From 0375faa9670737191d0c276f3b5daf83a6cfc8e8 Mon Sep 17 00:00:00 2001
From: Tom Barrett <tom@tombarrett.xyz>
Date: Sun, 14 Jan 2024 17:53:28 +0100
Subject: flake to build wasm

---
 flake.nix | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 flake.nix

(limited to 'flake.nix')

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..e418992
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,41 @@
+{
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    buildRustPackage =
+      pkgs.rustPlatform.buildRustPackage.override
+      {rustc = pkgs.rustc-wasm32;};
+    rust-lld = pkgs.symlinkJoin {
+      name = "rust-lld";
+      paths = [pkgs.rustc-wasm32.llvmPackages.lld];
+      postBuild = ''
+        ln -s $out/bin/lld $out/bin/rust-lld
+      '';
+    };
+  in {
+    packages.x86_64-linux.default = buildRustPackage rec {
+      name = "gems";
+      src = ./.;
+      cargoLock = {
+        lockFile = ./Cargo.lock;
+      };
+      doCheck = false;
+      buildPhase = ''
+        cargo build --target wasm32-unknown-unknown --release
+        wasm-bindgen --out-name gems \
+        --out-dir $out \
+        --target web target/wasm32-unknown-unknown/release/gems.wasm
+      '';
+      installPhase = ''
+        cp -r assets $out
+        cp index.html $out
+      '';
+      nativeBuildInputs = [
+        rust-lld
+        pkgs.wasm-bindgen-cli
+      ];
+    };
+  };
+}
-- 
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