zephyr: direct inclusion of the hooks file

This patch removes CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE option
which was used to point to hooks implementation file.
It is better that the project customization is up to add required
files instead. This gives more flexibility in provisioning these
sources (there may be multiple files).
This also simplifies Kconfig options.

In order to keep possibility for build-test the Hooks feature
hooks_sample.c will be included into the build if commandline
will specify -DTEST_BOOT_IMAGE_ACCESS_HOOKS=Y option.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>

boot/bootutil/zephyr/CMakeLists.txt

@@ -17,27 +17,12 @@ zephyr_library_sources(
   ../src/bootutil_public.c
     )
 
-if(CONFIG_BOOT_IMAGE_ACCESS_HOOKS)
-  if(NOT CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE STREQUAL "")
-    if(IS_ABSOLUTE ${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-      if(EXISTS ${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-        set(HOOKS_FILE ${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-      endif()
-    elseif((DEFINED CONF_DIR) AND
-           (EXISTS ${CONF_DIR}/${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE}))
-      set(HOOKS_FILE ${CONF_DIR}/${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-    else(EXISTS ${APPLICATION_SOURCE_DIR}/${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-      set(HOOKS_FILE ${APPLICATION_SOURCE_DIR}/${CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE})
-    endif()
-  endif()
-
-  if(DEFINED HOOKS_FILE)
-      zephyr_library_sources(
-        ${HOOKS_FILE}
-      )
-  else()
-    message(STATUS "No hooks implementation file.")
-  endif()
+# Sensitivity to the TEST_BOOT_IMAGE_ACCESS_HOOKS define is implemented for
+# allowing the test-build with the hooks feature enabled.
+if(TEST_BOOT_IMAGE_ACCESS_HOOKS)
+  zephyr_library_sources(
+    ${APPLICATION_SOURCE_DIR}/hooks_sample.c
+  )
 endif()
 
 zephyr_library_link_libraries(MCUBOOT_BOOTUTIL)

boot/zephyr/Kconfig

@@ -569,18 +569,8 @@ config BOOT_IMAGE_ACCESS_HOOKS
 	help
 	  Allow to provide procedures for override or extend native
 	  MCUboot's routines required for access the image data and the image
-	  update.
-
-config BOOT_IMAGE_ACCESS_HOOKS_FILE
-	string "Hooks implementation file path"
-	depends on BOOT_IMAGE_ACCESS_HOOKS
-	help
-	  Path to the file which implements hooks.
-	  You can use either absolute or relative path.
-	  In case relative path is used, the build system assumes that it starts
-	  from the directory where the MCUBoot KConfig configuration file is
-	  located. If the key file is not there, the build system uses relative
-	  path that starts from the zephyr port cmake directory (boot/zephyr/).
+	  update. It is up to the project customization to add required source
+	  files to the build.
 
 config MCUBOOT_ACTION_HOOKS
 	bool "Enable hooks for responding to MCUboot status changes"

boot/zephyr/boards/nrf52840dk_hooks_sample_overlay.conf

@@ -4,4 +4,3 @@ CONFIG_FLASH_SIMULATOR=y
 CONFIG_FLASH_SIMULATOR_UNALIGNED_READ=y
 
 CONFIG_BOOT_IMAGE_ACCESS_HOOKS=y
-CONFIG_BOOT_IMAGE_ACCESS_HOOKS_FILE="hooks_sample.c"

boot/zephyr/sample.yaml

@@ -44,6 +44,7 @@ tests:
   sample.bootloader.mcuboot.hooks_multi:
     extra_args: DTC_OVERLAY_FILE=./boards/nrf52840dk_ram_multi.overlay
       OVERLAY_CONFIG=./boards/nrf52840dk_hooks_sample_overlay.conf
+      TEST_BOOT_IMAGE_ACCESS_HOOKS=Y
     platform_allow: nrf52840dk_nrf52840
     integration_platforms:
       - nrf52840dk_nrf52840