From 3b4124cda6dee339b39bf8afaa7b99f6c993351d Mon Sep 17 00:00:00 2001
From: Guilhem Saurel <guilhem.saurel@laas.fr>
Date: Fri, 5 Jul 2024 16:41:56 +0200
Subject: [PATCH] CMake: allow use of installed jrl-cmakemodule

---
 sdk/master_board_sdk/CMakeLists.txt | 35 ++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/sdk/master_board_sdk/CMakeLists.txt b/sdk/master_board_sdk/CMakeLists.txt
index 3309411..255b40b 100644
--- a/sdk/master_board_sdk/CMakeLists.txt
+++ b/sdk/master_board_sdk/CMakeLists.txt
@@ -26,14 +26,33 @@ option(PYTHON_DEB_LAYOUT "Enable Debian-style Python package layout" OFF)
 
 # Check if the submodule cmake have been initialized
 set(JRL_CMAKE_MODULES "${CMAKE_CURRENT_LIST_DIR}/cmake")
-if(NOT EXISTS "${CMAKE_SOURCE_DIR}/cmake/base.cmake")
-  message(STATUS "JRL cmakemodules not found. Let's fetch it.")
-  include(FetchContent)
-  FetchContent_Declare(
-    "jrl-cmakemodules"
-    GIT_REPOSITORY "https://github.com/jrl-umi3218/jrl-cmakemodules.git")
-  FetchContent_MakeAvailable("jrl-cmakemodules")
-  FetchContent_GetProperties("jrl-cmakemodules" SOURCE_DIR JRL_CMAKE_MODULES)
+if(EXISTS "${JRL_CMAKE_MODULES}/base.cmake")
+  message(STATUS "JRL cmakemodules found in 'cmake/' git submodule")
+else()
+  find_package(jrl-cmakemodules QUIET CONFIG)
+  if(jrl-cmakemodules_FOUND)
+    get_property(
+      JRL_CMAKE_MODULES
+      TARGET jrl-cmakemodules::jrl-cmakemodules
+      PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
+    message(STATUS "JRL cmakemodules found on system at ${JRL_CMAKE_MODULES}")
+  elseif(${CMAKE_VERSION} VERSION_LESS "3.14.0")
+    message(
+      FATAL_ERROR
+        "\nCan't find jrl-cmakemodules. Please either:\n"
+        "  - use git submodule: 'git submodule update --init'\n"
+        "  - or install https://github.com/jrl-umi3218/jrl-cmakemodules\n"
+        "  - or upgrade your CMake version to >= 3.14 to allow automatic fetching\n"
+    )
+  else()
+    message(STATUS "JRL cmakemodules not found. Let's fetch it.")
+    include(FetchContent)
+    FetchContent_Declare(
+      "jrl-cmakemodules"
+      GIT_REPOSITORY "https://github.com/jrl-umi3218/jrl-cmakemodules.git")
+    FetchContent_MakeAvailable("jrl-cmakemodules")
+    FetchContent_GetProperties("jrl-cmakemodules" SOURCE_DIR JRL_CMAKE_MODULES)
+  endif()
 endif()
 
 include("${JRL_CMAKE_MODULES}/base.cmake")