optional app-colcon.meta in project directory (#57)

Signed-off-by: Raphael Vogelgsang <fixed-term.Raphael.Vogelgsang@de.bosch.com>

Author: donRaphaco

CMakeLists.txt

@@ -8,6 +8,11 @@ else()
 set(submake "make")
 endif()
 
+set(APP_COLCON_META "${PROJECT_DIR}/app-colcon.meta")
+if(NOT EXISTS "${APP_COLCON_META}")
+set(APP_COLCON_META "")
+endif()
+
 externalproject_add(libmicroros_project
     PREFIX     ${CMAKE_BINARY_DIR}/libmicroros-prefix
     SOURCE_DIR ${COMPONENT_DIR}
@@ -24,6 +29,7 @@ externalproject_add(libmicroros_project
             BUILD_DIR=${CMAKE_BINARY_DIR}
             IDF_PATH=${IDF_PATH}
             IDF_TARGET=${IDF_TARGET}
+            APP_COLCON_META=${APP_COLCON_META}
     INSTALL_COMMAND ""
     BUILD_BYPRODUCTS ${COMPONENT_DIR}/libmicroros.a
     )

examples/int32_publisher_custom_transport/app-colcon.meta

@@ -0,0 +1,9 @@
+{
+    "names": {
+        "rmw_microxrcedds": {
+            "cmake-args": [
+                "-DRMW_UXRCE_TRANSPORT=custom"
+            ]
+        }
+    }
+}

libmicroros.mk

@@ -79,7 +79,7 @@ $(EXTENSIONS_DIR)/micro_ros_src/install: $(EXTENSIONS_DIR)/esp32_toolchain.cmake
 	colcon build \
 		--merge-install \
 		--packages-ignore-regex=.*_cpp \
-		--metas $(EXTENSIONS_DIR)/colcon.meta \
+		--metas $(EXTENSIONS_DIR)/colcon.meta $(APP_COLCON_META) \
 		--cmake-args \
 		"--no-warn-unused-cli" \
 		-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=OFF \