treefmt

treefmt-nix

Import treefmtModule to enable the programs.nuten option in treefmt-nix.

treefmt-nix.lib.evalModule pkgs {
  imports = [ inputs.nuten.treefmtModule ]; # github:mst-mkt/nuten
  programs.nuten = {
    enable = true;
    excludes = [ "tests/fixtures/*" ];
    settings = {
      line_width = 80;
    };
  };
}

settings accepts the same options as the config file. Write include and exclude in treefmt's includes and excludes, not in settings.

When settings is set, Nuten ignores the project's config file. If you also run Nuten outside treefmt, such as with nuten format or from an editor, leave out settings and keep your settings in the project's config file. In that case, list the files to format in includes and excludes of programs.nuten, and also in include and exclude of the config file.

Prebuilt binaries are available from the binary cache.

treefmt.toml

treefmt uses the nuten on the PATH, so install nuten first.

[formatter.nuten]
command = "nuten"
options = ["format"]
includes = ["*.nu", "*.nuon"]

Formatting settings go in the project's config file.

Specify the files to format in includes and excludes of [formatter.nuten]. If you also run Nuten outside treefmt, such as with nuten format or from an editor, repeat the same patterns in include and exclude of the config file.