esp-idf/components/app_update/CMakeLists.txt

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CMake
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set(COMPONENT_SRCS "esp_ota_ops.c"
"esp_app_desc.c")
set(COMPONENT_ADD_INCLUDEDIRS "include")
set(COMPONENT_REQUIRES spi_flash partition_table bootloader_support)
register_component()
# esp_app_desc structure is added as an undefined symbol because otherwise the
# linker will ignore this structure as it has no other files depending on it.
target_link_libraries(${COMPONENT_TARGET} "-u esp_app_desc")
# cut PROJECT_VER and PROJECT_NAME to required 32 characters.
string(SUBSTRING "${PROJECT_VER}" 0 31 PROJECT_VER_CUT)
string(SUBSTRING "${PROJECT_NAME}" 0 31 PROJECT_NAME_CUT)
set_source_files_properties(
SOURCE "esp_app_desc.c"
PROPERTIES COMPILE_DEFINITIONS
"PROJECT_VER=\"${PROJECT_VER_CUT}\"; PROJECT_NAME=\"${PROJECT_NAME_CUT}\"")
# Add custom target for generating empty otadata partition for flashing
if(OTADATA_PARTITION_OFFSET AND OTADATA_PARTITION_SIZE)
add_custom_command(OUTPUT "${IDF_BUILD_ARTIFACTS_DIR}/${BLANK_OTADATA_FILE}"
COMMAND ${PYTHON} ${IDF_PATH}/components/partition_table/parttool.py
--partition-type data --partition-subtype ota -q
--partition-table-file ${PARTITION_CSV_PATH} generate_blank_partition_file
--output "${IDF_BUILD_ARTIFACTS_DIR}/${BLANK_OTADATA_FILE}")
add_custom_target(blank_ota_data ALL DEPENDS "${IDF_BUILD_ARTIFACTS_DIR}/${BLANK_OTADATA_FILE}")
add_dependencies(flash blank_ota_data)
endif()
set(otatool_py ${PYTHON} ${COMPONENT_PATH}/otatool.py)
add_custom_target(read_otadata DEPENDS "${PARTITION_CSV_PATH}"
COMMAND ${otatool_py} --partition-table-file ${PARTITION_CSV_PATH} read_otadata)
add_custom_target(erase_otadata DEPENDS "${PARTITION_CSV_PATH}"
COMMAND ${otatool_py} --partition-table-file ${PARTITION_CSV_PATH} erase_otadata)