# class Gem::Commands::CleanupCommand

### Public Class Methods

new ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 8
    def initialize
      super "cleanup",
            "Clean up old versions of installed gems",
            force: false, install_dir: Gem.dir,
            check_dev: true

      add_option("-n", "-d", "--dry-run",
                 "Do not uninstall gems") do |_value, options|
        options[:dryrun] = true
      end

      add_option(:Deprecated, "--dryrun",
                 "Do not uninstall gems") do |_value, options|
        options[:dryrun] = true
      end
      deprecate_option("--dryrun", extra_msg: "Use --dry-run instead")

      add_option("-D", "--[no-]check-development",
                 "Check development dependencies while uninstalling",
                 "(default: true)") do |value, options|
        options[:check_dev] = value
      end

      add_option("--[no-]user-install",
                 "Cleanup in user's home directory instead",
                 "of GEM_HOME.") do |value, options|
        options[:user_install] = value
      end

      @candidate_gems  = nil
      @default_gems    = []
      @full            = nil
      @gems_to_cleanup = nil
      @primary_gems    = nil
    end

Calls superclass method `Gem::Command::new`

### Public Instance Methods

clean_gems ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 95
    def clean_gems
      get_primary_gems
      get_candidate_gems
      get_gems_to_cleanup

      @full = Gem::DependencyList.from_specs

      deplist = Gem::DependencyList.new
      @gems_to_cleanup.each {|spec| deplist.add spec }

      deps = deplist.strongly_connected_components.flatten

      deps.reverse_each do |spec|
        uninstall_dep spec
      end
    end

execute ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 66
    def execute
      say "Cleaning up installed gems..."

      if options[:args].empty?
        done     = false
        last_set = nil

        until done do
          clean_gems

          this_set = @gems_to_cleanup.map(&:full_name).sort

          done = this_set.empty? || last_set == this_set

          last_set = this_set
        end
      else
        clean_gems
      end

      say "Clean up complete"

      verbose do
        skipped = @default_gems.map(&:full_name)

        "Skipped default gems: #{skipped.join ", "}"
      end
    end

get_candidate_gems ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 112
    def get_candidate_gems
      @candidate_gems = if options[:args].empty?
        Gem::Specification.to_a
      else
        options[:args].flat_map do |gem_name|
          Gem::Specification.find_all_by_name gem_name
        end
      end
    end

get_gems_to_cleanup ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 122
    def get_gems_to_cleanup
      gems_to_cleanup = @candidate_gems.select do |spec|
        @primary_gems[spec.name].version != spec.version
      end

      default_gems, gems_to_cleanup = gems_to_cleanup.partition(&:default_gem?)

      uninstall_from = options[:user_install] ? Gem.user_dir : Gem.dir

      gems_to_cleanup = gems_to_cleanup.select do |spec|
        spec.base_dir == uninstall_from
      end

      @default_gems += default_gems
      @default_gems.uniq!
      @gems_to_cleanup = gems_to_cleanup.uniq
    end

get_primary_gems ()
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 140
    def get_primary_gems
      @primary_gems = {}

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

uninstall_dep (spec)
Source

    # File lib/rubygems/commands/cleanup_command.rb, line 151
    def uninstall_dep(spec)
      return unless @full.ok_to_remove?(spec.full_name, options[:check_dev])

      if options[:dryrun]
        say "Dry Run Mode: Would uninstall #{spec.full_name}"
        return
      end

      say "Attempting to uninstall #{spec.full_name}"

      uninstall_options = {
        executables: false,
        version: "= #{spec.version}",
      }

      uninstall_options[:user_install] = Gem.user_dir == spec.base_dir

      uninstaller = Gem::Uninstaller.new spec.name, uninstall_options

      begin
        uninstaller.uninstall
      rescue Gem::DependencyRemovalException, Gem::InstallError,
             Gem::GemNotInHomeException, Gem::FilePermissionError => e
        say "Unable to uninstall #{spec.full_name}:"
        say "\t#{e.class}: #{e.message}"
      end
    end