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#!/bin/bash

###########################################################################
#   Copyright (C) 2012 by Simon Dales   #
#   simon@purrsoft.co.uk   #
#                                                                         #
#   This program is free software; you can redistribute it and/or modify  #
#   it under the terms of the GNU General Public License as published by  #
#   the Free Software Foundation; either version 2 of the License, or     #
#   (at your option) any later version.                                   #
#                                                                         #
#   This program is distributed in the hope that it will be useful,       #
#   but WITHOUT ANY WARRANTY; without even the implied warranty of        #
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         #
#   GNU General Public License for more details.                          #
#                                                                         #
#   You should have received a copy of the GNU General Public License     #
#   along with this program; if not, write to the                         #
#   Free Software Foundation, Inc.,                                       #
#   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             #
###########################################################################

##! \brief test executable to see if it exists
test_executable(){
	P_EXE="$1"
	#########
	WHICH=`which ${P_EXE}`
	if test -z "${WHICH}"
	then
		echo "not found \"${P_EXE}\""
	else
		EXE="${P_EXE}"
	fi
	}

##! \brief sets the lua interpreter
set_lua(){
	test_executable 'texlua'
	if test -z "${EXE}"
	then
		test_executable 'lua'
	fi
	#echo "final EXE=\"${EXE}\""
	}

##! \brief makes canonical name of file
##! 
##! Note that "readlink -f" doesn't work in MacOSX
##! 
do_readlink(){
	pushd . > /dev/null
	TARGET_FILE=$1
	
	cd `dirname $TARGET_FILE`
	TARGET_FILE=`basename $TARGET_FILE`
	
	# Iterate down a (possible) chain of symlinks
	while [ -L "$TARGET_FILE" ]
	do
		TARGET_FILE=`readlink $TARGET_FILE`
		cd `dirname $TARGET_FILE`
		TARGET_FILE=`basename $TARGET_FILE`
	done
	
	PHYS_DIR=`pwd -P`
	RESULT=$PHYS_DIR
	popd > /dev/null
	}

##main
set_lua
if test -z "${EXE}"
then
	echo "no lua interpreter available"
else
	BASENAME=`basename "$0"`
	do_readlink "$0"
	DIRNAME="${RESULT}"
		
	LUASCRIPT="${DIRNAME}/lua2dox.lua ${BASENAME}"
	#echo "lua[${LUASCRIPT}]"

	${EXE} ${LUASCRIPT} $@
fi
# 
##eof