Moscow ML 2.00 startup script
export -n INFILE OUTFILE COPYDB COMPRESS MLTEXT TERMINATE NOWRITE
## diagnostics
function fail_out()
{
echo "Unable to create output heap file: \"$OUTFILE\"" >&2
exit 2
}
## prepare databases
MOSML="mosml -P sml90"
if [ -z "$INFILE" ]; then
EXIT='load "OS"; fun exit 0 = (OS.Process.exit OS.Process.success): unit | exit _ = OS.Process.exit OS.Process.failure;'
else
EXIT=""
echo "Cannot load images yet!" >&2
exit 2
fi
if [ -z "$OUTFILE" ]; then
COMMIT='fun commit () = (TextIO.output (TextIO.stdErr, "Error - Database is not opened for writing.\n"); false);'
else
COMMIT="fun commit () = true;"
echo "WARNING: cannot save images yet!" >&2
[ -f "$OUTFILE" ] && { chmod +w "$OUTFILE" || fail_out; }
fi
## run it!
MLTEXT="$EXIT $COMMIT $MLTEXT"
MLEXIT="commit();"
if [ -z "$TERMINATE" ]; then
FEEDER_OPTS=""
else
FEEDER_OPTS="-q"
fi
"$ISABELLE_HOME/lib/scripts/feeder" -p -h "$MLTEXT" -t "$MLEXIT" $FEEDER_OPTS | \
{ read FPID; "$ML_HOME"/$MOSML $ML_OPTIONS 2>&1; RC="$?"; kill -HUP "$FPID"; exit "$RC"; }
RC="$?"
[ -n "$OUTFILE" -a -f "$OUTFILE" -a -n "$NOWRITE" ] && chmod -w "$OUTFILE"
exit "$RC"