default.nix

# This default.nix builds a tarball containing a statically linked
# Futhark binary and some manpages.  Likely to only work on linux.
#
# Just run 'nix-build' and fish the tarball out of 'result/'.

let
  # Fetch the latest haskell.nix and import its default.nix
  haskellNix = import (builtins.fetchTarball https://github.com/input-output-hk/haskell.nix/archive/master.tar.gz) {};

  # haskell.nix provides access to the nixpkgs pins which are used by our CI, hence
  # you will be more likely to get cache hits when using these.
  # But you can also just use your own, e.g. '<nixpkgs>'
  nixpkgsSrc = haskellNix.sources.nixpkgs-2003;

  # haskell.nix provides some arguments to be passed to nixpkgs, including some patches
  # and also the haskell.nix functionality itself as an overlay.
  nixpkgsArgs = haskellNix.nixpkgsArgs;
in
{ pkgs ? import nixpkgsSrc nixpkgsArgs,
  haskellCompiler ? "ghc883",
  suffix ? "nightly",
  commit ? "" }:

let futharkProject =
      pkgs.haskell-nix.cabalProject {
        # 'cleanGit' cleans a source directory based on the files known by git
        src = pkgs.haskell-nix.haskellLib.cleanGit { name = "futhark"; src = ./.; };
        compiler-nix-name = haskellCompiler;
      };

    futhark =
      futharkProject.components.exes.futhark;

in pkgs.stdenv.mkDerivation rec {
  name = "futhark-" + suffix;
  version = futhark.version;
  src = tools/release;

  buildInputs = [ futhark ];

  buildPhase = ''
    cp -r skeleton futhark-${suffix}
    cp -r ${futhark}/bin futhark-${suffix}/bin
    mkdir -p futhark-${suffix}/share
    cp -r ${futhark}/share/man futhark-${suffix}/share/
    chmod +w -R futhark-${suffix}
    cp ${futhark}/share/futhark/LICENSE futhark-${suffix}/
    [ "${commit}" ] && echo "${commit}" > futhark-${suffix}/commit-id
    tar -Jcf futhark-${suffix}.tar.xz futhark-${suffix}
   '';

  installPhase = ''
    mkdir -p $out
    cp futhark-${suffix}.tar.xz $out/futhark-${suffix}.tar.xz
  '';
}