#!/bin/sh

VERSION=$(cat version)

DATE=$(date +%Y%m%d)

PREFIX_DEFAULT=/usr/local

BINDIR_DEFAULT="${PREFIX}/bin"

LIBDIR_DEFAULT="${PREFIX}/lib"

DOCDIR_DEFAULT="${PREFIX}/share/doc"

MANDIR_DEFAULT="${PREFIX}/share/man"

BINDIR_set=

LIBDIR_set=

DOCDIR_set=

MANDIR_set=

get_optval(){

    local ret

    case "$1" in

        --*=?*)

            echo "${1:9}"

            ret=0

            ;;

        *)

            echo "${2}"

            ret=1

            ;;

    esac

    return ${ret}

}

set_prefix() {

    local ret

    PREFIX=$(get_optval "$1" "$2")

    ret=$?

    [ -z "${BINDIR_set}" ] && BINDIR="${PREFIX}/bin"

    [ -z "${LIBDIR_set}" ] && LIBDIR="${PREFIX}/lib"

    [ -z "${DOCDIR_set}" ] && DOCDIR="${PREFIX}/share/doc"

    [ -z "${MANDIR_set}" ] && MANDIR="${PREFIX}/share/man"

    return ${ret}

}

set_bindir() {

    local ret

    BINDIR=$(get_optval "$1" "$2")

    ret=$?

    BINDIR_set=1

    return ${ret}

}

set_libdir() {

    local ret

    LIBDIR=$(get_optval "$1" "$2")

    ret=$?

    LIBDIR_set=1

    return ${ret}

}

set_docdir() {

    local ret

    DOCDIR=$(get_optval "$1" "$2")

    ret=$?

    DOCDIR_set=1

    return ${ret}

}

set_mandir() {

    local ret

    MANDIR=$(get_optval "$1" "$2")

    ret=$?

    MANDIR_set=1

    return ${ret}

}

do_help() {

    cat <<__EOF__

\`configure' configures ct-ng ${VERSION} to adapt to many kind of systems.

USAGE: ./configure [OPTION]...

Defaults for the options are specified in brackets.

Configuration:

  -h, --help              display this help and exit                                                                                                                  

  --prefix=PREFIX         install architecture-independent files in PREFIX

                          [${PREFIX_DEFAULT}]

By default, \`make install' will install all the files in

\`${PREFIX_DEFAULT}/bin', \`${PREFIX_DEFAULT}/lib' etc.  You can specify

an installation prefix other than \`${PREFIX_DEFAULT}' using \`--prefix',

for instance \`--prefix=\${HOME}'.

For better control, use the options below.

Fine tuning of the installation directories:

  --bindir=DIR           user executables [PREFIX/bin]

  --libdir=DIR           object code libraries [PREFIX/lib]

  --docdir=DIR           info documentation [PREFIX/share/doc]

  --mandir=DIR           man documentation [PREFIX/share/man]

__EOF__

}

while [ $# -ne 0 ]; do

    case "$1" in

        --prefix*)  set_prefix "$1" "$2" && shift || shift 2;;

        --bindir*)  set_bindir "$1" "$2" && shift || shift 2;;

        --libdir*)  set_libdir "$1" "$2" && shift || shift 2;;

        --docdir*)  set_docdir "$1" "$2" && shift || shift 2;;

        --mandir*)  set_mandir "$1" "$2" && shift || shift 2;;

        --help|-h)  do_help; exit 0;;

        *)          do_help; exit 1;;

    esac

done

[ -z "${PREFIX}" ] && set_prefix --prefix "${PREFIX_DEFAULT}"

sed -r -e "s,@@BINDIR@@,${BINDIR},g;"   \

       -e "s,@@LIBDIR@@,${LIBDIR},g;"   \

       -e "s,@@DOCDIR@@,${DOCDIR},g;"   \

       -e "s,@@MANDIR@@,${MANDIR},g;"   \

       -e "s,@@VERSION@@,${VERSION},g;" \

       -e "s,@@DATE@@,${DATE},g;"       \

        Makefile.in >Makefile