dockerimage.yml

name: Docker Image CI

on: 
  push:
    branches:    
      - master
    tags:
      - release.*
env:
  GIT_SHA: ${{ github.sha }}
  REG_HOST: ${{ secrets.DOCKER_REGISTRY_HOST }}
  REG_PATH: ${{ secrets.DOCKER_REGISTRY_PATH }}
  REG_USER: ${{ secrets.DOCKER_USERNAME }}
  REG_PASS: ${{ secrets.DOCKER_PASSWORD }}
  #REG_HOST: ghcr.io  
  #REG_PATH: ${{ github.repository }}
  #REG_USER: ${{ github.actor }}
  #REG_PASS: ${{ secrets.GITHUB_TOKEN }}

jobs:
  needs-ghcr:
    runs-on: ubuntu-latest
    outputs:
      also_ghcr: ${{ steps.check.outputs.also_ghcr }}
    steps:
    - id: check
      env:
          MY_KEY: ${{ secrets.ALSO_GHCR }}
      if: "${{ env.MY_KEY != '' }}"
      run: echo "also_ghcr=true" >> $GITHUB_OUTPUT
     
  modified-folders: 
    runs-on: ubuntu-latest
    env:
      OUTFILE: folders.txt
      
    outputs:
      need_updates: ${{ steps.check_need_updates.outputs.need_updates }}
    
    steps:
    - uses: actions/checkout@v1
    - name: create file list
      run: python .github/modified-images.py
    - name: Calculate number of folders
      id: check_need_updates
      run: |
          [ -s "$OUTFILE" ] && echo "need_updates=1">>$GITHUB_OUTPUT || echo "need_updates=0">>$GITHUB_OUTPUT
    - name: Upload folder list
      uses: actions/upload-artifact@v1
      with:
        name: folder-list
        path: folders.txt
        
  modified-folders-ghcr:   
    runs-on: ubuntu-latest
    needs: [needs-ghcr, modified-folders]
    env:
      OUTFILE: folders1.txt
      REG_HOST: ghcr.io  
      REG_PATH: ${{ github.repository }}
      REG_USER: ${{ github.actor }}
      REG_PASS: ${{ secrets.GITHUB_TOKEN }}
    if: needs.needs-ghcr.outputs.also_ghcr == 'true'
      
    #outputs:
    #  need_updates: ${{ steps.check_need_updates.outputs.need_updates }}
    
    steps:
    - uses: actions/checkout@v1
    - uses: actions/download-artifact@v1
      with:
        name: folder-list
    - name: create file list
      run: python .github/modified-images.py
    #- name: Calculate number of folders
    #  id: check_need_updates
    #  run: |
    #      [ -s "$OUTFILE" ] && echo "::set-output name=need_updates::1" || echo "::set-output name=need_updates::0"
    - name: merge folder lists
      run: |
          cat folder-list/folders.txt folders1.txt > folders.txt
    - name: upload folder list
      uses: actions/upload-artifact@v1
      with:
        name: folder-list
        path: folders.txt

  build:

    runs-on: ubuntu-latest
    needs: [ "modified-folders", "modified-folders-ghcr", "needs-ghcr"]
    
    #if: needs.modified-folders.outputs.need_updates==1

    steps:
    - uses: actions/checkout@v1
    - uses: actions/download-artifact@v1
      with:
        name: folder-list

    - name: Login to GitHub Docker Registry
      if: needs.needs-ghcr.outputs.also_ghcr == 'true'
      uses: docker/login-action@v1
      with:
          registry: "ghcr.io"
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

    - name: Log in to registry
      uses: docker/login-action@v1
      with:
          registry: ${{ env.REG_HOST }}
          username: ${{ env.REG_USER }}
          password: ${{ env.REG_PASS }}

    - name: Build the images
      run: |
        echo '===================================================='
        echo "Will build these directories:"
        cat folder-list/folders.txt
        echo '===================================================='
        while read f TAG VER; do 
          echo Folder $f, will be tagged as $TAG:$VER
          if docker build $f/ --tag $TAG:$VER --tag $TAG:latest ; then
            docker history $TAG:$VER
            docker push $TAG:$VER
            docker push $TAG:latest
          else
            echo "BUILD FAILED"
            echo $f $TAG $VER >> errors.txt
          fi
          echo '===================================================='
        done < folder-list/folders.txt
    - run: |
        [ -e "errors.txt" ] && (echo "ERRORS!" && cat errors.txt) || true