Cache Maven Dependencies #110

	name: "Cache Maven Dependencies"

	on:
	workflow_dispatch:
	schedule:
	- cron: '57 4 * * Sun'

	env:
	MAVEN_CACHE_REF: refs/heads/main
	MAVEN_CACHE_KEY: maven-dependencies
	MAVEN_CACHE_DIR: ~/.m2

	jobs:
	update-cache:
	runs-on: ubuntu-latest
	permissions:
	actions: write # needed to delete caches
	steps:
	- name: "Checkout"
	uses: actions/checkout@v6
	with:
	ref: ${{ env.MAVEN_CACHE_REF }}

	- name: "Setup Java"
	uses: actions/setup-java@v5
	with:
	distribution: "sapmachine"
	java-version: 17

	- name: "Download Dependencies"
	run: mvn -B dependency:go-offline

	- name: "Delete Existing Caches"
	run: \|
	CACHE_IDS=$(gh cache list --key "${{ env.MAVEN_CACHE_KEY }}" --ref "${{ env.MAVEN_CACHE_REF }}" --json id \| jq -r '.[] \| .id')
	for CACHE_ID in $CACHE_IDS; do
	echo "Deleting cache with ID: $CACHE_ID"
	gh cache delete "${CACHE_ID}"
	done
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: "Cache Dependencies"
	uses: actions/cache/save@v5
	with:
	path: ${{ env.MAVEN_CACHE_DIR }}
	key: ${{ env.MAVEN_CACHE_KEY }}

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