apache/datafusion-comet
Grade a repo

89

/ 100

GradeB

Well engineered. The main gaps are CI and a contributing guide.

Top 16% of 5,156 graded repos

Apache DataFusion Comet Spark Accelerator

Documentation85
Engineering85
Health100
Scala1,281Apache-2.0today

Top fixes

Highest-impact changes first, ranked by point weight

12 to address
  1. 1
    Tests18pt

    Wire your tests to a documented command (e.g. a test script in your build config) so the suite is reproducible.

  2. 2
    CI/CD14pt

    Add a step like `run: npm test`, `run: pytest`, or `run: tox` to your workflow file.

  3. 3
    CI/CD14pt

    Upload coverage to Codecov, Coveralls, or report it with `--coverage` flags.

  4. 4
    README12pt

    Add CI/build status badges from shields.io or your CI provider to signal project health.

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Scorecard

Every check, grouped by category and sorted worst-first

Documentation

85

Contributing guide5pt47

CONTRIBUTING guide is very brief (−12 pts for depth). 150+ words earns +6 pts; 400+ earns +12 pts.

→ Add setup instructions, code style notes, and how to run tests.

README12pt90

README is present.

Install and run instructions9pt90

README documents how to install the project.

License6pt100

Licensed under Apache-2.0.

Engineering

85

CI/CD14pt72

CI is configured (.github/workflows/ci.yml).

Tests18pt80

Test files detected (dev/ci/pr-type-label.test.mjs).

Linting and formatting5pt100

Linter or formatter configured (native/rustfmt.toml).

Reproducibility6pt100

Lockfile present (contrib/delta/native/Cargo.lock). Installs are reproducible.

Issue and PR templates6pt100

Issue or PR templates present.

Project health

100

Dependency manifest6pt100

Dependency manifest found (pom.xml).

Repository metadata5pt100

Repository has a description.

Activity5pt100

Actively maintained (pushed within the last month).

Housekeeping3pt100

.gitignore present.

Repository health signals

Activity, community, and responsiveness at scan time

Activity

  • -
    Commits (30d / 90d)
  • 379
    Forks
  • 22
    Releaseslatest 1y ago

Community

  • 100% - Good
    Community health
  • 3 bus factor
    authors own >50% of commits
  • 1,281
    Watchers

Responsiveness

  • 5h
    Median issue response
  • 13h
    Median PR merge time
  • 769
    Open issues
Repository files33 root entries
  • .ai
  • .claude
  • .github
    Good: CI is configured (.github/workflows/ci.yml).
    Good: Dependabot covers 2 ecosystems (cargo, github-actions). Dependencies stay current.
    Good: Issue or PR templates present.
  • .mvn
  • benchmarks
    Good: Environment pinned via benchmarks/Dockerfile.
  • common
  • conf
  • contrib
    Good: Lockfile present (contrib/delta/native/Cargo.lock). Installs are reproducible.
  • dev
    Good: Test files detected (dev/ci/pr-type-label.test.mjs).
  • docs
  • kube
  • native
    Good: Linter or formatter configured (native/rustfmt.toml).
  • spark
  • spark-integration
  • .asf.yaml
  • .dockerignore
  • .gitignore
    Good: .gitignore present.
  • .prettierignore
  • .scalafix-syntactic.conf
  • .scalafix.conf
  • AGENTS.md
  • CHANGELOG.md
  • CLAUDE.md
  • CONTRIBUTING.md
    Issue: CONTRIBUTING guide is very brief (−12 pts for depth). 150+ words earns +6 pts; 400+ earns +12 pts.Fix: Add setup instructions, code style notes, and how to run tests.
    Issue: Contributing guide lacks a setup section (−12 pts).Fix: Show new contributors how to get a local dev environment running.
    Issue: Contributing guide lacks a code style section (−8 pts).Fix: Describe your linting/formatting rules and how to run them.
    Issue: Contributing guide lacks a testing section (−8 pts).Fix: Show contributors how to run the test suite (e.g. npm test, pytest, cargo test).
    Issue: Contributing guide lacks a PR workflow section (−8 pts).Fix: Explain how to fork, branch, and open a pull request so contributors know what to expect.
    Issue: Contributing guide has no code examples (−5 pts).Fix: Add code blocks showing example commands for setup, running tests, and submitting a PR.
  • LICENSE.txt
    Good: Licensed under Apache-2.0.
  • Makefile
  • mvnw
  • mvnw.cmd
  • NOTICE.txt
  • pom.xml
    Good: Dependency manifest found (pom.xml).
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Good: README has code examples.
    Good: README links to a live demo or deployed app.
    Issue: No status badges in the README (−10 pts).Fix: Add CI/build status badges from shields.io or your CI provider to signal project health.
    Good: README documents how to install the project.
    Good: README documents how to run the project.
  • rust-toolchain.toml
  • scalafmt.conf
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