#! /bin/sh

# $Progeny$$

# This program is in the public domain.

# Too bad we don't have something like sysexits.h for POSIX sh...
EX_USAGE=64

:; VARS="${VARS} major_version"; VARS="${VARS} minor_version"; VARS="${VARS} micro_version"; VARS="${VARS} version"; VARS="${VARS} cppflags"; VARS="${VARS} ldflags"; VARS="${VARS} libs"; VARS="${VARS} prefix"; VARS="${VARS} exec_prefix"; VARS="${VARS} bindir"; VARS="${VARS} sbindir"; VARS="${VARS} libexecdir"; VARS="${VARS} datadir"; VARS="${VARS} sysconfdir"; VARS="${VARS} sharedstatedir"; VARS="${VARS} localstatedir"; VARS="${VARS} libdir"; VARS="${VARS} includedir"; VARS="${VARS} oldincludedir"; VARS="${VARS} infodir"; VARS="${VARS} mandir"; VARS="${VARS} build"; VARS="${VARS} build_cpu"; VARS="${VARS} build_vendor"; VARS="${VARS} build_os"; VARS="${VARS} host"; VARS="${VARS} host_cpu"; VARS="${VARS} host_vendor"; VARS="${VARS} host_os"; VARS="${VARS} target"; VARS="${VARS} target_cpu"; VARS="${VARS} target_vendor"; VARS="${VARS} target_os"; VARS="${VARS} lt_current"; VARS="${VARS} lt_revision"; VARS="${VARS} lt_age"
:; major_version="2"; minor_version="1"; micro_version="0"; version="${major_version}.${minor_version}.${micro_version}"; cppflags=""; ldflags=""; libs="-ldiscover -lusb-1.0 -lexpat "; prefix="/usr"; exec_prefix="/usr/local"; bindir="${exec_prefix}/bin"; sbindir="/sbin"; libexecdir="${exec_prefix}/libexec"; datadir="${datarootdir}"; sysconfdir="/etc"; sharedstatedir="${prefix}/com"; localstatedir="/var"; libdir="${prefix}/lib/x86_64-linux-gnu"; includedir="${prefix}/include"; oldincludedir="/usr/include"; infodir="${prefix}/share/info"; mandir="${prefix}/share/man"; build="x86_64-pc-linux-gnu"; build_cpu="x86_64"; build_vendor="pc"; build_os="linux-gnu"; host="x86_64-pc-linux-gnu"; host_cpu="x86_64"; host_vendor="pc"; host_os="linux-gnu"; target="x86_64-pc-linux-gnu"; target_cpu="x86_64"; target_vendor="pc"; target_os="linux-gnu"; lt_current="2"; lt_revision="1"; lt_age="0"

usage ()
{
    cat <<EOF
usage: $0 --VAR ...

Print the value of the variable VAR.  Run $0 -l or $0 --list for a list
of valid variable names.
EOF
}

listvars ()
{
    for i in ${VARS}; do
        echo ${i}
    done
}

have ()
{
    var=$1

    for i in ${VARS}; do
        if [ ${var} = ${i} ]; then
            return 0
        fi
    done

    return 1
}

###############################################################################

if [ $# -eq 0 ]; then
    usage
    exit ${EX_USAGE}
fi

while [ $# -gt 0 ]; do
    case $1 in
    -l|--list-vars)
        listvars
        break
        ;;

    --)
        usage
        exit ${EXIT_USAGE}
        ;;

    --*)
        var=$(echo $1 | sed -e 's/^--//' -e 's/-/_/g')
        if have ${var}; then
            eval val="\$${var}"
            echo ${val}
        else
            usage
            exit ${EX_USAGE}
        fi
        ;;

    *)
        usage
        exit ${EX_USAGE}
    esac

    shift
done

exit 0