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# (C) Copyright 2011- ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation
# nor does it submit to any jurisdiction.
##############################################################################
#.rst:
#
# ecbuild_download_resource
# =========================
#
# Download a file from a given URL and save to FILE at configure time. ::
#
# ecbuild_download_resource( FILE URL )
#
# curl or wget is required (curl is preferred if available).
#
# The default timeout is 30 seconds, which can be overridden with
# ``ECBUILD_DOWNLOAD_TIMEOUT``. Downloads are by default only tried once, use
# ``ECBUILD_DOWNLOAD_RETRIES`` to set the number of retries.
#
##############################################################################
function( ecbuild_download_resource _p_OUT _p_URL )
# Do not retry downloads by default (ECBUILD-307)
if( NOT DEFINED ECBUILD_DOWNLOAD_RETRIES )
set( ECBUILD_DOWNLOAD_RETRIES 0 )
endif()
# Use default timeout of 30s if not specified (ECBUILD-307)
if( NOT DEFINED ECBUILD_DOWNLOAD_TIMEOUT )
set( ECBUILD_DOWNLOAD_TIMEOUT 30 )
endif()
if( NOT EXISTS ${_p_OUT} )
find_program( CURL_PROGRAM curl )
mark_as_advanced(CURL_PROGRAM)
if( CURL_PROGRAM )
execute_process( COMMAND ${CURL_PROGRAM} --silent --show-error --fail
--retry ${ECBUILD_DOWNLOAD_RETRIES}
--connect-timeout ${ECBUILD_DOWNLOAD_TIMEOUT}
--output ${_p_OUT} ${_p_URL}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} RESULT_VARIABLE CMD_RESULT )
else()
find_program( WGET_PROGRAM wget )
if( WGET_PROGRAM )
# wget takes the total number of tries, curl the number or retries
math( EXPR ECBUILD_DOWNLOAD_RETRIES ${ECBUILD_DOWNLOAD_RETRIES} + 1 )
execute_process( COMMAND ${WGET_PROGRAM} -nv -O ${_p_OUT}
-t ${ECBUILD_DOWNLOAD_RETRIES}
-T ${ECBUILD_DOWNLOAD_TIMEOUT} ${_p_URL}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} RESULT_VARIABLE CMD_RESULT )
else()
ecbuild_critical("Could not find curl or wget. Error downloading ${_p_URL}")
endif()
endif()
if(CMD_RESULT)
ecbuild_critical("Error downloading ${_p_URL}")
endif()
endif()
endfunction()
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