#! /bin/sh

TOP_DIR=$(dirname $0)
LAST_DIR=$PWD

if test ! -f $TOP_DIR/configure.ac ; then
    echo "You must execute this script from the top level directory."
    exit 1
fi

AUTOCONF=${AUTOCONF:-autoconf}
ACLOCAL=${ACLOCAL:-aclocal}
AUTOHEADER=${AUTOHEADER:-autoheader}

dump_help_screen ()
{
    echo "Usage: gen-auto-scripts.sh [options]"
    echo 
    echo "options:"
    echo "  -n           skip CVS changelog creation"
    echo "  -h,--help    show this help screen"
    echo
    exit 0
}

parse_options ()
{
    while test "$1" != "" ; do
        case $1 in
            -h|--help)
                dump_help_screen
                ;;
            -n)
                SKIP_CVS_CHANGELOG=yes
                ;;
            *)
                echo Invalid argument - $1
                dump_help_screen
                ;;
        esac
        shift
    done
}

run_or_die ()
{
    COMMAND=$1

    # check for empty commands
    if test -z "$COMMAND" ; then
        echo "*warning* no command specified"
        return 1
    fi

    shift;

    OPTIONS="$@"

    # print a message
    printf "%s" "*info* running $COMMAND"
    if test -n "$OPTIONS" ; then
        echo " ($OPTIONS)"
    else
        echo
    fi

    # run or die
    $COMMAND $OPTIONS ; RESULT=$?
    if test $RESULT -ne 0 ; then
        echo "*error* $COMMAND failed. (exit code = $RESULT)"
        exit 1
    fi

    return 0
}

parse_options "$@"

cd $TOP_DIR

run_or_die $ACLOCAL -I m4
run_or_die $AUTOHEADER
run_or_die $AUTOCONF

cd $LAST_DIR

