Provide hook to be called after all tasks have been executed but before buildFinished hook is called

What I am missing (or at least I have not been able to find) is a hook
that gets called after all tasks have been executed but before the build
is finished.

The hook 'buildFinished' is called after the command line says 'BUILD
SUCCESSFUL'. What I would like to have is a hook right after all tasks
have been executed so I can still decide whether the build has been
successful or not (depending on the outcome beyond one task). For
example, maybe I want to make the build fail if the project took more
than 10s to execute, or maybe I want to fail the build if more than 1000
tests have been run (across multiple test tasks), etc.