add retry build.

.github/workflows/macos.yml

@@ -9,26 +9,51 @@ on:
 jobs:
   build:
     runs-on: macos-latest
+    strategy:
+      fail-fast: false
     
     steps:
     - uses: actions/checkout@v4
+
     - name: Setup build directory
       run: mkdir buildproducts
-      
+
     - name: CMake
       working-directory: ./buildproducts
-      run: cmake ..
-      
+      run: |
+        retry=0
+        max_retries=3
+        until cmake ..; do
+          ((retry++))
+          echo "Retry $retry/$max_retries..."
+          if [ "$retry" -ge "$max_retries" ]; then
+            echo "CMake configuration failed after $max_retries attempts."
+            exit 1
+          fi
+          sleep 10
+        done
+
     - name: Make
       working-directory: ./buildproducts
-      run: make
-      
+      run: |
+        retry=0
+        max_retries=3
+        until make; do
+          ((retry++))
+          echo "Retry $retry/$max_retries..."
+          if [ "$retry" -ge "$max_retries" ]; then
+            echo "Make build failed after $max_retries attempts."
+            exit 1
+          fi
+          sleep 10
+        done
+
     - name: Copy header files to build directory
       run: |
         cp include/epanet2.h buildproducts/
         cp include/epanet2_2.h buildproducts/
         cp include/epanet2_enums.h buildproducts/
-        
+
     - uses: actions/upload-artifact@v4
       with:
         name: libepanet-output