add-netlify-link.yml

name: Add Netlify Link to PR

on:
  pull_request_target:
    paths:
      - 'sites/**/src/pages/**'
      - 'sites/**/src/content/**'

jobs:
  add-comment:
    runs-on: ubuntu-latest
    steps:
      - name: Check for changed files
        id: changed-files
        uses: tj-actions/changed-files@c3a1bb2c992d77180ae65be6ae6c166cf40f857c # v45

      - name: Add Netlify link to PR
        if: steps.changed-files.outputs.all_changed_files != ''
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.NF_CORE_BOT_AUTH_TOKEN }}
          script: |
            let changedFiles = `${{ steps.changed-files.outputs.all_changed_files }}`.split(' ').slice(0, 50);
            console.log('Changed files:', changedFiles)

            // remove the sites/** prefix until src
            const processedFiles = changedFiles.map(file => file.replace(/^sites\/[^/]+\//, ''));
            console.log('Processed files:', processedFiles);

            // handle normal pages
            let netlifyLinks = processedFiles
              .filter(file => file.startsWith('src/pages/'))
              .filter(file => !file.endsWith('].astro')) // skip dynamic routes
              .map(file => `@netlify ${file?.replace('src/pages/', '/')}`)[0]
              ?.replace(/\.md$/, '')
              .replace(/\.mdx$/, '')
              .replace(/\.astro$/, '')
              .replace(/\/index$/, '');

            // handle pages in content collections
            if (!netlifyLinks) {
              netlifyLinks = processedFiles
                .filter(file => file.startsWith('src/content/'))
                .map(file => `@netlify ${file?.replace('src/content/', '/')}`)[0]
                ?.replace(/\.md$/, '')
                .replace(/\.mdx$/, '')
                .replace(/\/index$/, '');
            }

            console.log('Netlify links:', netlifyLinks);

            if (netlifyLinks) {
              console.log('Adding Netlify link to PR body', context.payload.pull_request.number);

              const { data: pullRequest } = await github.rest.pulls.get({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: context.payload.pull_request.number,
              });

              console.log('Current PR:', pullRequest);
              console.log('Current PR body:', pullRequest.body);

              const currentBody = pullRequest.body || '';
              if (currentBody.includes('@netlify')) {
                return; // Skip if the PR body already contains a Netlify link
              }

              const newBody = `${currentBody}\n\n${netlifyLinks}`;
              console.log('New PR body:', newBody);

              // Update the pull request body
              await github.rest.pulls.update({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: pullRequest.number,
                body: newBody,
              });

              console.log('Netlify link added to PR body');
            }