enh(ci): simplify environment conditions #59

	name: clean-cache

	on:
	pull_request_target:
	types:
	- closed
	pull_request:
	types:
	- closed

	jobs:
	clean-cache:
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout sources
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7

	- name: Install github cli
	run: \|
	curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg \| sudo dd of=/usr/share/keyrings/githubcli-archive-keyring.gpg
	sudo chmod go+r /usr/share/keyrings/githubcli-archive-keyring.gpg
	echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" \| sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
	sudo apt update
	sudo apt install -y gh
	shell: bash

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

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

	echo "Fetching list of cache key"
	cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH \| cut -f 1 )

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

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