buildah-build/.github/workflows/docker_metadata_action.yml

# This workflow will perform a test whenever there
# is some change in code done to ensure that the changes
# are not buggy and we are getting the desired output.
name: Build with docker/metadata-action@v2
on:
  push:
  pull_request:
  workflow_dispatch:
  schedule:
    - cron: '0 0 * * *'  # every day at midnight

env:
  IMAGE_NAME: "hello-world"

jobs:
  build:
    name: Build image using Buildah
    runs-on: ubuntu-20.04
    strategy:
      fail-fast: false
      matrix:
        install_latest: [ true, false ]

    steps:

      # Checkout buildah action github repository
      - name: Checkout Buildah action
        uses: actions/checkout@v2

      - name: Docker Metadata
        id: docker-metadata
        uses: docker/metadata-action@v3
        with:
          images: |
            ${{ env.IMAGE_NAME }}            
          tags: |
            type=edge
            type=sha
            type=ref,event=branch
            type=ref,event=pr
            type=schedule
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }}            

      - name: Install latest buildah
        if: matrix.install_latest
        run: |
          bash .github/install_latest_buildah.sh          

      - name: Create Dockerfile
        run: |
          cat > Containerfile<<EOF
          FROM busybox
          RUN echo "hello world"
          EOF          

      # Build image using Buildah action
      - name: Build Image
        id: build_image
        uses: ./
        with:
          layers: false
          tags: ${{ steps.docker-metadata.outputs.tags }}
          containerfiles: |
            ./Containerfile            
          extra-args: |
            --pull            

      - name: Echo Outputs
        run: |
          echo "Image: ${{ steps.build_image.outputs.image }}"
          echo "Tags: ${{ steps.build_image.outputs.tags }}"
          echo "Tagged Image: ${{ steps.build_image.outputs.image-with-tag }}"          

      # Check if image is build
      - name: Check images created
        run: buildah images | grep '${{ env.IMAGE_NAME }}'