Better factored workflow

[rufuspollock]

Current issues:

• No way to do post processing of information
• Pre-processing is wrapped up in prompting and is sort of hacky
• loading and writing of datapackage.json is not separate from the creation of datapackage.json

Proposal

Steps we need to perform (not necessarily in order)

• Generate defaults (possibly given a directory)
• Definition of things to ask (interactive)
  • Use current values (defaults or load of current dp.json)
    • initial values (given directory or some other info)
  • Output: array of questions [ ... ]
• Post-processing (e.g. analyse urls to look at it)
  • dp.json plus some context (e.g. path to the directory, data files to add ...)
• Final confirmation and write of the file (e.g. to disk)
  • This is probably outside of this library

In more complex scenario would loop steps 2 + 3 (e.g. answer to one item, would result in post-processing (e.g. analysis of data file that could alter what we ask ...)

Note: simplest possible right now would just be to have defaults function (ignore prompting etc etc ...)

Use cases

• Create - no datapackage.json exists
• Update existing datapackage.json
  • should we add defaults ??
  • specifically to add data resources