在不重新生成的情况下分离CI/CD中的测试生成和应用程序生成

Question

我有一个包含文件的项目：

main.cpp - application
sum.h
sum.cpp
tester.cpp - tester application

我用CMake构建它，CMakeLists.txt：

cmake_minimum_required(VERSION 3.10)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set (ProjectName hello)
project(hello VERSION 1.0)
set(SOURCES sum.h sum.cpp main.cpp)
add_executable(${ProjectName} ${SOURCES})
enable_testing()
add_executable(tester sum.h sum.cpp tester.cpp)
add_test(Tester tester)

然后我在gitlab:上设置了一个CI/CD

image: gcc
build:
stage: build
before_script:
- apt update && apt -y install make cmake libcrypto++-dev
script:
- cd SimpleCiCdForCpp
- mkdir build
- cd build
- cmake ..
- make
- ls
artifacts:
paths:
- SimpleCiCdForCpp/build/hello
- SimpleCiCdForCpp/build/tester
test:
stage: test
before_script:
- apt update && apt -y install make cmake libcrypto++-dev
script:
- ls
- cd SimpleCiCdForCpp
- cd build
- cmake ..
- make
- ctest

一切正常——我有两个应用程序：主应用程序和测试程序，测试通过。问题是，我必须在构建阶段和测试阶段构建所有内容，否则我最终会得到ctest的空测试配置。有什么好的做法可以将测试项目与主要应用程序分开吗？

Answer 1

您的CMAkeLists.txt可能如下所示：

cmake_minimum_required(VERSION 3.10)
project(hello VERSION 1.0)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
include(CTest) # Sets BUILD_TESTING=0 by default
# Do not build twice.
add_library(sum sum.cpp sum.h)
# There is already PROJECT_NAME CMake variable.
add_executable(${PROJECT_NAME} main.cpp)
target_link_libraries(${PROJECT_NAME} PRIVATE sum)
# Do not use if not needed!
if(BUILD_TESTING)
add_executable(tester tester.cpp)
target_link_libraries(tester PRIVATE sum)
# Use same name for test and executable.
add_test(COMMAND tester NAME tester)
endif()

然后：

build:
- cmake -S. -Bbuild -DBUILD_TESTING=0
- cmake --build build
artifacts:
paths:
# Cache the... cache, so that you don't rebuild!
- SimpleCiCdForCpp/build
test:
- cmake -S. -Bbuild -DBUILD_TESTING=1
- cmake --build build
# Newest syntax.
- ctest --test-dir build