From 201bf2c7137d773d3681c14c7cbf89563489021b Mon Sep 17 00:00:00 2001
From: realtradam <github@tradam.dev>
Date: Tue, 3 Jan 2023 18:21:11 -0500
Subject: automatic download of submodules

---
 CMakeLists.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 387d90c..c100735 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,21 @@ file(GLOB SOURCES
 
 add_library(${PROJECT_NAME} ${SOURCES})
 
+find_package(Git QUIET)
+if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
+# Update submodules as needed
+	option(GIT_SUBMODULE "Check submodules during build" ON)
+	if(GIT_SUBMODULE)
+		message(STATUS "Submodule update")
+		execute_process(COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
+			WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+			RESULT_VARIABLE GIT_SUBMOD_RESULT)
+		if(NOT GIT_SUBMOD_RESULT EQUAL "0")
+			message(FATAL_ERROR "git submodule update --init failed with ${GIT_SUBMOD_RESULT}, please checkout submodules")
+		endif()
+	endif()
+endif()
+
 add_subdirectory(external/SDL)
 
 ExternalProject_Add(project_bgfx
-- 
cgit v1.2.3