Fix Catch.cmake helper by setting variable globally - #2119
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Set `_CATCH_DISCOVER_TESTS_SCRIPT` helper variable globally. Otherwise in a
scoped call (like `add_subdirectory()`) the variable gets lost. This lost
variable results in a post build error with not much information to lead to the
root of the problem.
This enables the usage of the helper script with the following example structure
- CMakeLists.txt (project root with `add_subdirectory(external/catch2)`
- external/catch2
- CMakeLists.txt (contents listed below)
- contrib/Catch.cmake
- contrib/CatchAddTests.cmake
- catch2/catch.hpp
- tests
- CMakeLists.txt (add tests with `catch_discover_tests(${PROJECT_NAME})`)
contents of project specific helper `external/catch2/CMakeLists.txt`
```cmake
cmake_minimum_required (VERSION 3.1...${CMAKE_VERSION})
project(Catch2 LANGUAGES CXX VERSION 2.13.3)
add_library(Catch2 INTERFACE)
target_include_directories(Catch2
INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}>
)
# provide a namespaced alias for clients to 'link' against if catch is included as a sub-project
add_library(Catch2::Catch2 ALIAS Catch2)
include(contrib/Catch.cmake)
```
Codecov Report
@@ Coverage Diff @@
## v2.x #2119 +/- ##
=======================================
Coverage 88.79% 88.79%
=======================================
Files 138 138
Lines 5683 5683
=======================================
Hits 5046 5046
Misses 637 637 |
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Description
Set
_CATCH_DISCOVER_TESTS_SCRIPThelper variable globally. Otherwise in ascoped call (like
add_subdirectory()) the variable gets lost. This lostvariable results in a post build error with not much information to lead to the
root of the problem.
This enables the usage of the helper script with the following example structure
add_subdirectory(external/catch2)catch_discover_tests(${PROJECT_NAME}))contents of project specific helper
external/catch2/CMakeLists.txt