Caching etc

Author: d-e-s-o

.github/workflows/build-kernel.yml

@@ -8,16 +8,25 @@ jobs:
     name: Build Linux
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/checkout@v4
+      - uses: actions/cache/restore@v4
+        id: restore-cached-kernel
+        with:
+          path: data/build/arch/x86/boot/bzImage
+          key: linux-kernel
+      - if: steps.restore-cached-kernel.outputs.cache-hit != 'true'
+        uses: actions/checkout@v4
+      - if: steps.restore-cached-kernel.outputs.cache-hit != 'true'
+        uses: actions/checkout@v4
         with:
           repository: 'torvalds/linux'
           ref: v6.6
           fetch-depth: 1
           path: linux/
-      - name: Install required tools
+      - if: steps.restore-cached-kernel.outputs.cache-hit != 'true'
+        name: Install required tools
         run: sudo apt-get install -y libelf-dev
-      - name: Build kernel
+      - if: steps.restore-cached-kernel.outputs.cache-hit != 'true'
+        name: Build kernel
         run: |
           config=$(readlink --canonicalize-existing data/config)
           build=$(pwd)/build/
@@ -33,7 +42,13 @@ jobs:
           echo "::endgroup::"
 
           make O="${KBUILD_OUTPUT}" -j8
+      - if: steps.restore-cached-kernel.outputs.cache-hit != 'true'
+        uses: actions/cache/save@v4
+        with:
+          path: data/build/arch/x86/boot/bzImage
+          key: linux-kernel
       - uses: actions/upload-artifact@v4
         with:
-          name: kernel
-          path: data/build/arch/x86_64/boot/bzImage
+          name: linux-kernel-image
+          if-no-files-found: error
+          path: data/build/arch/x86/boot/bzImage