I want a build job to be triggered when a merge request is raised/changed to verify merge requests. Primarily I want it to comment/annotate changes so peer review focusses on logic and warnings are clear.

I can do this with Concourse, Circle, Jenkins and Github Actions on Azure Devops, Bitbucket Cloud, Bitbucket Server & Github. All Gitlab can tell you is pass/fail, which was good in 2003 but seriously lacking in 2023.

Similarly I want the ability to trigger a release and supply a desired version for the release (or someway to achieve that since our projects follow semantic versioning).

The release DSL is incomplete and could not work on server/cloud last time I used it. The page claims it can do alot but there is a hole in it and even the writer clearly knew.

I want the ability to specify multiple reusable pipelines, in a central place. This is not possible in cloud.

Lastly I would like to have multiple potential pipelines in a repository (e.g. smoke test and release). You can hack this in via variables. This will/won't work depending specifically on the runner for your job. if self hosted or cloud you'll notice different parsing behaviour depending on what host it runs on. This is shocking.

I have an email somewhere where I went through every GitLab CI DSL and documented which didn't consistently work, which only worked consistently on cloud and which only worked on server. Also things like release that are broken on both.

The only way to make it work is to use multi stage docker builds and if your doing that build bot and a bash script would be better.