[RFE] Allow binary stub to support ~> version specifications

[voxik]

When I have more RSpec versions on my system and I want to execute the test suite using RSpec 2.x for example, I'd love to be able to run it such as rspec "_~> 2.0_" and the latest minor version of RSpec 2.x should be used.

[tenderlove]

Like this?

[aaron@TC ~]$ gem list rspec

*** LOCAL GEMS ***

rspec (3.1.0, 3.0.0, 2.99.0, 2.14.1)
rspec-collection_matchers (1.1.2)
rspec-core (3.1.3, 3.0.4, 2.99.2, 2.14.8)
rspec-expectations (3.1.1, 3.0.4, 2.99.2, 2.14.5)
rspec-fire (1.3.0)
rspec-mocks (3.1.0, 3.0.4, 2.99.2, 2.14.6)
rspec-rails (2.99.0, 2.14.2)
rspec-support (3.1.0, 3.0.4)
[aaron@TC ~]$ gem -v
2.4.4
[aaron@TC ~]$ rspec '_~> 2.0_' -v
2.99.2
[aaron@TC ~]$ rspec '_~> 3.0_' -v
3.1.3
[aaron@TC ~]$ rspec '_~> 3.0.0_' -v
3.0.4
[aaron@TC ~]$

[voxik]

@tenderlove yes, exactly!

[tenderlove]

@voxik ok, it works for me with rubygems 2.4.4, so I'll close this now.

[voxik]

Is it? How it could? It can't pass this line:

https://github.com/rubygems/rubygems/blob/master/lib/rubygems/installer.rb#L669

or am I missing something?