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Dir : //proc/self/root/opt/alt/ruby21/lib64/ruby/2.1.0/rubygems/commands/yank_command.rb

require 'rubygems/command'
require 'rubygems/local_remote_options'
require 'rubygems/version_option'
require 'rubygems/gemcutter_utilities'

class Gem::Commands::YankCommand < Gem::Command
  include Gem::LocalRemoteOptions
  include Gem::VersionOption
  include Gem::GemcutterUtilities

  def description # :nodoc:
    <<-EOF
The yank command removes a gem you pushed to a server from the server's
index.

Note that if you push a gem to rubygems.org the yank command does not
prevent other people from downloading the gem via the download link.

Once you have pushed a gem several downloads will happen automatically
via the webhooks.  If you accidentally pushed passwords or other sensitive
data you will need to change them immediately and yank your gem.

If you are yanking a gem due to intellectual property reasons contact
http://help.rubygems.org for permanant removal.  Be sure to mention this
as the reason for the removal request.
    EOF
  end

  def arguments # :nodoc:
    "GEM       name of gem"
  end

  def usage # :nodoc:
    "#{program_name} GEM -v VERSION [-p PLATFORM] [--undo] [--key KEY_NAME]"
  end

  def initialize
    super 'yank', 'Remove a pushed gem from the index'

    add_version_option("remove")
    add_platform_option("remove")

    add_option('--undo') do |value, options|
      options[:undo] = true
    end

    add_option('-k', '--key KEY_NAME',
               'Use API key from your gem credentials file') do |value, options|
      options[:key] = value
    end
  end

  def execute
    sign_in

    version   = get_version_from_requirements(options[:version])
    platform  = get_platform_from_requirements(options)
    api_key   = Gem.configuration.rubygems_api_key
    api_key   = Gem.configuration.api_keys[options[:key].to_sym] if options[:key]

    if version then
      if options[:undo] then
        unyank_gem(version, platform, api_key)
      else
        yank_gem(version, platform, api_key)
      end
    else
      say "A version argument is required: #{usage}"
      terminate_interaction
    end
  end

  def yank_gem(version, platform, api_key)
    say "Yanking gem from #{self.host}..."
    yank_api_request(:delete, version, platform, "api/v1/gems/yank", api_key)
  end

  def unyank_gem(version, platform, api_key)
    say "Unyanking gem from #{host}..."
    yank_api_request(:put, version, platform, "api/v1/gems/unyank", api_key)
  end

  private

  def yank_api_request(method, version, platform, api, api_key)
    name = get_one_gem_name
    response = rubygems_api_request(method, api) do |request|
      request.add_field("Authorization", api_key)

      data = {
        'gem_name' => name,
        'version' => version,
      }
      data['platform'] = platform if platform

      request.set_form_data data
    end
    say response.body
  end

  def get_version_from_requirements(requirements)
    requirements.requirements.first[1].version
  rescue
    nil
  end

  def get_platform_from_requirements(requirements)
    Gem.platforms[1].to_s if requirements.key? :added_platform
  end

end