当使用cmake + ninja构建时，GTest的输出没有颜色，并自动执行 [英] GTest's output has no colors when built with cmake+ninja and executed automatically

问题描述

我试图配置CMake和忍者作为我的项目的构建系统。除了应用程序本身，我有一个额外的可执行程序由gtest供电的单元测试。我认为这将是很好，让他们自动执行时，他们建立。

I'm trying to configure CMake and ninja as a build system for my project. Except the app itself I have an extra executable for unit tests powered by gtest. I thought it would be nice to have them executed automatically whenever they are built. Here's how I made it:

├── build
└── source
    ├── CMakeLists.txt
    ├── main.cc
    └── ut
        ├── CMakeLists.txt
        ├── gtest
        │   ├── ...
        └── ut.cc

source / CMakeLists.txt ...

source/CMakeLists.txt...

cmake_minimum_required (VERSION 2.6)
project (trial)
add_subdirectory(ut)
add_executable(trial main.cc)

... and source / ut / CMakeLists.txt：

...and source/ut/CMakeLists.txt:

add_subdirectory(gtest)
include_directories ("gtest/include")

add_executable(ut ut.cc)
target_link_libraries(ut LINK_PUBLIC gtest_main)

add_custom_target(run_uts
                  COMMAND ut
                  DEPENDS ut
                  WORKING_DIRECTORY ${CMAKE_PROJECT_DIR}
                 )

现在当我构建它，即：

cd build
cmake -GNinja ../source
ninja run_uts

$ b b

它工作正常，除了输出是无色的。当我用手运行ut二进制，即 build / ut / ut 我得到好的绿色和红色的颜色。

It works fine except that the output is colorless. When I run the ut binary by hand, i.e. build/ut/ut I get nice green and red colors. The colors are also there when I use Unix Makefiles as a genrator for CMake.

因为我只学习CMake，有一些我错过了或是一个问题， Ninja？

Since I'm only learning CMake, is there something I missed or is it an issue with Ninja?

推荐答案

我假设您的自动化代码运行一个gtest可执行文件，并将输出定向到一个文件。默认情况下，gtest仅在将输出发送到终端时才添加颜色序列。为了强制它添加颜色序列到输出发送到文件或管道，运行测试可执行文件与 - gtest_color = yes 选择。

I assume your automated code runs a gtest executable and directs the output to a file. By default, gtest adds color sequences only when sending output to a terminal. In order to force it to add color sequences to output sent to a file or a pipe, run your test executable with the --gtest_color=yes option.

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