codegraph-impact.yml

name: Codegraph Impact Analysis
on: [pull_request]
jobs:
  impact:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
      - uses: actions/setup-node@v6
        with:
          node-version: '22'
      - name: Install dependencies
        shell: bash
        run: |
          for attempt in 1 2 3; do
            npm install && break
            if [ "$attempt" -lt 3 ]; then
              echo "::warning::npm install attempt $attempt failed, retrying in 15s..."
              sleep 15
            else
              echo "::error::npm install failed after 3 attempts"
              exit 1
            fi
          done
      - uses: actions/cache@v5
        with:
          path: .codegraph/
          key: codegraph-${{ hashFiles('src/**', 'package.json') }}
          restore-keys: codegraph-
      - run: npx codegraph build
      - name: Run impact analysis
        run: |
          npx codegraph diff-impact --ref origin/${{ github.base_ref }} --json -T > impact.json || echo '{"affectedFiles":[],"summary":null}' > impact.json
      - name: Comment on PR
        uses: actions/github-script@v8
        with:
          script: |
            const fs = require('fs');
            const impact = JSON.parse(fs.readFileSync('impact.json', 'utf-8'));
            if (!impact.summary) {
              console.log('No impact data to report.');
              return;
            }
            const body = `## Codegraph Impact Analysis\n\n` +
              `**${impact.summary.functionsChanged} functions changed** -> ` +
              `**${impact.summary.callersAffected} callers affected** across ` +
              `**${impact.summary.filesAffected} files**.\n\n` +
              (impact.affectedFunctions || []).slice(0, 20).map(f =>
                `- \`${f.name}\` in \`${f.file}:${f.line}\` (${f.transitiveCallers} transitive callers)`
              ).join('\n');
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body
            });