auto-respond-pr.yml

name: Auto Respond to PR

on:
    pull_request:
      types: [opened, synchronize, closed, ready_for_review]

jobs:
  auto_respond:
    if: github.actor != 'dependabot[bot]'
    runs-on: ubuntu-latest

    steps:
      - name: Checkout base branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.base.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
          path: base

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

      - name: Run build script on base branch
        run: |
          cd base
          npm install
          npm run build
          cd ..

      - name: Run build script on PR branch
        run: |
          cd pr
          git config --global user.email "dax@duck.com"
          git config --global user.name "dax"
          echo ${{ github.event.pull_request.base.ref }}
          git fetch origin ${{ github.event.pull_request.base.ref }}
          git rebase origin/${{ github.event.pull_request.base.ref }}
          npm install
          npm run build
          cd ..

      - name: Create diff of file outputs
        run: |
          node pr/.github/scripts/diff-directories.js base pr > diff.txt

      - name: Find Previous Comment
        uses: peter-evans/find-comment@v3
        id: find_comment
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: 'Generated file diff'
          direction: last

      - name: Create Comment Body
        uses: actions/github-script@v7
        id: create_body
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            const prNumber = context.issue.number;
            const diffOut = fs.readFileSync('diff.txt', 'utf8');
            const commentBody = `
            ### *[Beta]* Generated file diff
            *Time updated:* ${new Date().toUTCString()}

            ${diffOut}
                `;
            core.setOutput('comment_body', commentBody);
            core.setOutput('pr_number', prNumber);

      - name: Create, or Update the Comment
        uses: peter-evans/create-or-update-comment@v4
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-id: ${{ steps.find_comment.outputs.comment-id }}
          body: ${{ steps.create_body.outputs.comment_body }}
          edit-mode: replace