build-images.yml

name: Build Images

on:
  pull_request:
    branches:
      - master
    types: [opened, synchronize]
  workflow_dispatch:

jobs:
  setup_build:
    runs-on: ubuntu-latest
    outputs:
      backend_changed: ${{ steps.changed_files.outputs.backend == 'true' || github.event_name == 'workflow_dispatch' }}
      frontend_changed: ${{ steps.changed_files.outputs.frontend == 'true' || github.event_name == 'workflow_dispatch' }}
      repo_lc: ${{ steps.lowercase_repo.outputs.REPO_LC }}

    steps:
      - name: Checkout repo
        uses: actions/checkout@v5

      - name: Get changes
        uses: tj-actions/changed-files@v45
        id: changed_files
        with:
          files_yaml: |
            backend:
              - 'backend/**'
              - '!backend/**/*.md'
            frontend:
              - 'frontend/**'
              - '!frontend/**/*.md'
          base_sha: ${{ github.event.pull_request.base.sha || github.sha }}

      - name: Set lowercase repository variable
        id: lowercase_repo
        env:
          REPOSITORY: ${{ github.repository }}
        run: |
          REPO_LC=$(echo "$REPOSITORY" | tr '[:upper:]' '[:lower:]')
          echo "REPO_LC=$REPO_LC" >> $GITHUB_OUTPUT

  build-backend:
    needs: setup_build
    if: ${{ needs.setup_build.outputs.backend_changed == 'true' }}
    uses: ./.github/workflows/docker-build.yml
    with:
      image_name: backend
      context: backend
      additional_tags: ghcr.io/${{ needs.setup_build.outputs.repo_lc }}-backend-preview:${{ github.event.pull_request.number || github.ref_name }}

  build-frontend:
    needs: setup_build
    if: ${{ needs.setup_build.outputs.frontend_changed == 'true' }}
    uses: ./.github/workflows/docker-build.yml
    with:
      image_name: frontend
      context: frontend
      additional_tags: ghcr.io/${{ needs.setup_build.outputs.repo_lc }}-frontend-preview:${{ github.event.pull_request.number || github.ref_name }}