在未找到任何更改的情况下如何使用CircleCI进行语义发布失败

Question

I have setup a CircleCI job to run semantic-release, but I would like CircleCI to fail when no changes are found. ie when semantic-release outputs:

There are no relevant changes, so no new version is released

CircleCi snippet for the runline.

  - run:
      name: Semantic Release
      command: npm run semantic-release

Answer 1

Good question. I haven't tested this and I don't know Node.js well in order to quickly test but here's my suggestion.

grep returns an exit code of 0 if it finds something and 1 if it doesn't. Any exit code other than 0 means a failure to CircleCI. Grep's -q flag means quiet, don't output text and the && means only run if the previous command passes. So, this might work for you:

  - run:
      name: Semantic Release
      # Fail if there are no changes
      command: npm run semantic-release | grep -q "There are no relevant changes, so no new version is released." && exit 1

Again, I haven't personally tested it so I don't know how semantic-release outputs things but this might work.

Answer 2

semantic-release does not errors out in the case of no release on purpose.

If you add a commit that doesn't warrant a release (for example a commit that modify a comment in the code or the code formatting) you don't want your CI to fail.

In short, no making a release when no release is needed is a not an error case, therefore the CI should not errors out.