[nrf fromlist] cmake: construct build_info.yml when running package_h…

CMakeLists.txt

@@ -2472,4 +2472,4 @@ toolchain_linker_finalize()
 build_info(zephyr version VALUE ${PROJECT_VERSION_STR})
 build_info(zephyr zephyr-base VALUE ${ZEPHYR_BASE})
 
-yaml_save(NAME build_info)
+build_info_save()

cmake/modules/dts.cmake

@@ -205,6 +205,7 @@ function(dts_configuration_files)
       ${EXTRA_DTC_OVERLAY_FILE_AS_LIST}
     )
   endif()
+  build_info(devicetree files PATH ${dts_files})
 
   set(i 0)
   foreach(dts_file ${dts_files})
@@ -234,6 +235,7 @@ function(dts_configuration_files)
 
     set(DTS_ROOT_BINDINGS ${DTS_ROOT_BINDINGS} PARENT_SCOPE)
   endforeach()
+  build_info(devicetree bindings-dirs PATH ${CACHED_DTS_ROOT_BINDINGS})
 
   # Cache the location of the root bindings so they can be used by
   # scripts which use the build directory.
@@ -261,6 +263,7 @@ function(dts_edt_pickle)
   else()
     set(dts_preprocessor ${CMAKE_C_COMPILER})
   endif()
+  build_info(devicetree include-dirs PATH ${DTS_ROOT_SYSTEM_INCLUDE_DIRS})
   zephyr_dt_preprocess(
     CPP ${dts_preprocessor}
     SOURCE_FILES ${dts_files}
@@ -427,18 +430,11 @@ function(dts_dtc)
   endif(DTC)
 endfunction()
 
-function(dts_build_info_output)
-  build_info(devicetree files PATH ${dts_files})
-  build_info(devicetree include-dirs PATH ${DTS_ROOT_SYSTEM_INCLUDE_DIRS})
-  build_info(devicetree bindings-dirs PATH ${CACHED_DTS_ROOT_BINDINGS})
-endfunction()
-
 macro(dts_init)
   dts_configuration_files()
   dts_edt_pickle()
   dts_gen_defines()
   dts_gen_driver_kconfig()
   dts_import()
   dts_dtc()
-  dts_build_info_output()
 endmacro()

cmake/modules/extensions.cmake

@@ -3907,6 +3907,32 @@ function(build_info)
   endif()
 
   yaml_set(NAME build_info KEY cmake ${keys} ${type} "${values}" ${genex_flag})
+  if(BUILD_INFO_SYNC STREQUAL "instant")
+    build_info_save()
+  endif()
+endfunction()
+
+# Usage:
+#   build_info_save()
+#
+# This function save the build_info.yml info file with exchangeable build
+# information related to the current build.
+#
+# If no build info context has been created, then the function does nothing.
+#
+function(build_info_save)
+  if(DEFINED BUILD_INFO_SYNC AND NOT BUILD_INFO_SYNC MATCHES "(^instant$|^module$|^final$)")
+    message(WARNING
+      "BUILD_INFO_SYNC mode '${BUILD_INFO_SYNC}' unknown, valid modes are: "
+      "<instant|module|final>"
+    )
+  endif()
+  if(COMMAND yaml_context)
+    yaml_context(EXISTS NAME build_info result)
+    if(result)
+      yaml_save(NAME build_info)
+    endif()
+  endif()
 endfunction()
 
 ########################################################
@@ -6272,12 +6298,4 @@ if(CMAKE_SCRIPT_MODE_FILE)
   function(set_target_properties)
     # This silence the error: 'set_target_properties command is not scriptable'
   endfunction()
-
-  # Build info creates a custom target for handling of build info.
-  # build_info is not needed in script mode but still called by Zephyr CMake
-  # modules. Therefore disable build_info(...) in when including
-  # extensions.cmake in script mode.
-  function(build_info)
-    # This silence the error: 'Unknown CMake command "yaml_context"'
-  endfunction()
 endif()

cmake/modules/zephyr_default.cmake

@@ -134,9 +134,14 @@ foreach(module IN LISTS zephyr_cmake_modules)
     endif()
   endif()
 
+  if(BUILD_INFO_SYNC STREQUAL "module" AND COMMAND build_info_save)
+    build_info_save()
+  endif()
+
   list(REMOVE_ITEM SUB_COMPONENTS ${module})
   if(DEFINED SUB_COMPONENTS AND NOT SUB_COMPONENTS)
     # All requested Zephyr CMake modules have been loaded, so let's return.
+    build_info_save()
     return()
   endif()
 endforeach()