From 7bd3abd67b2443263ca04c1416bb4ee6228e3048 Mon Sep 17 00:00:00 2001
From: Yakun Xu <xyk@google.com>
Date: Sat, 11 Jan 2025 01:41:56 +0800
Subject: [PATCH] [script] allow specify old commit for check-size (#11147)

---
 script/check-size | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/script/check-size b/script/check-size
index 37cc6a9a6cd..ef155157d45 100755
--- a/script/check-size
+++ b/script/check-size
@@ -35,7 +35,7 @@ readonly OT_TMP_DIR
 OT_SHA_NEW=${GITHUB_SHA:-$(git rev-parse HEAD)}
 readonly OT_SHA_NEW
 
-OT_SHA_OLD="$(git cat-file -p "${OT_SHA_NEW}" | grep 'parent ' | head -n1 | cut -d' ' -f2)"
+OT_SHA_OLD="${OT_SHA_OLD:-$(git cat-file -p "${OT_SHA_NEW}" | grep 'parent ' | head -n1 | cut -d' ' -f2)}"
 readonly OT_SHA_OLD
 
 OT_REPORT_FILE_TABLE="${OT_TMP_DIR}/report_table"