demo.yaml

      - name: changesets
        id: changed-files
        uses: tj-actions/changed-files@v34
        with:
          separator: ","
          dir_names: true
          dir_names_max_depth: 2
          files: |
            apps/**

      - id: set-matrix
        run: |
          echo "${{ steps.changed-files.outputs.all_changed_and_modified_files }}"
          apps=$(jq -n -c --arg inarr "${{ steps.changed-files.outputs.all_changed_and_modified_files }}" '{ app: $inarr | split(",") }')
          cat << EOF >> $GITHUB_OUTPUT
          matrix=$apps
          EOF