List of Nix linters

[schuelermine]

Here’s a list of linters I’ve found for Nix. Feel free to reply with any I’ve missed.
I’ve added some comments saying what I find unique about some of them.

List of linting tools for Nix

• statix
  • Source: GitHub - nerdypepper/statix: lints and suggestions for the nix programming language
  • Nixpkgs attribute: statix
  • Flake URI: github:NixOS/nixpkgs#statix
  • Pretty output
• nix-lint
  • Source: Supposedly GitHub - Warbo/nix-lint: Mirror of http://chriswarbo.net/git/nix-lint.git, but that’s unavailable,
    mirror at GitHub - Warbo/nix-lint: Mirror of http://chriswarbo.net/git/nix-lint.git
  • Highly minimal, no batch processing or other niceties
• nixpkgs-lint
  • Source: GitHub - nix-community/nixpkgs-lint: A fast semantic linter for Nix using tree-sitter 🌳 + ❄️. [maintainers=@Artturin,@siraben]
  • Flake URI: github:nix-community/nix-lint
  • Uses JavaScript & is meant for nixpkgs specifically
• nix-linter
  • Source: GitHub - Synthetica9/nix-linter: Linter for the Nix expression language
  • Nixpkgs attribute: nix-linter
  • Flake URI: github:NixOS/nixpkgs#nix-linter
  • Seems the most popular
• nixpkgs-hammering
  • Source: GitHub - jtojnar/nixpkgs-hammering: Beat your package expressions into a shape
  • Flake URI: github:jtojnar/nixpkgs-hammering
  • Specifically for nixpkgs packages
• nixpkgs-lint
  • Source: nixpkgs/maintainers/scripts/nixpkgs-lint.pl at master · NixOS/nixpkgs · GitHub
  • Nixpkgs attribute: nixpkgs-lint
  • Flake URI: github:NixOS/nixpkgs#nixpkgs-lint
  • Built into and specifically for nixpkgs
• nil
  • Source: GitHub - oxalica/nil: NIx Language server, an incremental analysis assistant for writing in Nix.
  • Nixpkgs attribute nil
  • Flake URI: github:oxalica/nil#
  • This is a language server, not a linter, but it does provide lints
• nixd
  • Source: GitHub - nix-community/nixd: Nix language server, based on nix libraries [maintainer=@inclyc]
  • Nixpkgs attribute: nixd
  • Flake URI: github:nix-community/nixd#
  • This is a language server, not a linter. I haven’t checked if it provides lints.
• deadnix
  • Source: GitHub - astro/deadnix: Scan Nix files for dead code
  • Nixpkgs attribute: deadnix
  • Flake URI: github:astro/deadnix#
  • Scans for dead code (unused variable bindings) in Nix files

[ryantm]

nixpkgs-hammering is a linter specifically for nixpkgs derivations.

[schuelermine]

Thanks, I’ve added it

[Lord-Valen]

GitHub - nix-community/nixpkgs-lint: A fast semantic linter for Nix using tree-sitter 🌳 + ❄️. [maintainers=@Artturin,@siraben] (not to be confused with the old nixpkgs script) is made for nixpkgs.

[futile]

Since this was bumped, can probably also add nixd:

Nixd: nix language server

Recently I wrote a brand new nix language server, which links with official NixOS/nix library. Home page: https://github.com/nix-community/nixd/ About Nixd is a Nix language server that directly uses (i.e., is linked with) the official Nix library (https://github.com/NixOS/nix). Some notable features provided by linking with the Nix library include: Nixpkgs option support, for all option system (NixOS/home-manager/flake-parts). Diagnostics and evaluation that produce identical results as t…

[figsoda]

This is already listed as nix-lint, which is the name before it was renamed

[figsoda]

I would also like to add GitHub - astro/deadnix: Scan Nix files for dead code

[schuelermine]

Thank you for the recommendations, I have added them.