Analytics for GitHub Actions

name: Traffic Impact Report
on:
  deployment_status:

jobs:
  report:
    if: github.event.deployment_status.state == 'success'
    runs-on: ubuntu-latest
    env:
      # Passed to the CLI with --site. There is no site environment variable.
      SITE_DOMAIN: your-domain.com
    steps:
      - uses: actions/checkout@v4

      - name: Install BetterMeter CLI
        run: npm install -g bettermeter

      - name: Generate traffic report
        env:
          # Both are required together, or every command exits with
          # "BETTERMETER_API_KEY and BETTERMETER_URL must be set together."
          BETTERMETER_API_KEY: ${{ secrets.BETTERMETER_API_KEY }}
          BETTERMETER_URL: https://bettermeter.com
        run: |
          bettermeter stats --site "$SITE_DOMAIN" --range today --json > stats.json

      - name: Comment on PR
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const s = JSON.parse(fs.readFileSync('stats.json', 'utf8'));
            const pct = (n) => (n >= 0 ? '+' : '') + n + '%';
            const delta = s.hasPreviousPeriodData
              ? 'Visitors ' + pct(s.visitorsChange) + ', pageviews ' + pct(s.pageviewsChange) + ' vs. the previous day.'
              : 'No previous-day data to compare against yet.';
            const body = '## 📊 Traffic Impact Report\n\n'
              + '**' + s.visitors + '** visitors, **' + s.pageviews + '** pageviews, '
              + '**' + s.sessions + '** sessions today.\n\n' + delta;
            const { data: prs } = await github.rest.repos.listPullRequestsAssociatedWithCommit({
              owner: context.repo.owner,
              repo: context.repo.repo,
              commit_sha: context.sha,
            });
            if (prs.length > 0) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prs[0].number,
                body,
              });
            }