Prompt functions

[marcooliveira]

It would be useful to provide the user with prompt functions in the task context, so he can request information to the user, if necessary. We could provide something like ctx.prompt, with a few functions.

Check https://github.com/visionmedia/commander.js/#promptmsg-fn for examples of these functions.

[marcooliveira]

Relates to #45

[satazor]

I like the API of commander and dislike this one: https://github.com/flatiron/prompt

[satazor]

After evaluating, I decided to implement a separate nodejs module for this.
We could use commander's one but we would have to depend on a lot of things just for the prompt functions. Besides that, we are using optimist instead of commander.

Check it out: https://github.com/IndigoUnited/node-promptly
It has a simple API. Everything is done, except for the password prompt.

[satazor]

Ok everything is done. Under the hood, it uses isaac's read node module.

[satazor]

@marcooliveira I'm going to integrate promptly in automaton.
Question: should we preserve the indentation when questioning things to the user or not?
If not, context.prompt = promptly, otherwise we must have a proxy to indent the prompt messages.

[marcooliveira]

Very nice! I like the module, simple as it should be ;)

Good question. Having prompts indent like logging does, can eventually put the prompt in an awkward position. Let's take a practical look at this. I think most people will only depend on user input on top tasks. Even if they read values from inner tasks, I don't think it's a must to have them indented. If this proves to be an annoyance, we can always indent later. This also makes automaton more efficient.

[satazor]

Btw I've added this in the context, but since we don't make indentation, it is context independent.
As soon as #45 is done, we can move it there or not...