Bump actions/checkout from 3 to 4 #21

	name: Clear Cache

	on:
	pull_request:
	types:
	- closed

	jobs:
	cleanup:
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Cleanup
	run: \|
	gh extension install actions/gh-actions-cache

	REPO=${{ github.repository }}
	BRANCH="refs/pull/${{ github.event.pull_request.number }}/merge"

	while true
	do
	cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH -L 100 \| cut -f 1 )

	if [ -z "$cacheKeysForPR" ]
	then
	break
	fi

	## Setting this to not fail the workflow while deleting cache keys.
	set +e
	for cacheKey in $cacheKeysForPR
	do
	gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
	done
	done
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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