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58 lines
2.1 KiB
CMake
58 lines
2.1 KiB
CMake
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# - Find the Catch test framework or download it (single header)
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#
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# This is a quick module for internal use. It assumes that Catch is
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# REQUIRED and that a minimum version is provided (not EXACT). If
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# a suitable version isn't found locally, the single header file
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# will be downloaded and placed in the build dir: PROJECT_BINARY_DIR.
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#
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# This code sets the following variables:
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# CATCH_INCLUDE_DIR - path to catch.hpp
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# CATCH_VERSION - version number
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if(NOT Catch_FIND_VERSION)
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message(FATAL_ERROR "A version number must be specified.")
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elseif(Catch_FIND_REQUIRED)
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message(FATAL_ERROR "This module assumes Catch is not required.")
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elseif(Catch_FIND_VERSION_EXACT)
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message(FATAL_ERROR "Exact version numbers are not supported, only minimum.")
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endif()
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# Extract the version number from catch.hpp
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function(_get_catch_version)
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file(STRINGS "${CATCH_INCLUDE_DIR}/catch.hpp" version_line REGEX "Catch v.*" LIMIT_COUNT 1)
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if(version_line MATCHES "Catch v([0-9]+)\\.([0-9]+)\\.([0-9]+)")
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set(CATCH_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}" PARENT_SCOPE)
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endif()
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endfunction()
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# Download the single-header version of Catch
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function(_download_catch version destination_dir)
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message(STATUS "Downloading catch v${version}...")
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set(url https://github.com/philsquared/Catch/releases/download/v${version}/catch.hpp)
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file(DOWNLOAD ${url} "${destination_dir}/catch.hpp" STATUS status)
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list(GET status 0 error)
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if(error)
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message(FATAL_ERROR "Could not download ${url}")
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endif()
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set(CATCH_INCLUDE_DIR "${destination_dir}" CACHE INTERNAL "")
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endfunction()
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# Look for catch locally
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find_path(CATCH_INCLUDE_DIR NAMES catch.hpp PATH_SUFFIXES catch)
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if(CATCH_INCLUDE_DIR)
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_get_catch_version()
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endif()
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# Download the header if it wasn't found or if it's outdated
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if(NOT CATCH_VERSION OR CATCH_VERSION VERSION_LESS ${Catch_FIND_VERSION})
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if(DOWNLOAD_CATCH)
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_download_catch(${Catch_FIND_VERSION} "${PROJECT_BINARY_DIR}/catch/")
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_get_catch_version()
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else()
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set(CATCH_FOUND FALSE)
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return()
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endif()
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endif()
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set(CATCH_FOUND TRUE)
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