From 935eaf8de3ec02bba932bf76157c878f4a960a23 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Wo=CC=81jcik?=
 <3044353+pwojcikdev@users.noreply.github.com>
Date: Fri, 15 Mar 2024 17:12:56 +0100
Subject: [PATCH] Limit build parallelism for github runners

---
 .github/workflows/code_sanitizers.yml |  2 ++
 ci/build.sh                           | 18 +++++++++++++-----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/code_sanitizers.yml b/.github/workflows/code_sanitizers.yml
index c82c31b280..54d2ceb9f7 100644
--- a/.github/workflows/code_sanitizers.yml
+++ b/.github/workflows/code_sanitizers.yml
@@ -41,6 +41,8 @@ jobs:
       - name: Build Tests
         id: build
         run: ci/build-tests.sh
+        env:
+          MAX_BUILD_PARALLELISM: 2 # Limit parallelism to avoid OOM during compilation
 
       - name: Core Tests
         if: steps.build.outcome == 'success' && (success() || failure())
diff --git a/ci/build.sh b/ci/build.sh
index 4aabc4d0fb..3dfdbdf082 100755
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -70,21 +70,29 @@ ${CMAKE_BACKTRACE:-} \
 ${SRC}
 
 number_of_processors() {
+    local max_procs=$(nproc)
     case "$(uname -s)" in
-        Linux*)     
-            nproc
+        Linux*)
+            max_procs=$(nproc)
             ;;
-        Darwin*)    
-            sysctl -n hw.ncpu
+        Darwin*)
+            max_procs=$(sysctl -n hw.ncpu)
             ;;
         CYGWIN*|MINGW32*|MSYS*|MINGW*)
-            echo "${NUMBER_OF_PROCESSORS}"
+            max_procs="${NUMBER_OF_PROCESSORS}"
             ;;
         *)
             echo "Unknown OS"
             exit 1
             ;;
     esac
+
+    # If MAX_BUILD_PARALLELISM is set and less than the number of processors, use it instead
+    if [[ ! -z ${MAX_BUILD_PARALLELISM:-} ]] && [[ "$MAX_BUILD_PARALLELISM" -lt "$max_procs" ]]; then
+        echo "$MAX_BUILD_PARALLELISM"
+    else
+        echo "$max_procs"
+    fi
 }
 
 parallel_build_flag() {