Add formatting rust shaders to CI

.github/workflows/rust.yml

@@ -26,12 +26,12 @@ jobs:
           - os: macos-latest
             name: macOS-SwiftShader
             use_swiftshader: true
-    
+
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: "recursive"
-      
+
       - name: Install Vulkan SDK
         shell: bash
         env:
@@ -64,19 +64,19 @@ jobs:
             echo "PATH=$VULKAN_SDK\\Bin;$PATH" >> $GITHUB_ENV
             cd "$GITHUB_WORKSPACE"
           fi
-      
+
       - if: ${{ runner.os == 'Linux' }}
         name: Install Linux graphics dependencies
         run: |
           sudo add-apt-repository ppa:kisak/turtle -y
           sudo apt-get update
           sudo apt install -y xvfb libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
-      
+
       - if: ${{ runner.os == 'macOS' && matrix.use_moltenvk == true }}
         name: Setup MoltenVK on macOS
         run: |
           echo "VK_ICD_FILENAMES=$HOME/vulkan-sdk/vulkansdk-macos-1.3.250.1/macOS/share/vulkan/icd.d/MoltenVK_icd.json" >> $GITHUB_ENV
-      
+
       - name: Install SwiftShader
         if: ${{ matrix.use_swiftshader == true || runner.os == 'Linux' || runner.os == 'Windows' }}
         env:
@@ -117,47 +117,53 @@ jobs:
             rm -rf temp-ss-dl/
             echo "VK_ICD_FILENAMES=$SWIFTSHADER_DEST_DIR\vk_swiftshader_icd.json" >> $GITHUB_ENV
           fi
-      
+
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.x'
-      
+          python-version: "3.x"
+
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
-      
+
       - name: Install nightly toolchain for cargo-gpu
         shell: bash
         run: |
           # cargo-gpu will auto-install its required toolchain version
           # but we need a base nightly toolchain
           rustup toolchain install nightly
           rustup component add rust-src rustc-dev llvm-tools --toolchain nightly
-      
+
       - name: Install cargo-gpu
         shell: bash
         env:
           RUST_LOG: debug
         run: |
           # Install cargo-gpu with locked dependencies
           cargo install --git https://github.com/rust-gpu/cargo-gpu cargo-gpu --locked
-      
+
       - name: Cache cargo registry
         uses: actions/cache@v3
         with:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-      
+
       - name: Set Windows PATH
         if: runner.os == 'Windows'
         run: echo "$env:USERPROFILE\.cargo\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
+      - name: Check Rust shader formatting
+        working-directory: shaders/rust
+        run: |
+          rustup component add rustfmt
+          cargo fmt --all --check
+
       - name: Compile shaders to SPIR-V
         working-directory: shaders/rust
         run: python3 compileshaders.py
-      
+
       - name: Verify no uncommitted changes
         shell: bash
         run: |
@@ -168,7 +174,7 @@ jobs:
             git diff --name-only
             exit 1
           fi
-          
+
           # Check for untracked files
           if [ -n "$(git ls-files --others --exclude-standard)" ]; then
             echo "Error: New untracked files were generated"