Should we migrate development to GitLab?

edit

From an operations standpoint GitLab's SaaS and self-hosting options are both attractive. They would solve the following issues:

• Although I liked Gerrit's "bring your own" authentication in theory, it's been crap in practice. We regularly end up with duplicate accounts which must be fixed manually.
• Bugzilla integration is currently broken due to a j2bugzilla issue.
• Buildbot integration works well, but Buildbot itself is a dead end. The version we use (0.8) only supports Python 2, but 0.9 and later appear to be geared towards internal teams instead of public projects.
• This would give us a bonus migration path away from Moin, our wiki software.

I am all for the Gitlab route. Additionally it is easier for newcomers to get used to the workflow

Reviewing the link to GitLab features posted by Dario I noted the following:

1. No blocking with negative approval to prevent a merge: https://gitlab.com/gitlab-org/gitlab-...
2. A tl;dr; issue on making GitLab better for Open Source projects: https://gitlab.com/gitlab-org/gitlab-...

As I understand it, using Gerrit, currently we do fast-forward merges, and GitLab supports this. What is the difference between this and merge commits? If it makes the history more verbose then I'm not in favour of that.

1. => Right, I forgot about that. That's feature I really miss.

You can configure gitlab MR to accept FF merges only. That means no merge commits and a linear history. Basically the same behavior we have on gerrit ATM.

I would keep Gerrit, and maybe switch from Buildbot to Jenkins. The Jenkins/Gerrit integration works quite well.

The key bits of the current setup for me are

1. Ease of interacting with Gerrit at the command line with git-review.
2. Ease of review\comment with Gerrit UI.
3. Ability to correct commit message in Gerrit UI without needing to pull \ edit \ push.

I would hope that any replacement at least offers similar capabilities otherwise I'd regard that as a regression.

One capability I would like is a link from a commit as shown on the buildbot to the associated Gerrit change. This is wanted to easily determine which change has broken a build without having to update my local repo and look for the commit by hash (which is all buildbot shows).