API support for managing merge request dependencies (promoted)

Problem to solve

I want to make my pipelines and automation scripts aware of these dependencies, but I can't because there is no API.

In https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/11600 + https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13506 we add blocking merge requests, rails controllers and a frontend using those controllers to control them. However, these entities should also be visible and controllable via both the REST and GraphQL APIs.

Add an API for managing merge request dependencies.

Edited May 05, 2021 by Kai Armstrong