build: add cache and fix artifact

.github/workflows/build.yml

@@ -17,23 +17,39 @@ jobs:
       with:
         submodules: recursive
 
+    - name: Setup Tools Cache
+      id: tools-cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          cmake-3.30.5-linux-x86_64
+          ccache
+        key: ${{ runner.os }}-tools-${{ hashFiles('**/CMakeLists.txt') }}
+
     - name: Install tools
       run: |
         sudo apt-get update
-        sudo apt-get install -y mingw-w64 zstd dotnet-sdk-8.0
+        sudo apt-get install -y mingw-w64 zstd ccache zip
+        mkdir -p ccache
+        echo "CCACHE_DIR=$GITHUB_WORKSPACE/ccache" >> $GITHUB_ENV
 
     - name: Install CMake 3.30
+      if: steps.tools-cache.outputs.cache-hit != 'true'
       run: |
         wget -q https://github.com/Kitware/CMake/releases/download/v3.30.5/cmake-3.30.5-linux-x86_64.tar.gz
         tar xzf cmake-3.30.5-linux-x86_64.tar.gz
-        echo "$GITHUB_WORKSPACE/cmake-3.30.5-linux-x86_64/bin" >> $GITHUB_PATH
+
+    - name: Add CMake to path
+      run: echo "$GITHUB_WORKSPACE/cmake-3.30.5-linux-x86_64/bin" >> $GITHUB_PATH
 
     - name: Get OpenSSL for MinGW (pre-built from MSYS2)
       run: |
+        if [ ! -d "/usr/x86_64-w64-mingw32/include/openssl" ]; then
           wget -q "https://repo.msys2.org/mingw/mingw64/mingw-w64-x86_64-openssl-3.3.2-1-any.pkg.tar.zst"
           tar xf mingw-w64-x86_64-openssl-3.3.2-1-any.pkg.tar.zst
           sudo cp -r mingw64/include/openssl /usr/x86_64-w64-mingw32/include/
           sudo cp mingw64/lib/libssl.a mingw64/lib/libcrypto.a /usr/x86_64-w64-mingw32/lib/
+        fi
 
     - name: Patch missing MinGW headers
       run: |
@@ -48,6 +64,8 @@ jobs:
           -DCMAKE_C_COMPILER=x86_64-w64-mingw32-gcc \
           -DCMAKE_CXX_COMPILER=x86_64-w64-mingw32-g++ \
           -DCMAKE_RC_COMPILER=x86_64-w64-mingw32-windres \
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
           -DOPENSSL_ROOT_DIR=/usr/x86_64-w64-mingw32 \
           -DOPENSSL_INCLUDE_DIR=/usr/x86_64-w64-mingw32/include \
           -DOPENSSL_LIBRARIES="/usr/x86_64-w64-mingw32/lib/libssl.a;/usr/x86_64-w64-mingw32/lib/libcrypto.a"