CI: reset existing repo to known state #11880
Merged
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If at some point a PR accidentally deletes a git submodule without
deleting it from .gitmodules, subsequent PRs using the same runner will
fail because the checkout action will try to run
git submodule foreach ...
before updating the git repo to match the current PR and fail, wecan avoid the problem by always resetting to origin/master which
hopefully is always in a good state.
Ideally the checkout action would be more robust: actions/checkout#354