verify_conflicts.yml

name: Check for conflicts

on:
  pull_request:
    branches:
      - main

jobs:
  check-conflicts:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Check for conflicts
        id: check
        run: |
          git fetch origin
          git merge-base --is-ancestor HEAD FETCH_HEAD || echo "conflict=true" >> $GITHUB_ENV

      - name: Add conflict tag
        if: env.conflict == 'true'
        uses: actions/github-script@v4
        with:
          script: |
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: 'This pull request has conflicts. Please resolve them before merging.'
            });
            github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              labels: ['conflict']
            });
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}