26 lines
1.1 KiB
CMake
26 lines
1.1 KiB
CMake
cmake_minimum_required(VERSION 3.6)
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project(nlohmann-json-download NONE)
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include(ExternalProject)
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ExternalProject_Add(
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nlohmann_json
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PREFIX .
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# We do not use 'GIT_REPOSITORY' as it doesn't support a shallow clone of a specific commit,
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# this make the clone step very long, so we clone by ourselves (See https://gitlab.kitware.com/cmake/cmake/-/issues/17770).
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# Adding detachedHead=false to avoid warnings like: "You are in 'detached HEAD' state..."
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# 'remove_directory' is working but cound as deprecated from cmake version 3.17,
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# Once we have a minimal version support of cmake 3.17, we can switch the command to rm -rF
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DOWNLOAD_COMMAND "${CMAKE_COMMAND}" -E remove_directory "${CMAKE_BINARY_DIR}/third-party/json"
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COMMAND git clone -c advice.detachedHead=false --branch v3.11.3 https://github.com/nlohmann/json.git --depth 1 json
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DOWNLOAD_DIR "${CMAKE_BINARY_DIR}/third-party/"
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# Override default steps with no action, we just want the clone step.
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UPDATE_COMMAND ""
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CONFIGURE_COMMAND ""
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BUILD_COMMAND ""
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INSTALL_COMMAND ""
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)
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