add script to determine PR target branch in GitLab CI

[SimeonEhrig]

No description provided.

[AntonReinhard]

Do we plan on having any automated tests for this functionality? I imagine it would be difficult because it would always rely on the internet and therefore would always be unstable (especially looking at the stability of github actions lately 👀 )

[SimeonEhrig]

Do we plan on having any automated tests for this functionality? I imagine it would be difficult because it would always rely on the internet and therefore would always be unstable (especially looking at the stability of github actions lately 👀 )

I have several json files, which I can add to test at least the json parser.

[AntonReinhard]

I have several json files, which I can add to test at least the json parser.

Sounds good 👍

[SimeonEhrig]

After a discussion, we decided to not add tests. There was only one pretty easy test. The rest depends on the internet. Therefore, there would be a lot of work, to modify the test infrastructure of the integrationTests package.

Instead, I uploaded some response from the GitHub API for a PR targeting a dev branch, a PR targeting a main branch and an non existing branch.