Here is yet more example of the power of fe_ and fx_ functions in lbmk:
https://browse.libreboot.org/lbmk.git/commit/?id=5686f35e0f1522d45361f042adc135b5782eae32
Using them, I was able to reduce the size of the extract_intel_me_bruteforce() function in half. Reducing the sloccount by 18.
Doing this kind of programming in sh isn't all that common but lbmk does all kinds of weird hacks like this.