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function(download_external PCKG_NAME PCKG_DIR_NAME PCKG_URL)
# ARGV3 - optional md5 check
# ARGV4 - optional patch to apply
set(${PCKG_NAME}_DIR_NAME ${PCKG_DIR_NAME} CACHE INTERNAL "" FORCE)
if(NOT IS_DIRECTORY ${CMAKE_SOURCE_DIR}/external/${PCKG_DIR_NAME})
message(STATUS "Downloading ${PCKG_URL}...")
if(ARGV3)
file(DOWNLOAD
${PCKG_URL}
${CMAKE_BINARY_DIR}/${PCKG_DIR_NAME}.zip
INACTIVITY_TIMEOUT 15
SHOW_PROGRESS
STATUS DOWNLOAD_STATUS
EXPECTED_MD5 ${ARGV3})
else()
file(DOWNLOAD
${PCKG_URL}
${CMAKE_BINARY_DIR}/${PCKG_DIR_NAME}.zip
INACTIVITY_TIMEOUT 15
SHOW_PROGRESS
STATUS DOWNLOAD_STATUS)
endif()
list(GET DOWNLOAD_STATUS 0 DOWNLOAD_CODE)
if(NOT DOWNLOAD_CODE EQUAL 0)
list(GET DOWNLOAD_STATUS 1 DOWNLOAD_MESSAGE)
message(FATAL_ERROR "Download ${PCKG_URL} error ${DOWNLOAD_CODE}: ${DOWNLOAD_MESSAGE}")
endif()
message(STATUS "Unpacking ${PCKG_DIR_NAME}.zip ...")
execute_process(COMMAND unzip -q ${CMAKE_BINARY_DIR}/${PCKG_DIR_NAME}.zip
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/external
RESULT_VARIABLE UNZIP_ERROR
ERROR_VARIABLE UNZIP_ERROR_MESSAGE)
if(NOT UNZIP_ERROR STREQUAL 0)
message(FATAL_ERROR "unzip ${ARCHIVE_NAME} failed: ${UNZIP_ERROR} ${UNZIP_ERROR_MESSAGE}")
endif()
if(NOT IS_DIRECTORY ${CMAKE_SOURCE_DIR}/external/${PCKG_DIR_NAME})
message(FATAL_ERROR "Extracting ${PCKG_DIR_NAME}.zip didn't produce directory '${PCKG_DIR_NAME}'")
endif()
message(STATUS "Downloading ${PCKG_NAME} finished successfully")
if(ARGV4)
execute_process(COMMAND patch -p1 -i ${CMAKE_SOURCE_DIR}/external/${ARGV4}.patch
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/external/${PCKG_DIR_NAME}
RESULT_VARIABLE PATCH_ERROR
ERROR_VARIABLE PATCH_ERROR_MESSAGE)
if(NOT PATCH_ERROR STREQUAL 0)
message(FATAL_ERROR "Patching ${PCKG_DIR_NAME} failed: ${PATCH_ERROR} ${PATCH_ERROR_MESSAGE}")
endif()
endif()
else()
message(STATUS "Found ${PCKG_NAME}")
endif()
endfunction()
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