I've found the (a?) documentation page for these: https://docs.gitlab.com/ee/ci/pipelines/merged_results_pipelines.html
And I've found the check-box in the settings:
But I'm not clear on whether this setting will:
- enable a feature that we can reference in the yaml config file, and use it to create additional pipelines that run on an MR, as well as retaining our existing pipelines that run targetting the actual commit that's been pushed?
or
- change all of the existing CI pipelines to now run on the merged result, instead of the direct commit.
If it's the former ... then how do I actually create such a pipeline - I can't see anything about how to configure these in the yaml file?