An opinionated formatter for Nix.

A formatter for Nix that ensures consistent and clear formatting by forgetting all existing formatting during parsing.

nixfmt

nixfmt is a formatter for Nix code, intended to easily apply a uniform style.

You are encouraged to test this out on your code and submit any undesirable formatting you find as an issue

Installation

• nixfmt is in nixpkgs master as of 2019-09-04:

  nix-env -iA nixpkgs.nixfmt
  

• To get the most recent version, install from master:

  nix-env -f https://github.com/serokell/nixfmt/archive/master.tar.gz -i
  

• Nix with flakes

  nix profile install github:serokell/nixfmt
  

Development

With Nix

Haskell dependencies will be built by Nix.

• Enter nix-shell
• Build with cabal new-build

Without Nix

Haskell dependencies will be built by Cabal.

• Build with cabal new-build

Usage

• nixfmt < input.nix – reads Nix code from stdin, formats it, and outputs to stdout
• nixfmt file.nix – format the file in place

About Serokell

nixfmt is maintained and funded with :heart: by Serokell. The names and logo for Serokell are trademark of Serokell OÜ.

We love open source software! See our other projects or hire us to design, develop and grow your idea!