#!/usr/bin/env bash
set -e
set -u

pp_class="${1%*.hpp}"
pp_class="${pp_class#crap/*}"
pp_include="#include \"$1\""
pp_redefine="#define CrapPlug Crap_$pp_class"
out="$2"
template="$3"

(cat "$template" | while read -r; do
    case "$REPLY" in

    '//#INCLUDE') echo "$pp_include" ;;
    '//#REDEFINE') echo "$pp_redefine" ;;

    *) echo -E "$REPLY" ;;
    esac
done) > "$out"