如何根据 GitLab CI 构建脚本中的设置更改代码中的某些内容

Question

My code is written in C++
GitLab CI Compiler: MSVC2017_x64

My project is being compiled with a GitLab pipeline on a Windows server. I want to be able to compile parts of this project two times and somehow change something in the code, before it is compiled so that I will have two versions of the same application but with different predefined settings.
Something simple like the compiler setting a #define in a header or cpp file would be great.
Using this same technique, I'd also like to hard wire the build number (pipeline ID) into the application.

I've already tried the /D or -D parameter but it doesn't set a #define .

The solution needs to work no matter what the user's setup is so something like environment variables won't work.

This is my .gitlab-ci.yml file (the application is ultimately built with the qmake and nmake calls):

stages:
  - build
  - test
variables:
  GIT_SUBMODULE_STRATEGY: recursive
build:
  stage: build
  only:
    - master
  tags:
    - windows
    - qt
  script:
    - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvars64.bat"
    - call "C:\Qt\5.9.1\msvc2017_64\bin\qtenv2.bat"
    - set CL=/MP16
    - set PATH="C:\Program Files (x86)\Inno Setup 5";%PATH%
    - cd %CI_PROJECT_DIR%\(...)\Application
    - qmake CONFIG+=release
    - nmake
    - cd %CI_PROJECT_DIR%\(...)\3rdParty\Windows
    - copy (...)\Application.exe .
    - copy (...)\Application.ico .
    - windeployqt .
    - iscc InnoScript.iss

  artifacts:
    name: "%CI_COMMIT_REF_NAME%"
    expire_in: 1 month
    paths:
    - (...)\3rdParty\Windows\Application.exe

And this is how I would want it to be (with the -D mode=xy 's):

stages:
  - build
  - test
variables:
  GIT_SUBMODULE_STRATEGY: recursive
build:
  stage: build
  only:
    - master
  tags:
    - windows
    - qt
  script:
    - call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvars64.bat"
    - call "C:\Qt\5.9.1\msvc2017_64\bin\qtenv2.bat"
    - set CL=/MP16
    - set PATH="C:\Program Files (x86)\Inno Setup 5";%PATH%
    - cd %CI_PROJECT_DIR%\(...)\Application
    - qmake CONFIG+=release
    - nmake -D mode=prod
    - qmake CONFIG+=release
    - nmake -D mode=stage
    - cd %CI_PROJECT_DIR%\(...)\3rdParty\Windows
    - copy (...)\Application.exe .
    - copy (...)\Application.ico .
    - windeployqt .
    - iscc InnoScript.iss

  artifacts:
    name: "%CI_COMMIT_REF_NAME%"
    expire_in: 1 month
    paths:
    - (...)\3rdParty\Windows\Application.exe

How do I modify my code by only using the GitLab CI or is there another, better way?

Answer 1

I've just found out how to do it.

Before, I was trying to add the -D argument to the nmake call when instead, I needed to add a DEFINES+=MY_VAR='foo bar' to the qmake call.
After doing this and deleting the build- folder to get rid of the outdated Makefile.Debug and Makefile.Release files I got it to work correctly.