From 974526748731dd7fadbfc3a8188a73f5782f03cb Mon Sep 17 00:00:00 2001
From: Michael Zhang <mail@mzhang.io>
Date: Fri, 10 Nov 2023 19:21:37 -0600
Subject: [PATCH] build wasm

---
 .gitignore |  5 ++++-
 flake.nix  | 10 ++++++++--
 wasm.nix   | 18 ++++++++++++++++++
 3 files changed, 30 insertions(+), 3 deletions(-)
 create mode 100644 wasm.nix

diff --git a/.gitignore b/.gitignore
index ff51edf..094c23e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
-.direnv
\ No newline at end of file
+.direnv
+/triangle
+/triangle.wasm
+/result*
diff --git a/flake.nix b/flake.nix
index 9a6d5b0..893752b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,10 +5,16 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import nixpkgs { inherit system; };
-        flakePkgs = { triangle = pkgs.callPackage ./. { }; };
+        flakePkgs = {
+          triangle = pkgs.callPackage ./. { };
+          triangle-wasm = pkgs.callPackage ./wasm.nix { };
+        };
 
       in {
         packages = flakePkgs;
-        devShell = pkgs.mkShell { packages = with pkgs; [ nixfmt ]; };
+        devShell = pkgs.mkShell {
+          inputsFrom = with flakePkgs; [ triangle ];
+          packages = with pkgs; [ nixfmt emscripten ];
+        };
       });
 }
diff --git a/wasm.nix b/wasm.nix
new file mode 100644
index 0000000..c51e758
--- /dev/null
+++ b/wasm.nix
@@ -0,0 +1,18 @@
+{ buildEmscriptenPackage }:
+
+buildEmscriptenPackage {
+  name = "triangle";
+  src = ./.;
+
+  configurePhase = "";
+  buildPhase = ''
+    export EM_CACHE=/tmp/em-cache
+    emcc -o triangle triangle.c
+  '';
+  checkPhase = "";
+  installPhase = ''
+    mkdir -p $out
+    ls -al
+    mv triangle triangle.wasm $out
+  '';
+}