diff --git a/pub.sh b/pub.sh
new file mode 100755
index 0000000..bd181f8
--- /dev/null
+++ b/pub.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+set -e
+
+BASE_URL=${MIRROR_BASE_URL:-"https://mirrors.tuna.tsinghua.edu.cn/dart-pub"}
+UPSTREAM_URL=${TUNASYNC_UPSTREAM_URL:-"https://pub.dartlang.org/api"}
+
+/root/.pub-cache/bin/pub_mirror --upstream $UPSTREAM_URL --verbose --connections 10 --concurrency 100 "$TUNASYNC_WORKING_DIR" "$BASE_URL"