RVM cheatsheet

new_rails_app_cheatsheet.txt

1. Open terminal and check versions of Ruby on Rails agains production server params or to make sure you are using the mos recent stable version.
$ ruby -v
$ rvm list
$ rvm list know
$ rvm install ruby 2.2.1
$ rvm list
$ ruby -v
$ gem install rails
$ rails -v

rvm_cheatsheet

RVM home page: http://rvm.beginrescueend.com

rvm list rubies
rvm list gemsets

rvm @global do gem install ...

.ruby-version and .ruby-gemset
------

  echo "ruby-2.3.0" > ~/projects/project_name/.ruby-version
  echo "project" > ~/projects/project_name/.ruby-gemset
  

Upgrade to the latest version of rvm from github
-------------------------------------------------

  rvm update --head

Ruby on Rails 3 Tutorial says to follow this with

  rvm reload
  rvm install 1.8.7
  rvm install 1.9.2

and, if you need a patchlevel, do something like

  rvm install 1.8.7-p174

Install a given version of ruby
--------------------------------
  rvm list known
  rvm install 1.9.2

Open a new shell and rvm!
-------------------------

  rvm use 1.9.1 
  >> Switching to ruby 1.9.1 ... 

  ruby -v 
  >> ruby 1.9.1p243 (2009-07-16 revision 24175) [x86_64-linux] 

  which ruby 
  >> /home/wayne/.rvm/ruby-1.9.1-p243/bin/ruby

Make 1.9.2 default for all new shells
--------------------------------------

  rvm --default 1.9.2

Reverting to system default
----------------------------

  rvm system
  ruby -v 
  >> ruby 1.8.7 (2008-08-11 patchlevel 72) [universal-darwin10.0] 
  which ruby 
  >> /usr/bin/ruby

Installing gems in multiple ruby versions
------------------------------------------

  rvm 1.8.6,1.9.1 gem install rspec json --no-rdoc --no-ri

Starting a new project? Create a Gemset and rvmrc at the same time:

Working with gemsets
--------------------

  rvm 1.8.7                       # use the ruby to manage gemsets for
  rvm gemset create project_name  # create a gemset
  rvm gemset use project_name     # use a gemset in this ruby
  rvm gemset list                 # list gemsets in this ruby
  rvm gemset delete project_name  # delete a gemset
  rvm 1.9.1@other_project_name    # use another ruby and gemset

The global gemset
-----------------

  With every ruby, rvm creates the global gemset.  Gems installed into this
  gemset are available to all gemsets in the ruby.

    rvm 1.8.7
    rvm gemset create project_name
    gem list # no gems :(

    rvm gemset use global
    gem install rake
    rvm gemset use project_name
    gem list # rake :)

  Install a gem directly into the global gemset:

    rvm 1.8.7@global gem install shoulda

  Install cheat in the global gemset when you install a new ruby:

    echo "cheat" >> ~/.rvm/gemsets/global.gems