1) This requires `repo upload` to be run from chroot (otherwise it asks for sudo password and still fails). This is definitely inconvenient.

2) This script has different behavior based on whether I have started cros_work
 - I typically do not start cros_work on when I am changing the model.yaml file. If that is the case, then the generated output does not line up with my changes.

3) The script does not ensure that the auto_generated file with the "correct checksum" (see point 2) is actually in your commit (instead of just your working directory)