jamis/rbenv-gemset — pull request #23 by halorgium (2012-03-26 05:33:59+00:00)
Title: Add an option for requiring that gemsets be used

I prefer to enforce the use of isolated gem environments.
This aborts the `rbenv-exec` if no gemsets are defined.

``` shell
% RBENV_GEMSET_ENFORCED=yes rbenv exec ruby --copyright
aborting; gemsets are being enforced
```

I am not sure if it should be possible to set this to `no` and for the feature to be disabled.

``` shell
% RBENV_GEMSET_ENFORCED=no rbenv exec ruby --copyright
ruby - Copyright (C) 1993-2011 Yukihiro Matsumoto
```