How do you specify a minimum Ruby version in a gemspec?
RubyRuby Problem Overview
I'm writing a gemspec for a new version of a gem that will now require Ruby 1.9. Previous versions of the gem were ok with Ruby 1.8, but now 1.9 will be required. Is there a way to cause the gem install for this version of the gem to fail with a warning for users who try to install it on Ruby 1.8?
Ruby Solutions
Solution 1 - Ruby
From the RubyGems documentation:
# This gem will work with 1.8.6 or greater...
spec.required_ruby_version = '>= 1.8.6'
# Only with ruby 2.0.x
spec.required_ruby_version = '~> 2.0'
Solution 2 - Ruby
gem.required_ruby_version = '1.9.2'
Should solve your problem :-)