diff --git a/.drone.yml b/.drone.yml
index 601b634..081ded4 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -58,12 +58,20 @@ steps:
       IMAGE_NAME: swr.cn-north-4.myhuaweicloud.com/colovu/scratch
     commands:
       - |
-        if [ -n "$DRONE_TAG" ]; then
+        if [ -n "${DRONE_TAG:-}" ]; then
           IMAGE_TAG="$DRONE_TAG"
         else
-          IMAGE_TAG="$DRONE_COMMIT_SHA"
+          IMAGE_TAG="${DRONE_COMMIT_SHA:0:8:-unknown}"
         fi
         
+        # 调试：打印所有关键变量
+        echo "=== Debug Variables ==="
+        echo "DRONE_TAG: ${DRONE_TAG:-empty}"
+        echo "DRONE_COMMIT_SHA: ${DRONE_COMMIT_SHA:-empty}"
+        echo "DRONE_BRANCH: ${DRONE_BRANCH:-empty}"
+        echo "IMAGE_NAME: ${IMAGE_NAME:-empty}"
+        echo "========================"
+        
         echo "Building image..."
         podman build \
             --tag "${IMAGE_NAME}:${IMAGE_TAG}" \