Redmine

I don't think this would work. Sometimes, gem requirements change with a new versions, so the update would have to take care of that too. Also, there are so many possible ways to run RoR apps, I don't think this would be manageable at all.

Updates are really easy to do, especially if you use svn or git. Just execute svn update or git pull, run the database migrations, restart the web server and that's it. Most plugins can be updated in the exact same manner.

The Upgrade Guide explains everything in detail.

Is the realization still not possible or applicable?

Updates are really easy to do, especially if you use svn or git. Just execute svn update or git pull, run the database migrations, restart the web server and that's it. Most plugins can be updated in the exact same manner.

Is this true? It seems to me this is true within a certain version range (3.0.x). But not for 3.0.x to 3.1.x. Or am I wrong?

Each time a new version comes out it makes me happy but also it annoys me a bit to actually do it. So often I skip new releases in order to avoid the troubles.

It would be a major feature of Redmine if updates could be applied with single click. Considering updates of plugins as well!

+1