| Dean Moldovan | 9693a5c | 2017-03-23 17:27:32 +0100 | [diff] [blame] | 1 | # - Find the Catch test framework or download it (single header) |
| 2 | # |
| 3 | # This is a quick module for internal use. It assumes that Catch is |
| 4 | # REQUIRED and that a minimum version is provided (not EXACT). If |
| 5 | # a suitable version isn't found locally, the single header file |
| 6 | # will be downloaded and placed in the build dir: PROJECT_BINARY_DIR. |
| 7 | # |
| 8 | # This code sets the following variables: |
| 9 | # CATCH_INCLUDE_DIR - path to catch.hpp |
| 10 | # CATCH_VERSION - version number |
| 11 | |
| 12 | if(NOT Catch_FIND_VERSION) |
| 13 | message(FATAL_ERROR "A version number must be specified.") |
| 14 | elseif(Catch_FIND_REQUIRED) |
| 15 | message(FATAL_ERROR "This module assumes Catch is not required.") |
| 16 | elseif(Catch_FIND_VERSION_EXACT) |
| 17 | message(FATAL_ERROR "Exact version numbers are not supported, only minimum.") |
| 18 | endif() |
| 19 | |
| 20 | # Extract the version number from catch.hpp |
| 21 | function(_get_catch_version) |
| 22 | file(STRINGS "${CATCH_INCLUDE_DIR}/catch.hpp" version_line REGEX "Catch v.*" LIMIT_COUNT 1) |
| 23 | if(version_line MATCHES "Catch v([0-9]+)\\.([0-9]+)\\.([0-9]+)") |
| 24 | set(CATCH_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}" PARENT_SCOPE) |
| 25 | endif() |
| 26 | endfunction() |
| 27 | |
| 28 | # Download the single-header version of Catch |
| 29 | function(_download_catch version destination_dir) |
| 30 | message(STATUS "Downloading catch v${version}...") |
| 31 | set(url https://github.com/philsquared/Catch/releases/download/v${version}/catch.hpp) |
| 32 | file(DOWNLOAD ${url} "${destination_dir}/catch.hpp" STATUS status) |
| 33 | list(GET status 0 error) |
| 34 | if(error) |
| 35 | message(FATAL_ERROR "Could not download ${url}") |
| 36 | endif() |
| 37 | set(CATCH_INCLUDE_DIR "${destination_dir}" CACHE INTERNAL "") |
| 38 | endfunction() |
| 39 | |
| 40 | # Look for catch locally |
| 41 | find_path(CATCH_INCLUDE_DIR NAMES catch.hpp PATH_SUFFIXES catch) |
| 42 | if(CATCH_INCLUDE_DIR) |
| 43 | _get_catch_version() |
| 44 | endif() |
| 45 | |
| 46 | # Download the header if it wasn't found or if it's outdated |
| 47 | if(NOT CATCH_VERSION OR CATCH_VERSION VERSION_LESS ${Catch_FIND_VERSION}) |
| 48 | if(DOWNLOAD_CATCH) |
| 49 | _download_catch(${Catch_FIND_VERSION} "${PROJECT_BINARY_DIR}/catch/") |
| 50 | _get_catch_version() |
| 51 | else() |
| 52 | set(CATCH_FOUND FALSE) |
| 53 | return() |
| 54 | endif() |
| 55 | endif() |
| 56 | |
| 57 | set(CATCH_FOUND TRUE) |