build-team-image.yaml

name: Build changed team image
on:
  pull_request:
    branches:
      - main
  push:
    branches:
      - main

jobs:
  find-team-changes:
    runs-on: ubuntu-latest
    outputs:
      modifiedTeams: ${{ steps.filter.outputs.changes }}
    steps:

    - name: ↩️ Checkout
      uses: actions/checkout@v3

    - name: 📂 Detect changed team folder
      uses: dorny/paths-filter@v2
      id: filter
      with:
        filters: |
          brown_independents:
            - 'Teams/brown_independents/**'
          ginger_mariners:
            - 'Teams/ginger_mariners/**'
          green_twins:
            - 'Teams/green_twins/**'
          pink_hotspurs:
            - 'Teams/pink_hotspurs/**'
          purple_saints:
            - 'Teams/purple_saints/**'
          red_titans:
            - 'Teams/red_titans/**'
          white_dodgers:
            - 'Teams/white_dodgers/**'
          yellow_pirates:
            - 'Teams/yellow_pirates/**'

  build-team-image:
    name: Build team docker image
    if: ${{ needs.find-team-changes.outputs.modifiedTeams != '[]' }}
    runs-on: ubuntu-latest
    needs: find-team-changes
    strategy:
      fail-fast: false
      matrix:
        team: ${{ fromJSON(needs.find-team-changes.outputs.modifiedTeams) }}
    steps:

      - name: ↩️ Checkout
        uses: actions/checkout@v2

      - name: 🏗️ Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: ℹ️ Docker meta
        id: docker_meta
        uses: docker/metadata-action@v4
        with:
          images: ghcr.io/hacktoberfestmunich/hacktoberfest-2023
          tags: type=raw,value=${{ matrix.team }}

      - name: 🔑 ghcr Login
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 💿 Build Image
        if: ${{ github.event_name != 'push' }}
        uses: docker/build-push-action@v4
        with:
          context: "Teams/${{ matrix.team }}"
          push: false
          file: Teams/${{ matrix.team }}/Dockerfile
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}

      - name: 🚀 Build and push Image
        if: ${{ github.event_name == 'push' }}
        uses: docker/build-push-action@v4
        with:
          context: "Teams/${{ matrix.team }}"
          push: true
          file: Teams/${{ matrix.team }}/Dockerfile
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}

  cleanup-images:
    name: Cleanup untagged images from ghcr
    if: ${{ github.event_name == 'push' }}
    runs-on: ubuntu-latest
    needs: find-team-changes
    steps:

      - name: 🗑️ Cleanup old untagged images
        uses: dylanratcliffe/delete-untagged-containers@v1.2.3
        with:
          org: ${{ github.repository_owner }}
          token: ${{ secrets.HACKTOBERFEST2023_PAT }}
          package_name: 'hacktoberfest-2023'