Git repository on this server

Repositories on rtime server are managed by Gitolite tool, which allows to conveniently manage repository permissions. World readable repositories can be browsed online.

In addition to gitolite repositories, users with shell account can create Git repositories in their home directory. This does not require any coordination with the administrator.

Getting write access to repositories

Write access to the repositories can only be given to users who send the following information to the administrator:

1. OpenSSH public key
2. Login name (for ČVUT people) or email address (for others).

SSH key creation

The SSH key can be created with one of the following ways. Note that under Windows, methods 1 and 2 only work if OpenSSH has been selected during Git installation.

1. Under Linux/Unix (or in Git Bash under Windows) run:

   ssh-keygen

2. In Git Gui (under Linux or Windows) choose Help -> Show SSH key -> Generate key.
3. Under Windows use PuTTYgen. Use this if you have chosen to use Plink during Git installation.

It is stored by default at ~/.ssh/id_rsa.pub.

Password-protected keys

During the key creation you will be asked for a passphrase. If you do not specify any passphrase, anybody with access to your ~/.ssh directory could access your repositories. If you specify the passphrase, it will need to be entered whenever you want to push to or pull from the server. By using ssh-add command (or Pageant program under Windows) you can specify the passphrase only once and the decrypted key will be remembered in the memory.

Creating repositories

There are two ways how a repository can be created:

1. Send an email to the administrator with the name of the repository, a short description and a list of people (login or email) who should have access to the repository. The administrator creates the repository for you and notifies you when it's done.
2. Our group staff members can create their repositories without asking the administrator. See below.

Automatic creation of repositories (staff members only)

It is simply a matter of pushing the repository to a special URL containing the login, like this:

git push --set-upstream ssh://git@rtime.felk.cvut.cz/«login»/«whatever» HEAD

This will create a new repository called «whatever» (if it does not exist yet) and push the current HEAD to it. It also makes this repository the default for pushing and pulling (this is what --set-upstream does).

Such repository is by default accessible only to the creator. If you want this repository to be public, run

ssh git@rtime.felk.cvut.cz perms «login»/«whatever» + READERS @all

If you want to set a Gitweb description for public repositories created this way, use gitolite's desc commands. I.e. you can set the description by:

ssh git@rtime.felk.cvut.cz desc «login»/«whatever» "Description"

Accessing the repository

After installing Git on your local computer, you can access the repository as follows.

Cloning the repository

Read/Write access (for users with registered SSH key):

git clone ssh://git@rtime.felk.cvut.cz/repo-name

Read-only access (for public repositories only):

git clone git://rtime.felk.cvut.cz/repo-name.git
git clone http://rtime.felk.cvut.cz/git/repo-name.git

First push to admin-created repositories

After an empty repository is created by the admin, you can push (i.e. upload) the data to it:

• Clone the empty repository.
• Put your sources into your cloned repository

git add .             # tells git to track all files in your project
git commit            # commits the added files to the repository

• Push your sources to the server

git push

Pushing to non-master branches

If you are not allowed to push to the master branch but to a different one, you have to push like this:

git push origin master:your-branch

which pushes your local master branch to the remote branch your-branch.

To make this behavior default run

git config remote.origin.push master:your-branch

And from now on, it is sufficient to run only

git push

Managing repositories

Finding available repositories

You can find the list of repositories you have access to by running:

ssh git@rtime.felk.cvut.cz info [filter]

where filter is optional string used to filter the list.

Permissions to automatic repositories

The owners of automatically created repositories can manage the access permissions by themselves.

The current permissions can be listed by:

ssh git@rtime.felk.cvut.cz perms -l «repo»

You can add permissions for either reading of writing the repo with:

ssh git@rtime.felk.cvut.cz perms «repo» + READERS «login»
ssh git@rtime.felk.cvut.cz perms «repo» + WRITERS «login»

The permissions can be removed by replacing + with -.

To make your repository visible on gitweb, run:

ssh git@rtime.felk.cvut.cz perms «repo» + READERS @all

Links to git related documents

• Gitolite documentation on DCE IT pages