From 8809183d58c6ffbe9b9479ac43f44c985a4b8a5b Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 4 Feb 2022 07:15:40 -0500
Subject: Tests: Optionally extend RunCMake.ExternalProject download server
 timeout

Some of the `RunCMake.ExternalProject` test cases use a download server
implemented in Python.  Normally we wait up to 30 seconds for it to
start.  However, on some machines running many tests concurrently, the
download server may take longer than that to start.  Add an undocumented
cache entry to use on those machines to extend the timeout.
---
 Tests/RunCMake/CMakeLists.txt                     | 3 +++
 Tests/RunCMake/ExternalProject/RunCMakeTest.cmake | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index 1d7e632..ddc00f8 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -733,6 +733,9 @@ add_RunCMake_test(CPackInstallProperties)
 if(XCODE_VERSION)
   set(ExternalProject_ARGS -DXCODE_VERSION=${XCODE_VERSION})
 endif()
+if(CMake_TEST_RunCMake_ExternalProject_DOWNLOAD_SERVER_TIMEOUT)
+  list(APPEND ExternalProject_ARGS -DDOWNLOAD_SERVER_TIMEOUT=${CMake_TEST_RunCMake_ExternalProject_DOWNLOAD_SERVER_TIMEOUT})
+endif()
 add_RunCMake_test(ExternalProject)
 add_RunCMake_test(FetchContent)
 set(CTestCommandLine_ARGS -DPYTHON_EXECUTABLE=${PYTHON_EXECUTABLE})
diff --git a/Tests/RunCMake/ExternalProject/RunCMakeTest.cmake b/Tests/RunCMake/ExternalProject/RunCMakeTest.cmake
index fde384f..08adee2 100644
--- a/Tests/RunCMake/ExternalProject/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ExternalProject/RunCMakeTest.cmake
@@ -105,12 +105,15 @@ function(__ep_test_with_build_with_server testName)
   if(EXISTS "${URL_FILE}")
     file(REMOVE "${URL_FILE}")
   endif()
+  if(NOT DOWNLOAD_SERVER_TIMEOUT)
+    set(DOWNLOAD_SERVER_TIMEOUT 30)
+  endif()
   execute_process(
     COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_LIST_DIR}/DownloadServer.py --file "${URL_FILE}" ${ARGN}
     OUTPUT_FILE ${RunCMake_BINARY_DIR}/${testName}-python.txt
     ERROR_FILE ${RunCMake_BINARY_DIR}/${testName}-python.txt
     RESULT_VARIABLE result
-    TIMEOUT 30
+    TIMEOUT "${DOWNLOAD_SERVER_TIMEOUT}"
     )
   if(NOT result EQUAL 0)
     message(FATAL_ERROR "Failed to start download server:\n  ${result}")
-- 
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