/usr/share/rubygems-integration/2.3.0/specifications/mysql-2.9.1.gemspec is in ruby-mysql 2.9.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | # -*- encoding: utf-8 -*-
# stub: mysql 2.9.1 ruby lib
# stub: ext/mysql_api/extconf.rb
Gem::Specification.new do |s|
  s.name = "mysql"
  s.version = "2.9.1"
  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
  s.require_paths = ["lib"]
  s.authors = ["TOMITA Masahiro"]
  s.date = "2016-04-06"
  s.description = "This is the MySQL API module for Ruby. It provides the same functions for Ruby\nprograms that the MySQL C API provides for C programs.\n\nThis package is offered as gem for easy installation using RubyGems. It wraps\nunmodified tmtm's mysql-ruby extension into a proper gem.\n\nPlease note that tmtm (Tomita Mashahiro) has deprecated development of this\nextension and only update it for bug fixes."
  s.email = ["tommy@tmtm.org"]
  s.extensions = ["ext/mysql_api/extconf.rb"]
  s.extra_rdoc_files = ["History.txt", "Manifest.txt", "README.txt"]
  s.files = [".gemtest", "COPYING", "COPYING.ja", "History.txt", "Manifest.txt", "README.txt", "Rakefile", "ext/mysql_api/extconf.rb", "ext/mysql_api/mysql.c", "extra/README.html", "extra/README_ja.html", "extra/tommy.css", "lib/mysql.rb", "lib/mysql/version.rb", "tasks/gem.rake", "tasks/native.rake", "tasks/vendor_mysql.rake", "test/test_mysql.rb"]
  s.homepage = "http://github.com/luislavena/mysql-gem"
  s.rdoc_options = ["--main", "README.txt"]
  s.required_ruby_version = Gem::Requirement.new(">= 1.8.7")
  s.rubyforge_project = "mysql-win"
  s.rubygems_version = "2.5.1"
  s.summary = "This is the MySQL API module for Ruby"
  s.test_files = ["test/test_mysql.rb"]
  if s.respond_to? :specification_version then
    s.specification_version = 3
    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
      s.add_development_dependency(%q<rdoc>, ["~> 3.10"])
      s.add_development_dependency(%q<rake-compiler>, ["~> 0.8.1"])
      s.add_development_dependency(%q<hoe>, ["~> 3.5"])
    else
      s.add_dependency(%q<rdoc>, ["~> 3.10"])
      s.add_dependency(%q<rake-compiler>, ["~> 0.8.1"])
      s.add_dependency(%q<hoe>, ["~> 3.5"])
    end
  else
    s.add_dependency(%q<rdoc>, ["~> 3.10"])
    s.add_dependency(%q<rake-compiler>, ["~> 0.8.1"])
    s.add_dependency(%q<hoe>, ["~> 3.5"])
  end
end
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