CLI: Error on compiler warnings in tests (backport #12894) #12895
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(cherry picked from commit d58d874)
This previously emitted a warning because Elixir will rebind `this_node` by default, so the `this_node` binding in the line above was unused. (As opposed to Erlang which would treat this as a match - rejecting the binding if `this_node` was not equal to the value being matched.) The node needed to be adjusted as well - `node()` returned the ExUnit runner's node while the command returned the remote node, which is stored in the context under `opts.node`. (cherry picked from commit c328922)
This check is expected to succeed and the status is expected to be printed to stdout rather than stderr. This change silences the status output. The status text was printed mistakenly previously because we captured stderr rather than stdout. (cherry picked from commit 9f60325)
(cherry picked from commit 430cd2f)
(cherry picked from commit 9b6ab77)
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This is similar to #10459 but focused on
makeinstead. #10459 also only focused on warnings inlib/files while this change causes CLI tests to fail when the test modules contain warnings. We need to add the--warnings-as-errorsflag tomix test(added in Elixir 1.12). We can at the same time check that thelib/files compile without warning by compiling with--warnings-as-errorsas well.Most compiler warnings fixed were benign. The shadowing diagnostics like unused bindings are useful though - one fix covered an unused binding that should've been a match (i.e. needed the pin operator
^).This is an automatic backport of pull request #12894 done by Mergify.