apache/datafusion
Grade a repo

89

/ 100

GradeA

A well-known project done right. Strong docs and solid engineering throughout.

Top 11% of 5,156 graded repos

Apache DataFusion SQL Query Engine

Documentation80
Engineering100
Health86
Rust8,929Apache-2.01mo ago

Top fixes

Highest-impact changes first, ranked by point weight

15 to address
  1. 1
    README12pt

    Show a quick-start snippet so contributors can see what using your project looks like.

  2. 2
    README12pt

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

  3. 3
    Install and run instructions9pt

    Add a .env.example listing all required environment variables so contributors know what to set up.

  4. 4
    Dependency manifest6pt

    Add a [project] table with name, version, and description so the package can be published and understood.

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Scorecard

Every check, grouped by category and sorted worst-first

Documentation

80

Contributing guide5pt52

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.

README12pt75

README is present.

Install and run instructions9pt90

README documents how to install the project.

License6pt100

Licensed under Apache-2.0.

Engineering

100

Tests18pt100

Test files detected (datafusion-cli/tests).

CI/CD14pt100

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

Linting and formatting5pt100

Linter or formatter configured (.editorconfig).

Reproducibility6pt100

Lockfile present (Cargo.lock). Installs are reproducible.

Issue and PR templates6pt100

Issue or PR templates present.

Project health

86

Dependency manifest6pt55

Dependency manifest found (Cargo.toml).

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

  • 275 / 1025
    Commits (30d / 90d)
  • 2,194
    Forks
  • 0
    Releases

Community

  • 87% - Good
    Community health
  • 18 bus factor
    authors own >50% of commits
  • 8,929
    Watchers

Responsiveness

  • 3h
    Median issue response
  • 23h
    Median PR merge time
  • 2,019
    Open issues
Repository files44 root entries
  • .ai
  • .devcontainer
    Good: Environment pinned via .devcontainer/Dockerfile.
  • .github
    Good: CI is configured (.github/workflows/dependencies.yml).
    Good: Dependabot covers 3 ecosystems (cargo, github-actions, pip). Dependencies stay current.
    Good: Issue or PR templates present.
  • benchmarks
  • ci
  • datafusion
  • datafusion-cli
    Good: Test files detected (datafusion-cli/tests).
  • datafusion-examples
  • dev
  • docs
  • python
  • test-utils
  • tmp
  • .asf.yaml
  • .dockerignore
  • .editorconfig
    Good: Linter or formatter configured (.editorconfig).
  • .gitattributes
  • .gitignore
    Good: .gitignore present.
  • .gitmodules
  • AGENTS.md
  • Cargo.lock
    Good: Lockfile present (Cargo.lock). Installs are reproducible.
  • Cargo.toml
    Good: Dependency manifest found (Cargo.toml).
  • CHANGELOG.md
  • CLAUDE.md
  • clippy.toml
  • CODE_OF_CONDUCT.md
    Good: Code of conduct present.
  • 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.
  • datafusion-testing
  • doap.rdf
  • header
  • LICENSE.txt
    Good: Licensed under Apache-2.0.
  • licenserc.toml
  • lychee.toml
  • NOTICE.txt
  • parquet-testing
  • pre-commit.sh
  • pyproject.toml
  • README.md
    Good: README is present.
    Good: README is well structured with multiple sections.
    Good: README includes screenshots or visuals. Great for first impressions.
    Issue: README has no code examples (−15 pts).Fix: Show a quick-start snippet so contributors can see what using your project looks like.
    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
  • rustfmt.toml
  • taplo.toml
  • testing
  • typos.toml
  • uv.lock
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