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get_cpm: Recover from failed download (#426)

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* get_cpm: Recover from failed download

If the download fails during the cmake config step
an empty `CPM_<version>.cmake` file is created.
So far the script only checks the files existence,
so there is no second try until the empty file is deleted manually.

This adds a check if the file is empty
and resumes the download on next config if it is.

* More descriptive function name
This commit is contained in:
haenkel
2022-11-29 18:30:22 +01:00
committed by GitHub
parent c53417bd65
commit 1184a6e6e7
1 changed files with 12 additions and 1 deletions
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13
cmake/get_cpm.cmake
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@@ -10,12 +10,23 @@ endif()
# Expand relative path. This is important if the provided path contains a tilde (~)
get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
function(download_cpm)
message(STATUS "Downloading CPM.cmake to ${CPM_DOWNLOAD_LOCATION}")
file(DOWNLOAD
https://github.com/cpm-cmake/CPM.cmake/releases/download/v${CPM_DOWNLOAD_VERSION}/CPM.cmake
${CPM_DOWNLOAD_LOCATION}
)
endfunction()
if(NOT (EXISTS ${CPM_DOWNLOAD_LOCATION}))
download_cpm()
else()
# resume download if it previously failed
file(READ ${CPM_DOWNLOAD_LOCATION} check)
if("${check}" STREQUAL "")
download_cpm()
endif()
endif()
include(${CPM_DOWNLOAD_LOCATION})