auto install ninja-build if generator is using Ninja

.github/workflows/test.yml

@@ -79,9 +79,6 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3.3.0
 
-      - name: Install Ninja
-        run: sudo apt install -y ninja-build
-
       - name: Use this action with specified generator
         uses: ./
         with:

action.yml

@@ -48,6 +48,11 @@ runs:
         echo "CMAKE_CONFIGURE_ARGS=${CONFIGURE_ARGS//[$'\t\r\n']}" >> $GITHUB_ENV
         echo "CMAKE_BUILD_ARGS=${BUILD_ARGS//[$'\t\r\n']}" >> $GITHUB_ENV
 
+    - name: Install Ninja
+      if: ${{ inputs.generator == 'Ninja' }}
+      shell: bash
+      run: sudo apt install -y ninja-build
+
     - name: Configure CMake
       shell: bash
       run: cmake ${{ env.CMAKE_CONFIGURE_ARGS }}