Add GitHub job for building WASM

.github/workflows/rust.yml

@@ -16,6 +16,7 @@ jobs:
     - uses: actions/checkout@v3
     - name: Install dependencies
       run: sudo apt-get install g++ pkg-config libx11-dev libasound2-dev libudev-dev libxkbcommon-x11-0
+    - uses: Swatinem/rust-cache@v2
     - name: Build
       run: cargo build --all --verbose --features bevy/x11
     - name: Run tests
@@ -26,7 +27,21 @@ jobs:
     - uses: actions/checkout@v3
     - name: Install dependencies
       run: sudo apt-get install g++ pkg-config libx11-dev libasound2-dev libudev-dev libxkbcommon-x11-0
+    - uses: Swatinem/rust-cache@v2
     - name: Check formatting
       run: cargo fmt --all --check
     - name: Check code quality
       run: cargo clippy --all --features bevy/x11 -- -Dwarnings
+  web:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install dependencies
+      run: sudo apt-get install g++ pkg-config libx11-dev libasound2-dev libudev-dev libxkbcommon-x11-0
+    - uses: Swatinem/rust-cache@v2
+    - name: Build debug
+      run: cargo build --target wasm32-unknown-unknown --all --verbose -Zbuild-std=std,panic_abort
+    - name: Generate files for debug
+      run: wasm-bindgen --no-typescript --target web --out-dir ./out_debug/ --out-name "pixlib" ./target/wasm32-unknown-unknown/debug/pixlib.wasm
+    - name: Summarize size of out dir for debug
+      run: du -sh ./out_debug