rails--rails/railties/lib/rails/ruby_version_check.rb

if RUBY_VERSION < '1.9.3'
  desc = defined?(RUBY_DESCRIPTION) ? RUBY_DESCRIPTION : "ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE})"
  abort <<-end_message

    Rails 4 prefers to run on Ruby 2.0.

    You're running
      #{desc}

    Please upgrade to Ruby 1.9.3 or newer to continue.

  end_message
end
Update ruby_version_check. 2011-12-20 10:53:44 -05:00			`if RUBY_VERSION < '1.9.3'`
Support ruby 1.8.7 and 1.9.2 (and development versions) 2010-06-11 19:14:41 -04:00			`desc = defined?(RUBY_DESCRIPTION) ? RUBY_DESCRIPTION : "ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE})"`
Reject Ruby 1.8.3 when loading Rails; extract version checking code. git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3982 5ecf4fe2-1ee6-0310-87b1-e25e094e27de 2006-03-19 13:55:31 -05:00			`abort <<-end_message`

Prefer Ruby 2.0; require 1.9.3+ 2013-02-09 19:41:07 -05:00			`Rails 4 prefers to run on Ruby 2.0.`
Single ruby version requirement message 2010-06-11 14:02:47 -04:00
Support ruby 1.8.7 and 1.9.2 (and development versions) 2010-06-11 19:14:41 -04:00			`You're running`
			`#{desc}`

Prefer Ruby 2.0; require 1.9.3+ 2013-02-09 19:41:07 -05:00			`Please upgrade to Ruby 1.9.3 or newer to continue.`
Support ruby 1.8.7 and 1.9.2 (and development versions) 2010-06-11 19:14:41 -04:00
Reject Ruby 1.8.3 when loading Rails; extract version checking code. git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3982 5ecf4fe2-1ee6-0310-87b1-e25e094e27de 2006-03-19 13:55:31 -05:00			`end_message`
			`end`