module Gem::VersionOption

# File lib/rubygems/version_option.rb, line 17
def add_platform_option(task = command, *wrap)
  OptionParser.accept Gem::Platform do |value|
    if value == Gem::Platform::RUBY then
      value
    else
      Gem::Platform.new value
    end
  end

  add_option('--platform PLATFORM', Gem::Platform,
             "Specify the platform of gem to #{task}", *wrap) do
               |value, options|
    unless options[:added_platform] then
      Gem.platforms = [Gem::Platform::RUBY]
      options[:added_platform] = true
    end

    Gem.platforms << value unless Gem.platforms.include? value
  end
end

# File lib/rubygems/version_option.rb, line 41
def add_prerelease_option(*wrap)
  add_option("--[no-]prerelease",
             "Allow prerelease versions of a gem", *wrap) do |value, options|
    options[:prerelease] = value
  end
end

# File lib/rubygems/version_option.rb, line 51
def add_version_option(task = command, *wrap)
  OptionParser.accept Gem::Requirement do |value|
    Gem::Requirement.new value
  end

  add_option('-v', '--version VERSION', Gem::Requirement,
             "Specify version of gem to #{task}", *wrap) do
               |value, options|
    options[:version] = value
    options[:prerelease] = true if value.prerelease?
  end
end