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| # - Find the Catch test framework or download it (single header) | |
| # | |
| # This is a quick module for internal use. It assumes that Catch is | |
| # REQUIRED and that a minimum version is provided (not EXACT). If | |
| # a suitable version isn't found locally, the single header file | |
| # will be downloaded and placed in the build dir: PROJECT_BINARY_DIR. | |
| # | |
| # This code sets the following variables: | |
| # CATCH_INCLUDE_DIR - path to catch.hpp | |
| # CATCH_VERSION - version number | |
| if(NOT Catch_FIND_VERSION) | |
| message(FATAL_ERROR "A version number must be specified.") | |
| elseif(Catch_FIND_REQUIRED) | |
| message(FATAL_ERROR "This module assumes Catch is not required.") | |
| elseif(Catch_FIND_VERSION_EXACT) | |
| message(FATAL_ERROR "Exact version numbers are not supported, only minimum.") | |
| endif() | |
| # Extract the version number from catch.hpp | |
| function(_get_catch_version) | |
| file( | |
| STRINGS "${CATCH_INCLUDE_DIR}/catch.hpp" version_line | |
| REGEX "Catch v.*" | |
| LIMIT_COUNT 1) | |
| if(version_line MATCHES "Catch v([0-9]+)\\.([0-9]+)\\.([0-9]+)") | |
| set(CATCH_VERSION | |
| "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}" | |
| PARENT_SCOPE) | |
| endif() | |
| endfunction() | |
| # Download the single-header version of Catch | |
| function(_download_catch version destination_dir) | |
| message(STATUS "Downloading catch v${version}...") | |
| set(url https://github.com/philsquared/Catch/releases/download/v${version}/catch.hpp) | |
| file(DOWNLOAD ${url} "${destination_dir}/catch.hpp" STATUS status) | |
| list(GET status 0 error) | |
| if(error) | |
| message(FATAL_ERROR "Could not download ${url}") | |
| endif() | |
| set(CATCH_INCLUDE_DIR | |
| "${destination_dir}" | |
| CACHE INTERNAL "") | |
| endfunction() | |
| # Look for catch locally | |
| find_path( | |
| CATCH_INCLUDE_DIR | |
| NAMES catch.hpp | |
| PATH_SUFFIXES catch2) | |
| if(CATCH_INCLUDE_DIR) | |
| _get_catch_version() | |
| endif() | |
| # Download the header if it wasn't found or if it's outdated | |
| if(NOT CATCH_VERSION OR CATCH_VERSION VERSION_LESS ${Catch_FIND_VERSION}) | |
| if(DOWNLOAD_CATCH) | |
| _download_catch(${Catch_FIND_VERSION} "${PROJECT_BINARY_DIR}/catch/") | |
| _get_catch_version() | |
| else() | |
| set(CATCH_FOUND FALSE) | |
| return() | |
| endif() | |
| endif() | |
| add_library(Catch2::Catch2 IMPORTED INTERFACE) | |
| set_property(TARGET Catch2::Catch2 PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${CATCH_INCLUDE_DIR}") | |
| set(CATCH_FOUND TRUE) | |