Avoid NullPointerExceptions when rerouting vehicles #415

	name: Gradle Build

	on: [push, pull_request]

	permissions:
	contents: read

	jobs:
	build:
	runs-on: ubuntu-22.04

	steps:
	- name: Check out repository
	uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # (=v4.1.1)
	- name: Set up JDK 13
	uses: actions/setup-java@387ac29b308b003ca37ba93a6cab5eb57c8f5f93 # (=v4.0.0)
	with:
	java-version: '13'
	distribution: 'adopt'
	- name: Validate Gradle wrapper
	uses: gradle/wrapper-validation-action@699bb18358f12c5b78b37bb0111d3a0e2276e0e2 # (=v2.1.1)
	- name: Cache Gradle packages
	uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # (=v4.0.0)
	with:
	path: \|
	~/.gradle/caches
	~/.gradle/wrapper
	key: ${{ runner.os }}-gradle-${{ hashFiles('*/.gradle', '*/gradle-wrapper.properties') }}
	restore-keys: \|
	${{ runner.os }}-gradle-
	- name: Build with Gradle
	run: ./gradlew build
	- name: Cleanup Gradle Cache
	# Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
	# Restoring these files from a GitHub Actions cache might cause problems for future builds.
	run: \|
	rm -f ~/.gradle/caches/modules-2/modules-2.lock
	rm -f ~/.gradle/caches/modules-2/gc.properties

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