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Class: Gem::Commands::CleanupCommand

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
Instance Chain:
Inherits: Gem::Command
Defined in: lib/rubygems/commands/cleanup_command.rb

Class Attribute Summary

::Gem::Command - Inherited

.build_args

Arguments used when building gems.

.build_args=, .extra_args, .extra_args=

Class Method Summary

::Gem::Command - Inherited

.add_common_option,
.add_specific_extra_args

Add a list of extra arguments for the given command.

.common_options,
.new

Initializes a generic gem command named command.

.specific_extra_args

Return an array of extra arguments for the command.

.specific_extra_args_hash

Accessor for the specific extra args hash (self initializing).

Instance Attribute Summary

::Gem::Command - Inherited

#defaults

The default options for the command.

#program_name

The name of the command for command-line invocation.

#summary

A short description of the command.

#command

The name of the command.

#options

The options for the command.

::Gem::DefaultUserInteraction - Included

Instance Method Summary

::Gem::Command - Inherited

#add_extra_args

Adds extra args from ~/.gemrc.

#add_option

Add a command-line option and handler to the command.

#arguments

Override to provide details of the arguments a command takes.

#begins?

True if long begins with the characters from short.

#defaults_str

Override to display the default values of the command options.

#description

Override to display a longer description of what this command does.

#execute

Override to provide command handling.

#get_all_gem_names

Get all gem names from the command line.

#get_all_gem_names_and_versions

Get all [gem, version] from the command line.

#get_one_gem_name

Get a single gem name from the command line.

#get_one_optional_argument

Get a single optional argument from the command line.

#handle_options

Handle the given list of arguments by parsing them and recording the results.

#handles?

True if the command handles the given argument list.

#invoke

Invoke the command with the given list of arguments.

#invoke_with_build_args

Invoke the command with the given list of normal arguments and additional build arguments.

#merge_options

Merge a set of command options with the set of default options (without modifying the default option hash).

#remove_option

Remove previously defined command-line argument name.

#show_help

Display the help message for the command.

#show_lookup_failure

Display to the user that a gem couldn't be found and reasons why.

#usage

Override to display the usage for an individual gem command.

#when_invoked

Call the given block when invoked.

#add_parser_run_info

Adds a section with title and content to the parser help view.

#configure_options,
#create_option_parser

Creates an option parser and fills it in with the help info for the command.

#parser

Create on demand parser.

#wrap

Wraps text to width

::Gem::UserInteraction - Included

#alert

Displays an alert statement.

#alert_error

Displays an error statement to the error output location.

#alert_warning

Displays a warning statement to the warning output location.

#ask

Asks a question and returns the answer.

#ask_for_password

Asks for a password with a prompt

#ask_yes_no

Asks a yes or no question.

#choose_from_list

Asks the user to answer question with an answer from the given list.

#say

Displays the given statement on the standard output (or equivalent).

#terminate_interaction

Terminates the RubyGems process with the given exit_code

#verbose

Calls say with msg or the results of the block if really_verbose is true.

::Gem::DefaultUserInteraction - Included

Constructor Details

.newCleanupCommand

[ GitHub ]

  
# 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

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

#clean_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 78

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 do |spec| deplist.add spec end

  deps = deplist.strongly_connected_components.flatten

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

  deps.reverse_each do |spec|
    uninstall_dep spec
  end

  Gem::Specification.reset
end

#execute

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 49

def execute
  say "Cleaning up installed gems..."

  if options[:args].empty? then
    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_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 100

def get_candidate_gems
  @candidate_gems = 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
end

#get_gems_to_cleanup

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 110

def get_gems_to_cleanup
  gems_to_cleanup = @candidate_gems.select { |spec|
    @primary_gems[spec.name].version != spec.version
  }

  default_gems, gems_to_cleanup = gems_to_cleanup.partition { |spec|
    spec.default_gem?
  }

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

#get_primary_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 124

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 then
      @primary_gems[spec.name] = spec
    end
  end
end

#uninstall_dep(spec)

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 135

def uninstall_dep spec
  return unless @full.ok_to_remove?(spec.full_name)

  if options[:dryrun] then
    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