We are very happy with the GitLab Mattermost integration and we get all events to issues in GitLab as new messages in Mattermost. This is done by enabling the Slack service in the GitLab project and configuring the inbound hook for the right channel in Mattermost. Nice and easy.
Now, it is tempting in Mattermost to reply to content of such messages in Mattermost. The whole team can see those replies and even a discussion could follow out of this. However, we would rather prefer to have issue related discussions as comments in GitLab - and that's why we are looking for a solution like this:
If there is a message in Mattermost that was sent by GitLab and is issue related, each reply in Mattermost should be pushed back as a new comment to that issue into GitLab. Is that possible? Maybe this is something for a Hubot integration but I was wondering if someone has already done this and wanted to share their implementation details.