ci: Harden release workflow handling #78059

	name: Cleanup branch caches
	on:
	pull_request:
	types: [opened, closed, reopened, synchronize]
	push:
	workflow_dispatch:
	workflow_call:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	permissions:
	actions: write

	jobs:
	cleanup:
	runs-on: ubuntu-latest
	timeout-minutes: 30
	if: ${{ github.ref != 'refs/heads/main' }}
	steps:
	- name: Cleanup
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	REPO=${{ github.repository }}
	BRANCH=${{ github.ref }}

	echo "Fetching cache ids for ${BRANCH}"
	cacheIdsForBranch=$(gh api --method GET "repos/${REPO}/actions/caches" \
	-f ref="${BRANCH}" \
	-f per_page=100 \
	--jq '.actions_caches[].id')

	# Cache deletion is best-effort so cleanup failures do not fail CI.
	set +e
	echo "Deleting caches..."
	for cacheId in $cacheIdsForBranch
	do
	gh api --method DELETE "repos/${REPO}/actions/caches/${cacheId}"
	done
	echo "Done"

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