From 480b5a27ae1cd36ef578f233f5ca26ac51bbea7e Mon Sep 17 00:00:00 2001
From: Aolin <aolin.zhang@pingcap.com>
Date: Thu, 7 May 2026 21:51:49 +0800
Subject: [PATCH] ci: fall back to GITHUB_REF_NAME when GITHUB_BASE_REF is
 empty

---
 .github/workflows/keywords.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/keywords.yaml b/.github/workflows/keywords.yaml
index 1f7e8af647aba..0d686b39807f1 100644
--- a/.github/workflows/keywords.yaml
+++ b/.github/workflows/keywords.yaml
@@ -12,6 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - run: |
+          REF="${GITHUB_BASE_REF:-$GITHUB_REF_NAME}"
           ./scripts/check-keywords.py \
           --download_from_url \
-          --parser_url https://github.com/pingcap/tidb/raw/refs/heads/${GITHUB_BASE_REF}/pkg/parser/parser.y
+          --parser_url "https://github.com/pingcap/tidb/raw/refs/heads/${REF}/pkg/parser/parser.y"