cmake: run git submodule update --init if needed

pthom · Dec 17, 2023 · 8311591 · 8311591
1 parent f465c27
commit 8311591
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
@@ -23,6 +23,17 @@ endif()
 #     set(HELLOIMGUI_IMGUI_SOURCE_DIR "path/to/your/imgui" CACHE STRING "" FORCE)
 #
 if (HELLOIMGUI_BUILD_IMGUI)
+    # if HELLOIMGUI_IMGUI_SOURCE_DIR is  CMAKE_CURRENT_LIST_DIR/imgui
+    # and the submodule is not present, update submodules
+    if (HELLOIMGUI_IMGUI_SOURCE_DIR STREQUAL ${CMAKE_CURRENT_LIST_DIR}/imgui)
+        if (NOT EXISTS ${HELLOIMGUI_IMGUI_SOURCE_DIR}/imgui.h)
+            # Run git submodule update --init --recursive
+            message(WARNING "Updating imgui submodule")
+            execute_process(COMMAND git submodule update --init --recursive
+                WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
+        endif()
+    endif()
+
     file(GLOB imgui_sources ${HELLOIMGUI_IMGUI_SOURCE_DIR}/*.h ${HELLOIMGUI_IMGUI_SOURCE_DIR}/*.cpp)
     set(imgui_sources ${imgui_sources} ${HELLOIMGUI_IMGUI_SOURCE_DIR}/misc/cpp/imgui_stdlib.cpp ${HELLOIMGUI_IMGUI_SOURCE_DIR}/misc/cpp/imgui_stdlib.h)
     if (HELLO_IMGUI_IMGUI_SHARED)