添加 .github/diy/sync.sh

Signed-off-by: zhao <zj18139624826@gmail.com>

.github/diy/sync.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Git 稀疏克隆 OpenWrt rockchip 内容到【当前目录】
+git_sparse_clone() {
+  branch="$1"
+  repourl="$2"
+  sparse_path="$3"
+
+  git clone \
+    --depth=1 \
+    -b "$branch" \
+    --single-branch \
+    --filter=blob:none \
+    --sparse \
+    "$repourl"
+
+  repodir="$(basename "$repourl" .git)"
+  cd "$repodir" || exit 1
+
+  git sparse-checkout set "$sparse_path"
+
+  # 把 rockchip 目录里的内容直接移到外面的当前目录
+  mv "$sparse_path"/* ../
+  mv "$sparse_path"/.[!.]* ../ 2>/dev/null || true
+  mv "$sparse_path"/..?* ../ 2>/dev/null || true
+
+  cd ..
+  rm -rf "$repodir"
+}
+
+git_sparse_clone openwrt-25.12 https://github.com/openwrt/openwrt.git target/linux/x86