How to detect misconfigured dependencies that trigger unnecessary task reruns?

[ssbarnea]

On project with multiple developers we are unlikely to be able to have a single person gating changes made to taskfiles and even if we would do, it is too easy to introduce dependency errors which would make task run when they should not.

To address this one could try to modify how tasks are run on CI to cause failures if on second consecutive run they do not report up-to-date.

The issue is that the boilerplate code needed for doing this is really ugly

task build && \
task build |& tail -n 1 f || grep -v 'is up to date' >/dev/null || \
{ echo "Failed as task command did not had 'sources' and 'generates' correctly defined."; exit 55;}

Is there a better way to implement this?