rust.nix

{ pkgs ? import ./pkgs.nix {} }:

with pkgs.pkgsStatic;

let
  fetchCargo = callPackage <nixpkgs/pkgs/build-support/rust/fetchcargo.nix>;

  rustBeta = with buildPackages; rust.packages.stable.overrideScope' (final: previous: {
    cargo = (previous.cargo.override {
      inherit (rust.packages.stable) rustPlatform;
    }).overrideAttrs (super: rec {
      preConfigure = "ln -s ${final.rustc.vendor} vendor";
    });

    cargo-vendor = runCommand "cargo-vendor" { buildInputs = [ makeWrapper ]; } ''
      makeWrapper ${final.cargo}/bin/cargo $out/bin/cargo-vendor --add-flags vendor
    '';

    rustc = (previous.rustc.override {
      inherit (rust.packages.stable) rustPlatform;
    }).overrideAttrs (super: rec {
      name = "rustc-${version}";
      version = "1.37.0-beta-2019-07-12";

      src = fetchFromGitHub {
        owner = "rust-lang";
        repo = "rust";
	rev = "2ba6de7e28692578b33251e73fc6f8ae6da41336";
        sha256 = "0wrh1jh9hl87wa7nq6giphlk7ybjlb41g2b832qaskk7fyva5mdn";
	fetchSubmodules = true;
      };

      preConfigure = "ln -s ${vendor} vendor";

      vendor = fetchCargo {} {
        inherit src;
        sha256 = "16y4q56v5nn3r4zljnxlq3x443dcnzvzahv5psnp18cin24qmifx";

        patches = [];
        sourceRoot = "";
        srcs = [];
      };
    });

    rustPlatform = rust.makeRustPlatform rustBeta;
  });

  rustNightly = rust.packages.stable.overrideScope' (final: previous: {
    cargo = (previous.cargo.override {
      inherit (rustBeta) rustPlatform;
    }).overrideAttrs (super: {
      preConfigure = "ln -s ${final.rustc.vendor} vendor";
    });
    
    rustc = (previous.rustc.override {
      inherit (rustBeta) rustPlatform;
    }).overrideAttrs (super: rec {
      name = "rustc-${version}";
      version = "nightly-2019-07-14";

      # rustbook pulls in openssl-sys, likely fixed in newer nightlies
      nativeBuildInputs = (super.nativeBuildInputs or []) ++ [ pkgconfig ];
      buildInputs = (super.buildInputs or []) ++ [ openssl ];
    
      src = fetchFromGitHub {
        owner = "rust-lang";
        repo = "rust";
        rev = "2ce227dcc6213947b0dab34cc4139b80525670db";
        sha256 = "08ykh9fh5rpc8yqmg6dl2df7cs5qqnsfarr0vjwdkp8yqw451y94";
        fetchSubmodules = true;
      };
      
      vendor = fetchCargo rec {
        inherit (rustBeta) cargo cargo-vendor;
      } {
        inherit src;
        sha256 = "0l9azdywlgkvvp9l3926lcpi6hibgm5sgjnc82f023kgrckzbas4";
      
        patches = [];
        sourceRoot = "";
        srcs = [];
      };
    
      preConfigure = "ln -s ${vendor} vendor";
    
      doCheck = false;
      patches = [];
    });
  });
in

rustNightly.rustc