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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?
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Use `gem install -v` You may already be familiar with gem install , but if you add the -v flag, you can specify the version of the gem to install. Using -v you can specify an exact version or use version comparators.
So It all started in 2006 when RubyGems created Gemspec to define Ruby package specifications. Gemspec is basically the Readme for gems. It tells you about the author, version, summary, description, internal dependencies, execution and everything about the Gem.
If this is the case, you can look on /usr/lib/ruby/gems/1.8/gems/rubygems-update-x.x.x and take the directory with the highest value of x.x.x.
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' If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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