name: Build mailcow Docker Images

on:
  push:
    branches: [ "master", "staging" ]
  workflow_dispatch:

permissions:
  contents: read # to fetch code (actions/checkout)

jobs:
  targets:
      name: Generate targets list from provided bake file
      runs-on: ubuntu-latest
      outputs:
        matrix: ${{ steps.targets.outputs.matrix }}
      steps:
      - name: Checkout
        uses: actions/checkout@v3
      
      - name: Prepair Image Builds
        run: |
          cp -v helper-scripts/docker-compose.override.yml.d/BUILD_FLAGS/docker-compose.override.yml docker-compose.preride.yml
          docker compose -f docker-compose.yml -f docker-compose.preride.yml config > docker-compose.override.yml
          rm -v docker-compose.yml && mv -v docker-compose.override.yml docker-compose.yml
        
      - name: Create matrix
        id: targets
        run: |
          docker buildx bake ${{ inputs.group }} -f ${{ inputs.file }} --print
          TARGETS=$(docker buildx bake ${{ inputs.group }} -f ${{ inputs.file }} --print | jq -cr ".group.${{ inputs.group }}.targets")
          echo "matrix=$TARGETS" >> $GITHUB_OUTPUT  
        
      - name: Show matrix
        run: |
          echo ${{ steps.targets.outputs.matrix }}
      
      
  build:
      name: Get targets list and build
      runs-on: ubuntu-latest
      needs:
      - targets
      
      strategy:
        fail-fast: true
        matrix:
          target: ${{ fromJson(needs.targets.outputs.matrix) }}

      steps:
      - name: Push Images using BuildX Bake
        uses: docker/bake-action@v2
        with:
          files: |
            ./${{ inputs.file }}
             ${{ steps.meta.outputs.bake-file }}
          targets: ${{ matrix.target }}
          push: false
          set: |
            *.cache-from=type=gha,scope=build-${{ matrix.target }}
            *.cache-to=type=gha,scope=build-${{ matrix.target }},mode=max
            *.platform=linux/amd64,linux/arm64