Potential fix for code scanning alert no. 96: Use of a broken or weak cryptographic hashing algorithm on sensitive data #1605

	# originates from https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/caching-dependencies-to-speed-up-workflows#managing-caches
	name: cleanup caches by a branch
	on:
	pull_request:
	types:
	- closed

	jobs:
	cleanup:
	runs-on: ubuntu-latest
	permissions:
	actions: write
	steps:
	- name: Cleanup
	run: \|
	echo "Fetching list of cache keys"
	cacheKeysForPR=$(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 cacheKey in $cacheKeysForPR
	do
	gh cache delete $cacheKey
	done
	echo "Done"
	env:
	GH_TOKEN: ${{ github.token }}
	GH_REPO: ${{ github.repository }}
	BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge

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