[llvm-branch-commits] [llvm] release/22.x: [CI] Make premerge jobs support GHA postcommit (#176180) (PR #176196)

[via llvm-branch-commits]

https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/176196

Backport 5acb608b5265b37b2c5dbd5a1699c3d129935d95

Requested by: @boomanaiden154

>From f6de3be2ae6e9aeb33c46e6b96ae7ded60e194d2 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Thu, 15 Jan 2026 08:16:39 -0800
Subject: [PATCH] [CI] Make premerge jobs support GHA postcommit (#176180)

This was causing failures in the release branch as the premerge jobs
there are also run postcommit through GHA. We were expecting a PR number
to always be present when it was not.

(cherry picked from commit 5acb608b5265b37b2c5dbd5a1699c3d129935d95)
---
 .ci/utils.sh | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/.ci/utils.sh b/.ci/utils.sh
index 923c64a4e169c..f14fe753415ce 100644
--- a/.ci/utils.sh
+++ b/.ci/utils.sh
@@ -37,11 +37,15 @@ function at-exit {
     python "${MONOREPO_ROOT}"/.ci/generate_test_report_github.py \
       $retcode "${BUILD_DIR}"/test-results.*.xml "${MONOREPO_ROOT}"/ninja*.log \
       >> $GITHUB_STEP_SUMMARY
-    (python "${MONOREPO_ROOT}"/.ci/premerge_advisor_explain.py \
-      $(git rev-parse HEAD~1) $retcode "${GITHUB_TOKEN}" \
-      $GITHUB_PR_NUMBER "${BUILD_DIR}"/test-results.*.xml \
-      "${MONOREPO_ROOT}"/ninja*.log)
-    advisor_retcode=$?
+    if [[ -n "$GITHUB_PR_NUMBER" ]]; then
+      (python "${MONOREPO_ROOT}"/.ci/premerge_advisor_explain.py \
+        $(git rev-parse HEAD~1) $retcode "${GITHUB_TOKEN}" \
+        $GITHUB_PR_NUMBER "${BUILD_DIR}"/test-results.*.xml \
+        "${MONOREPO_ROOT}"/ninja*.log)
+      advisor_retcode=$?
+    else
+      advisor_retcode=$retcode
+    fi
   fi
 
   if [[ "$retcode" != "0" ]]; then