glimpses/cmake/CPM.cmake

36 lines
1.1 KiB
CMake

# SPDX-FileCopyrightText: 2023 github.com/TheLartians
#
# SPDX-License-Identifier: CC0-1.0
set(CPM_DOWNLOAD_VERSION 0.37.0)
if(CPM_SOURCE_CACHE)
set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
elseif(DEFINED ENV{CPM_SOURCE_CACHE})
set(CPM_DOWNLOAD_LOCATION "$ENV{CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
else()
set(CPM_DOWNLOAD_LOCATION "${CMAKE_BINARY_DIR}/cmake/CPM_${CPM_DOWNLOAD_VERSION}.cmake")
endif()
# Expand relative path. This is important if the provided path contains a tilde (~)
get_filename_component(CPM_DOWNLOAD_LOCATION ${CPM_DOWNLOAD_LOCATION} ABSOLUTE)
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})