fixup! Improve CI caching

Author: ImSapphire

.github/workflows/c-cpp.yml

@@ -39,13 +39,15 @@ jobs:
       with:
         submodules: true
 
+    - name: Get submodule commit hashes
+      id: get-submodule-commit-hashes
+      run: git submodule foreach --recursive git rev-parse HEAD > submodule-hashes.txt
+
     - name: Generate cache key
       id: gen-cache-key
       shell: bash
       run: |
-        git submodule foreach --recursive git rev-parse HEAD > submodule_hashes.txt
-        echo "cache-key=${{ matrix.os }}-$(sha256sum submodule_hashes.txt)-${{ hashFiles('CMakeLists.txt') }}" >> $GITHUB_OUTPUT
-        rm submodule_hashes.txt
+        echo "cache-key=${{ matrix.os }}-${{ hashFiles('submodule-hashes.txt') }}-${{ hashFiles('CMakeLists.txt') }}" >> $GITHUB_OUTPUT
 
     - name: Set up CPM cache
       id: setup-cpm-cache
@@ -68,11 +70,11 @@ jobs:
       shell: cmd
       run: |
         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
-        cmake -S "${{ github.workspace }}" -B "${{ env.CMAKE_BUILD_DIR }}" -G Ninja \
-          -DCPM_SOURCE_CACHE=%USERPROFILE%\cpm-cache                                \
-          -DCMAKE_C_COMPILER_LAUNCHER=ccache                                        \
-          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache                                      \
-          -DSLIMEVR_BUILD_TESTS=ON                                                  \
+        cmake -S "${{ github.workspace }}" -B "${{ env.CMAKE_BUILD_DIR }}" -G Ninja ^
+          -DCPM_SOURCE_CACHE=%USERPROFILE%\cpm-cache                                ^
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache                                        ^
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache                                      ^
+          -DSLIMEVR_BUILD_TESTS=ON                                                  ^
           -DCMAKE_BUILD_TYPE=Release
         cmake --build "${{ env.CMAKE_BUILD_DIR }}" --config Release -j6