name: shared matrix
on:
  push:
  workflow_dispatch:

jobs:
  define-matrix:
    runs-on: nix

    outputs:
      colors: ${{ steps.colors.outputs.colors }}

    steps:
      - name: Define Colors
        id: colors
        run: |
          echo 'colors=["red", "green", "blue"]' >> "$FORGEJO_OUTPUT"

  produce-artifacts:
    runs-on: nix
    needs: define-matrix
    strategy:
      matrix:
        color: ${{ fromJSON(needs.define-matrix.outputs.colors) }}

    steps:
      - name: Define Color
        env:
          color: ${{ matrix.color }}
        run: |
          echo "$color" > color
      - name: Produce Artifact
        uses: forgejo/upload-artifact@v4
        with:
          name: ${{ matrix.color }}
          path: color

  consume-artifacts:
    runs-on: nix
    needs:
    - define-matrix
    - produce-artifacts
    strategy:
      matrix:
        color: ${{ fromJSON(needs.define-matrix.outputs.colors) }}

    steps:
    - name: Retrieve Artifact
      uses: forgejo/download-artifact@v5
      with:
        name: ${{ matrix.color }}

    - name: Report Color
      run: |
        cat color