Support buildings bindings as standalone project with external hde

CMakeLists.txt

@@ -36,7 +36,6 @@ find_package(YCM REQUIRED)
 # Import cmake utilities
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 include(AddWarningsConfigurationToTarget)
-include(AddHDEPythonModule)
 
 # To build shared libraries in Windows, we set CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS to TRUE
 # See https://cmake.org/cmake/help/v3.4/variable/CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS.html
@@ -74,11 +73,6 @@ if(NOT MSVC)
                               USE_LINK_PATH)
 endif()
 
-
-#Function to automatize the process of creating python bindings
-include(AddWearablesPythonModule)
-
-
 # Tweak linker flags in Linux
 if(UNIX AND NOT APPLE)
     get_filename_component(LINKER_BIN ${CMAKE_LINKER} NAME)

bindings/CMakeLists.txt

@@ -1,7 +1,31 @@
 # SPDX-FileCopyrightText: Fondazione Istituto Italiano di Tecnologia (IIT)
 # SPDX-License-Identifier: BSD-3-Clause
 
+# Detect if we are doing a standalone build of the bindings, using an external icub-main
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+  set(HDE_BINDINGS_BUILD_STANDALONE TRUE)
+else()
+  set(HDE_BINDINGS_BUILD_STANDALONE FALSE)
+endif()
+
+if(HDE_BINDINGS_BUILD_STANDALONE)
+  cmake_minimum_required(VERSION 3.16)
+  # Extract project version from top project
+  file(READ ${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt cmake_content)
+  string(REGEX MATCH "VERSION[ ]+([0-9]+\\.[0-9]+\\.[0-9]+)" cmake_version_match ${cmake_content})
+  set(top_project_version ${CMAKE_MATCH_1})
+  project(HumanDynamicsEstimationBindings
+          VERSION ${top_project_version})
+  set(HDE_COMPILE_PYTHON_BINDINGS ON)
+  find_package(YARP REQUIRED)
+  find_package(WearableData REQUIRED)
+  find_package(HumanDynamicsEstimation REQUIRED)
+  list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)
+endif()
+
 if(HDE_COMPILE_PYTHON_BINDINGS)
+  include(AddWearablesPythonModule)
+  include(AddHDEPythonModule)
 
   find_package(Python3 3.6 COMPONENTS Interpreter Development REQUIRED)