ci: cache xmake packages and bump action versions

Add actions/cache step covering xmake package and repository directories on both Linux and Windows runners. Cache key is keyed by runner OS, build mode (coverage on Linux, release on Windows) and the hashes of root and examples xmake-requires.lock so coverage and release artifacts do not pollute each other and examples deps share the same cache.

Bump actions/checkout to v4 with submodules: recursive (replacing the manual submodule update step), upload-artifact to v4 and download-artifact to v4.

Author: lc-soft

.github/workflows/ccpp.yml

@@ -14,15 +14,26 @@ jobs:
     runs-on: ${{ matrix.os }}
     name: "Builds binaries on ${{ matrix.os }}"
     steps:
-      - uses: actions/checkout@v1
-    
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
       - uses: xmake-io/github-action-setup-xmake@v1
         with:
           xmake-version: branch@dev
 
-      - name: Update git submodule
-        run: |
-          git submodule update --init
+      - name: Cache xmake packages
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.xmake/packages
+            ~/.xmake/repositories
+            ~/AppData/Local/.xmake/packages
+            ~/AppData/Local/.xmake/repositories
+          key: ${{ runner.os }}-xmake-${{ runner.os == 'Linux' && 'coverage' || 'release' }}-${{ hashFiles('xmake-requires.lock', 'examples/xmake-requires.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-xmake-${{ runner.os == 'Linux' && 'coverage' || 'release' }}-
+            ${{ runner.os }}-xmake-
 
       - name: Install tools
         if: runner.os == 'Linux'
@@ -80,13 +91,13 @@ jobs:
           mv ../dist/lcui-examples/bin/* ../dist/lcui-examples/
           rm -r ../dist/lcui-examples/bin
 
-      - uses: actions/upload-artifact@master
+      - uses: actions/upload-artifact@v4
         with:
           name: lcui${{ env.TARGET_MAJOR }}-${{ env.TARGET_VERSION }}-${{ env.TARGET_KIND }} (${{ runner.os }})
           path: |
             dist/lcui-package
 
-      - uses: actions/upload-artifact@master
+      - uses: actions/upload-artifact@v4
         with:
           name: lcui${{ env.TARGET_MAJOR }}-examples (${{ runner.os }})
           path: |
@@ -100,10 +111,10 @@ jobs:
       ARTIFACT_DIR: ./release
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: ${{ env.ARTIFACT_DIR }}