From b22774e33d61b8b66ba42f83aef48fe3e70c9ef0 Mon Sep 17 00:00:00 2001
From: WerWolv <werwolv98@gmail.com>
Date: Fri, 17 Dec 2021 08:38:25 +0100
Subject: [PATCH] build: Added check for cloning ImHex without initializing its
 submodules

---
 CMakeLists.txt            |  1 +
 cmake/build_helpers.cmake | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ccaa8cef6..ced0d8dd4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,7 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")
 include("${CMAKE_SOURCE_DIR}/cmake/build_helpers.cmake")
 setDefaultBuiltTypeIfUnset()
+detectBadClone()
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
 
 # List plugin names here. Project name must match folder name
diff --git a/cmake/build_helpers.cmake b/cmake/build_helpers.cmake
index 1afe9dee2..9bee5b795 100644
--- a/cmake/build_helpers.cmake
+++ b/cmake/build_helpers.cmake
@@ -256,4 +256,15 @@ macro(setDefaultBuiltTypeIfUnset)
         set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Using Release build type as it was left unset" FORCE)
         set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release")
     endif()
+endmacro()
+
+macro(detectBadClone)
+    file (GLOB EXTERNAL_DIRS "external/*")
+    foreach (EXTERNAL_DIR ${EXTERNAL_DIRS})
+        file(GLOB RESULT "${EXTERNAL_DIR}/*")
+        list(LENGTH RESULT ENTRY_COUNT)
+        if(ENTRY_COUNT LESS_EQUAL 1)
+            message(FATAL_ERROR "External dependency ${EXTERNAL_DIR} is empty!\nMake sure to correctly clone ImHex using the --recurse-submodules git option or initialize the submodules manually.")
+        endif()
+    endforeach ()
 endmacro()
\ No newline at end of file