docker-build.yml

name: Docker Image Push (on commit and base image update)

on:
  push:
    branches: [ "master" ]
  schedule:
    - cron: "30 */8 * * *"

env:
  IMAGE_OWNER: kimbtechnologies
  IMAGE_NAME: php_smtp_nginx
  BASE_IMAGE: kimbtechnologies/php_nginx:latest

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      
    # check if update needed
    - name: Check for new baseimage 
      id: check
      uses: lucacome/docker-image-update-checker@v1
      with:
        base-image: "${{env.BASE_IMAGE}}"
        image: "${{env.IMAGE_OWNER}}/${{env.IMAGE_NAME}}:latest"
      if: github.event_name != 'push'
    
    # setup build env.
    - name: Access repository contents
      uses: actions/checkout@v4
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}
    - name: Login to DockerHub
      uses: docker/login-action@v3
      with:
        username: ${{ secrets.DOCKER_USERNAME }}
        password: ${{ secrets.DOCKER_TOKEN }}
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}

    # build local AMD image
    - name: Build the AMD image
      run: docker build . --file "Dockerfile" --tag "$IMAGE_OWNER/$IMAGE_NAME:latest"
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}
    - name: Push tag 8-latest  
      run: docker tag "$IMAGE_OWNER/$IMAGE_NAME:latest" "$IMAGE_OWNER/$IMAGE_NAME:8-latest"; docker push "$IMAGE_OWNER/$IMAGE_NAME:8-latest";
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}

     # Multi platform support
    - name: Set up QEMU for Docker Buildx
      uses: docker/setup-qemu-action@v3
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}
  
    # Multi platform image build and push
    - name: Build and push the ARM Docker images
      run: php_v=$(docker run --rm "$IMAGE_OWNER/$IMAGE_NAME:latest" sh -c 'echo "$PHP_VERSION"'); php_v=$(echo $php_v | grep -o '[0-9\.]*'); docker buildx build --platform linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/arm64 . --file "Dockerfile" --tag "$IMAGE_OWNER/$IMAGE_NAME:latest" --tag "$IMAGE_OWNER/$IMAGE_NAME:php-$php_v" --push
      if: ${{ (github.event_name == 'push') || (steps.check.outputs.needs-updating == 'true') }}