/
flake.nix
131 lines (120 loc) · 4.21 KB
/
flake.nix
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{
description = "srid/haskell-template: Nix template for Haskell projects";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
systems.url = "github:nix-systems/default";
flake-parts.url = "github:hercules-ci/flake-parts";
haskell-flake.url = "github:srid/haskell-flake";
treefmt-nix.url = "github:numtide/treefmt-nix";
treefmt-nix.inputs.nixpkgs.follows = "nixpkgs";
flake-root.url = "github:srid/flake-root";
mission-control.url = "github:Platonic-Systems/mission-control";
};
outputs = inputs:
inputs.flake-parts.lib.mkFlake { inherit inputs; } {
systems = import inputs.systems;
imports = [
inputs.haskell-flake.flakeModule
inputs.treefmt-nix.flakeModule
inputs.flake-root.flakeModule
inputs.mission-control.flakeModule
];
perSystem = { self', system, lib, config, pkgs, ... }: {
# Our only Haskell project. You can have multiple projects, but this template
# has only one.
# See https://github.com/srid/haskell-flake/blob/master/example/flake.nix
haskellProjects.default = {
# The base package set (this value is the default)
# basePackages = pkgs.haskellPackages;
# Packages to add on top of `basePackages`
packages = {
# Add source or Hackage overrides here
# (Local packages are added automatically)
/*
aeson.source = "1.5.0.0" # Hackage version
shower.source = inputs.shower; # Flake input
*/
};
# Add your package overrides here
settings = {
/*
haskell-template = {
haddock = false;
};
aeson = {
check = false;
};
*/
};
# Development shell configuration
devShell = {
hlsCheck.enable = false;
};
# What should haskell-flake add to flake outputs?
autoWire = [ "packages" "apps" "checks" ]; # Wire all but the devShell
};
# Auto formatters. This also adds a flake check to ensure that the
# source tree was auto formatted.
treefmt.config = {
inherit (config.flake-root) projectRootFile;
package = pkgs.treefmt;
programs.ormolu.enable = true;
programs.nixpkgs-fmt.enable = true;
programs.cabal-fmt.enable = true;
programs.hlint.enable = true;
# We use fourmolu
programs.ormolu.package = pkgs.haskellPackages.fourmolu;
settings.formatter.ormolu = {
options = [
"--ghc-opt"
"-XImportQualifiedPost"
];
};
};
# Dev shell scripts.
mission-control.scripts = {
docs = {
description = "Start Hoogle server for project dependencies";
exec = ''
echo http://127.0.0.1:8888
hoogle serve -p 8888 --local
'';
category = "Dev Tools";
};
repl = {
description = "Start the cabal repl";
exec = ''
cabal repl "$@"
'';
category = "Dev Tools";
};
fmt = {
description = "Format the source tree";
exec = config.treefmt.build.wrapper;
category = "Dev Tools";
};
run = {
description = "Run the project with ghcid auto-recompile";
exec = ''
ghcid -c "cabal repl exe:haskell-template" --warnings -T :main
'';
category = "Primary";
};
};
# Default package & app.
packages.default = self'.packages.haskell-template;
apps.default = self'.apps.haskell-template;
# Default shell.
devShells.default = pkgs.mkShell {
name = "haskell-template";
# See https://zero-to-flakes.com/haskell-flake/devshell#composing-devshells
inputsFrom = [
config.haskellProjects.default.outputs.devShell
config.flake-root.devShell
config.mission-control.devShell
config.treefmt.build.devShell
];
};
};
};
}