Add a fallback to inline environment when path doesn't exist

[josephglanville]

This is a feature proposal PoC for #636

It allows a user to reference an inline environment by name if it's present in the current working directory.
i.e instead of:

tk status --name stage/service main.jsonnet

Can simply write:

tk status stage/service

Because this patch replaces the path with the current working directory the standard enumeration logic will be used to discover the environment.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[josephglanville]

Bump to drop stale.

[julienduchesne]

👍 I have no objection for this feature. I'd like to see some testing around it though. There's already a few tests in load_test.go that you can inspire yourself from

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[josephglanville]

Bump to drop stale. I will look at adding some tests.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[josephglanville]

Bump to drop stale, haven't had chance to add tests to this yet.

[julienduchesne]

I added tests and a better error message in case multiple envs are found. Since I added code, I'll ask for another approval from my team

[the-it]

looks good to me

[julienduchesne]

Thanks for your contribution @josephglanville!