How to detect compiler warnings in gitlab CI

问题

In the steps of setting up CI builds on our gitlab server, I can't seem to find information on how to set up the detection of compiler warnings. Example build output:

[100%] Building CXX object somefile.cpp.o
/home/gitlab-runner/builds/XXXXXXX/0/group/project/src/somefile.cpp:14:2: warning: #warning ("This is a warning to test gitlab") [-Wcpp]
 #warning("This is a warning to test gitlab")
 ^

However the build result is success instead of warning or something similar. Ideally the results wuold also be visible on the merge request on the feature (and block the merge if possible).

I can't imagine I'm the only one trying to achieve this, so I am probably looking in the wrong direction. The 'best' solution I found is to somehow manually parse the build output and generate a JUnit report.

How would I go about doing this without allowing the build job to fail, since I would like the job to fail when compiler errors occur.

Update

For anyone stumbling across this question later, and in lieu of a best practice, this is how I solved it:

stages:
  - build
  - check-warnings

shellinspector:
  stage: build
  script:
    - cmake -Bcmake-build -S.
    - make -C cmake-build > >(tee make.output) 2> >(tee make.error)
  artifacts:
    paths:
      - make.output
      - make.error
    expire_in: 1 week

analyse build:
  stage: check-warnings
  script:
    - "if [[ $(cat make.error | grep warning -i) ]]; then cat make.error; exit 1; fi"
  allow_failure: true

This stores the build output errors in make.error in the first stage, the next stage then queries that file for warnings and fails that stage with allow_failure: true to create the passed with warning pipeline status I was looking for.

回答1:

It seems that the solution to such need (e.g., see the issue "Add new CI state: has-warnings" https://gitlab.com/gitlab-org/gitlab-runner/issues/1224) has been to introduce the allow_failure option so that one job can be the compilation itself, which is not allowed to fail (if it does, then the pipeline fails) and another job can be the detection of such warnings which is allowed to fail (if one is found then the pipeline will not fail).

Also the possibility of defining warning regex in the .gitlab-ci.yml has been requested but it does not exist yet.

来源：https://stackoverflow.com/questions/59680450/how-to-detect-compiler-warnings-in-gitlab-ci

标签

gcc

gitlab-ci

compiler-warnings