Prompt to select instance from list

[jcam]

This is a feature I find myself using pretty often, because the instance "name" is typically the same for multiple instances in an autoscaling group.

[mludvig]

Hi Jesse
Thanks for the PR. Two thoughts on that:

1. If this is merged it should be consistent across all the tools and all the modes of operation. For example it's quite counter-intuitive to support this only when more than one instance matches. Why not support interactive selection without any instance selection at all (i.e. list them all and let me pick). And it should work the same in ecs-session when selecting containers to connect to.
2. It should be an optional behaviour, e.g. with --interactive / -i or maybe optionally disabled with --no-interactive for use in scripts.

Also I believe there are some libraries that can make such menu selection more user friendly, something like the node.js menu system where one can use cursor keys to make the selection.

What do you think?

[jcam]

I guess I was trying to make only limited scope changes. if exactly one instance matches then why prompt to pick it?
Interactive selection without any select (list all) seems like a reasonable change
making it optional (so it doesn't break scripts) seems reasonable as well.

is it just this and ecs-session that would leverage this? i could update that to match.

As for more-user-friendly menu selection, if you have one you recommend that won't add a massive amount to the library, sure, i was going for simplest with what is already in it.