set -e

die() {
    printf "%s: error: %s\n" "$FILENAME" "$1" >&2
    exit 1
}

include() {
    if [ ! -f "$1" ]; then
        die "Can't include '$1'."
    fi
    awk -Pf preproc/interp.awk $1 | sh
}

include_raw() {
    if [ ! -f "$1" ]; then
        die "Can't include '$1'."
    fi
    cat "$1"
}

include_md() {
    if [ ! -f "$1" ]; then
        die "Can't include '$1'."
    fi
    lowdown -thtml "$1"
}