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# Installation

Easiest is to first install the Stetl-dependencies (see below) and then install and maintain Stetl on your system as a Python package (pip is preferred).

    (sudo) pip install stetl
    or
    easy_install stetl

Alternatively you can download Stetl from Github: by cloning (preferred) or downloading: https://github.com/justb4/stetl/archive/master.zip and then install locally

    (sudo) python setup.py install

Try the examples first. This should work on Linuxes and Mac OSX. Windows installation may be more involved depending on your local Python setup. Platform-specific installations below.

You may also want to download the complete .tar.gz distro from PyPi: https://pypi.python.org/pypi/Stetl . This includes the examples and tests.

## Dependencies

Stetl depends on the following Python packages:

- GDAL bindings for Python
- psycopg2 (PostgreSQL client)
- lxml

`GDAL` requires the native GDAL/OGR tools to be installed.

`lxml` http://lxml.de/installation.html requires the native (C) libraries:

- libxslt (required by lxml)
- libxml2 (required by lxml)

When using the `Jinja2` templating filter, `Jinja2TemplatingFilter`, see http://jinja.pocoo.org:

- Python Jinja2 package

## Linux

Most packages should be able to be installed by apt-get or Python `pip` or `easy_install`.

- Optional: Python package dependencies

      sudo apt-get install python-setuptools
      sudo apt-get install python-dev
      sudo apt-get install libpq-dev

- `libxml2/libxslt` libs are usually already installed. Together with Python `lxml` the total install for `lxml` is.

      apt-get of yum install libxml2
      apt-get of yum install libxslt1.1
      apt-get of yum install python-lxml

- GDAL (http://gdal.org) with Python bindings

      apt-get of yum install gdal-bin
      apt-get of yum install python-gdal

- the PostgreSQL client library for Python `psycopg2`

      sudo easy_install psycopg2

- Python package `argparse` if you have Python < 2.7

      sudo easy_install argparse

## Windows

Best is to install GDAL and python using the OSGeo4W Installer from http://trac.osgeo.org/osgeo4w.

- Download and run the OSGeo4W Installer
- Choose `Advanced Install`
- On the `Select Packages` page expand `Commandline_Utilities` and Select from the list `gdal` and `python`
- (`psycopg2`??)
- Install `easy_install` to allow you to install `lxml`
- Download the `ez_setup.py` script
- Open the OSGeo4W Shell (Start > Programs > OSGeo4W > OSGeo4W > OSGeo4W Shell)
- Change to the folder that you downloaded `ez_setup.py` to (if you downloaded to C:Temp then run cd C:Temp)
- Install `easy_install` by running python `ez_setup.py`
- To install `lxml` with easy_install run `easy_install lxml`

Only Psycopg2 needs explicit installation. Many install via: http://www.stickpeople.com/projects/python/win-psycopg. Once the above has been installed you should have everything required to run Stetl.

Alternatively you may use Portable GIS. Still you will need to manually install psycopg2. See http://www.archaeogeek.com/portable-gis.html for details.

## Test Installation

If you installed via Python ‘pip’ you can check if you run the latest version

    stetl -h

You should get meaningful output like

    2013-09-16 18:25:12,093 util INFO running with lxml.etree, good!
    2013-09-16 18:25:12,100 util INFO running with cStringIO, fabulous!
    2013-09-16 18:25:12,122 main INFO Stetl version = 1.0.3
    usage: stetl [-h] -c  CONFIG_FILE [-s  CONFIG_SECTION] [-a  CONFIG_ARGS]

Especially check the Stetl version number.

Try running the examples when running with a downloaded distro.

    cd examples/basics
    ./runall.sh

Look for any error messages in your output.

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