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zephyr_module.cmake
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# SPDX-License-Identifier: Apache-2.0
# This cmake file provides functionality to import CMakeLists.txt and Kconfig
# files for Zephyr modules into Zephyr build system.
#
# CMakeLists.txt and Kconfig files can reside directly in the module or in a
# MODULE_EXT_ROOT.
# The `<module>/zephyr/module.yml` file specifies whether the build files are
# located in the module or in a MODULE_EXT_ROOT.
#
# A list of Zephyr modules can be provided to the build system using:
# -DZEPHYR_MODULES=<module-path>[;<additional-module(s)-path>]
#
# It looks for: <module>/zephyr/module.yml or
# <module>/zephyr/CMakeLists.txt
# to load the module into Zephyr build system.
# If west is available, it uses `west list` to obtain a list of projects to
# search for zephyr/module.yml
#
# If the module.yml file specifies that build files are located in a
# MODULE_EXT_ROOT then the variables:
# - `ZEPHYR_<MODULE_NAME>_CMAKE_DIR` is used for inclusion of the CMakeLists.txt
# - `ZEPHYR_<MODULE_NAME>_KCONFIG` is used for inclusion of the Kconfig
# files into the build system.
if(ZEPHYR_MODULES)
set(ZEPHYR_MODULES_ARG "--modules" ${ZEPHYR_MODULES})
endif()
if(ZEPHYR_EXTRA_MODULES)
set(ZEPHYR_EXTRA_MODULES_ARG "--extra-modules" ${ZEPHYR_EXTRA_MODULES})
endif()
set(KCONFIG_MODULES_FILE ${KCONFIG_BINARY_DIR}/Kconfig.modules)
set(ZEPHYR_SETTINGS_FILE ${CMAKE_BINARY_DIR}/zephyr_settings.txt)
if(WEST)
set(WEST_ARG "--zephyr-base" ${ZEPHYR_BASE})
endif()
if(WEST OR ZEPHYR_MODULES)
# Zephyr module uses west, so only call it if west is installed or
# ZEPHYR_MODULES was provided as argument to CMake.
execute_process(
COMMAND
${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/zephyr_module.py
${WEST_ARG}
${ZEPHYR_MODULES_ARG}
${ZEPHYR_EXTRA_MODULES_ARG}
--kconfig-out ${KCONFIG_MODULES_FILE}
--cmake-out ${CMAKE_BINARY_DIR}/zephyr_modules.txt
--settings-out ${ZEPHYR_SETTINGS_FILE}
WORKING_DIRECTORY ${ZEPHYR_BASE}
ERROR_VARIABLE
zephyr_module_error_text
RESULT_VARIABLE
zephyr_module_return
)
if(${zephyr_module_return})
message(FATAL_ERROR "${zephyr_module_error_text}")
endif()
if(EXISTS ${ZEPHYR_SETTINGS_FILE})
file(STRINGS ${ZEPHYR_SETTINGS_FILE} ZEPHYR_SETTINGS_TXT ENCODING UTF-8 REGEX "^[^#]")
foreach(setting ${ZEPHYR_SETTINGS_TXT})
# Match <key>:<value> for each line of file, each corresponding to
# a setting. The use of quotes is required due to CMake not supporting
# lazy regexes (it supports greedy only).
string(REGEX REPLACE "\"(.*)\":\".*\"" "\\1" key ${setting})
string(REGEX REPLACE "\".*\":\"(.*)\"" "\\1" value ${setting})
# MODULE_EXT_ROOT is process order which means module roots processed
# later wins. To ensure ZEPHYR_BASE stays first, and command line settings
# are processed last, we insert at position 1.
if ("${key}" STREQUAL "MODULE_EXT_ROOT")
list(INSERT ${key} 1 ${value})
else()
list(APPEND ${key} ${value})
endif()
endforeach()
endif()
if(EXISTS ${CMAKE_BINARY_DIR}/zephyr_modules.txt)
file(STRINGS ${CMAKE_BINARY_DIR}/zephyr_modules.txt ZEPHYR_MODULES_TXT
ENCODING UTF-8)
set(ZEPHYR_MODULE_NAMES)
foreach(module ${ZEPHYR_MODULES_TXT})
# Match "<name>":"<path>" for each line of file, each corresponding to
# one module. The use of quotes is required due to CMake not supporting
# lazy regexes (it supports greedy only).
string(REGEX REPLACE "\"(.*)\":\".*\":\".*\"" "\\1" module_name ${module})
list(APPEND ZEPHYR_MODULE_NAMES ${module_name})
endforeach()
endif()
foreach(root ${MODULE_EXT_ROOT})
if(NOT EXISTS ${root})
message(FATAL_ERROR "No `modules.cmake` found in module root `${root}`.")
endif()
include(${root}/modules/modules.cmake)
endforeach()
if(DEFINED ZEPHYR_MODULES_TXT)
foreach(module ${ZEPHYR_MODULES_TXT})
# Match "<name>":"<path>" for each line of file, each corresponding to
# one module. The use of quotes is required due to CMake not supporting
# lazy regexes (it supports greedy only).
string(CONFIGURE ${module} module)
string(REGEX REPLACE "\"(.*)\":\".*\":\".*\"" "\\1" module_name ${module})
string(REGEX REPLACE "\".*\":\"(.*)\":\".*\"" "\\1" module_path ${module})
string(REGEX REPLACE "\".*\":\".*\":\"(.*)\"" "\\1" cmake_path ${module})
zephyr_string(SANITIZE TOUPPER MODULE_NAME_UPPER ${module_name})
if(NOT ${MODULE_NAME_UPPER} STREQUAL CURRENT)
set(ZEPHYR_${MODULE_NAME_UPPER}_MODULE_DIR ${module_path})
set(ZEPHYR_${MODULE_NAME_UPPER}_CMAKE_DIR ${cmake_path})
else()
message(FATAL_ERROR "Found Zephyr module named: ${module_name}\n\
${MODULE_NAME_UPPER} is a restricted name for Zephyr modules as it is used for \
\${ZEPHYR_${MODULE_NAME_UPPER}_MODULE_DIR} CMake variable.")
endif()
endforeach()
endif()
else()
file(WRITE ${KCONFIG_MODULES_FILE}
"# No west and no modules\n"
)
endif()
if(DEFINED ZEPHYR_MODULE_NAMES)
list(REMOVE_DUPLICATES ZEPHYR_MODULE_NAMES)
endif()