From e80362252fbb06b2e71b9e46076ff2342e4ae353 Mon Sep 17 00:00:00 2001
From: Ben Boeckel <ben.boeckel@kitware.com>
Date: Mon, 28 Sep 2020 09:57:24 -0400
Subject: ci: support a max parallelism for tests

Machines may have more cores than testing actually supports.
---
 .gitlab/ci/ctest_test.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/.gitlab/ci/ctest_test.cmake b/.gitlab/ci/ctest_test.cmake
index 569139d..08ef18f 100644
--- a/.gitlab/ci/ctest_test.cmake
+++ b/.gitlab/ci/ctest_test.cmake
@@ -10,6 +10,11 @@ ctest_start(APPEND)
 
 include(ProcessorCount)
 ProcessorCount(nproc)
+if (NOT "$ENV{CTEST_MAX_PARALLELISM}" STREQUAL "")
+  if (nproc GREATER "$ENV{CTEST_MAX_PARALLELISM}")
+    set(nproc "$ENV{CTEST_MAX_PARALLELISM}")
+  endif ()
+endif ()
 
 include("${CMAKE_CURRENT_LIST_DIR}/ctest_exclusions.cmake")
 ctest_test(
-- 
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