[llvm] [premerge] Route macOS build through a monolithic script to enable Job Summary (PR #211565)

[Arseniy Obolenskiy via llvm-commits]

https://github.com/aobolensk created https://github.com/llvm/llvm-project/pull/211565

The macOS premerge job built inline instead of via a `monolithic-*.sh` script, so it never emitted a GitHub Job Summary or JUnit XML like Linux/Windows do on failure

>From 25c5488df72122bb808d59c2c34641379cc4b446 Mon Sep 17 00:00:00 2001
From: Arseniy Obolenskiy <arseniy.obolenskiy at amd.com>
Date: Thu, 23 Jul 2026 16:22:27 +0200
Subject: [PATCH] [premerge] Route macOS build through a monolithic script to
 enable Job Summary

The macOS premerge job built inline instead of via a monolithic-*.sh script, so it never emitted a GitHub Job Summary or JUnit XML like Linux/Windows do on failure
---
 .ci/monolithic-macos.sh         | 40 +++++++++++++++++++++++++++++++++
 .github/workflows/premerge.yaml | 23 +++----------------
 2 files changed, 43 insertions(+), 20 deletions(-)
 create mode 100755 .ci/monolithic-macos.sh

diff --git a/.ci/monolithic-macos.sh b/.ci/monolithic-macos.sh
new file mode 100755
index 0000000000000..37f20610440f6
--- /dev/null
+++ b/.ci/monolithic-macos.sh
@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+#===----------------------------------------------------------------------===##
+#
+# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+#===----------------------------------------------------------------------===##
+
+#
+# This script performs a monolithic build of the monorepo and runs the tests of
+# most projects on macOS. This should be replaced by per-project scripts that
+# run only the relevant tests.
+#
+
+source .ci/utils.sh
+
+projects="${1}"
+targets="${2}"
+
+start-group "CMake"
+
+xcrun cmake -G Ninja \
+      -B "${BUILD_DIR}" \
+      -S "${MONOREPO_ROOT}"/llvm \
+      -D LLVM_ENABLE_PROJECTS="${projects}" \
+      -D LLVM_DISABLE_ASSEMBLY_FILES=ON \
+      -D CMAKE_BUILD_TYPE=Release \
+      -D LLDB_INCLUDE_TESTS=OFF \
+      -D LLVM_ENABLE_ASSERTIONS=ON \
+      -D LLVM_LIT_ARGS="-v --xunit-xml-output ${BUILD_DIR}/test-results.xml --use-unique-output-file-name --timeout=1200 --time-tests --succinct" \
+      -D CMAKE_C_COMPILER_LAUNCHER=sccache \
+      -D CMAKE_CXX_COMPILER_LAUNCHER=sccache
+
+start-group "ninja"
+
+if [[ -n "${targets}" ]]; then
+  ninja -C "${BUILD_DIR}" ${targets} |& tee ninja.log
+  cp ${BUILD_DIR}/.ninja_log ninja.ninja_log
+fi
diff --git a/.github/workflows/premerge.yaml b/.github/workflows/premerge.yaml
index e1ef62ed3904c..5cae95ce9300e 100644
--- a/.github/workflows/premerge.yaml
+++ b/.github/workflows/premerge.yaml
@@ -287,32 +287,15 @@ jobs:
         env:
           SCCACHE_BUCKET: sccache-bucket
           SCCACHE_REGION: us-west-2
-          PROJECTS: ${{ needs.premerge-compute-macos.outputs.macos-projects }}
-          CHECK_TARGETS: ${{ needs.premerge-compute-macos.outputs.macos-check-targets }}
           CLANG_TOOLCHAIN_PROGRAM_TIMEOUT: 120
+          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}
         run: |
           export SCCACHE_IDLE_TIMEOUT=0
           mkdir -p artifacts
           SCCACHE_LOG=info SCCACHE_ERROR_LOG=$(pwd)/artifacts/sccache.log sccache --start-server
 
-          xcrun cmake -G Ninja \
-                -B build \
-                -S llvm \
-                -DLLVM_ENABLE_PROJECTS="${PROJECTS}" \
-                -DLLVM_DISABLE_ASSEMBLY_FILES=ON \
-                -DCMAKE_BUILD_TYPE=Release \
-                -DLLDB_INCLUDE_TESTS=OFF \
-                -DLLVM_ENABLE_ASSERTIONS=ON \
-                -DCMAKE_C_COMPILER_LAUNCHER=sccache \
-                -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
-
-          ninja -C build ${CHECK_TARGETS}
-      - name: Show sccache stats
-        if: always()
-        run: |
-          mkdir -p artifacts
-          sccache --show-stats
-          sccache --show-stats >> artifacts/sccache_stats.txt
+          ./.ci/monolithic-macos.sh "${{ needs.premerge-compute-macos.outputs.macos-projects }}" "${{ needs.premerge-compute-macos.outputs.macos-check-targets }}"
       - name: Upload Artifacts
         # In some cases, Github will fail to upload the artifact. We want to
         # continue anyways as a failed artifact upload is an infra failure, not