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.. _environment:
Setting up a development environment
====================================
This document covers how to get an enviroment ready to contribute code to the LEAP Client.
Cloning the repo
----------------
.. note::
Stable releases will be in *master* branch (nothing there yet, move on!).
Development code lives in *develop* branch.
::
git clone git://leap.se/leap_client
Base Dependencies
------------------
Leap client depends on these libraries:
* `python 2.6 or 2.7`
* `qt4` libraries (see also :ref:`Troubleshooting PyQt install <pyqtvirtualenv>` about how to install inside your virtualenv)
* `libgnutls`
* `openvpn<http://openvpn.net/index.php/open-source/345-openvpn-project.html>`_
Debian
^^^^^^
In debian-based systems::
$ apt-get install openvpn python-qt4 python-crypto python-gnutls
To install the software from sources::
$ apt-get install python-pip python-dev libgnutls-dev
.. _virtualenv:
Working with virtualenv
-----------------------
Intro
^^^^^^^^^^^^^^^^^^^
*Virtualenv* is the *Virtual Python Environment builder*.
It is a tool to create isolated Python environments.
The basic problem being addressed is one of dependencies and versions, and indirectly permissions. Imagine you have an application that needs version 1 of LibFoo, but another application requires version 2. How can you use both these applications? If you install everything into /usr/lib/python2.7/site-packages (or whatever your platform's standard location is), it's easy to end up in a situation where you unintentionally upgrade an application that shouldn't be upgraded.
Read more about it in the `project documentation page <http://pypi.python.org/pypi/virtualenv/>`_.
Create and activate your dev environment
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
::
$ virtualenv </path/to/new/environment>
$ source </path/to/new/environment>/bin/activate
Install python dependencies
^^^^^^^^^^^^^^^^^^^^^^^^^^^
You can install python dependencies with pip. If you do it inside your working environment, they will be installed avoiding the need for administrative permissions::
$ pip install -r pkg/requirements.pip
.. _pyqtvirtualenv:
Troubleshooting PyQt install inside a virtualenv
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you attempt to install PyQt inside a virtualenv using pip, it will fail because PyQt4 does not use the standard setup.py mechanism.
As a workaround, you can run the following script after creating your virtualenv. It will symlink to your global PyQt installation (*this is the recommended way if you are running a debian-based system*)::
$ pkg/postmkvenv.sh
A second option if that does not work for you would be to install PyQt globally and pass the ``--site-packages`` option when you are creating your virtualenv::
$ apt-get install python-qt4
$ virtualenv --site-packages .
Or, if you prefer, you can also `download the official PyQt tarball <http://www.riverbankcomputing.com/software/pyqt/download>`_ and execute ``configure.py`` in the root folder of their distribution, which generates a ``Makefile``::
$ python configure.py
$ make && make install
.. note::
this section could be completed with useful options that can be passed to the virtualenv command (e.g., to make portable paths, site-packages, ...).
.. _copyscriptfiles:
Copy script files
-----------------
The openvpn invocation expects some files to be in place. If you have not installed `leap-client` from a debian package, you must copy these files manually::
$ sudo mkdir -p /etc/leap
$ sudo cp pkg/linux/resolv-update /etc/leap
.. _policykit:
Running openvpn without root privileges
---------------------------------------
In linux, we are using ``policykit`` to be able to run openvpn without root privileges, and a policy file is needed to be installed for that to be possible.
The setup script tries to install the policy file when installing the client system-wide, so if you have installed the client in your global site-packages at least once it should have copied this file for you.
If you *only* are running the client from inside a virtualenv, you will need to copy this file by hand::
$ sudo cp pkg/linux/polkit/net.openvpn.gui.leap.policy /usr/share/polkit-1/actions/
Missing Authentication agent
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you are running a desktop other than gnome or unity, you might get an error saying that you are not running the authentication agent. You can launch it like this::
/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1 &
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