Class: Gem::Commands::CleanupCommand

Inherits:
Gem::Command show all
Defined in:
lib/rubygems/commands/cleanup_command.rb

Instance Attribute Summary

Attributes inherited from Gem::Command

#command, #defaults, #options, #program_name, #summary

Instance Method Summary collapse

Methods inherited from Gem::Command

add_common_option, #add_extra_args, #add_option, add_specific_extra_args, #begins?, build_args, build_args=, common_options, extra_args, extra_args=, #get_all_gem_names, #get_one_gem_name, #get_one_optional_argument, #handle_options, #handles?, #invoke, #merge_options, #remove_option, #show_help, #show_lookup_failure, specific_extra_args, specific_extra_args_hash, #when_invoked

Methods included from UserInteraction

#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction

Methods included from DefaultUserInteraction

ui, #ui, ui=, #ui=, use_ui, #use_ui

Constructor Details

#initialize ⇒ CleanupCommand

Returns a new instance of CleanupCommand.



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# File 'lib/rubygems/commands/cleanup_command.rb', line 7

def initialize
  super 'cleanup',
        'Clean up old versions of installed gems in the local repository',
        :force => false, :install_dir => Gem.dir

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

Instance Method Details

#arguments ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/cleanup_command.rb', line 17

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

#defaults_str ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/cleanup_command.rb', line 21

def defaults_str # :nodoc:
  "--no-dryrun"
end

#description ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/cleanup_command.rb', line 25

def description # :nodoc:
  <<-EOF
The cleanup command removes old gems from GEM_HOME.  If an older version is
installed elsewhere in GEM_PATH the cleanup command won't touch it.
  EOF
end

#execute ⇒ Object 



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# File 'lib/rubygems/commands/cleanup_command.rb', line 36

def execute
  say "Cleaning up installed gems..."
  primary_gems = {}

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

  gems_to_cleanup = unless options[:args].empty? then
                      options[:args].map do |gem_name|
                        Gem::Specification.find_all_by_name gem_name
                      end.flatten
                    else
                      Gem::Specification.to_a
                    end

  gems_to_cleanup = gems_to_cleanup.select { |spec|
    primary_gems[spec.name].version != spec.version
  }

  deplist = Gem::DependencyList.new
  gems_to_cleanup.uniq.each do |spec| deplist.add spec end

  deps = deplist.strongly_connected_components.flatten.reverse

  original_path = Gem.path

  deps.each do |spec|
    if options[:dryrun] then
      say "Dry Run Mode: Would uninstall #{spec.full_name}"
    else
      say "Attempting to uninstall #{spec.full_name}"

      options[:args] = [spec.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

    # Restore path Gem::Uninstaller may have change
    Gem.use_paths(*original_path)
  end

  say "Clean Up Complete"
end

#usage ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/cleanup_command.rb', line 32

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