add nix flake for building on nixos

.envrc

@@ -0,0 +1 @@
+use flake

Cargo.toml

@@ -29,14 +29,16 @@ debug = false
 # Tell `rustc` to optimize for small code size s or speed 2 / 3.
 opt-level = 3
 
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-O4", "--enable-bulk-memory"]
+
 [dependencies]
 serde_json = "1.0.132"
 serde = { version = "1.0.213", features = ["derive"] }
 chrono = { version = "0.4.38", features = ["wasmbind", "serde"] }
 lazy_static = "1.5.0"
 
-# simple WASM codegen
-wasm-bindgen = { version = "0.2.92" }
+wasm-bindgen = { version = "0.2", features = ["serde-serialize"] }
 # instead of wasm-bindgen::serde-serialize feature that may lead to a cyclic package dependency 
 serde-wasm-bindgen = "0.6.5"
 

flake.nix

@@ -0,0 +1,39 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, fenix, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        toolchain = with fenix.packages.${system}; combine [
+          complete.toolchain
+          targets.wasm32-unknown-unknown.latest.rust-std
+        ];
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            toolchain
+            pkgs.wasm-pack
+            pkgs.rust-analyzer
+          ] ++ (with pkgs; [
+            pkg-config
+            openssl
+            # Add LLVM tools for WASM linking
+            llvmPackages.bintools
+          ]);
+
+          RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
+          # Set the linker for WASM
+          CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_LINKER = "lld";
+        };
+      }
+    );
+}

pkg/package.json

@@ -1,7 +1,8 @@
 {
   "name": "zinzen",
+  "type": "module",
   "description": "Algorithm for auto-scheduling time-constrained tasks on a timeline",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "license": "AGPL-3.0-or-later",
   "repository": {
     "type": "git",
@@ -13,7 +14,7 @@
     "scheduler.d.ts",
     "LICENSE.md"
   ],
-  "module": "scheduler.js",
+  "main": "scheduler.js",
   "homepage": "https://github.com/tijlleenders/ZinZen-scheduler",
   "types": "scheduler.d.ts",
   "sideEffects": [

pkg/scheduler.d.ts

@@ -19,12 +19,15 @@ export type InitInput = RequestInfo | URL | Response | BufferSource | WebAssembl
 
 export interface InitOutput {
   readonly memory: WebAssembly.Memory;
-  readonly schedule: (a: number, b: number) => void;
+  readonly schedule: (a: number) => Array;
   readonly __wbindgen_malloc: (a: number, b: number) => number;
   readonly __wbindgen_realloc: (a: number, b: number, c: number, d: number) => number;
-  readonly __wbindgen_add_to_stack_pointer: (a: number) => number;
+  readonly __wbindgen_export_2: WebAssembly.Table;
+  readonly __externref_table_dealloc: (a: number) => void;
   readonly __wbindgen_free: (a: number, b: number, c: number) => void;
   readonly __wbindgen_exn_store: (a: number) => void;
+  readonly __externref_table_alloc: () => number;
+  readonly __wbindgen_start: () => void;
 }
 
 export type SyncInitInput = BufferSource | WebAssembly.Module;