timetable/.github/workflows/docker-image.yaml

name: Docker image
on:
  push:
    tags:
      - '*'
  pull_request:
  workflow_dispatch:

jobs:
  build:
    name: Build
    uses: ./.github/workflows/build.yaml
  jib:
    needs:
      - build
    if: github.repository_owner == '2martens'
    name: Create and publish Docker image
    runs-on: ubuntu-latest
    permissions:
      id-token: write
      attestations: write

    steps:
      - uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 21
      - name: Setup Gradle
        uses: gradle/gradle-build-action@v2
        with:
          gradle-version: 8.5
          cache-read-only: true
      - name: Create and publish docker image
        if: github.event_name == 'push'
        run: ./gradlew -Prelease.useLastTag=true final jib
        env:
          USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
          PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
      - name: Create and publish docker image
        if: github.event_name == 'pull_request'
        run: ./gradlew snapshot jib
        env:
          USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
          PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
      - name: Extract Jib digest
        id: digest
        run: |
          DIGEST=$(cat build/jib-image.digest)
          echo "digest=$DIGEST" >> $GITHUB_OUTPUT
      - name: Perform docker login
        uses: docker/login-action@v3
        with:
          registry: docker.io
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}
      - name: Attest
        uses: actions/attest-build-provenance@v3
        id: attest
        with:
          subject-name: docker.io/2martens/timetable
          subject-digest: ${{ steps.digest.outputs.digest }}
          push-to-registry: true