#!/usr/bin/env bash
#
# $Id$
# Author: Markus Wenzel, TU Muenchen
# License: GPL (GNU GENERAL PUBLIC LICENSE)
#
# DESCRIPTION: get values from Isabelle settings environment
## diagnostics
PRG="$(basename "$0")"
function usage()
{
echo
echo "Usage: $PRG [OPTIONS] [VARNAMES ...]"
echo
echo " Options are:"
echo " -a display complete environment"
echo " -b print values only (doesn't work for -a)"
echo
echo " Get value of VARNAMES from the Isabelle settings."
echo
exit 1
}
## process command line
# options
ALL=""
BASE=""
while getopts "ab" OPT
do
case "$OPT" in
a)
ALL=true
;;
b)
BASE=true
;;
\?)
usage
;;
esac
done
shift $(($OPTIND - 1))
# args
[ -n "$ALL" -a "$#" -ne 0 ] && usage
## main
if [ -n "$ALL" ]; then
env | sort
else
for VAR in "$@"
do
if [ -n "$BASE" ]; then
eval "echo \$$VAR"
else
eval "echo $VAR=\$$VAR"
fi
done
fi