Cache rust builds on CI

Author: martpie

.github/workflows/build.yml

@@ -31,6 +31,10 @@ jobs:
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable
 
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+
       - name: Install native dependencies
         run: |
           sudo apt-get update
@@ -104,6 +108,10 @@ jobs:
           # Those targets are only used on macos runners so it's in an `if` to slightly speed up windows and linux builds.
           targets: ${{ matrix.platform == 'macos-14' && 'aarch64-apple-darwin,x86_64-apple-darwin' || '' }}
 
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+
       - name: Install native dependencies (ubuntu only)
         if: startsWith(matrix.platform, 'ubuntu')
         run: |