basic enum example

This is partly with a view to eventually abstracting away much of the boilerplate.

build

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# generate this file from Nix config for now to avoid duplication?
-
 cargo build --manifest-path ./rust/Cargo.toml
 
 BUNDLED_LIB_DIR=$(cabal list-bin . | sed -e 's=x/garnet/build/garnet/garnet=build=g')

flake.lock

@@ -527,15 +527,16 @@
     "hs-bindgen-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1776078838,
+        "lastModified": 1774599157,
-        "narHash": "sha256-f8SE6IuACy8bzIX+EOYTpekaAI/TOQ3zTwJKJmHl3LY=",
+        "narHash": "sha256-jgV67xhWzxMwyiyy5RPtu+VQvGTt+FoMXCWJcZ7lczY=",
         "owner": "well-typed",
         "repo": "hs-bindgen",
-        "rev": "ca714aca1ed941271ac248488c9a469554c5b470",
+        "rev": "3c4af10590d0d09e825a9735e9a03d7f60914e21",
         "type": "github"
       },
       "original": {
         "owner": "well-typed",
+        "ref": "release-0.1-alpha2",
         "repo": "hs-bindgen",
         "type": "github"
       }
@@ -560,11 +561,11 @@
     "libclang-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1775645278,
+        "lastModified": 1774600891,
-        "narHash": "sha256-JWARcbqH432vWcCvQ2bagTXBka8sCRNAnK1qOmnLWKw=",
+        "narHash": "sha256-LTAyNMY4Vu0vPeEq2wXB0KWY4kGtqtHTRmADjLdkv78=",
         "owner": "well-typed",
         "repo": "libclang",
-        "rev": "bf574efcb492d2738d8a82b6ce556f840ff92778",
+        "rev": "1054474fae403bfb52c7919680cac03d3d3d4237",
         "type": "github"
       },
       "original": {

flake.nix

@@ -3,7 +3,7 @@
     nix-haskell.url = "github:reflex-frp/nix-haskell";
     nixpkgs.follows = "nix-haskell/nixpkgs";
     hls-src = { url = "github:haskell/haskell-language-server/2.13.0.0"; flake = false; };
-    hs-bindgen-src = { url = "github:well-typed/hs-bindgen"; flake = false; };
+    hs-bindgen-src = { url = "github:well-typed/hs-bindgen/release-0.1-alpha2"; flake = false; };
     libclang-src = { url = "github:well-typed/libclang"; flake = false; };
     flake-utils.url = "github:numtide/flake-utils";
     crane.url = "github:ipetkov/crane";
@@ -16,7 +16,7 @@
     inputs:
     inputs.flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
     let
-      pkgs = haskell.nixpkgs.extend (import inputs.rust-overlay);
+      pkgs = (import inputs.nixpkgs { inherit system; }).extend (import inputs.rust-overlay);
       crane = (inputs.crane.mkLib pkgs).overrideToolchain (p: p.rust-bin.selectLatestNightlyWith (
         toolchain: toolchain.default.override {
           extensions = [ "rust-src" "rust-analyzer" ];
@@ -27,7 +27,7 @@
         ''
           export C_INCLUDE_PATH="${pkgs.stdenv.cc.libc.dev}/include''${C_INCLUDE_PATH:+:$C_INCLUDE_PATH}"
         '';
-      haskell = (import inputs.nix-haskell { inherit system inputs; } {
+      project = (import inputs.nix-haskell { inherit system inputs; } {
         name = "garnet";
         src = ./.;
         compiler-nix-name = "ghc914";
@@ -49,7 +49,6 @@
             };
             packages.garnet.components.library = {
               preBuild = addLibcIncludeDir;
-              # try removing?
               preConfigure = ''
                 mkdir -p rust/target/debug
                 ln -s ${garnet-rs}/include/garnet_rs.h rust/target/debug/garnet_rs.h
@@ -77,7 +76,7 @@
           withHaddock = true;
           shellHook = addLibcIncludeDir;
         };
-      });
+      }).project.haskell-nix;
       garnet-rs = crane.buildPackage {
         src = crane.cleanCargoSource ./rust;
         doCheck = false;
@@ -90,14 +89,14 @@
     in
     rec {
       defaultPackage = packages.garnet-exe;
-      packages = let garnet = haskell.project.haskell-nix.hsPkgs.garnet; in {
+      packages = let garnet = project.hsPkgs.garnet; in {
         inherit garnet-rs;
         garnet-exe = garnet.components.exes.garnet;
         garnet-lib = garnet.components.library;
       };
       devShells.default = pkgs.mkShell {
         inputsFrom = [
-          haskell.project.haskell-nix.shell
+          project.shell
           (crane.devShell { })
         ];
         packages = with pkgs; [

garnet.cabal

@@ -14,14 +14,6 @@ extra-source-files:
 -- extra-tmp-files:
 --     rust/target/debug/garnet_rs.h
 
--- actually maybe this is pointless given we always need debug path anyway in `extra-source-files`
--- plus we have it in `Raw.hs`
-flag dev
-  default:
-    False
-  manual:
-    True
-
 common common
     default-language: GHC2024
     default-extensions:
@@ -58,8 +50,6 @@ library
         GarnetRs.Raw
         GarnetRs.Wrapped
     hs-source-dirs: lib
-    -- if flag (dev)
-        -- include-dirs: rust/target/debug
     include-dirs: rust/target/debug
     -- HLS gives up entirely when the header is malformed if we do this
     -- and anyway, I don't think it gives us dependency tracking like `extra-source-files` does