Gitlab hook on opening merge request

Question

I have a buildbot server and Gitlab. I could not figure out, to trigger builds whenever a merge request is opened on Gitlab. The purpose should be, that buildbot writes a comment back to the merge request whenever a build succeeds or fails (where as the build is done on the merge request + the upstream branch).

Any hints how to trigger that?

Thanks!

Answer 1

The Gitlab team actually merged some stuff in to make it possible to fire web hooks whenever a merge request is opened or updated: see https://github.com/gitlabhq/gitlabhq/pull/5881 and https://github.com/gitlabhq/gitlabhq/issues/1137

Answer 2

You could implement a service like the one for GitLab CI. This actually posts back to the merge-request whether GitLab CI passed or failed the test-suite.

Answer 3

I implemented one and am contributing it back to the buildbot project, see https://github.com/buildbot/buildbot/pull/1820

It uses webhooks and posts comments back to the merge request to show build status.