WASM

flake.nix

@@ -0,0 +1,68 @@
+{
+  description = "MTP - Methanium Transport Protocol";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      rust-overlay,
+      flake-utils,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        overlays = [ rust-overlay.overlays.default ];
+        pkgs = import nixpkgs { inherit system overlays; };
+
+        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
+          extensions = [
+            "rust-src"
+            "clippy"
+            "rustfmt"
+          ];
+          targets = [ "wasm32-unknown-unknown" ];
+        };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          name = "mtp-dev";
+
+          buildInputs = with pkgs; [
+            rustToolchain
+            wasm-pack
+            pkg-config
+            openssl
+          ];
+
+          MTP_TYPE_MAPS = "${toString ./example-usage/type-maps.yaml}";
+
+          shellHook = ''
+            echo "MTP dev shell"
+            echo "  rustc  : $(rustc --version)"
+            echo "  cargo  : $(cargo --version)"
+            echo "  wasm-pack : $(wasm-pack --version 2>/dev/null || echo 'not found')"
+            echo "  targets: $(rustc --print target-list | grep wasm32 | tr '\n' ' ')"
+            echo "  MTP_TYPE_MAPS = $MTP_TYPE_MAPS"
+          '';
+        };
+
+        # Ad-hoc WASM build using wasm-pack
+        apps.wasm-build = {
+          type = "app";
+          program = "${pkgs.wasm-pack}/bin/wasm-pack";
+          args = [
+            "build"
+            "wasm"
+            "--target"
+            "web"
+          ];
+        };
+      }
+    );
+}