{ pkgs, ... }:

{

projectRootFile = "flake.nix";

# Nix — RFC 166 formatter.

programs.nixfmt.enable = true;

# Dhall — spago.dhall / packages.dhall layout.

programs.dhall.enable = true;

# PureScript — purs-tidy is not a first-class treefmt program, so wire it via

# the generic mechanism. It picks up `.tidyrc.json` from the project root.

settings.formatter.purs-tidy = {

command = "${pkgs.purs-tidy}/bin/purs-tidy";

options = [ "format-in-place" ];

includes = [ "*.purs" ];

};

# Lua FFI — LuaFormatter keeps the parentheses pslua's foreign-file parser

# requires (unlike StyLua, which strips them). Config in `.lua-format`.

settings.formatter.lua-format = {

command = "${pkgs.luaformatter}/bin/lua-format";

options = [

"-i"

"-c"

".lua-format"

];

includes = [ "*.lua" ];

};

# Never format generated output or vendored trees.

settings.global.excludes = [

"dist/*"

"output/*"

".spago/*"

"node_modules/*"

"*.lock"

"flake.lock"

"spago.lock"

".tidyrc.json"

".lua-format"

];

}