PyO3: Update wheel workflow #5

	name: Clean branch caches
	on:
	pull_request:
	types:
	- closed

	# https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#force-deleting-cache-entries
	jobs:
	clean-caches:
	runs-on: ubuntu-latest
	steps:
	- name: Clean caches
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	GH_REPO: ${{ github.repository }}
	BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge
	run: \|
	echo "Fetching cache keys for: $BRANCH"
	cache_keys_for_pr=$(gh cache list --ref "$BRANCH" --limit 100 --json id --jq '.[].id')

	## Setting this to not fail the workflow while deleting cache keys.
	set +e
	echo "Deleting caches..."
	for cache_key in $cache_keys_for_pr; do
	echo "Deleting cache key: $cache_key"
	gh cache delete "$cache_key"
	done
	echo "Done"

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