diff --git a/freighter.sh b/freighter.sh
new file mode 100755
index 0000000..b029d52
--- /dev/null
+++ b/freighter.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+FREIGHTER=${FREIGHTER:-"/usr/local/cargo/bin/freighter-registry"}
+CRATES_UPSTREAM="https://static.crates.io/crates"
+INDEX_UPSTREAM="https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"
+TUNASYNC_UPSTREAM=${TUNASYNC_UPSTREAM_URL:-$CRATES_UPSTREAM}
+TUNASYNC_UPSTREAM=${TUNASYNC_UPSTREAM%/}
+CONF="$TUNASYNC_WORKING_DIR/config.toml"
+INIT=${INIT:-"0"}
+
+if [ ! -d "$TUNASYNC_WORKING_DIR" ]; then
+	mkdir -p $TUNASYNC_WORKING_DIR
+	INIT="1"
+elif [ -d "$TUNASYNC_WORKING_DIR/crates" ]; then
+	INIT="1"
+fi
+
+echo "Syncing to $TUNASYNC_WORKING_DIR"
+
+cat > $CONF << EOF
+[log]
+# see https://docs.rs/log4rs/1.2.0/log4rs/append/file/struct.FileAppenderDeserializer.html#configuration
+encoder = "{d}:{l} - {m}{n}"
+# unit is MB
+limit = 100
+level = "info"
+[crates]
+index_domain = "$INDEX_UPSTREAM"
+domain = "$CRATES_UPSTREAM"
+download_threads = 16
+serve_domains = [
+    "localhost",
+    ]
+[proxy]
+enable = false
+# git_index_proxy = "127.0.0.1:6780"
+# download_proxy = "127.0.0.1:6780"
+EOF
+
+if [[ $INIT == "0" ]]; then
+	$FREIGHTER -c $TUNASYNC_WORKING_DIR crates pull
+	exec $FREIGHTER -c $TUNASYNC_WORKING_DIR crates download
+else
+	$FREIGHTER -c $TUNASYNC_WORKING_DIR crates pull
+	exec $FREIGHTER -c $TUNASYNC_WORKING_DIR crates download --init
+fi