Implement headless importer about tonel-vast

[eMaringolo]

This is what was presented as a "strategy based" behavior to avoid prompting for versions name, base editions, prerequisites, etc.

[dalehenrich]

I know that this about the Tonel reader, but it is an area where preferences decisions could be specified in the Rowan component file (i.e., for GemStone one can specify on a per package basis, the symbol dictionary where classes will be created). Just a thought.

[eMaringolo]

Today I'm working on it, the reason for this is that the ENVY Manager tools are very UI-bound, so what I'm creating is a set of strategies that you can use, by default you have the "interactive" strategy (it is, falls back to the UI prompters, etc.), and the others are to load the latest edition (e.g. as a Base edition), use the computed prerequisites, etc.

[dalehenrich]

I understand ... but once decisions have been made it would be convenient to record them on disk (in a component?) ... with that said, being able to choose to interactively drive the decisions is also important ...

[eMaringolo]

There is an initial support for this in 56ffb41.
I'll write a doc on how to use each strategy next week.

[eMaringolo]

It is working now.