#!/bin/sh

## =================================================================
## Logtalk - Object oriented extension to Prolog
## Release 2.29.5
##
## Copyright (c) 1998-2007 Paulo Moura.  All Rights Reserved.
## =================================================================

echo
echo "Creating a script named qplgt for running Logtalk with Qu-Prolog..."
echo

if ! [ "$LOGTALKHOME" ]
then
	echo "The environment variable LOGTALKHOME must be defined first!"
	echo
	exit 1
fi

if ! [ -d "$LOGTALKHOME" ]; then
	echo "The environment variable LOGTALKHOME points to a non-existing directory!"
	echo "Its current value is: $LOGTALKHOME"
	echo "The variable must be set to your Logtalk installation directory!"
	echo
	exit 1
fi

if [ -z "$1" ]; then
	prefix=/usr/local
else
	prefix="$1"
fi

if ! [ -d "$prefix" ]; then
	echo "Directory prefix does not exist!"
	echo
	exit 1
fi

cd "$LOGTALKHOME"
mkdir -p bin
cd configs
cp qu.config qu.ql
echo "fcompile('qu.ql', [assemble_only(true)]), load(qu). \
chdir('../compiler/'), fcompile('logtalk.pl', [assemble_only(true), string_table(256)]), load(logtalk). \
chdir('../libpaths/'), fcompile('libpaths.pl', [assemble_only(true)]), load(libpaths)." | qp -s 3072 -d 1024 -h 2048
qc -c qphook.ql
cd ../bin
qc -s 3072 -d 1024 -h 2048 -o qplgt ../configs/qphook.qo ../configs/qu.qo ../compiler/logtalk.qo  ../libpaths/libpaths.qo
chmod a+x qplgt
ln -sf $LOGTALKHOME/bin/qplgt $prefix/bin/qplgt
rm ../configs/qu.ql
rm ../configs/qphook.qo
rm ../configs/qu.qo
rm ../compiler/logtalk.qo
rm ../libpaths/libpaths.qo
echo "Done. A link to the script was been created in $prefix/bin."
echo "The script must be regenerated whenever changes are made to"
echo "either the config file or the libpaths file."
echo
echo "Users should ensure that the environment variables LOGTALKHOME"
echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
echo "once prior to using the qplgt script."
echo