nixpkgs/pkgs/development/haskell-modules/generic-stack-builder.nix

{ stdenv, ghc, pkgconfig, glibcLocales
, cacert, stack, makeSetupHook, lib }@depArgs:

{ buildInputs ? []
, nativeBuildInputs ? []
, extraArgs ? []
, LD_LIBRARY_PATH ? []
, ghc ? depArgs.ghc
, stack ? depArgs.stack
, ...
}@args:

let

  stackCmd = "stack --internal-re-exec-version=${stack.version}";

  # Add all dependencies in buildInputs including propagated ones to
  # STACK_IN_NIX_EXTRA_ARGS.
  stackHook = makeSetupHook {} ./stack-hook.sh;

in stdenv.mkDerivation (args // {

  buildInputs = buildInputs
    ++ lib.optional (stdenv.hostPlatform.libc == "glibc") glibcLocales;

  nativeBuildInputs = nativeBuildInputs
    ++ [ ghc pkgconfig stack stackHook ];

  STACK_PLATFORM_VARIANT = "nix";
  STACK_IN_NIX_SHELL = 1;
  STACK_IN_NIX_EXTRA_ARGS = extraArgs;

  # XXX: workaround for https://ghc.haskell.org/trac/ghc/ticket/11042.
  LD_LIBRARY_PATH = lib.makeLibraryPath (LD_LIBRARY_PATH ++ buildInputs);
                    # ^^^ Internally uses `getOutput "lib"` (equiv. to getLib)

  # Non-NixOS git needs cert
  GIT_SSL_CAINFO = "${cacert}/etc/ssl/certs/ca-bundle.crt";

  # Fixes https://github.com/commercialhaskell/stack/issues/2358
  LANG = "en_US.UTF-8";

  preferLocalBuild = true;

  preConfigure = ''
    export STACK_ROOT=$NIX_BUILD_TOP/.stack
  '';

  buildPhase = args.buildPhase or ''
    runHook preBuild

    ${stackCmd} build

    runHook postBuild
  '';

  checkPhase = args.checkPhase or ''
    runHook preCheck

    ${stackCmd} test

    runHook postCheck
  '';

  doCheck = args.doCheck or true;

  installPhase = args.installPhase or ''
    runHook preInstall

    ${stackCmd} --local-bin-path=$out/bin build --copy-bins

    runHook postInstall
  '';
})