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#!/bin/sh
#
# A wrapper script for the HEASoft tools, to avoid the annoying
# conflicts between system libraries and the HEASoft bundled
# libraries due to the '$LD_LIBRARY_PATH' settings.
#
# This wrapper is inspired by CIAO.
#
# Weitian LI <liweitianux@live.com>
# Created: 2013-05-18
# Updated: 2018-05-16
#
#
# Setup:
# ------------------------------------------------------------------------
# 1. Copy this wrapper to '~/.heasoft/heasoft.sh'.
# 2. Add the following shell function to your shell config file.
# NOTE: edit 'HEADAS' to match your case.
#
# Shell configuration:
# ------------------------------------------------------------------------
# heainit() {
# local ld_lib_bak i tool
# local wrapper="${HOME}/.heasoft/heasoft.sh"
# local wrapper_dir=$(dirname ${wrapper})
# local wrapper_name=$(basename ${wrapper})
# if [ -z "${HEADAS}" ]; then
# ld_lib_bak=${LD_LIBRARY_PATH}
# export HEADAS="${HOME}/local/heasoft/default/PORTAL"
# source ${HEADAS}/headas-init.sh
# export LD_LIBRARY_PATH=${ld_lib_bak}
# export PATH="${wrapper_dir}:${PATH}"
#
# if [ ! -f "${wrapper}" ]; then
# echo "ERROR: wrapper '${wrapper}' not found!"
# return
# fi
# chmod u=rwx ${wrapper}
#
# echo "Initializing HEASoft from ${HEADAS} ..."
# for i in ${HEADAS}/bin/*; do
# tool=$(basename $i)
# ln -sf ${wrapper_name} ${wrapper_dir}/${tool}
# done
# rehash
#
# echo "HEASoft initialized."
# else
# echo "HEASoft already initialized from: ${HEADAS}"
# fi
# }
# ------------------------------------------------------------------------
TOOL="${0##*/}"
BIN_PATH="${HEADAS}/bin"
LD_LIBRARY_PATH="${HEADAS}/lib"
if [ -z "${HEADAS}" ]; then
echo "ERROR: environment variable 'HEADAS' not set!" >&2
exit 1
elif [ -x "${BIN_PATH}/${TOOL}" ]; then
export LD_LIBRARY_PATH
exec ${BIN_PATH}/${TOOL} "$@"
else
echo "ERROR: tool '${TOOL}' not found in ${BIN_PATH}!" >&2
exit 2
fi
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