ci.yml

name: CI

on:
  push:
    branches: [ main ]
    tags: [ 'v*' ]
  pull_request:
    branches: [ main ]

permissions:
  packages: write

concurrency:
  group: ${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    name: Build (${{ matrix.variant.platform }})
    runs-on:
      group: ${{ matrix.variant.builder }}
    container:
      image: ghcr.io/zephyrproject-rtos/image-build:v1.0.0

    strategy:
      fail-fast: true
      matrix:
        variant:
        - platform: linux/amd64
          arch: amd64
          builder: zephyr-runner-v2-linux-x64-4xlarge
        - platform: linux/arm64
          arch: arm64
          builder: zephyr-runner-v2-linux-arm64-4xlarge

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

    - name: Generate metadata
      id: meta
      uses: docker/metadata-action@v5
      with:
        images: |
          ghcr.io/zephyrproject-rtos/ci-repo-cache
        flavor: |
          latest=false
          suffix=-${{ matrix.variant.arch }}
        tags: |
          type=ref,event=branch
          type=ref,event=tag
          type=ref,event=pr

    - name: Login to GitHub Container Registry
      if: ${{ github.event_name != 'pull_request' }}
      uses: redhat-actions/podman-login@v1
      with:
        registry: ghcr.io
        username: ${{ github.repository_owner }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Build image
      uses: redhat-actions/buildah-build@v2
      with:
        context: .
        containerfiles: Dockerfile
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}

    - name: Push image
      if: ${{ github.event_name != 'pull_request' }}
      uses: redhat-actions/push-to-registry@v2
      with:
        tags: ${{ steps.meta.outputs.tags }}

  merge:
    name: Merge
    runs-on:
      group: zephyr-runner-v2-linux-x64-4xlarge
    container:
      image: ghcr.io/zephyrproject-rtos/image-build:v1.0.0
    needs: build
    if: ${{ github.event_name != 'pull_request' }}

    steps:
    - name: Login to GitHub Container Registry
      uses: redhat-actions/podman-login@v1
      with:
        registry: ghcr.io
        username: ${{ github.repository_owner }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Generate metadata
      id: meta
      uses: docker/metadata-action@v5
      with:
        images: |
          ghcr.io/zephyrproject-rtos/ci-repo-cache
        flavor: |
          latest=false
        tags: |
          type=ref,event=branch
          type=ref,event=tag
          type=raw,value=latest,enable={{is_default_branch}}

    - name: Create multi-architecture image
      run: |
        archs=(amd64 arm64)
        image="ghcr.io/zephyrproject-rtos/ci-repo-cache:${{ steps.meta.outputs.version }}"
        image_tags="${{ steps.meta.outputs.tags }}"

        # Pull architecture-specific image.
        for arch in ${archs[@]}; do
          podman pull ${image}-${arch}
        done

        # Create multi-architecture image.
        for arch in ${archs[@]}; do
          image_amend_flags+="--amend ${image}-${arch} "
        done

        podman manifest create ${image} ${image_amend_flags}

        # Create image tags.
        for tag in ${image_tags}; do
          podman tag ${image} ${tag}
        done

    - name: Push image
      uses: redhat-actions/push-to-registry@v2
      with:
        tags: ${{ steps.meta.outputs.tags }}