Attempt at creating a default.nix for building Idris (with mtl_2_2_1)

default.nix

# Set the variable NIX_PATH to point to the directory where you've cloned the
# nixpkgs repository.  Then you can run one of two commands:
#
#   nix-build -A crashEnv
#
# This puts a script called 'load-env-crashEnv' into ./result/bin.  Running
# that script puts you into a shell where you can use all of the crash-related
# binaries.
#
#   nix-shell -A crash.safeIsa
#
# This puts you into a shell where you can work on a crash component.  The
# only special thing to note is that instead of calling 'cabal configure', you
# must use:
#
#   eval "$configurePhase"
#
# You are free to use "cabal build" for building, and "cabal test".  Do not
# use "cabal install", as it won't put the binaries anywhere that you will
# find them.  It's best to use what you build directly from the ./dist/build
# directory.
#
# If you ever need to configure again, or if cabal build tries to configure
# again, you must first run:
#
#   unset GHC_PACKAGE_PATH

{ pkgs ? (import <nixpkgs> { config = {
    allowUnfree = true;         # because we haven't set license params
  };})
}:

let
  haskellPkgs = pkgs.haskellPackages_ghc783;

  inherit (pkgs) stdenv;
  inherit (haskellPkgs) disableTest;

  callPackage = stdenv.lib.callPackageWith
    (pkgs // haskellPkgs // haskellDeps); # // crash);

  # crash = {
  #   safeIsa           = callPackage ./isa/tools/safe-isa {};
  #   safeSim           = callPackage ./isa/tools/safe-sim {};
  #   safeLib           = callPackage ./isa/code/safelib/safe-lib {};
  #   safeIsaTests      = callPackage ./isa/code/IsaTests/safe-isa-tests {};
  #   safeMeld          = callPackage ./isa/tools/safe-meld {};
  #   safeMeldLib       = callPackage ./isa/tools/safe-meld-lib {};
  #   safeScripts       = disableTest (callPackage ./isa/tools/safe-scripts {});
  #   languageSupport   = callPackage ./external/safe-lang-support {};
  #   tempestCompiler   = callPackage ./tempest/tempest-compiler {};
  #   simplePat         = callPackage ./applications/simple-pat/src/PATServer/haskell {};
  #   meldCore          = callPackage ./external/meld-core {};
  #   breezeCompiler    = callPackage ./external/breeze/breeze-compiler {};
  #   breezeCore        = callPackage ./external/breeze/breeze-core {};
  #   breezeInterpreter = callPackage ./external/breeze/breeze-interpreter/src {};
  # };

  # Build the SAFE tools with some specific dependencies.  If we move to GHC
  # 7.8 and more modern libraries, we can delete some or all of these.
  haskellDeps = pkgs.recurseIntoAttrs {
    # unbound = haskellPkgs.unbound.override { binary = haskellPkgs.binary_0_7_2_2; };
    # dataPartition = callPackage ./nix/data-partition-0.2.0.1.nix {};
    # eitherUnwrap  = disableTest (callPackage ./nix/either-unwrap-1.1.nix {});
    # polyparse  = callPackage ./nix/polyparse-1.9.nix {};
    # cpphs = haskellPkgs.cpphs.override {
    #   polyparse = callPackage ./nix/polyparse-1.9.nix {};
    # };
    # optparseApplicative = callPackage ./nix/optparse-applicative-0.9.1.1.nix {};
    inherit (haskellPkgs) ghc cabalInstall annotatedWlPprint ansiTerminal ansiWlPprint base64Bytestring binary
      blazeHtml blazeMarkup cheapskate deepseq directory filepath
      fingertree haskeline lens network optparseApplicative parsers
      process split text time trifecta unorderedContainers
      utf8String vector vectorBinaryInstances xml zlib;
    transformers = haskellPkgs.transformers_0_4_1_0;
    mtl_2_2_1 = haskellPkgs.mtl_2_2_1.override { transformers = haskellPkgs.transformers_0_4_1_0; };
  };

in {
  # crash = crash;
  deps  = haskellDeps;

  idrisEnv =
    with haskellPkgs; with haskellDeps; pkgs.myEnvFun {
    name = "idris";
    buildInputs = [
      ghc cabalInstall annotatedWlPprint ansiTerminal ansiWlPprint base64Bytestring binary
      blazeHtml blazeMarkup cheapskate deepseq filepath
      fingertree haskeline lens mtl_2_2_1 network optparseApplicative parsers
      process split text time transformers trifecta unorderedContainers
      utf8String vector vectorBinaryInstances xml zlib
    ];
  };

  # This is all you need to run the IsaTests:
  #
  #   nix-build -j4 -A crashTestEnv
  #   ./result/bin/load-env-crashTest
  #   cd src
  #   make clean
  #   make -j8
  #   cd ../isa/code/IsaTests
  #   make clean
  #   make asms-fast
  #   make safe-sim-fast

  # crashTestEnv = with haskellPkgs; with crash; pkgs.myEnvFun {
  #   name = "crashTest";
  #   buildInputs = [ safeIsa safeSim safeScripts ] ++ [
  #     ghc cabalInstall alex happy
  #   ];
  # };
}