ci: spilt make rootfs tarball to prepare

Signed-off-by: Han Gao <[email protected]>

.github/workflows/build.yml

@@ -56,6 +56,22 @@ jobs:
           name: qemu-riscv64-static-ci
           path: /usr/bin/qemu-riscv64-static
 
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+        with:
+          path: 'mkimg-th1520'  # TODO: make this name a global variable
+
+      - name: Make rootfs tarball
+        run: |
+              pushd mkimg-th1520
+                sudo -E ./mkrootfs.sh rootfs common_revyos_rootfs.tar.xz
+              popd
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: common_revyos_rootfs
+          path: common_revyos_rootfs.tar.xz
+
   mkrootfs:
     needs: prepare
     strategy:
@@ -108,6 +124,7 @@ jobs:
               sudo chmod a+x /usr/bin/qemu-riscv64-static
               ls -al /usr/bin/qemu-riscv64-static
               sudo dpkg-reconfigure binfmt-support
+              echo "USE_TARBALL=${ARTIFACTS_DIR}/common_revyos_rootfs/common_revyos_rootfs.tar.xz" >> $GITHUB_ENV
 
       - name: Checkout Repo
         uses: actions/checkout@v4