From 420a7792d0daffdb644b58164caf57e48c37d435 Mon Sep 17 00:00:00 2001
From: Tonye Jack <jtonye@ymail.com>
Date: Tue, 8 Nov 2022 11:06:06 -0700
Subject: [PATCH] fix: bug with force pushing commits to pr branches

---
 diff-sha.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff-sha.sh b/diff-sha.sh
index 3029cdda..aafddb34 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -198,10 +198,10 @@ else
 
   if [[ -z $INPUT_BASE_SHA ]]; then
     if [[ "$INPUT_SINCE_LAST_REMOTE_COMMIT" == "true" ]]; then
-      PREVIOUS_SHA=""
+      PREVIOUS_SHA=$GITHUB_EVENT_BEFORE
 
-      if [[ "$GITHUB_EVENT_FORCED" == "false" || -z "$GITHUB_EVENT_FORCED" ]]; then
-        PREVIOUS_SHA=$GITHUB_EVENT_BEFORE
+      if ! git rev-parse --quiet --verify "$PREVIOUS_SHA^{commit}" 1>/dev/null 2>&1; then
+        PREVIOUS_SHA=$(git rev-list -n 1 "$TARGET_BRANCH" 2>&1) && exit_status=$? || exit_status=$?
       fi
 
       if [[ -z "$PREVIOUS_SHA" || "$PREVIOUS_SHA" == "0000000000000000000000000000000000000000" ]]; then