Share git using ssh server

Sharing over ssh is similar to sharing it over a filesystem.

Preparing the repository

# On the SSH server we assume /srv/git as the central repository place and will create a new project-X dir
$ cd /srv/git
$ mkdir project-X       
$ cd project-X

# now we initialize this directory
# but instead of using git init, we use  git --bare init
$ git --bare init

Pushing your local repository to the shared repository

# First go to your local repository
$ cd $HOME/project-X
# create local git
$ git init
# Then make the link to the shared repository
$ git remote add origin ssh://user@gitserver/var/git/project-X

# We push to the remote repository
$ git push origin master

Controlling access 
To have access, all users must have an account on the ssh server. So that means user-add for each user. 
Permissions are handled by filesystem permissions. You could create two groups: project-X-read, project-X-write.
To set these different group permissions you could use:

• Using extended permissions on Linux with setfacl - http://articles.techrepublic.com.com/5100-10878_11-6091748.html
• Extended permissions on MacOSX - chmod +a Groking Darwin ACLs - http://www.afp548.com/article.php?story=20050506085817850

Accessing the repository

# Another user can now clone the repository using:
$ git clone file:///share/git/project-X
# Change something
$ ....
# Commit the changes
$ git commit -a
# Push the changes to the central repository
$ git push