Following this tutorial [link] to install gitlab on a dedicated server. I need to :
sudo -u git -H bundle install --deployment --without development test postgre
For me, gem was complaining about pkg-config missing dependence, so I did:
sudo apt-get install pkg-config
and then
sudo gem install rugged -v '0.22.2'
after that, I revert to my older version of gitlab and re-run the script for the upgrade.
My older version of gitlab was 6.9.2 and the upgraded version 8.0.5