Eco is a prototype editor for editing composed languages. It is not feature complete, it is not intended for production, and it does have bugs. Eco is distributed under a BSD/MIT license.

At a minimum you will need to install:

• Python 2.7 https://www.python.org/download/
• PyQT4 http://www.riverbankcomputing.co.uk/software/pyqt/download
• Py http://pylib.readthedocs.org/en/latest/install.html

On Unix machines, you can reasonably expect your distribution to have packages for Python and PyQT4. You may need to install Py using Pip or similar (see the link above).

If you wish to see visualisations of parse trees, you may optionally install:

• GraphViz http://www.graphviz.org/Download.php
• PyDot https://code.google.com/p/pydot/

To run Eco, use the bin/eco file:

$ bin/eco