raycharles/shell.nix

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{ nixpkgs ? import <nixpkgs> {}, compiler ? "default", doBenchmark ? false }:
let
inherit (nixpkgs) pkgs;
f = { mkDerivation, ansi-terminal, base, deepseq, linear, matrix
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, monad-loops, parallel, stdenv, suspend, terminal-size, vector
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}:
mkDerivation {
pname = "raycharles";
version = "0.0.0.0";
src = ./.;
isLibrary = false;
isExecutable = true;
executableHaskellDepends = [
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ansi-terminal base deepseq linear matrix monad-loops parallel
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suspend terminal-size vector
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];
description = "A simple raytracer on the Console";
license = stdenv.lib.licenses.bsd3;
};
haskellPackages = if compiler == "default"
then pkgs.haskellPackages
else pkgs.haskell.packages.${compiler};
variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
drv = variant (haskellPackages.callPackage f {});
in
if pkgs.lib.inNixShell then drv.env else drv