Since rvm 1.19.0 there is a alternative way to specify a project related ruby version and gemset through the files
.ruby-gemset instead of the still valid use of the
.rvmrc file. The
.rvmrc is of course as before the default configuration for rvm, but it requires to be trusted, as it could contain any shell command. Further the recently supported files are compatible with other ruby version managers like rbenv or chruby.