https://github.com/jedimahdi/fourmolu-nix

fourmolu nix configuration
https://github.com/jedimahdi/fourmolu-nix

flake-parts fourmolu nix nix-flake

Last synced: 2 days ago
JSON representation

fourmolu nix configuration

• Host: GitHub
• URL: https://github.com/jedimahdi/fourmolu-nix
• Owner: jedimahdi
• License: mit
• Created: 2024-01-28T03:48:10.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2024-02-07T00:34:40.000Z (11 months ago)
• Last Synced: 2024-11-05T10:04:21.500Z (about 2 months ago)
• Topics: flake-parts, fourmolu, nix, nix-flake
• Language: Nix
• Homepage: https://jedimahdi.github.io/fourmolu-nix/
• Size: 13.7 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# Fourmolu-nix

`fourmolu-nix` makes a wrapper for fourmolu with settings already pass to it so

you no longer need `fourmolu.yaml` or even to be in root of project to have

these options set for you.

## Getting started

For creating the wrapper, you can use `mkWrapper` function from lib which takes

pkgs and configuration and returns wrapped fourmolu with the provided configuration.

### Flakes

```nix

# flake.nix

{

  inputs = {

    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

    utils.url = "github:numtide/flake-utils";

    fourmolu-nix.url = "github:jedimahdi/fourmolu-nix";

  };

  outputs = {

    nixpkgs,

    utils,

    fourmolu-nix,

    ...

  }:

    utils.lib.eachDefaultSystem (

      system: let

        pkgs = nixpkgs.legacyPackages.${system};

        fourmoluWrapper = fourmolu-nix.lib.mkWrapper pkgs {

          settings = {

            indentation = 4;

            comma-style = "leading";

            record-brace-space = true;

            extensions = ["OverloadedRecordDot", "RecordWildCards"];

          };

        };

      in {

        devShells.default = pkgs.mkShell {

          nativeBuildInputs = [

            fourmoluWrapper

          ];

        };

      }

    );

}

```

### Flake-parts

With flake-parts you don't need to call `mkWrapper`, just add

`inputs.fourmolu-nix.flakeModule` to list of imports.

Fourmolu wrapper will be accessible via `config.fourmolu.wrapper`.

```nix

{

  inputs = {

    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";

    flake-parts.url = "github:hercules-ci/flake-parts";

    fourmolu-nix.url = "github:jedimahdi/fourmolu-nix";

  };

  outputs = inputs:

    inputs.flake-parts.lib.mkFlake {inherit inputs;} {

      imports = [

        inputs.fourmolu-nix.flakeModule

      ];

      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];

      perSystem = {

        config,

        pkgs,

        ...

      }: {

        fourmolu.settings = {

          indentation = 4;

          import-export-style = "diff-friendly";

          extensions = ["ImportQualifiedPost" "OverloadedRecordDot"];

        };

        devShells.default = pkgs.mkShell {

          nativeBuildInputs = [

            config.fourmolu.wrapper

          ];

        };

      };

    };

}

```

Note: `fourmolu-nix` will automatically set the wrapper package for `treefmt-nix`

fourmolu program.

## Configuration

See [options](https://jedimahdi.github.io/fourmolu-nix/options.html) for the full list of configs.