project-labelling.yml

name: Project labelling

on:
  project_card:
    types: [created, moved, deleted]

jobs:
  process-project:
    name: Add/remove the project label and set the matrix variable
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.setMatrixData.outputs.matrix }}
      statusLabel: ${{ steps.setStatusLabel.outputs.statusLabel }}
    steps:
      - name: Fetch project data
        run: |
          echo 'PROJECT_DATA<<EOF' >> $GITHUB_ENV
          curl --request GET --url '${{ github.event.project_card.project_url }}' --header 'Authorization: token ${{ secrets.GITHUB_TOKEN }}' >> $GITHUB_ENV
          echo 'EOF' >> $GITHUB_ENV

      ### Add or remove the project label ###
      - name: Add the project label
        uses: andymckay/labeler@master
        if: ${{ contains(github.event.action, 'created') || contains(github.event.action, 'moved') }}
        with:
          add-labels: "Project: ${{ fromJSON(env.PROJECT_DATA).name }}"

      - name: Remove the project label
        uses: andymckay/labeler@master
        if: ${{ contains(github.event.action, 'deleted') }}
        with:
          remove-labels: "Project: ${{ fromJSON(env.PROJECT_DATA).name }}"

      ### Fetch project columns ###
      - name: Fetch all columns
        run: |
          echo 'ALL_COLUMNS_DATA<<EOF' >> $GITHUB_ENV
          curl --request GET --url '${{ fromJSON(env.PROJECT_DATA).columns_url }}' --header 'Authorization: token ${{ secrets.GITHUB_TOKEN }}' | jq --compact-output '["Status: " + .[].name]' >> $GITHUB_ENV
          echo 'EOF' >> $GITHUB_ENV

      - name: Fetch column info
        run: |
          echo 'COLUMN_DATA<<EOF' >> $GITHUB_ENV
          curl --request GET --url '${{ github.event.project_card.column_url }}' --header 'Authorization: token ${{ secrets.GITHUB_TOKEN }}' >> $GITHUB_ENV
          echo 'EOF' >> $GITHUB_ENV

      - uses: actions/github-script@v6
        id: setMatrixData
        with:
          result-encoding: string
          script: |
            const columnData = JSON.parse(process.env.COLUMN_DATA)
            const allColumnsData = JSON.parse(process.env.ALL_COLUMNS_DATA)

            const matrix = allColumnsData.filter((label) => {
              return label !== `Status: ${columnData.name}`
            });

            core.setOutput('matrix', matrix)

      - name: Set the status label
        id: setStatusLabel
        run: |
          echo "statusLabel=${{ fromJSON(env.COLUMN_DATA).name }}" >> $GITHUB_OUTPUT

  remove-labels:
    runs-on: ubuntu-latest
    needs: process-project
    if: ${{ contains(github.event.action, 'deleted') || contains(github.event.action, 'moved') }}
    strategy:
      matrix:
        label: ${{fromJson(needs.process-project.outputs.matrix)}}
    steps:
      - name: Remove the status label
        uses: andymckay/labeler@master
        with:
          remove-labels: ${{ matrix.label }}

  add-labels:
    runs-on: ubuntu-latest
    needs: 
      - process-project
      - remove-labels
    if: ${{ contains(github.event.action, 'created') || contains(github.event.action, 'moved') }}
    steps:
      - name: Add the status label
        uses: andymckay/labeler@master
        with:
          add-labels: "Status: ${{ needs.process-project.outputs.statusLabel }}"