106 lines
3.6 KiB
Nix
106 lines
3.6 KiB
Nix
{
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description = "srid/haskell-template: Nix template for Haskell projects";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
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systems.url = "github:nix-systems/default";
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flake-parts.url = "github:hercules-ci/flake-parts";
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haskell-flake.url = "github:srid/haskell-flake";
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treefmt-nix.url = "github:numtide/treefmt-nix";
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treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
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flake-root.url = "github:srid/flake-root";
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mission-control.url = "github:Platonic-Systems/mission-control";
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};
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outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
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flake-parts.lib.mkFlake { inherit inputs; } {
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systems = import inputs.systems;
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imports = [
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inputs.haskell-flake.flakeModule
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inputs.treefmt-nix.flakeModule
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inputs.flake-root.flakeModule
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inputs.mission-control.flakeModule
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];
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perSystem = { self', system, lib, config, pkgs, ... }: {
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# Our only Haskell project. You can have multiple projects, but this template
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# has only one.
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# See https://github.com/srid/haskell-flake/blob/master/example/flake.nix
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haskellProjects.default = {
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# packages.haskell-template.root = ./.; # Auto-discovered by haskell-flake
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overrides = self: super: { };
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devShell = {
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tools = hp: {
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treefmt = config.treefmt.build.wrapper;
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} // config.treefmt.build.programs;
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hlsCheck.enable = true;
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};
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autoWire = [ "packages" "apps" "checks" ]; # Wire all but the devShell
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};
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# Auto formatters. This also adds a flake check to ensure that the
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# source tree was auto formatted.
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treefmt.config = {
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inherit (config.flake-root) projectRootFile;
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package = pkgs.treefmt;
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flakeFormatter = false; # For https://github.com/numtide/treefmt-nix/issues/55
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programs.ormolu.enable = true;
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programs.nixpkgs-fmt.enable = true;
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programs.cabal-fmt.enable = true;
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programs.hlint.enable = true;
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# We use fourmolu
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programs.ormolu.package = pkgs.haskellPackages.fourmolu;
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settings.formatter.ormolu = {
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options = [
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"--ghc-opt"
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"-XImportQualifiedPost"
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];
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};
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};
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# Dev shell scripts.
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mission-control.scripts = {
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docs = {
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description = "Start Hoogle server for project dependencies";
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exec = ''
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echo http://127.0.0.1:8888
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hoogle serve -p 8888 --local
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'';
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category = "Dev Tools";
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};
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repl = {
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description = "Start the cabal repl";
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exec = ''
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cabal repl "$@"
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'';
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category = "Dev Tools";
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};
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fmt = {
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description = "Format the source tree";
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exec = config.treefmt.build.wrapper;
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category = "Dev Tools";
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};
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run = {
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description = "Run the project with ghcid auto-recompile";
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exec = ''
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ghcid -c "cabal repl exe:haskell-template" --warnings -T :main
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'';
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category = "Primary";
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};
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};
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# Default package & app.
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packages.default = self'.packages.haskell-template;
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apps.default = self'.apps.haskell-template;
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# Default shell.
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devShells.default = pkgs.mkShell {
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inputsFrom = [
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config.haskellProjects.default.outputs.devShell
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config.flake-root.devShell
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config.mission-control.devShell
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];
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};
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};
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};
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}
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