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Workaround for #685: retry download failed due to TLS #686

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Workaround for #685: retry download failed due to TLS #686

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28 changes: 25 additions & 3 deletions cmake/get_cpm.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,31 @@ endif()
# Expand relative path. This is important if the provided path contains a tilde (~)
get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)

file(DOWNLOAD
https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
${CPM_DOWNLOAD_LOCATION} EXPECTED_HASH SHA256=${CPM_HASH_SUM}
file(
DOWNLOAD
https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
${CPM_DOWNLOAD_LOCATION}
EXPECTED_HASH SHA256=${CPM_HASH_SUM}
TLS_VERIFY ON
STATUS DOWNLOAD_STATUS
)

list(GET DOWNLOAD_STATUS 0 DOWNLOAD_ERRCODE)
# 35 is "SSL connect error"
if(DOWNLOAD_ERRCODE EQUAL 35)
message(
WARNING
"Could not retrieve CPM.cmake at the first tentative, retrying with TLS verification turned off."
)
# On Windows TLS issues may arise
file(
DOWNLOAD
https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
${CPM_DOWNLOAD_LOCATION}
EXPECTED_HASH SHA256=${CPM_HASH_SUM}
TLS_VERIFY OFF
STATUS DOWNLOAD_STATUS
)
endif()

include(${CPM_DOWNLOAD_LOCATION})