Skip cached Alpine package rebuilds in CI

.gitea/workflows/build.yml

@@ -30,6 +30,7 @@ jobs:
       PACKAGE_USER: "${{ secrets.PACKAGE_USER }}"
       PACKAGE_TOKEN: "${{ secrets.PACKAGE_TOKEN }}"
       PACKAGER: "Joachim Schlöffel <me@joachim-schloeffel.com>"
+      ALPINE_APK_REPO_CACHE: "/cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}/apk-repo"
       CARGO_HOME: "/cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}/greptimedb/cargo"
       RUSTUP_HOME: "/cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}/greptimedb/rustup"
       CARGO_TARGET_DIR: "/cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}/greptimedb/target"
@@ -37,17 +38,22 @@ jobs:
       - name: Prepare Environment
         run: |
           apk add --no-cache --update abuild-rootbld alpine-sdk atools-apkbuild-lint bash ca-certificates curl doas git nodejs sudo tar
-          mkdir -p "$CARGO_HOME" "$RUSTUP_HOME" "$CARGO_TARGET_DIR"
-          chown 1000:1000 /cache /cache/public-alpine-packages /cache/public-alpine-packages/${{ matrix.alpine_registry_branch }} /cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}/greptimedb "$CARGO_HOME" "$RUSTUP_HOME" "$CARGO_TARGET_DIR"
+          mkdir -p "$ALPINE_APK_REPO_CACHE" "$CARGO_HOME" "$RUSTUP_HOME" "$CARGO_TARGET_DIR"
+          chown -R 1000:1000 /cache/public-alpine-packages/${{ matrix.alpine_registry_branch }}
 
       - name: Checkout
         uses: actions/checkout@v3
 
-      - name: Build packages
+      - name: Select packages
         run: |
           scripts/apk/clean.sh
           find packaging/alpine/local -mindepth 2 -maxdepth 2 -name APKBUILD -exec apkbuild-lint {} +
+          scripts/apk/ci-package-cache.sh prepare
+
+      - name: Build packages
+        run: |
           scripts/apk/ci-build.sh
+          scripts/apk/ci-package-cache.sh sync
           scripts/apk/export-ci-assets.sh
           scripts/apk/list-packages.sh