require-label.yaml

name: require-label

on:
  workflow_call:
    inputs:
      label:
        required: true
        type: string
    outputs:
      result:
        value: ${{ jobs.require-label.outputs.result }}
        description: Returns 'true' if the label is present, empty otherwise (cannot return 'false')

jobs:
  require-label:
    runs-on: ubuntu-latest
    outputs:
      result: ${{ steps.check-for-label.outputs.result }}
    steps:
      - name: Check if label is present
        id: check-for-label
        if: contains(github.event.pull_request.labels.*.name, inputs.label)
        run: |
          echo "result=true" >> $GITHUB_OUTPUT
          echo "::notice::✅ The label is present: '${{ inputs.label }}'"
        shell: bash

      - name: Fail if label is not present
        if: steps.check-for-label.outputs.result != 'true'
        run: |
          echo "::error::❌ The label is missing: '${{ inputs.label }}'"
          echo "## 🚨 Missing Required Label" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "💡 Please add the following label to the pull request to proceed:" >> $GITHUB_STEP_SUMMARY
          echo "▶️ **${{ inputs.label }}**" >> $GITHUB_STEP_SUMMARY
          exit 1
        shell: bash