#!/bin/sh
#
# Shell script wrapper to convert Lua to C and optionally
# compile and run it.
#
# option -c causes compilation only (no run)
# option -C causes C source generation only (no compile or run)

pushd "`dirname \"$0\"`" > /dev/null
export CWD="$PWD"
popd > /dev/null

# You may need to change these variables:
LUA=lua
CC=gcc
CFLAGS="-O3 -fomit-frame-pointer -DNDEBUG -Wall -Ilua/src"
#CFLAGS="-O2 -DNDEBUG -Wall -Ilua/src"
#CFLAGS=-g
LFLAGS="-Llua/src -llua"
LUA2C="${LUA} $CWD/lua2c.lua"
#LUA2C="./lua2c"

COMPILEONLY=
if [ "$1" = "-c" ]
then
  COMPILEONLY=1
  shift
elif [ "$1" = "-C" ]
then
  COMPILEONLY=2
  shift
fi
if [ "$1" = "" ]
then
  echo "usage: clua [options] [filename.lua] ..."
  echo "  options:"
  echo "    -c   compile only (no run)"
  echo "    -C   generate C source only (no compile or run)"
  exit 1
fi

LUAFILE=$1
FILENAME=${LUAFILE%.*}
CFILE=${FILENAME}.c

LUA_PATH=$CWD/lib/?.lua ${LUA2C} ${LUAFILE} > ${CFILE} || exit 1
if [ "$COMPILEONLY" = "2" ]
then
  exit 0
fi

${CC} ${CFLAGS} ${CFILE} -o ${FILENAME} ${LFLAGS} || exit 1
if [ "$COMPILEONLY" = "1" ]
then
  exit 0
fi

shift
./${FILENAME} $@