stage0.yml

name: prepare

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

on:
  push:
    branches: '*'
  pull_request:
    branches: '*'

jobs:
  build_docker_image:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        os: [oraclelinux-9, oraclelinux-8, rockylinux-8]
    steps:
      - uses: actions/checkout@v3
      - name: set lower case owner name
        run: |
          echo "ACTOR_LC=${OWNER,,}" >>${GITHUB_ENV}
        env:
          OWNER: '${{ github.actor }}'
      - name: IMAGE OS info
        run: echo ${{ matrix.os }}
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
            registry: ${{ env.REGISTRY }}
            username: ${{ github.actor }}
            password: ${{ secrets.DOCKER_LOGIN }}
      - name: Extract metadata (tags, labels) for Docker
        run: |
          IFS=- read -r OS_NAME OS_TAG <<< ${{ matrix.os }}
          echo "${{ matrix.os }}_OS_NAME=$OS_NAME" >>${GITHUB_ENV}
          echo "${{ matrix.os }}_OS_TAG=$OS_TAG" >>${GITHUB_ENV}         
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: docker/Dockerfile
          build-args: |
              OS_DISTRO=${{ env[format('{0}_OS_NAME', matrix.os)] }}
              OS_RELEASE=${{ env[format('{0}_OS_TAG', matrix.os)] }}
          push: true
          tags: ${{ env.REGISTRY }}/${{ env.ACTOR_LC }}/${{ env[format('{0}_OS_NAME', matrix.os)] }}:${{ env[format('{0}_OS_TAG', matrix.os)] }}
          cache-from: type=gha,scope=build-${{ matrix.os }}
          cache-to: type=gha,mode=max,scope=build-${{ matrix.os }}