update-readme.yml

name: Update README and Create PR

on:
  push:
    branches:
      - master
  pull_request:
    types: [closed]
    branches:
      - master

jobs:
  update-readme:
    # ジョブを実行する条件:
    # 1. master ブランチへの直接プッシュ
    # 2. master ブランチにマージされたプルリクエストのクローズ
    if: |
      (github.event_name == 'push' && github.ref == 'refs/heads/master') ||
      (github.event_name == 'pull_request' && github.event.pull_request.merged == true)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: master

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Run makeindex.py
        run: python3 .github/workflows/makeindex.py

      - name: Check for changes
        id: check_changes
        run: |
          if git diff --quiet; then
            echo "No changes detected"
            echo "changes_detected=false" >> $GITHUB_OUTPUT
          else
            echo "Changes detected"
            echo "changes_detected=true" >> $GITHUB_OUTPUT
          fi

      - name: Commit README.md updates
        if: steps.check_changes.outputs.changes_detected == 'true'
        run: |
          git config --global user.email "action@github.com"
          git config --global user.name "GitHub Action"
          git checkout -b update-readme-${{ github.run_number }}
          git add WAIC-TEST/HTML/README.md
          git commit -m "Update README.md automatically"
          git push origin update-readme-${{ github.run_number }}

      - name: Create Pull Request
        if: steps.check_changes.outputs.changes_detected == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          branch: update-readme-${{ github.run_number }}
          commit-message: "Update README.md automatically"
          title: "Automatically update README.md"
          body: "This is an auto-generated PR to update README.md file"
          base: master