#!/bin/sh
# convert-pl2-to-pl3,v 2.3 1994/05/17 00:31:24 dmoore Exp

if [ $# -ne 1 -o ! -f "$1" ]; then
    echo "usage: convert-pl2-to-pl3 <database>"
    exit 1
fi


if [ "`head -1 $1`" != '***Firiss TinyMUCK 2.3 DUMP Format***' ]; then
    echo "This does not appear to be a TinyMUCK 2.3 pl2 database."
    echo "If it doesn't load, try the convert program."
    exit 1
fi

echo Backing up database in $1.bak.

mv $1 $1.bak
if [ $? -ne 0 ]; then
    echo Unable to back up database.  Quitting.
    exit 1
fi


# First remap the header string.
# Then remap the locks by swapping them with the blank line
# which denotes end of properties and sticking the 'Key:i&:'
# which is needed in front.

sed \
    -e '1,1s/^\(...Firiss TinyMUCK 2.3 DUMP Format\)\(...\)$/\1 v1\2/' \
    -e '/^$/N' \
    -e 's/^\(\n\)\(.*\)$/Key:i\&:\2\1/' \
    < $1.bak > $1


cat <<'EOF'
Your database has been converted to the new format.  You should
run the new sanity checker on it, and see if the output seems
right.  The number of properties in your database will increase
by the number of locks that you had.
EOF