coverage-pages.yml

# GitHub Actions Workflow: Coverage Reports for Pull Requests
#
# This workflow runs tests with coverage on PRs and comments the results.
# Actual deployment to GitHub Pages is handled by docs.yml workflow.
#
# Coverage reports on the live site:
# https://gitlab-mcp.sw.foundation/coverage/

name: Coverage Report

on:
  pull_request:
    branches:
      - main
    paths:
      - "src/**"
      - "package.json"
      - "yarn.lock"
      - "tsconfig.json"
      - "jest.config.*"

concurrency:
  group: coverage-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read
  pull-requests: write
  issues: write

jobs:
  coverage:
    name: Generate Coverage Report
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Set up Node.js
        uses: actions/setup-node@v6
        with:
          node-version: 24

      - name: Enable Corepack
        run: corepack enable

      - name: Install dependencies
        run: yarn install --immutable

      - name: Run tests with coverage
        run: yarn test:cov
        working-directory: packages/gitlab-mcp

      - name: Extract coverage percentage
        id: coverage
        run: |
          COVERAGE=$(cat packages/gitlab-mcp/coverage/lcov-report/index.html | grep -o 'class="strong">[0-9.]*%' | head -1 | grep -o '[0-9.]*')
          echo "percentage=${COVERAGE:-0}" >> $GITHUB_OUTPUT

      - name: Comment coverage on PR
        continue-on-error: true
        uses: actions/github-script@v9
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs');
            let summary;

            try {
              const json = JSON.parse(fs.readFileSync('packages/gitlab-mcp/coverage/coverage-summary.json', 'utf8'));
              const t = json.total;
              summary = [
                '## Test Coverage Report',
                '',
                `**Overall Coverage:** ${t.lines.pct}%`,
                '',
                '| Metric | Percentage |',
                '|--------|------------|',
                `| Statements | ${t.statements.pct}% |`,
                `| Branches | ${t.branches.pct}% |`,
                `| Functions | ${t.functions.pct}% |`,
                `| Lines | ${t.lines.pct}% |`,
                '',
                '[View detailed coverage report](https://gitlab-mcp.sw.foundation/coverage/)',
              ].join('\n');
            } catch {
              summary = `## Test Coverage Report\n\n**Coverage:** ${{ steps.coverage.outputs.percentage }}%`;
            }

            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            });

            const existing = comments.data.find(c => c.body.includes('## Test Coverage Report'));

            if (existing) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: existing.id,
                body: summary
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: summary
              });
            }

      - name: Upload coverage artifacts
        uses: actions/upload-artifact@v7
        with:
          name: coverage-reports-${{ github.sha }}
          path: packages/gitlab-mcp/coverage/
          retention-days: 14