add nix flake

.gitignore

@@ -1,2 +1,5 @@
 TAGS
 dist-newstyle
+result
+result-*
+tags

default.nix

@@ -0,0 +1,22 @@
+{ mkDerivation, base, bytestring, containers, exceptions, inline-c
+, lib, primitive, process, python3-embed, quickcheck-instances, stm
+, tasty, tasty-bench, tasty-hunit, tasty-quickcheck
+, template-haskell, text, transformers, vector
+}:
+mkDerivation {
+  pname = "inline-python";
+  version = "0.1.1.1";
+  sha256 = "169f3xa2v53h5pqkc6h34wswyl0y3311xq66jwshxh80ynp37nj3";
+  libraryHaskellDepends = [
+    base bytestring containers exceptions inline-c primitive process
+    quickcheck-instances stm tasty tasty-hunit tasty-quickcheck
+    template-haskell text transformers vector
+  ];
+  libraryPkgconfigDepends = [ python3-embed ];
+  testHaskellDepends = [ base tasty ];
+  benchmarkHaskellDepends = [ base tasty tasty-bench ];
+  doHaddock = false;
+  homepage = "https://github.com/Shimuuar/inline-python";
+  description = "Python interpreter embedded into haskell";
+  license = lib.licenses.bsd3;
+}

flake.nix

@@ -0,0 +1,113 @@
+{
+  description = "Embedding of python interpreter into haskell programs";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs @ {
+    self,
+    nixpkgs,
+    flake-parts,
+    ...
+  }:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = builtins.attrNames nixpkgs.legacyPackages;
+      perSystem = attrs @ {
+        system,
+        pkgs,
+        ...
+      }: let
+        pkgs = attrs.pkgs.extend self.overlays.default;
+
+        py = pkgs.python3.withPackages (py_pkg: with py_pkg;
+          [ numpy
+            matplotlib
+          ]);
+      in {
+        devShells.default = pkgs.haskellPackages.shellFor {
+          name = "inline-python-devShell";
+          packages = p: [p.inline-python];
+          nativeBuildInputs = with pkgs.haskellPackages; [
+            pkgs.cabal-install
+            cabal2nix
+            haskell-language-server
+          ];
+          buildInputs = with pkgs; [
+              py
+              pkg-config
+          ];
+
+          shellHook = ''
+            export PYTHONHOME=${py}
+          '';
+        };
+
+        packages = rec {
+          default = inline-python;
+          inherit
+            (pkgs.haskellPackages)
+            inline-python
+            ;
+        };
+
+      };
+      flake = {
+        overlays = {
+          default = final: prev:
+            with final.haskell.lib;
+            with final.lib; let
+              # NOTE: haskellPackages' so that we don't rebuild the world in the devShell 
+              # due to the overrides
+              haskellPackages' = prev.haskellPackages.override (old: {
+                overrides = prev.lib.composeExtensions (old.overrides or (_: _: {})) (
+                    hself: hsuper: {
+                      vector = dontCheck hsuper.vector_0_13_2_0;
+                      primitive = hsuper.primitive_0_9_0_0;
+                      scientific = hsuper.scientific_0_3_8_0;
+                      uuid-types = hsuper.uuid-types_1_0_6;
+                      quickcheck-instances = hsuper.quickcheck-instances_0_3_32;
+
+                      inline-python = (buildFromSdist (
+                        overrideCabal (hsuper.callPackage ./default.nix { 
+                          python3-embed = final.python3; 
+                        })
+                        (old: {
+                          configureFlags =
+                            (old.configureFlags or [])
+                            ++ [
+                              "--ghc-options=-O2"
+                              "--ghc-options=-j"
+                              "--ghc-options=+RTS"
+                              "--ghc-options=-A256m"
+                              "--ghc-options=-n4m"
+                              "--ghc-options=-RTS"
+                              "--ghc-options=-Wall"
+                              # "--ghc-options=-Werror" # the current version has a bunch of warnings
+                              "--ghc-options=-Wincomplete-uni-patterns"
+                              "--ghc-options=-Wincomplete-record-updates"
+                              "--ghc-options=-Wpartial-fields"
+                              "--ghc-options=-Widentities"
+                              "--ghc-options=-Wredundant-constraints"
+                              "--ghc-options=-Wcpp-undef"
+                              "--ghc-options=-Wunused-packages"
+                              "--ghc-options=-Wno-deprecations"
+                            ];
+                        })
+                      ));
+                    }
+                  );
+              });
+            in {
+              haskellPackages = prev.haskellPackages.override (old: {
+                overrides = prev.lib.composeExtensions (old.overrides or (_: _: {})) (
+                  hself: hsuper: {
+                      inline-python = haskellPackages'.inline-python;
+                  });
+              });
+            };
+        };
+      };
+    };
+}

package.nix

@@ -0,0 +1,22 @@
+{ mkDerivation, base, bytestring, containers, exceptions, inline-c
+, lib, primitive, process, python3-embed, quickcheck-instances, stm
+, tasty, tasty-bench, tasty-hunit, tasty-quickcheck
+, template-haskell, text, transformers, vector
+}:
+mkDerivation {
+  pname = "inline-python";
+  version = "0.1.1.1";
+  sha256 = "169f3xa2v53h5pqkc6h34wswyl0y3311xq66jwshxh80ynp37nj3";
+  libraryHaskellDepends = [
+    base bytestring containers exceptions inline-c primitive process
+    quickcheck-instances stm tasty tasty-hunit tasty-quickcheck
+    template-haskell text transformers vector
+  ];
+  libraryPkgconfigDepends = [ python3-embed ];
+  testHaskellDepends = [ base tasty ];
+  benchmarkHaskellDepends = [ base tasty tasty-bench ];
+  doHaddock = false;
+  homepage = "https://github.com/Shimuuar/inline-python";
+  description = "Python interpreter embedded into haskell";
+  license = lib.licenses.bsd3;
+}