From 753a038e7491d95cf639f4f8576fabad8f0421cb Mon Sep 17 00:00:00 2001
From: Woyten <woyten.tielesch@online.de>
Date: Mon, 1 Mar 2021 23:41:13 +0100
Subject: [PATCH] Make nannou package compile in WASM environment

---
 .cargo/config.toml           | 2 ++
 .github/workflows/nannou.yml | 6 ++++++
 nannou/Cargo.toml            | 4 ++++
 3 files changed, 12 insertions(+)
 create mode 100644 .cargo/config.toml

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 000000000..d02b01e15
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.wasm32-unknown-unknown]
+rustflags = ["--cfg", "web_sys_unstable_apis"]
diff --git a/.github/workflows/nannou.yml b/.github/workflows/nannou.yml
index 296a0830c..84c025a0d 100644
--- a/.github/workflows/nannou.yml
+++ b/.github/workflows/nannou.yml
@@ -113,11 +113,17 @@ jobs:
         profile: minimal
         toolchain: stable
         override: true
+        target: wasm32-unknown-unknown
     - name: Run check
       uses: actions-rs/cargo@v1
       with:
         command: check
         args: --examples --verbose
+    - name: Check nannou package builds against wasm32-unknown-unknown
+      uses: actions-rs/cargo@v1
+      with:
+        command: build
+        args: -p nannou --features wasm-experimental --target wasm32-unknown-unknown
 
   cargo-publish:
     if: github.event_name == 'push' && github.ref == 'refs/heads/master'
diff --git a/nannou/Cargo.toml b/nannou/Cargo.toml
index bce4beb04..de6c447d3 100644
--- a/nannou/Cargo.toml
+++ b/nannou/Cargo.toml
@@ -31,8 +31,12 @@ toml = "0.5"
 walkdir = "2"
 wgpu_upstream = { version = "0.11", package = "wgpu" }
 winit = "0.25"
+getrandom = "0.2.3"
 
 [features]
 default = ["notosans"]
 # Enables SPIR-V support in the `wgpu` module.
 spirv = ["nannou_wgpu/spirv"]
+# Enables experimental WASM compilation for CI-use only
+wasm-experimental = ["winit/web-sys", "getrandom/js"]
+