[GHA] Cache cleanup workload #39

	name: Cleanup cache
	on:
	pull_request:
	types:
	- closed

	jobs:
	cleanup:
	runs-on: ubuntu-latest

	permissions:
	actions: write
	contents: read

	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	REPO: ${{ github.repository }}
	BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge

	steps:
	- name: Preconditions (Install gh-actions-cache)
	run: \|
	gh extension install actions/gh-actions-cache

	- name: Cleanup PR's caches
	run: \|
	echo "Fetching list of cache keys for ${BRANCH}"
	CACHE_KEYS_FOR_PR=$(gh actions-cache list -R $REPO -B $BRANCH -L 100 \| cut -f 1 )

	set +e
	echo "Deleting caches..."
	for CACHE_KEY in $CACHE_KEYS_FOR_PR
	do
	gh actions-cache delete $CACHE_KEY -R $REPO -B $BRANCH --confirm
	done
	echo "Done"

	- name: Cleanup master's caches
	if: github.event.pull_request.merged == true
	env:
	BRANCH: master
	KEYS: "ccache-linux-ubuntu ccache-Build-linux-debian ccache-Build-linux-android ccache-Build-linux-arm64"
	run: \|
	for KEY in ${KEYS[@]}
	do
	echo "Fetching list of cache with key ${KEY} for ${BRANCH}"
	CACHE_KEYS=( $(gh actions-cache list -R $REPO -B $BRANCH -L 100 --key $KEY --sort created-at --order desc \| cut -f 1) )
	CACHE_KEYS_OLD=("${CACHE_KEYS[@]:1}")
	echo "${CACHE_KEYS_OLD[@]}"
	set +e
	if [[ ${#CACHE_KEYS_OLD[@]} -gt 0 ]]
	then
	echo "Deleting caches..."
	for CACHE_KEY in ${CACHE_KEYS_OLD[@]}
	do
	if [[ ! -z "$CACHE_KEY" ]]
	then
	gh actions-cache delete $CACHE_KEY -R $REPO -B $BRANCH --confirm
	fi
	done
	fi
	done
	echo "Done"

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