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#
# ExternalSource_Download(VAR ...)
#
function(ExternalSource_Download PREFIX)
include(CMakeParseArguments)
nncc_include(StampTools)
cmake_parse_arguments(ARG "" "DIRNAME;URL;CHECKSUM" "" ${ARGN})
# Configure URL
if(ARG_URL)
set(URL ${ARG_URL})
else()
# Use the first unparsed argument as URL (for backward compatibility)
list(GET ARG_UNPARSED_ARGUMENTS 0 URL)
endif(ARG_URL)
# Configure DIRNAME
if(NOT ARG_DIRNAME)
# Use PREFIX as DIRNAME (for backward compatibility)
set(DIRNAME ${PREFIX})
else()
set(DIRNAME ${ARG_DIRNAME})
endif(NOT ARG_DIRNAME)
get_filename_component(FILENAME ${URL} NAME)
set(CACHE_DIR "${NNCC_EXTERNALS_DIR}")
set(OUT_DIR "${CACHE_DIR}/${DIRNAME}")
set(TMP_DIR "${CACHE_DIR}/${DIRNAME}-tmp")
set(DOWNLOAD_PATH "${CACHE_DIR}/${DIRNAME}-${FILENAME}")
set(STAMP_PATH "${CACHE_DIR}/${DIRNAME}.stamp")
if(NOT EXISTS "${CACHE_DIR}")
file(MAKE_DIRECTORY "${CACHE_DIR}")
endif(NOT EXISTS "${CACHE_DIR}")
# Compare URL in STAMP file and the given URL
Stamp_Check(URL_CHECK "${STAMP_PATH}" "${URL}")
if(NOT URL_CHECK)
file(REMOVE "${STAMP_PATH}")
file(REMOVE_RECURSE "${OUT_DIR}")
file(REMOVE_RECURSE "${TMP_DIR}")
file(MAKE_DIRECTORY "${TMP_DIR}")
message("-- Download ${PREFIX} from ${URL}")
file(DOWNLOAD ${URL} "${DOWNLOAD_PATH}" SHOW_PROGRESS)
message("-- Download ${PREFIX} from ${URL} - done")
# Verify checksum
if(ARG_CHECKSUM)
message(STATUS "Verify ${PREFIX} archive")
string(REPLACE "=" ";" CHECKSUM_SPEC "${ARG_CHECKSUM}")
list(GET CHECKSUM_SPEC 0 CHECKSUM_ALG)
list(GET CHECKSUM_SPEC 1 CHECKSUM_VAL)
string(STRIP "${CHECKSUM_VAL}" CHECKSUM_VAL)
set(EXPECTED_CHECKSUM ${CHECKSUM_VAL})
file(${CHECKSUM_ALG} "${DOWNLOAD_PATH}" OBTAINED_CHECKSUM)
if(NOT (EXPECTED_CHECKSUM STREQUAL OBTAINED_CHECKSUM))
message(STATUS "CHECKSUM MISMATCH")
message(STATUS " expected: ${EXPECTED_CHECKSUM}")
message(STATUS " obtained: ${OBTAINED_CHECKSUM}")
message(FATAL_ERROR "Verify ${PREFIX} archive - fail")
endif(NOT (EXPECTED_CHECKSUM STREQUAL OBTAINED_CHECKSUM))
message(STATUS "Verify ${PREFIX} archive - done")
endif(ARG_CHECKSUM)
message("-- Extract ${PREFIX}")
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xfz "${DOWNLOAD_PATH}"
WORKING_DIRECTORY "${TMP_DIR}")
file(REMOVE "${DOWNLOAD_PATH}")
message("-- Extract ${PREFIX} - done")
message("-- Cleanup ${PREFIX}")
file(GLOB contents "${TMP_DIR}/*")
list(LENGTH contents n)
if(NOT n EQUAL 1 OR NOT IS_DIRECTORY "${contents}")
set(contents "${TMP_DIR}")
endif()
get_filename_component(contents ${contents} ABSOLUTE)
file(RENAME ${contents} "${OUT_DIR}")
file(REMOVE_RECURSE "${TMP_DIR}")
file(WRITE "${STAMP_PATH}" "${URL}")
message("-- Cleanup ${PREFIX} - done")
endif()
set(${PREFIX}_SOURCE_DIR "${OUT_DIR}" PARENT_SCOPE)
endfunction(ExternalSource_Download)
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