= virtualenv =
[[TOC]]
Using [http://pypi.python.org/pypi/virtualenv virtualenv] allows multiple Python applications to each have an independent set of Libraries to allow easier management of dependencies.

== Install Non-Python Dependencies ==
You need to install {{{libxml2, python-devel, and libgeos_c}}}.

On Ubuntu, you can do this by running:
{{{
sudo apt-get install libxml2 libxml2-dev libxslt1-dev python-dev libgeos-c1 libfreetype6-dev
}}}


== Install Python virtualenv == 

On linux install the virtualenv package using your package manager.

Ubuntu/debian:

{{{
aptitude install python-virtualenv
}}}

Windows:
1. Install setup tools from [http://pypi.python.org/pypi/setuptools]
2. Use easy_install to install virtualenv
{{{
easy_install virtualenv
}}}

== Using virtualenv == 

1. Create a new virtualenv for your application

{{{
virtualenv dependencydirectory
}}}

   The above creates a directory called dependencydirectory and initializes a new virtualenv inside it.

2. Activate the virtualenv

   On Linux/MacOSX/*ix:
{{{
source dependencydirectory/bin/activate
}}}

   On Windows:
{{{
dependencydirectory\scripts\activate
}}}

'''
   Note: Steps 4 works only after step 2 has been executed in the current terminal.'''

3. Download the required web2py version and place eden in the applications directory.

4. Use the requirements.txt in the eden directory to install the dependencies

{{{
pip install -U -r requirements.txt
}}}

5. Run web2py for development within this environment.

{{{
python web2py.py 
}}}

== Using a virtualenv with apache/mod_wsgi ==

Append the following to WSGIDaemonProcess in the config:
{{{
 python-path=/home/web2py/dependencydirectory/lib/python2.6/site-packages
}}} 
'''

You can find further configuration details here -> [http://code.google.com/p/modwsgi/wiki/VirtualEnvironments]

'''
Note: In the line above change python2.6 to your python version and the directory to match your directory'''

== Using a virtualenv with uwsgi ==

Add -H path_to_dependencydirectory to your uwsgi parameters

You can find further details on this at -> [http://projects.unbit.it/uwsgi/wiki/VirtualEnv]

== Optional: Use virtualenvwrapper == 
It's possible to use [http://www.doughellmann.com/projects/virtualenvwrapper/ virtualenvwrapper], to simplify the installation process. The below instructions assume that you have installed and configured virtualenvwrapper.

=== Create and Activate the VirtualEnv ===
Create the virtualenv by running
{{{
mkvirtualenv --no-site-packages sahana-eden
}}}

This will automatically run
{{{
workon sahana-eden
}}}
which activates the virtualenv, by setting the necessary environment variables.

=== Download Web2Py and Sahana Eden ===
This can be installed anywhere, no need for it to be in the !VirtualEnv folder

See wiki:InstallationGuidelinesDeveloper#Web2Py for instructions.

=== Install Python Dependencies with Pip ===
{{{
cd web2py/applications/eden
pip install -r requirements.txt
}}}

=== Running Sahana Eden ===
Switch to your virtualenv by running
{{{
workon sahana-eden
}}}
and start web2py and Sahana Eden as usual, by running
{{{
./web2py
}}}