enable ccache for windows

Signed-off-by: Csaba Kiraly <[email protected]>

.github/actions/nimbus-build-system/action.yml

@@ -97,6 +97,31 @@ runs:
         # Set GCC-14 as the default
         sudo update-alternatives --set gcc /usr/bin/gcc-14
 
+    - name: Install ccache on Linux/Mac
+      if: inputs.os == 'linux' || inputs.os == 'macos'
+      uses: hendrikmuhs/[email protected]
+      with:
+        create-symlink: true
+        key: ${{ matrix.os }}-${{ matrix.builder }}-${{ matrix.cpu }}-${{ matrix.tests }}-${{ matrix.nim_version }}
+
+    - name: Install ccache on Windows
+      if: inputs.os == 'windows'
+      uses: hendrikmuhs/[email protected]
+      with:
+        key: ${{ matrix.os }}-${{ matrix.builder }}-${{ matrix.cpu }}-${{ matrix.tests }}-${{ matrix.nim_version }}
+
+    - name: Enable ccache on Windows
+      if: inputs.os == 'windows'
+      shell: ${{ inputs.shell }} {0}
+      run: |
+        CCACHED_DIR=$(dirname $(which ccache))/ccached
+        mkdir ${CCACHED_DIR}
+        ln -s $(which ccache) ${CCACHE_DIR}/gcc.exe
+        ln -s $(which ccache) ${CCACHE_DIR}/g++.exe
+        ln -s $(which ccache) ${CCACHE_DIR}/cc.exe
+        ln -s $(which ccache) ${CCACHE_DIR}/c++.exe
+        echo "export PATH=${CCACHE_DIR}:\$PATH" >> $HOME/.bash_profile # prefix path in MSYS2
+
     - name: Derive environment variables
       shell: ${{ inputs.shell }} {0}
       run: |
@@ -194,6 +219,7 @@ runs:
     - name: Build Nim and Codex dependencies
       shell: ${{ inputs.shell }} {0}
       run: |
+        which gcc
         gcc --version
         make -j${ncpu} CI_CACHE=NimBinaries ${ARCH_OVERRIDE} QUICK_AND_DIRTY_COMPILER=1 update
         echo

.github/workflows/ci-reusable.yml

@@ -34,13 +34,6 @@ jobs:
           submodules: recursive
           ref: ${{ github.event.pull_request.head.sha }}
 
-      - name: ccache
-        uses: hendrikmuhs/[email protected]
-        if: matrix.os == 'linux' || matrix.os == 'macos'
-        with:
-          create-symlink: true
-          key: ${{ matrix.os }}-${{ matrix.builder }}-${{ matrix.cpu }}-${{ matrix.tests }}-${{ matrix.nim_version }}
-
       - name: Setup Nimbus Build System
         uses: ./.github/actions/nimbus-build-system
         with: