106 lines
3.9 KiB
Nix
106 lines
3.9 KiB
Nix
{
|
|
description = "haskell-template's description";
|
|
inputs = {
|
|
# To find a suitable nixpkgs hash with cache, pick one from https://status.nixos.org/
|
|
nixpkgs.url = "github:nixos/nixpkgs/4d60081494259c0785f7e228518fee74e0792c1b";
|
|
flake-utils.url = "github:numtide/flake-utils";
|
|
flake-utils.inputs.nixpkgs.follows = "nixpkgs";
|
|
flake-compat.url = "github:edolstra/flake-compat";
|
|
flake-compat.flake = false;
|
|
flake-compat.inputs.nixpkgs.follows = "nixpkgs";
|
|
lint-utils = {
|
|
type = "git";
|
|
url = "https://gitlab.homotopic.tech/nix/lint-utils.git";
|
|
ref = "spec-type"; # https://gitlab.homotopic.tech/nix/lint-utils/-/merge_requests/4
|
|
inputs.nixpkgs.follows = "nixpkgs";
|
|
};
|
|
};
|
|
outputs = inputs@{ self, nixpkgs, flake-utils, ... }:
|
|
flake-utils.lib.eachDefaultSystem
|
|
(system:
|
|
let
|
|
# Because: https://zimbatm.com/notes/1000-instances-of-nixpkgs
|
|
pkgs = nixpkgs.legacyPackages.${system};
|
|
|
|
# Change GHC version here. To get the appropriate value, run:
|
|
# nix-env -f "<nixpkgs>" -qaP -A haskell.compiler
|
|
hp = pkgs.haskellPackages; # pkgs.haskell.packages.ghc921;
|
|
|
|
project = returnShellEnv:
|
|
hp.developPackage {
|
|
inherit returnShellEnv;
|
|
name = "haskell-template";
|
|
root = ./.;
|
|
withHoogle = false;
|
|
overrides = self: super: with pkgs.haskell.lib; {
|
|
# Use callCabal2nix to override Haskell dependencies here
|
|
# cf. https://tek.brick.do/K3VXJd8mEKO7
|
|
# Example:
|
|
# > NanoID = self.callCabal2nix "NanoID" inputs.NanoID { };
|
|
# Assumes that you have the 'NanoID' flake input defined.
|
|
};
|
|
modifier = drv:
|
|
pkgs.haskell.lib.addBuildTools drv (with hp; pkgs.lib.lists.optionals returnShellEnv [
|
|
# Specify your build/dev dependencies here.
|
|
cabal-fmt
|
|
cabal-install
|
|
ghcid
|
|
haskell-language-server
|
|
fourmolu
|
|
hlint
|
|
pkgs.nixpkgs-fmt
|
|
]);
|
|
};
|
|
|
|
lintSpec = {
|
|
nixpkgs-fmt = { };
|
|
cabal-fmt = { };
|
|
fourmolu = {
|
|
ghcOpts = "-o-XTypeApplications -o-XImportQualifiedPost";
|
|
};
|
|
};
|
|
|
|
# Checks the shell script using ShellCheck
|
|
checkedShellScript = name: text:
|
|
(pkgs.writeShellApplication {
|
|
inherit name text;
|
|
}) + "/bin/${name}";
|
|
|
|
in
|
|
{
|
|
# Used by `nix build` & `nix run` (prod exe)
|
|
defaultPackage = project false;
|
|
# Used by `nix develop` (dev shell)
|
|
devShell = project true;
|
|
|
|
# Used by `nix run ...`
|
|
apps = {
|
|
format = inputs.lint-utils.mkApp.${system} lintSpec;
|
|
};
|
|
|
|
# Used by `nix flake check` (but see next attribute)
|
|
checks =
|
|
inputs.lint-utils.mkChecks.${system} lintSpec ./.
|
|
// {
|
|
hls = checkedShellScript "hls" "${hp.haskell-language-server}/bin/haskell-language-server";
|
|
};
|
|
|
|
# We need this hack because `nix flake check` won't work for Haskell
|
|
# projects: https://nixos.wiki/wiki/Import_From_Derivation#IFD_and_Haskell
|
|
#
|
|
# Instead, run: `nix build .#check.x86_64-linux` (replace with your system)
|
|
check =
|
|
pkgs.runCommand "combined-checks"
|
|
{
|
|
checksss = builtins.attrValues self.checks.${system};
|
|
} ''
|
|
echo $checksss
|
|
touch $out
|
|
'';
|
|
|
|
}) // {
|
|
# For hercules-CI support,
|
|
# https://docs.hercules-ci.com/hercules-ci/guides/upgrade-to-agent-0.9/#_upgrade_your_repositories
|
|
herculesCI.ciSystems = [ "x86_64-linux" ];
|
|
};
|
|
}
|