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=, #check_deprecated_options, common_options, #deprecate_option, #deprecated?, extra_args, extra_args=, #get_all_gem_names, #get_all_gem_names_and_versions, #get_one_gem_name, #get_one_optional_argument, #handle_options, #handles?, #invoke, #invoke_with_build_args, #merge_options, #remove_option, #show_help, #show_lookup_failure, specific_extra_args, specific_extra_args_hash, 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, #verbose

Methods included from DefaultUserInteraction

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

Methods included from Text

#clean_text, #format_text, #levenshtein_distance, #min3, #truncate_text

Constructor Details

#initializeCleanupCommand

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',
        :force => false, :install_dir => Gem.dir,
        :check_dev => true

  add_option('-n', '-d', '--dryrun',
             'Do not uninstall gems') do |value, options|
    options[:dryrun] = true
  end

  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
  @original_home   = nil
  @original_path   = nil
  @primary_gems    = nil
end

Instance Method Details

#argumentsObject

:nodoc:


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# File 'lib/rubygems/commands/cleanup_command.rb', line 39

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

#clean_gemsObject


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# File 'lib/rubygems/commands/cleanup_command.rb', line 90

def clean_gems
  @original_home = Gem.dir
  @original_path = Gem.path

  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

  Gem::Specification.reset
end

#defaults_strObject

:nodoc:


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# File 'lib/rubygems/commands/cleanup_command.rb', line 43

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

#descriptionObject

:nodoc:


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# File 'lib/rubygems/commands/cleanup_command.rb', line 47

def description # :nodoc:
  <<-EOF
The cleanup command removes old versions of gems from GEM_HOME that are not
required to meet a dependency.  If a gem is installed elsewhere in GEM_PATH
the cleanup command won't delete it.

If no gems are named all gems in GEM_HOME are cleaned.
  EOF
end

#executeObject


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# File 'lib/rubygems/commands/cleanup_command.rb', line 61

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 {|spec| spec.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 {|spec| spec.full_name }

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

#get_candidate_gemsObject


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# File 'lib/rubygems/commands/cleanup_command.rb', line 112

def get_candidate_gems
  @candidate_gems = unless options[:args].empty?
                      options[:args].map do |gem_name|
                        Gem::Specification.find_all_by_name gem_name
                      end.flatten
                    else
                      Gem::Specification.to_a
                    end
end

#get_gems_to_cleanupObject


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# 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 do |spec|
    spec.default_gem?
  end

  uninstall_from = options[:user_install] ? Gem.user_dir : @original_home

  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_gemsObject


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# File 'lib/rubygems/commands/cleanup_command.rb', line 142

def get_primary_gems
  @primary_gems = {}

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

#uninstall_dep(spec) ⇒ Object


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# File 'lib/rubygems/commands/cleanup_command.rb', line 153

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
ensure
  # Restore path Gem::Uninstaller may have changed
  Gem.use_paths @original_home, *@original_path
end

#usageObject

:nodoc:


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# File 'lib/rubygems/commands/cleanup_command.rb', line 57

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