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https://github.com/TheLartians/ModernCppStarter.git
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e77cb5b008
This is very useful in shaky network solutions. We want both a success and a failure message, to determine if the download was successful.
39 lines
1.4 KiB
CMake
39 lines
1.4 KiB
CMake
set(CPM_DOWNLOAD_VERSION 0.38.1)
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if(CPM_SOURCE_CACHE)
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set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
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elseif(DEFINED ENV{CPM_SOURCE_CACHE})
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set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
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else()
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set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
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endif()
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# Expand relative path. This is important if the provided path contains a tilde (~)
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get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
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function(download_cpm)
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message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
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file(DOWNLOAD
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https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
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${CPM_DOWNLOAD_LOCATION} STATUS CPM_DOWNLOAD_STATUS
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)
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list(GET CPM_DOWNLOAD_STATUS 0 CPM_DOWNLOAD_STATUS_CODE)
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list(GET CPM_DOWNLOAD_STATUS 1 CPM_DOWNLOAD_ERROR_MESSAGE)
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if(${CPM_DOWNLOAD_STATUS_CODE} EQUAL 0)
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message(STATUS "CPM: Download completed successfully.")
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else()
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message(FATAL_ERROR "CPM: Error occurred during download: ${CPM_DOWNLOAD_ERROR_MESSAGE}")
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endif()
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endfunction()
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if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
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download_cpm()
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else()
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# resume download if it previously failed
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file(READ ${CPM_DOWNLOAD_LOCATION} check)
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if("${check}" STREQUAL "")
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download_cpm()
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endif()
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endif()
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include(${CPM_DOWNLOAD_LOCATION})
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