ci : only save ccache on master (#18207)

.github/workflows/build.yml

@@ -70,6 +70,7 @@ jobs:
         with:
           key: macOS-latest-cmake-arm64
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -106,6 +107,7 @@ jobs:
         with:
           key: macOS-latest-cmake-x64
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -142,6 +144,7 @@ jobs:
         with:
           key: macOS-latest-cmake-arm64-webgpu
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dawn Dependency
         id: dawn-depends
@@ -195,6 +198,7 @@ jobs:
         with:
           key: ubuntu-cpu-cmake-${{ matrix.build }}
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build Dependencies
         id: build_depends
@@ -276,6 +280,7 @@ jobs:
         with:
           key: ubuntu-latest-cmake-sanitizer-${{ matrix.sanitizer }}
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -396,6 +401,7 @@ jobs:
         with:
           key: ubuntu-24-cmake-vulkan-deb
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -431,6 +437,7 @@ jobs:
         with:
           key: ubuntu-24-cmake-vulkan
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -490,6 +497,7 @@ jobs:
         with:
           key: ubuntu-24-cmake-webgpu
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -562,6 +570,7 @@ jobs:
         with:
           key: ubuntu-latest-wasm-webgpu
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Install Emscripten
         run: |
@@ -609,6 +618,7 @@ jobs:
         with:
           key: ubuntu-22-cmake-hip
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build with native CMake HIP support
         id: cmake_build
@@ -641,6 +651,7 @@ jobs:
         with:
           key: ubuntu-22-cmake-musa
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build with native CMake MUSA support
         id: cmake_build
@@ -688,6 +699,7 @@ jobs:
         with:
           key: ubuntu-22-cmake-sycl
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -738,6 +750,7 @@ jobs:
         with:
           key: ubuntu-22-cmake-sycl-fp16
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -771,6 +784,7 @@ jobs:
         with:
           key: macOS-latest-cmake-ios
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -802,6 +816,7 @@ jobs:
         with:
           key: macOS-latest-cmake-tvos
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -863,6 +878,7 @@ jobs:
         with:
           key: macOS-latest-swift
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Download xcframework artifact
         uses: actions/download-artifact@v4
@@ -905,6 +921,7 @@ jobs:
           key: windows-msys2
           variant: ccache
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Setup ${{ matrix.sys }}
         uses: msys2/setup-msys2@v2
@@ -973,6 +990,7 @@ jobs:
           key: windows-latest-cmake-${{ matrix.build }}
           variant: ccache
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Download OpenBLAS
         id: get_openblas
@@ -1077,6 +1095,7 @@ jobs:
           with:
             key: ubuntu-latest-cmake-cuda
             evict-old-files: 1d
+            save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
         - name: Build with CMake
           run: |
@@ -1109,6 +1128,7 @@ jobs:
           key: windows-cuda-${{ matrix.cuda }}
           variant: ccache
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Install Cuda Toolkit
         uses: ./.github/actions/windows-setup-cuda
@@ -1160,6 +1180,7 @@ jobs:
           key: windows-latest-cmake-sycl
           variant: ccache
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Install
         run:  |
@@ -1221,6 +1242,7 @@ jobs:
         with:
           key: ${{ github.job }}
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Build
         id: cmake_build
@@ -1466,6 +1488,7 @@ jobs:
         with:
           key: ggml-ci-x64-cpu-low-perf
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -1491,6 +1514,7 @@ jobs:
         with:
           key: ggml-ci-arm64-cpu-low-perf
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -1516,6 +1540,7 @@ jobs:
         with:
           key: ggml-ci-x64-cpu-high-perf
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -1541,6 +1566,7 @@ jobs:
         with:
           key: ggml-ci-arm64-cpu-high-perf
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -1566,6 +1592,7 @@ jobs:
         with:
           key: ggml-ci-arm64-cpu-high-perf-sve
           evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
       - name: Dependencies
         id: depends
@@ -1701,6 +1728,7 @@ jobs:
          with:
            key: ggml-ci-arm64-cpu-kleidiai
            evict-old-files: 1d
+           save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
        - name: Dependencies
          id: depends
@@ -2084,6 +2112,7 @@ jobs:
          with:
            key: ggml-ci-arm64-graviton4-kleidiai
            evict-old-files: 1d
+           save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
 
        - name: Test
          id: ggml-ci