I am trying to configure a GitHub Actions workflow to conditionally build and push Docker images based on changes in specific directories. I only want to build the images associated with the changed paths and skip the others. Here’s a simplified version of my workflow. I want to build all images when there is a change in the library, and build only the relevant image based on the file changes. For example, build the collector image only if there is a change in the collector.

The matrix includes a job Build and push Docker Images (false) for instance when there is a change library (needs.changes.outputs.library == ‘true’)

How can I properly configure the matrix so that it only includes images for which their corresponding path has changed, based on the output from the changes job?

jobs:
  changes:
    name: Detect changes
    runs-on: ubuntu-latest
    outputs:
      library: ${{ steps.filter.outputs.library }}
      workers: ${{ steps.filter.outputs.workers }}
      collector: ${{ steps.filter.outputs.collector }}
      api: ${{ steps.filter.outputs.api }}
      webhook: ${{ steps.filter.outputs.webhook }}
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Filter paths
        uses: dorny/paths-filter@v2
        id: filter
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          filters: |
            library:
              - 'package.json'
              - 'package-lock.json'
              - 'shared/**'
            workers:
              - 'workers/**'
              - 'prisma/**'
            collector:
              - 'collector/**'
            api:
              - 'api/**'
            webhook:
              - 'webhook/**'

  docker:
    name: Build and push Docker Images
    runs-on: ubuntu-latest
    needs: changes
    strategy:
      matrix:
        image:
          - collector
          - workers
          - api
          - webhook
    include:
      - image: ${{ needs.changes.outputs.collector == 'true' || needs.changes.outputs.library == 'true' && 'collector' }}
      - image: ${{ needs.changes.outputs.workers == 'true' || needs.changes.outputs.library == 'true' && 'workers' }}
      - image: ${{ needs.changes.outputs.api == 'true' || needs.changes.outputs.library == 'true' && 'api' }}
      - image: ${{ needs.changes.outputs.collector == 'true' || needs.changes.outputs.webhook == 'true' && 'webhook' }}
    exclude:
      - image: ${{ needs.changes.outputs.collector == 'false' || needs.changes.outputs.library == 'false' && 'collector' }}
      - image: ${{ needs.changes.outputs.workers == 'false' || needs.changes.outputs.library == 'false' && 'workers' }}
      - image: ${{ needs.changes.outputs.api == 'false' || needs.changes.outputs.library == 'false' && 'api' }}
      - image: ${{ needs.changes.outputs.collector == 'false' || needs.changes.outputs.webhook == 'false' && 'webhook' }}
    steps:
      - name: Build and push
        run: |
          echo "Building and pushing Docker image ${{ matrix.image }}"