#!/bin/bash

# bash script to execute ./lib/${CS_ARCH}/${CMD} where

# CS_ARCH is to be determined, hopefully macos or cats

# CMD is the basename of this script

# script checks we are on a 64-bit system before doing anything else

# check we on a 64-bit OS

test `getconf LONG_BIT` != "64" && echo "Sorry, this only runs on a 64-bit operating system!" && exit -1

# break open a pathname to our command - the original must include '/' somewhere

complete_fullpath()

{

original="${1}"

architecture="${2}"

# executable's name - drop everything up to the last /

command="${original##*/}"

# parent directory's path - drop everything after the last /

fullpath="${original%/*}"

# fullpath must be shorter than original if it contained a directory, ie /

if [ "${fullpath}" == "${original}" ] ; then

echo "Cannot find the architecture specific version of ${original}"

echo "A directory name must be included in the pathname used to execute it"

exit -1

fi

# work out full path to command's directory using cd and pwd in a sub-shell

fullpath=$( (cd "${fullpath}" && pwd) )

# construct final path

fullpath="${fullpath}/lib/${architecture}/${command}"

# check that it is executable

if [ ! -x "${fullpath}" ] ; then

echo "Cannot find the architecture specific version of ${original}"

echo "Have you run make?"

exit -1

fi

}

# if on a Mac architecture is macos, otherwise cats

if test -x /usr/bin/uname && test `/usr/bin/uname -s` == "Darwin" ; then

architecture="macos"

else

architecture="cats"

fi

complete_fullpath "${0}" "${architecture}"

exec "${fullpath}" "${@}"