cmake: Allow user to override the net init config file

User can set NET_CONFIG_FILE to override the name of the
default configuration file name which is network-config.yaml
This way a substitute yaml config file can be used instead of
the default one.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

cmake/modules/configuration_files.cmake

@@ -16,6 +16,7 @@
 # - EXTRA_DTC_OVERLAY_FILE  List of additional devicetree overlay files
 # - DTS_EXTRA_CPPFLAGS      List of additional devicetree preprocessor defines
 # - APPLICATION_CONFIG_DIR: Root folder for application configuration
+# - NET_INIT_CONFIG_FILE:   Name of the network init configuration file
 #
 # If any of the above variables are already set when this CMake module is
 # loaded, then no changes to the variable will happen.
@@ -95,5 +96,6 @@ zephyr_boilerplate_watch(DTC_OVERLAY_FILE)
 zephyr_get(EXTRA_CONF_FILE SYSBUILD LOCAL VAR EXTRA_CONF_FILE OVERLAY_CONFIG MERGE REVERSE)
 zephyr_get(EXTRA_DTC_OVERLAY_FILE SYSBUILD LOCAL MERGE REVERSE)
 zephyr_get(DTS_EXTRA_CPPFLAGS SYSBUILD LOCAL MERGE REVERSE)
+zephyr_get(NET_INIT_CONFIG_FILE)
 build_info(application source-dir VALUE ${APPLICATION_SOURCE_DIR})
 build_info(application configuration-dir VALUE ${APPLICATION_CONFIG_DIR})

cmake/modules/kernel.cmake

@@ -261,8 +261,11 @@ if(CONFIG_NET_CONFIG_SETTINGS)
   # If network configuration library is enabled, check if the yaml file
   # is present and use it to generate an initial configuration. Otherwise
   # use the .config file to generate the initial configuration.
-  if(EXISTS ${APPLICATION_SOURCE_DIR}/network-config.yaml)
-    network_generate_config_file_for_target(app ${APPLICATION_SOURCE_DIR}/network-config.yaml)
+  if(NOT NET_CONFIG_FILE)
+    set(NET_CONFIG_FILE ${APPLICATION_SOURCE_DIR}/network-config.yaml)
+  endif()
+  if(EXISTS ${NET_CONFIG_FILE})
+    network_generate_config_file_for_target(app ${NET_CONFIG_FILE})
   else()
     network_generate_config_file_for_target(app ${DOTCONFIG})
   endif()