cmake: create domains.yaml

Support creation of domains.yaml to support
`west <build|flash|debug> --domain` when working with sysbuild multi
image.

Each Zephyr based image is added to list of domain that can be handled
by the Zephyr west extension commands.

Signed-off-by: Torsten Rasmussen <[email protected]>

Author: tejlmand

share/sysbuild/CMakeLists.txt

@@ -36,9 +36,13 @@ ExternalZephyrProject_Add(
   SOURCE_DIR ${APP_DIR}
   MAIN_APP
 )
+list(APPEND IMAGES "${app_name}")
+set(DEFAULT_IMAGE "${app_name}")
 
 add_subdirectory(bootloader)
 
 # This allows for board and app specific images to be included.
 include(${BOARD_DIR}/sysbuild.cmake OPTIONAL)
 include(${APP_DIR}/sysbuild.cmake OPTIONAL)
+
+include(cmake/domains.cmake)

share/sysbuild/bootloader/CMakeLists.txt

@@ -8,4 +8,7 @@ if(SB_CONFIG_BOOTLOADER_MCUBOOT)
     APPLICATION mcuboot
     SOURCE_DIR ${ZEPHYR_MCUBOOT_MODULE_DIR}/boot/zephyr/
   )
+  # MCUBoot default configuration is to perform a full chip erase.
+  # Placing MCUBoot first in list to ensure it is flashed before other images.
+  set(IMAGES "mcuboot" ${IMAGES} PARENT_SCOPE)
 endif()

share/sysbuild/cmake/domains.cmake

@@ -0,0 +1,12 @@
+# Copyright (c) 2021 Nordic Semiconductor
+#
+# SPDX-License-Identifier: Apache-2.0
+
+set(domains_yaml "default: ${DEFAULT_IMAGE}")
+set(domains_yaml "${domains_yaml}\nbuild_dir: ${CMAKE_BINARY_DIR}")
+set(domains_yaml "${domains_yaml}\ndomains:")
+foreach(image ${IMAGES})
+  set(domains_yaml "${domains_yaml}\n  - name: ${image}")
+  set(domains_yaml "${domains_yaml}\n    build_dir: $<TARGET_PROPERTY:${image},_EP_BINARY_DIR>")
+endforeach()
+file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/domains.yaml CONTENT "${domains_yaml}")