A Common Test hook that turns every skip nobody allowed into a failure.

rebar3 ct exits 0 when a case skips itself ({skip, Reason} from the case, init_per_testcase, init_per_group or init_per_suite): the run reads as green although the test never ran. This hook rewrites such a skip into {fail, {skip_not_allowed, Reason}}, so the case is reported as failed (or its group or suite as auto skipped) and rebar3 exits 1.

A skip that is genuinely wanted is allowed explicitly, per suite, with the reason it is safe:

{ct_opts, [{ct_hooks, [{cth_skip_is_failure, [{allow, [{my_SUITE, a_case, "why skipping it here is safe"}, {dist_SUITE, '*', "needs distribution; run by ct_dist.sh"}]}]}]}]}.

The second element is the case name, or '*' for any skip in that suite, including its init_per_suite and init_per_group. An allowance without a reason is refused when the hook starts, so the run does not start.