Unfortunately…
A good first strategy is to look at the open source code of the existing modes – for example, Python mode – or R mode (written last year).
- https://github.com/processing-r/Processing.R
- https://github.com/fjenett/coffeescript-mode-processing
- https://github.com/jdf/processing.py
Good sources of advice for specific questions might be @fjenett and @gaocegege – and, to a much lesser extent, me.
What will the mode be?
Old info: