[group gitosis-admin]
writable = gitosis-admin
members = YOUR_SERVER_USER

#####
[group users]
writable = documents
members = YOUR_SERVER_USER
#####

Append what is in between ##### to the file.

Basically, we have now defined a new group called users, with write access to repository documents.
Variable member should be matched with names according to the filename of the .pub file. (The filename shall be renamed to the username the user has on the computer that will access the repository. It should be understood that this user should execute ssh-keygen on that specific computer and send the .pub file to the server onto where the git server is installed.)

my-git-server:~$ cd gitosis-admin
my-git-server:~/gitosis-admin$ cp id_rsa.pub keydir/YOUR_SERVER_USER.pub
my-git-server:~/gitosis-admin$ git add .
my-git-server:~/gitosis-admin$ git commit -a -m "Allow YOUR_SERVER_USER write access to repository documents"
my-git-server:~/gitosis-admin$ git push

Creating a repository
writable = documents defines our new repository.
To populate this repository on the server we need to execute a couple of commands and push it to git.

my-git-server:~$ mkdir documents
my-git-server:~$ cd documents
my-git-server:~/documents$ git init
my-git-server:~/documents$ git remote add origin gitosis@my-git-server:documents.git
my-git-server:~/documents$ touch helloworld.txt
my-git-server:~/documents$ git add helloworld.txt
my-git-server:~/documents$ git commit -m "first test commit"
my-git-server:~/documents$ git push origin master:refs/heads/master

Installing SparkleShare

Sparkleshare requires a few packages to be compiled. (Besides from build-essentials).

localhost:~$ sudo aptitude install gtk-sharp2 mono-devel monodevelop
libndesk-dbus-glib1.0-cil-dev libndesk-dbus1.0-cil-dev python-nautilus

Alternative 1:
Download and untar sparkleshare-0.2-beta1.tar.gz

localhost:~$ wget https://github.com/downloads/hbons/SparkleShare/sparkleshare-0.2-beta1.tar.gz
localhost:~$ tar -xvzf sparkleshare-0.2-beta1.tar.gz
localhost:~$ cd sparkleshare-0.2-beta1
localhost:~/sparkleshare$ ./configure
localhost:~/sparkleshare$ make && sudo make install

Alternative 2:
Install git, and clone repository to your local computer.

localhost:~$ sudo aptitude install git
localhost:~$ git clone https://github.com/hbons/SparkleShare.git
localhost:~$ cd SparkleShare
localhost:~/SparkleShare$ ./configure
localhost:~/SparkleShare$ make && sudo make install

Start sparkleshare from Applications->Internet->SparkleShare
Type in your name and e-mail address in the dialog that appears.

SparkleShare should now have created a public keygen that we need to upload to our server running gitosis.
From your home folder:

localhost:~$ cd .config/sparkleshare
localhost:~/.config/sparkleshare$ scp sparkleshare.user@example.com.key.pub USERNAME@my-git-server:/home/USERNAME

Log onto your server, and rename sparkleshare.user@example.com.key.pub to sparkleshare.user@localhost.pub, or just remove @example.com.key.
Add the key to your git repository and edit gitosis-admin/gitosis.conf. Commit and push the changes.

my-git-server:~$ cd gitosis-admin
my-git-server:~/gitosis-admin$ cp ~/sparkleshare.user@example.com.key.pub keydir/sparkleshare.user.pub
my-git-server:~/gitosis-admin$ git add .
my-git-server:~/gitosis-admin$ git commit -a -m "Allow sparkleshare.user write access to repository documents"
my-git-server:~/gitosis-admin$ git push

New users that should have access to a repository, should be separated with a whitespace:


[group users]
writable = documents
member = YOUR_SERVER_USER sparkleshare.USER


On your local computer, you should now be able to connect to your newly created repository by typing in the address to your server and the name of the git repository as written on the writable line (documents) in gitosis.conf file in the dialog box.

SparkleShare should now be working with your own git repository!

References: http://velt.de/blog/sven/sparkleshare-and-your-own-git-server