Support for rubygems 2.2 directory structure

[jacknagel]

Rubygems 2.2 can share a local gem repository among ruby versions, i.e. instead of something like ruby/2.1.0/gems, one would just have gems, with compiled extensions kept separately and organized by ABI version.

As a more concrete example, on an older project that was created prior to rubygems 2.2, I have:

$ ls -l .bundle
total 8
-rw-r--r--  1 jacknagel  staff   36 Apr 18 09:44 config
drwxr-xr-x  3 jacknagel  staff  102 Mar 18 16:02 ruby

ls -l .bundle/ruby/2.1.0
total 0
drwxr-xr-x  22 jacknagel  staff   748 Apr 16 13:01 bin
drwxr-xr-x  92 jacknagel  staff  3128 Apr 16 12:04 build_info
drwxr-xr-x   3 jacknagel  staff   102 Apr 16 12:56 bundler
drwxr-xr-x  67 jacknagel  staff  2278 Apr 16 12:56 cache
drwxr-xr-x   2 jacknagel  staff    68 Mar 18 16:03 doc
drwxr-xr-x   3 jacknagel  staff   102 Mar 18 16:03 extensions
drwxr-xr-x  66 jacknagel  staff  2244 Apr 16 12:04 gems
drwxr-xr-x  66 jacknagel  staff  2244 Apr 16 12:04 specifications

on a brand new project with rubygems 2.2 installed, I have:

$ ls -l .bundle
total 8
drwxr-xr-x   7 jacknagel  staff  238 Apr 18 10:02 bin
drwxr-xr-x  10 jacknagel  staff  340 Apr 18 10:02 build_info
drwxr-xr-x  10 jacknagel  staff  340 Apr 18 10:02 cache
-rw-r--r--   1 jacknagel  staff   36 Apr 18 10:02 config
drwxr-xr-x   2 jacknagel  staff   68 Apr 18 10:02 doc
drwxr-xr-x   3 jacknagel  staff  102 Apr 18 10:02 extensions
drwxr-xr-x  10 jacknagel  staff  340 Apr 18 10:02 gems
drwxr-xr-x  10 jacknagel  staff  340 Apr 18 10:02 specifications

This doesn't play nicely with vim-bundler's assumptions about the gem repository layout, and as such 'path' isn't set up correctly, etc.

[tpope]

At the very least I need info on the structure of compiled gems as well.

[jacknagel]

Having looked into it further, I think the rubygems 2.2 thing is a red herring. I now think this is a bug in bundler, so I've filed an issue there: rubygems/bundler#2987

Sorry for the noise.