One of the applications we are developing at KNEIP is not yet migrated to Ruby 1.9 but we would like to use Rubocop anyway.
Rubocop is Ruby 1.9 only and thanks to RVM or rbenv we can use different Rubies so I created the following alias in order to be able to use in any ruby projects (no matter which ruby version is required) without installing it as a development dependency:
alias cop='rvm 2.1.0 do rubocop'
alias rcop='rvm 2.1.0 do rubocop -R'
Those aliases are using RVM and request that the installed ruby 2.1.0 execute the rubocop command with argument -R for Rails so that now I can do the following:
$ cd ~/dev/project-1/
$ cop lib/my_class.rb
Inspecting 1 file
1 file inspected, no offences detected
$ cd ~/dev/project-2/
Inspecting 29 files
29 files inspected, 1046 offences detected
And the same with
rcop for a Rails project.