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How does one control which Ruby a gem is installed to using rbenv? Or could there be a central place accessible to all Rubies? I am just running Ruby scripts not Rails. rbenv-gemset seems to be for that?
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Rbenv is a command line tool that lets you switch between installed versions of Ruby. It can also install new versions of Ruby using the ruby-build plugin.
One of those is the ruby-build project, which also provides an optional plugin for Rbenv that provides an rbenv install subcommand. This plugin will typically install Ruby implementations in ~/. rbenv/versions/* , but that is configurable.
Use `gem install -v` You may already be familiar with gem install , but if you add the -v flag, you can specify the version of the gem to install. Using -v you can specify an exact version or use version comparators.
The gem is installed into whatever your currently selected Ruby is. E.g.
rbenv shell 2.0.0-p247
gem install bundler # bundler is installed for Ruby 2.0.0-p247 only
rbenv shell 1.9.3-p447
gem install bundler # bundler is installed for Ruby 1.9.3-p447 only
Just to add on: rbenv-gemset would be for organizing your gems within the same ruby version. Only rbenv controls which ruby you install your gems to...
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