Docker cache #332

	name: Build and publish JVM-based images
	on:
	push:
	branches:
	- main
	tags:
	- 'v..*'
	pull_request:
	branches:
	- main

	jobs:
	build_jvm_docker_image:
	name: Build and publish the JVM-based Docker image
	runs-on: ubuntu-22.04
	env:
	DOCKER_IMAGE_NAME: '${{ github.repository_owner }}/jhipster-lite'

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Extract Docker metadata
	id: meta
	uses: docker/metadata-action@v5.5.1
	with:
	images: ${{ env.DOCKER_IMAGE_NAME }}

	- name: Login to Docker Registry
	if: ${{ startsWith(github.ref, 'refs/tags/v') }}
	env:
	DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
	uses: docker/login-action@v3.1.0
	id: login-hub
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Restore cache for local Maven repository
	id: cache
	uses: actions/cache@v4
	with:
	path: maven-repository
	key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}

	- name: inject maven-cache into docker
	uses: reproducible-containers/buildkit-cache-dance@v3.1.0
	with:
	cache-map: \|
	{
	'maven-repository': '/root/.m2'
	}
	skip-extraction: ${{ steps.cache.outputs.cache-hit }}

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Build the JVM-based Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	push: ${{ startsWith(github.ref, 'refs/tags/v') }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max

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