cmake: set COMPONENT_DIR in early expansion

Gives same treatment to COMPONENT_DIR as COMPONENT_PATH in
https://gitlab.espressif.cn:6688/espressif/esp-idf/merge_requests/4557

Closes https://github.com/espressif/esp-idf/issues/3771

CMakeLists.txt

@@ -70,7 +70,7 @@ foreach(component_target ${build_component_targets})
     set(COMPONENT_NAME ${_name})
     set(COMPONENT_DIR ${dir})
     set(COMPONENT_ALIAS ${alias})
-    set(COMPONENT_PATH ${dir}) # also deprecated, see comment in previous loop
+    set(COMPONENT_PATH ${dir}) # for backward compatibility only, COMPONENT_DIR is preferred
     idf_build_get_property(build_prefix __PREFIX)
     set(__idf_component_context 1)
     if(NOT prefix STREQUAL build_prefix)

tools/cmake/scripts/component_get_requirements.cmake

@@ -53,6 +53,10 @@ function(__component_get_requirements)
     # and set by the included CMakeLists.txt does not bleed into the next inclusion.
     # We are only interested in the public and private requirements of components
     __component_get_property(__component_dir ${__component_target} COMPONENT_DIR)
+    __component_get_property(__component_name ${__component_target} COMPONENT_NAME)
+    set(COMPONENT_NAME ${__component_name})
+    set(COMPONENT_DIR ${__component_dir})
+    set(COMPONENT_PATH ${__component_dir}) # for backward compatibility only, COMPONENT_DIR is preferred
     include(${__component_dir}/CMakeLists.txt OPTIONAL)
 
     spaces2list(__component_requires)