0UT1S's

# frozen_string_literal: true
require 'rubygems/command'
require 'rubygems/command_manager'
require 'rubygems/dependency_installer'
require 'rubygems/install_update_options'
require 'rubygems/local_remote_options'
require 'rubygems/spec_fetcher'
require 'rubygems/version_option'
require 'rubygems/install_message' # must come before rdoc for messaging
require 'rubygems/rdoc'

class Gem::Commands::UpdateCommand < Gem::Command

include Gem::InstallUpdateOptions
  include Gem::LocalRemoteOptions
  include Gem::VersionOption

attr_reader :installer # :nodoc:

attr_reader :updated # :nodoc:

def initialize
    super 'update', 'Update installed gems to the latest version',
      :document => %w[rdoc ri],
      :force    => false

add_install_update_options

OptionParser.accept Gem::Version do |value|
      Gem::Version.new value

value
    end

add_option('--system [VERSION]', Gem::Version,
               'Update the RubyGems system software') do |value, options|
      value = true unless value

options[:system] = value
    end

add_local_remote_options
    add_platform_option
    add_prerelease_option "as update targets"

@updated   = []
    @installer = nil
  end

def arguments # :nodoc:
    "GEMNAME       name of gem to update"
  end

def defaults_str # :nodoc:
    "--document --no-force --install-dir #{Gem.dir}"
  end

def description # :nodoc:
    <<-EOF
The update command will update your gems to the latest version.

The update command does not remove the previous version. Use the cleanup
command to remove old versions.
    EOF
  end

def usage # :nodoc:
    "#{program_name} GEMNAME [GEMNAME ...]"
  end

def check_latest_rubygems(version) # :nodoc:
    if Gem.rubygems_version == version
      say "Latest version already installed. Done."
      terminate_interaction
    end

options[:user_install] = false
  end

def check_update_arguments # :nodoc:
    unless options[:args].empty?
      alert_error "Gem names are not allowed with the --system option"
      terminate_interaction 1
    end
  end

def execute
    if options[:system]
      update_rubygems
      return
    end

hig = highest_installed_gems

gems_to_update = which_to_update hig, options[:args].uniq

if options[:explain]
      say "Gems to update:"

gems_to_update.each do |(name, version)|
        say "  #{name}-#{version}"
      end

return
    end

say "Updating installed gems"

updated = update_gems gems_to_update

updated_names = updated.map { |spec| spec.name }
    not_updated_names = options[:args].uniq - updated_names

if updated.empty?
      say "Nothing to update"
    else
      say "Gems updated: #{updated_names.join(' ')}"
      say "Gems already up-to-date: #{not_updated_names.join(' ')}" unless not_updated_names.empty?
    end
  end

def fetch_remote_gems(spec) # :nodoc:
    dependency = Gem::Dependency.new spec.name, "> #{spec.version}"
    dependency.prerelease = options[:prerelease]

fetcher = Gem::SpecFetcher.fetcher

spec_tuples, errors = fetcher.search_for_dependency dependency

error = errors.find { |e| e.respond_to? :exception }

raise error if error

spec_tuples
  end

def highest_installed_gems # :nodoc:
    hig = {} # highest installed gems

Gem::Specification.each do |spec|
      if hig[spec.name].nil? or hig[spec.name].version < spec.version
        hig[spec.name] = spec
      end
    end

hig
  end

def highest_remote_version(spec) # :nodoc:
    spec_tuples = fetch_remote_gems spec

matching_gems = spec_tuples.select do |g,_|
      g.name == spec.name and g.match_platform?
    end

highest_remote_gem = matching_gems.max_by { |g,_| g.version }

highest_remote_gem ||= [Gem::NameTuple.null]

highest_remote_gem.first.version
  end

def install_rubygems(version) # :nodoc:
    args = update_rubygems_arguments

update_dir = File.join Gem.dir, 'gems', "rubygems-update-#{version}"

Dir.chdir update_dir do
      say "Installing RubyGems #{version}"

installed = system Gem.ruby, '--disable-gems', 'setup.rb', *args
      say "RubyGems system software updated" if installed
    end
  end

def rubygems_target_version
    version = options[:system]
    update_latest = version == true

if update_latest
      version     = Gem::Version.new     Gem::VERSION
      requirement = Gem::Requirement.new ">= #{Gem::VERSION}"
    else
      version     = Gem::Version.new     version
      requirement = Gem::Requirement.new version
    end

rubygems_update         = Gem::Specification.new
    rubygems_update.name    = 'rubygems-update'
    rubygems_update.version = version

hig = {
      'rubygems-update' => rubygems_update
    }

gems_to_update = which_to_update hig, options[:args], :system
    _, up_ver   = gems_to_update.first

target = if update_latest
               up_ver
             else
               version
             end

return target, requirement
  end

def update_gem(name, version = Gem::Requirement.default)
    return if @updated.any? { |spec| spec.name == name }

update_options = options.dup
    update_options[:prerelease] = version.prerelease?

@installer = Gem::DependencyInstaller.new update_options

say "Updating #{name}"
    begin
      @installer.install name, Gem::Requirement.new(version)
    rescue Gem::InstallError, Gem::DependencyError => e
      alert_error "Error installing #{name}:\n\t#{e.message}"
    end

@installer.installed_gems.each do |spec|
      @updated << spec
    end
  end

def update_gems(gems_to_update)
    gems_to_update.uniq.sort.each do |(name, version)|
      update_gem name, version
    end

@updated
  end

##
  # Update RubyGems software to the latest version.

def update_rubygems
    check_update_arguments

version, requirement = rubygems_target_version

check_latest_rubygems version

update_gem 'rubygems-update', version

installed_gems = Gem::Specification.find_all_by_name 'rubygems-update', requirement
    version        = installed_gems.first.version

install_rubygems version
  end

def update_rubygems_arguments # :nodoc:
    args = []
    args << '--prefix' << Gem.prefix if Gem.prefix
    # TODO use --document for >= 1.9 , --no-rdoc --no-ri < 1.9
    args << '--no-rdoc' unless options[:document].include? 'rdoc'
    args << '--no-ri'   unless options[:document].include? 'ri'
    args << '--no-format-executable' if options[:no_format_executable]
    args << '--previous-version' << Gem::VERSION if
      options[:system] == true or
        Gem::Version.new(options[:system]) >= Gem::Version.new(2)
    args
  end

def which_to_update(highest_installed_gems, gem_names, system = false)
    result = []

highest_installed_gems.each do |l_name, l_spec|
      next if not gem_names.empty? and
              gem_names.none? { |name| name == l_spec.name }

highest_remote_ver = highest_remote_version l_spec

if system or (l_spec.version < highest_remote_ver)
        result << [l_spec.name, [l_spec.version, highest_remote_ver].max]
      end
    end

result
  end

end

By Order of Mr.0UT1S