Use Gemfile when available

[Seanstoppable]

Order now goes:
.ruby-version
Gemfile
.tool-versions
Global asdf setting

Adapted rbenv script from https://github.com/aripollak/rbenv-bundler-ruby-version/blob/master/bin/rbenv-bundler-ruby-version
Enhanced existing script to do similar thing
Renamed script file such that it will actually do parsing

[Stratus3D]

Does this work as expected?

[Stratus3D]

I believe we need to implement a script named bin/list-legacy-filenames if we are removing this file.

[drapergeek]

Thanks @Seanstoppable for doing this, really happy to see this idea moving forward!

[drapergeek]

@Seanstoppable @Stratus3D is there anything I can to do help move this forward? My team is considering dropping the .ruby-version file so it's become more of a necessity for me. Happy to help out.

[Seanstoppable]

I believe this is complete now. travis errors seem agnostic of this branch. Just waiting for further feedback if necessary

[skipkayhil]

Any update on this? Really looking forward to this being added

[drapergeek]

@Stratus3D is there anyway we can get this reviewed/merged? There seems to be a number of people wanting this feature and it seems ready. Thanks for all you do, I know maintaining is a lot of work and I appreciate the great tooling.

[Stratus3D]

It doesn't look like rbenv supports this either: rbenv/rbenv#223. Assuming it's always a hardcoded version and not a range that's present in the Gemfile I'm fine with merging this. It's clear many would find this useful.

[Stratus3D]

@Seanstoppable can you rebase? It looks like there are more recent changes to bin/parse-legacy-file. I'll merge as soon as the conflict is resolved, or when I get a chance to fix it myself.

[drapergeek]

Thank you!