Don’t run in forks

name: CI

# Don't run in forked repositories

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Check if running in a fork
        run: |
          if [ "${{ github.repository_owner }}" != "Code-Maven" ]; then
            echo "Running in a forked repository"
          else
            echo "Running in the original repository"
          fi

          # Convert to lower-case
          OWNER=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
          if [ "$OWNER" != "code-maven" ]; then
            echo "Running in a forked repository"
          else
            echo "Running in the original repository"
          fi

      - name: Run only in the "real" repository
        if: ${{ github.repository_owner == 'Code-Maven' }}
        run: |
          echo "Running in the original repository"

      - name: Run only in a forked repository
        if: ${{ github.repository_owner != 'Code-Maven' }}
        run: |
          echo "Running in a forked repository owned by ${{ github.repository_owner }}"

  deploy:
    if: ${{ github.repository_owner == 'Code-Maven' }}
    runs-on: ubuntu-latest
    steps:
      - name: Run only in the "real" repository
        run: |
          echo "Running in the original repository"

• Check the owner - don’t run in forks.