update-md-date.yml

name: Update Last Modified Date

on:
  pull_request:
    branches:
      - main

permissions:
  contents: write
  pull-requests: write

jobs:
  update-date:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.pull_request.head.ref }}

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.x'

      - name: Install dependencies
        run: pip install python-dateutil

      - name: Configure Git 
        run: |
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git config --global user.name "github-actions[bot]"

      - name: Update last modified date in Markdown files
        run: python .github/workflows/update_date.py

      - name: Pull (merge) remote changes, commit, and push if needed
        env:
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BRANCH="${{ github.event.pull_request.head.ref }}"
          git pull origin "$BRANCH" || echo "No merge needed"
          git add -A
          git commit -m "Update last modified date in Markdown files" || echo "No changes to commit"
          git remote set-url origin https://x-access-token:${TOKEN}@github.com/${{ github.repository }}
          git push origin HEAD:"$BRANCH"