[DRE-maint] Bug#1008932: gitlab-sidekiq cannot find graphiql-rails

[Maximilian Stein]

Package: gitlab
Version: 14.7.7+ds1-2~fto11+2
Severity: normal

Dear Maintainer,

Recently, I tried to upgrade Gitlab to 14.7.7+ds1-2~fto11+2.
Unfortunately, gitlab-sidekiq does not start afterwards but fails as
it cannot find graphiql-rails:

    gitlab-sidekiq[8334]: Could not find gem 'graphiql-rails (~> 1.8)' in any of the gem sources listed in your Gemfile

However, in /var/lib/gitlab/.gem/gems (I fixed the owner as described
in the wiki), the gem is present (in directory graphiql-rails-1.8.0).
Unfortunately, I cannot uninstall the apt package ruby-graphiql-rails
(version 1.4.10-1) as gitlab still depends on it.

So, I assumed that Gitlab finds the graphiql-rails package installed
by apt. After I had updated the Gemfile to require version 1.4 of
graphiql-rails, I can indeed successfully start gitlab-sidekiq.

With this, Gitlab starts again, however some features do not work.
Most notably, I cannot merge a morge request anymore.

Thanks for your support!

Best,
Maximilian