[fukka42]

U-Boot is pretty cool, I like how scriptable it is.

[joezydeco]

U-boot is scriptable, but it's awkward. You put snippets of shell-like commands into environment variables and then connect them all together. It's the most powerful bootloader I've ever worked with, but writing new stuff and debugging it is tedious.

[rcxdude]

Yeah, I strongly prefer barebox, if it's an option. You can just write shell scripts in it.