ensure rev sync

bin/apply

@@ -6,10 +6,35 @@ ROOT="$(dirname "$SCRIPT_DIR")"
 SING_BOX="$ROOT/works/sing-box"
 PATCH_DIR="$ROOT/works/patch"
 OUTPUT="$ROOT/works/core"
+REV_FILE="$ROOT/works/rev"
 
+# defaults
+REPO_URL="git@git.inker.bot:arknights/sing-box.git"
+UPSTREAM_BRANCH="main"
+
+CONFIG="$ROOT/works/config"
+if [ -f "$CONFIG" ]; then
+    . "$CONFIG"
+fi
+
+# Clone if not present
 if [ ! -d "$SING_BOX/.git" ]; then
-    echo "Error: works/sing-box not found. Run update first." >&2
-    exit 1
+    echo "Cloning sing-box..."
+    if [ -n "$UPSTREAM_BRANCH" ]; then
+        git clone -b "$UPSTREAM_BRANCH" "$REPO_URL" "$SING_BOX"
+    else
+        git clone "$REPO_URL" "$SING_BOX"
+    fi
+fi
+
+# Checkout stored rev
+if [ -f "$REV_FILE" ]; then
+    REV="$(cat "$REV_FILE" | tr -d '[:space:]')"
+    echo "Checking out stored rev: $REV"
+    git -C "$SING_BOX" fetch --all
+    git -C "$SING_BOX" checkout "$REV"
+else
+    echo "Warning: works/rev not found, using current HEAD." >&2
 fi
 
 echo "Initializing works/core/..."