Enable cross-projects CI

I have a main project in gitlab that depends to others projects.
CICD is activated for this main project.
The Dockerfile pulls the code from other projects to build the image.
What I want to do is when someone pushes new code to others projects, the pipeline of the main projects starts automatically to rebuild the image with the new code.
I read in the gitlab docs that this feature is called cross-projects CI, but there is no rich documentation or even examples. Can someone help me to activate this!
Many thanks!


Just a note that if we are talking about the same feature, multi-project pipeline, as mentioned in the docs, it is a GitLab Premium/Silver feature.

If you are in a paid plan, feel free to use Customer Support for a guaranteed response time (you’re most welcome to ask questions in the forum too, though :slight_smile: )