The rubygems binary gem allows to extract a local gem with gem unpack GEMNAME. For more details see the official documentation Show archive.org snapshot .

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

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This was useful for compliance checks, when it was necessary to check the license of the C-files in nokogiri.