Automatically discover and build Dockerfiles with different tags

docker-image-ci.yml

name: Docker Image CI

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  workflow_dispatch:

jobs:
  prebuild-files:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.matrix.outputs.value }}
    steps:
      - uses: actions/checkout@v3
      - id: matrix
        run: |
          echo ::set-output name=value::$(ls Dockerfile Dockerfile.* 2>/dev/null | sed -r 's/Dockerfile\.?//g' | jq -R -s -c 'split("\n")[:-1]')

  build-file:
    needs: prebuild-files
    if: needs.prebuild-files.outputs.matrix != '[]'
    runs-on: ubuntu-latest
    strategy:
      matrix:
        value: ${{fromJson(needs.prebuild-files.outputs.matrix)}}
    steps:
      - uses: actions/checkout@v3
      - run: |
          echo step input: "${{ matrix.value }}"
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            ghcr.io/${{ github.repository }}
          tags: |
            type=ref,event=branch
          flavor: |
            latest=true
            suffix=${{ matrix.value != '' && format('-{0}', matrix.value) || '' }},onlatest=true
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v3
        with:
          context: .
          file: ${{ matrix.value == '' && 'Dockerfile' || format('Dockerfile.{0}', matrix.value) }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  prebuild-modules:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.matrix.outputs.value }}
    steps:
      - uses: actions/checkout@v3
      - id: matrix
        run: |
          echo ::set-output name=value::$(ls **/Dockerfile 2>/dev/null | grep -v '^Dockerfile$' | sed -r 's/\/Dockerfile//g' | jq -R -s -c 'split("\n")[:-1]')

  build-module:
    needs: prebuild-modules
    if: needs.prebuild-modules.outputs.matrix != '[]'
    runs-on: ubuntu-latest
    strategy:
      matrix:
        value: ${{fromJson(needs.prebuild-modules.outputs.matrix)}}
    steps:
      - uses: actions/checkout@v3
      - run: |
          echo step input: "${{ matrix.value }}"
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            ghcr.io/${{ github.repository }}
          tags: |
            type=ref,event=branch
          flavor: |
            latest=true
            prefix=${{ matrix.value != '' && format('{0}-', matrix.value) || '' }},onlatest=true
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v3
        with:
          context: ${{ format('./{0}/', matrix.value) }}
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}