Added support for adding additional python project inside the wheel

README.md

@@ -44,6 +44,10 @@ add_library(mylib ...)
 #  Python module dependencies (requirements.txt content)
 # SCRIPTS
 #  Additional scripts that should be part of the wheel.
+# PYTHON_PACKAGE_DIRS
+#  Paths to directories of additional Python packages, which
+#  are bundled with the wheel. This could for example contain
+#  pybind11 binding module wrappers.
 # SUBMODULES
 #  Any pybind11 submodules must be listed here to support imports like 
 #  "from mod.sub import x". A nested submodule must be listed like
@@ -64,6 +68,9 @@ add_wheel(mylib-python-bindings
   SCRIPTS
     /path/to/python/script1
     /path/to/python/script2
+  PYTHON_PACKAGE_DIRS
+    /path/to/python/project1
+    /path/to/python/project2
 )
 ```
 

python-wheel.cmake

@@ -41,10 +41,9 @@ function (add_wheel WHEEL_TARGET)
   cmake_parse_arguments(WHEEL
     ""
     "NAME;AUTHOR;URL;EMAIL;PYTHON_REQUIRES;VERSION;DESCRIPTION;README_PATH;LICENSE_PATH"
-    "TARGET_DEPENDENCIES;MODULE_DEPENDENCIES;DEPLOY_FILES;SUBMODULES;SCRIPTS" ${ARGN})
+    "TARGET_DEPENDENCIES;MODULE_DEPENDENCIES;DEPLOY_FILES;SUBMODULES;SCRIPTS;PYTHON_PACKAGE_DIRS" ${ARGN})
 
   to_python_list_string(WHEEL_MODULE_DEPENDENCIES WHEEL_MODULE_DEPENDENCIES_PYLIST)
-  to_python_list_string(WHEEL_SCRIPTS WHEEL_SCRIPTS_PYLIST)
 
   if (NOT WHEEL_VERSION)
     message(FATAL_ERROR "Missing wheel version.")
@@ -141,9 +140,25 @@ function (add_wheel WHEEL_TARGET)
       add_custom_command(TARGET ${WHEEL_TARGET}-copy-files
         POST_BUILD
         COMMAND ${CMAKE_COMMAND} -E echo "Copying script from ${file} to ${WHEEL_PACKAGE_DIR}"
-        COMMAND ${CMAKE_COMMAND} -E copy "${file}" "${WHEEL_PACKAGE_DIR}/")
+        COMMAND ${CMAKE_COMMAND} -E copy "${file}" "${WHEEL_PACKAGE_DIR}/"
+      )
+    endforeach()
+  endif()
+  to_python_list_string(WHEEL_SCRIPTS WHEEL_SCRIPTS_PYLIST)
+
+  set(WHEEL_PROJECTS "${WHEEL_NAME}")
+  if (WHEEL_PYTHON_PACKAGE_DIRS)
+    foreach (path IN LISTS WHEEL_PYTHON_PACKAGE_DIRS)
+      get_filename_component(path_last_dir ${path} NAME)
+      add_custom_command(TARGET ${WHEEL_TARGET}-copy-files
+        POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E echo "Copying directory from ${path} to ${WHEEL_LIB_DIR}/${path_last_dir}"
+        COMMAND ${CMAKE_COMMAND} -E copy_directory "${path}" "${WHEEL_LIB_DIR}/${path_last_dir}"
+      )
+      list(APPEND WHEEL_PROJECTS ${path_last_dir})
     endforeach()
   endif()
+  to_python_list_string(WHEEL_PROJECTS WHEEL_PYTHON_PACKAGE_DIRS_PYLIST)
 
   set(SETUP_FILE "${CMAKE_CURRENT_BINARY_DIR}/setup.py")
   configure_file("${PY_WHEEL_SETUP_FILE}" "${SETUP_FILE}")

setup.py.in

@@ -71,7 +71,7 @@ kwargs = dict(
         @WHEEL_MODULE_DEPENDENCIES_PYLIST@
     ],
     package_dir = {"": "@WHEEL_NAME@.wheel"},
-    packages = ["@WHEEL_NAME@"],
+    packages = [@WHEEL_PYTHON_PACKAGE_DIRS_PYLIST@],
     package_data = {
         "@WHEEL_NAME@": ["*"]
     },