Recommend installing Ruby 2.3 on OSX

Move references to some specific ruby versions into a helper
method so it's easier to keep track of them

Author: tjgrathwell

lib/site_extensions/installfest.rb

@@ -0,0 +1,16 @@
+module StepExtensions
+  module Installfest
+    def version_string(name)
+      case name
+        when :minimum_ruby
+          '2.2.2'
+        when :osx_ruby_short
+          '2.3'
+        when :windows_ruby_short
+          '2.2'
+        else
+          raise StandardError, "No version string exists for '#{name}'"
+      end
+    end
+  end
+end

sites/en/installfest/_install_ruby.step

@@ -1,21 +1,21 @@
 console <<-BASH
-  rvm install 2.2.2
+  rvm install #{version_string(:osx_ruby_short)}
 BASH
 
 message "This downloads and compiles Ruby, which takes a while."
 console <<-BASH
-  rvm use 2.2.2
-  rvm --default use 2.2.2
+  rvm use #{version_string(:osx_ruby_short)}
+  rvm --default use #{version_string(:osx_ruby_short)}
 BASH
 
 verify do
   console "ruby -v"
-  fuzzy_result "ruby 2.2.2{FUZZY}p0 (2014-12-25 revision 49005) [x86_64-darwin13]{/FUZZY}"
+  fuzzy_result "ruby #{version_string(:osx_ruby_short)}{FUZZY}.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]{/FUZZY}"
 end
 
 div do
   h1 "Troubleshooting"
-  important "If `rvm install 2.2.2` says `autoreconf was not found in the PATH`" do
+  important "If `rvm install #{version_string(:osx_ruby_short)}` says `autoreconf was not found in the PATH`" do
     div do
       option_half "Mac OS" do
         console "brew install automake"
@@ -26,7 +26,7 @@ div do
       end
     end
 
-    message "Once that completes, retry `rvm install 2.2.2`"
+    message "Once that completes, retry `rvm install #{version_string(:osx_ruby_short)}`"
   end
 end
 

sites/en/installfest/get_a_sticker.step

@@ -14,9 +14,9 @@ step "Have a volunteer check your tool versions" do
     h3 "On all operating systems:"
 
     console "ruby -v"
-    fuzzy_result "ruby 2.2.{FUZZY}4p230 (2015-12-16 revision 53155) [x86_64-darwin13]{/FUZZY}"
+    fuzzy_result "ruby 2.2{FUZZY}.4p230 (2015-12-16 revision 53155) [x86_64-darwin13]{/FUZZY}"
 
-    tip "Depending on your environment, your Ruby version might be **2.2** or **2.3**. As long as it's 2.2.2 or above, you're good to go."
+    tip "Depending on your environment, your Ruby version might be **2.2** or **2.3**. As long as it's #{version_string(:minimum_ruby)} or above, you're good to go."
 
     console "bundle -v"
     fuzzy_result "Bundler version 1{FUZZY}.x.x{/FUZZY}"

sites/en/installfest/windows.step

@@ -6,7 +6,7 @@ MARKDOWN
 
 step "Run RailsInstaller" do
   message "RailsInstaller includes Rails, Ruby, Git and SQLite."
-  message "Go to <http://railsinstaller.org/>, scroll to the 'Downloads' section, and download the RailsInstaller for Windows/Ruby 2.2."
+  message "Go to <http://railsinstaller.org/>, scroll to the 'Downloads' section, and download the RailsInstaller for Windows/Ruby #{version_string(:windows_ruby_short)}."
   message "Click on the downloaded file to run the install wizard.  Click Next at each step to accept the defaults."
   message "Be sure to check the boxes for *Install git (recommended)* and  *Add executables for Ruby, DevKit Git (if checked above) to the PATH*"
 
@@ -108,7 +108,7 @@ end
 step "Sanity Check" do
 
   console "ruby -v"
-  fuzzy_result "ruby 2.2{FUZZY}.4{/FUZZY}"
+  fuzzy_result "ruby #{version_string(:windows_ruby_short)}{FUZZY}.4{/FUZZY}"
 
   console "rails -v"
   fuzzy_result "Rails 5.0{FUZZY}.x{/FUZZY}"