lib/scripts/run-smlnj

fixed commit emulation;

#!/bin/bash
#
# $Id$
#
# SML/NJ startup script (for 1.06 or later).
#
# Global vars: INFILE OUTFILE COPYDB MLTEXT OPTIONS TERMINATE,
# and from settings


## diagnostics

function fail()
{
  echo "$1"
  exit 2
}


## locations and settings

SML="$ML_HOME/bin/sml"


## prepare databases

function fail_out()
{
  fail "Unable to create output heap file: \"$OUTFILE\""
}

if [ -z "$OUTFILE" ]; then
  DB="$INFILE"
  COMMIT='fun commit() = (output (std_out, "Error - Database is not opened for writing.\n"); false);'
elif [ -n "$INFILE" -a "$INFILE" != "$OUTFILE" ]; then           # FIXME ! -ef !?
  [ -f "$OUTFILE" ] && { rm -f "$OUTFILE" || fail_out }
  cp "$INFILE" "$OUTFILE" || fail_out
  chmod +w "$OUTFILE"
  DB="$INFILE"
  COMMIT="fun commit() = not (exportML\"$OUTFILE\");"
else
  DB="$INFILE"
  COMMIT="fun commit() = not (exportML\"$OUTFILE\");"
fi

[ -n "$DB" ] && DB="@SMLload=$DB"
MLTEXT="$COMMIT $MLTEXT"


## run it!

START_SML="$SML $ML_OPTIONS $OPTIONS $DB"

if [ -n "$TERMINATE" ]; then
  echo "$MLTEXT" | $START_SML
  RC=$?
elif [ -z "$MLTEXT" ]; then
  $START_SML
  RC=$?
else
  TMP_FILE=/tmp/mltext-$$
  echo "$MLTEXT" >$TMP_FILE
  $ISABELLE_HOME/lib/scripts/ucat $TMP_FILE - | $START_SML
  RC=$?
  rm $TMP_FILE
fi

exit $RC