捆绑安装后，Gems不在Local Gems中

Question

New machine. New rbenv install. New rbenv-gemset install. New ruby-2.0.0 install. New rails 4.0.0 app.

When I

$ bundle install

from the rails app directory, I get

Your bundle is complete!
It was installed into ./vendor/bundle

But, if I then

$ gem list

none of the gems that were supposedly installed show up.

I have run

$ rbenv rehash

Why could this be?

Additional info:

$ which bundle
/usr/local/var/rbenv/shims/bundle
$ rbenv which bundle
/usr/local/var/rbenv/versions/2.0.0-p247/bin/bundle
$ rbenv which ruby
/usr/local/var/rbenv/versions/2.0.0-p247/bin/ruby
$ ruby --version
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.4.0]
$ rbenv gemset active
blog
$ which rails
/usr/local/var/rbenv/shims/rails

Answer 1

Your default in this app is to install to vendor/bundle . You can tell this by It was installed into ./vendor/bundle text which appears after gems installation.

Bundler documentation specifies that you have to pass --system to install in system location:

--system: Install to the system location ($BUNDLE_PATH or $GEM_HOME) even
          if the bundle was previously installed somewhere else for this
          application

EDIT: More explanation is that your ruby knows only about gems installed with --system option when not using bundle exec . You can see your gems from vendor/bundle or whatever path you've chosen by running bundle exec gem list or (as Casper noticed) bundle list . Now it is your choice whether you want your gems in system location or in application directory.