Questions for Git users

Thu, Feb 24, 2011 01:36 PM
So, we have been using Subversion for a long time. We are very comfortable with it. We know how it works. Even when things go sideways, we have people here that understand it and can set things straight again. But, we do find some things lacking. I had an SVN conflict today where the diff showed the problem to be that I was replacing nothing with something. That was a conflict. Sigh. Also, it is getting slower and slower as time passes. Committing or updating my code base can take long enough that I start checking email and forget I was committing something. So, we are thinking about a switch. I use GitHub for some of my OSS software I have released. I like GitHub a lot. I find the Git command line tool a little confusing (commit -a seems silly for example). But, I figure I can get over that. I am going to end up wrapping it up in our merge and deploy tools anyway. But, I have some questions for people that use Git on a daily basis. I have searched around and there is either more than one answer or no answers to these things.

How big is your repository?

We have 1,610 directories and 10,215 files in our code library. How does Git deal with repositories that size?

What are you using for a Git server?

From what I can tell, there is no server component to Git. I think I understand that you can use a shared Git use and allow ssh keys to access it that way? Or there are some other 3rd party projects that act as a Git server. We currently use Apache+SVN which lets us A) Use our LDAP server and B) control access to parts of the repository using Apache configuration. It looks like we would lose the LDAP for sure but maybe something like Gitolite would allow us to do some auth/acl stuff. Maybe we could dump our LDAP data on a schedule to something it can read.

What is your commit, push, deploy procedure?

This is really aimed at the guys doing continuous deployment in a web application with Git. Our current methodology is that each developer has a branch. They commit to their branch. When a set of commits is ready for release, they push it to trunk. In a staging environment, the changeset in trunk is merged with the production branch. That branch is then rolled to the servers. We like having the 3 layers. It lets us review changes in one place (trunk) for large commits. Meaning there can be 10 commits in a developer's branch, but when all the changes are merged into trunk (using one SVN merge of course) you get one nice neat commit in the trunk branch that can easily be evaluated. It also lets users collaborate easily by committing changes to trunk that others may need. Other users can just merge back from trunk to get the changes. From what I have read or heard people talking about, this seems to fly in the face of how Git works. Or, at least what Git is good at. Also, I think the way Git works, 10 commits in a branch would merge as 10 commits in trunk. So, we would lose the unification of a lot of little changes getting merged into one change. Some of our developers will use their branch to commit things in progress and not at a finished point. So, by the time they are done, we will have 10+ commits for one task. Any input here?

What are you using for visualization?

We use Trac. We love and hate Trac. Its good enough. I know Redmine supports Git natively and I know there is a Trac Hack for making Trac support it. Anything else? Any comments on Redmine?

Any tips for importing from Subversion?

I tried importing our Subversion repos into Git using svn2git. It got hung up on some circular branch reference or something. The error message was confusing. So, I guess if we do migrate, we will be starting with little to no history. Perhaps we just import our current production branch and start from there. Any tips?