build.yml

name: Build and publish image to ghcr.io/epics-containers

on:
  push:
  pull_request:

jobs:
  build:
    # pull requests are a duplicate of a branch push if within the same repo.
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        epics-target: [linux-x86_64] # , linux-aarch64]
        include:
          - os: ubuntu-latest # everyone is on ubuntu-latest
          - epics-target: linux-x86_64
            platform: linux/amd64

          # # a temporary name until multi-arch is supported
          # - epics-target: linux-aarch64
          #     extension: -native-aarch64
          #     platform: linux/arm64

    runs-on: ${{ matrix.os }}
    env:
      TAG: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}
    steps:
      - name: Log in to GitHub Docker Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io/${{ github.repository_owner }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Build image
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          target: final
          cache-from: type=gha,scope=${{ matrix.epics-target }}
          cache-to: type=gha,mode=max,scope=${{ matrix.epics-target }}
          tags: ci_test
          load: true

      - name: Test image
        # Opportunity to run tests using docker run 'ci_test'
        if: ${{ matrix.epics-target == 'linux-x86_64' }}
        run: if [ -f tests/run-tests.sh ]; then tests/run-tests.sh ci_test; fi

      - name: Push final image
        if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          target: final
          tags: ${{ env.TAG }}:${{ github.ref_name }}
          push: true

      - name: Push debug image
        if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          target: builder
          tags: ${{ env.TAG }}-debug:${{ github.ref_name }}
          push: true

  release:
    # Release on tag push
    needs: [build]
    if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
    runs-on: ubuntu-latest

    steps:
      - name: Github Release
        uses: softprops/action-gh-release@c062e08bd532815e2082a85e87e3ef29c3e6d191 # v2.0.8
        with:
          generate_release_notes: true