TaskBounty Coverage Gate

A zero-dependency coverage gate for JavaScript and TypeScript projects. It reads the coverage report your test run already produced (LCOV or Istanbul json-summary), prints your current line coverage, the gap to a target (default 80%), and your lowest-covered files, and fails CI when you are below target.

No network calls, no account, no dependencies. It works with jest, vitest, nyc, and c8, anything that can emit lcov.info or coverage-summary.json.

Install

npm install -g taskbounty-coverage-gate

Or run it without installing via npx (shown below).

CLI

# after running your tests with coverage
npx taskbounty-coverage-gate --min 80

It auto-detects coverage/lcov.info, coverage/coverage-summary.json, coverage-summary.json, or lcov.info. Point it explicitly with --report:

npx taskbounty-coverage-gate --report coverage/lcov.info --min 80

Options:

| Flag | Default | Meaning | | --- | --- | --- | | --report <path> | auto | Path to the LCOV or json-summary report | | --min <pct> | 80 | Target line coverage | | --top <n> | 5 | How many lowest-covered files to list | | --no-fail | off | Report only, always exit 0 |

Example output:

  Coverage gate  (report: coverage/lcov.info)

  Line coverage   62.4%  ███████████████░░░░░░░░░
  Target          80.0%
  Result          BELOW target by 17.6 points

  Lowest-covered files:
     0%  src/api/webhooks.ts
    31%  src/billing/invoices.ts
    44%  src/auth/session.ts

Exit code is 1 when below target (so it gates CI), 0 otherwise or with --no-fail.

GitHub Action

- name: Test with coverage
  run: npm test -- --coverage

- name: Coverage gate
  uses: task-bounty/coverage-gate@v1
  with:
    report: coverage/lcov.info
    min: 80
    # fail-under: false   # report only, do not fail the job

Supported report formats

• LCOV (lcov.info): line coverage summed from LF/LH per file.
• Istanbul json-summary (coverage-summary.json): repo total plus per-file line percentages.

Reaching the target

Below 80% and want to get there without the grind? TaskBounty takes a repo to 80% line coverage and delivers it as a sandbox-verified pull request, refunded if it misses. Free coverage check for any repo: https://www.task-bounty.com/coverage-check

License

MIT