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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

Constant Summary

::Gem::Command - Inherited

HELP

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

#command

The name of the command.

#defaults

The default options for the command.

#deprecated?,
#options

The options for the command.

#program_name

The name of the command for command-line invocation.

#summary

A short description of 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.

#check_deprecated_options,
#defaults_str

Override to display the default values of the command options.

#deprecate_option

Mark a command-line option as deprecated, and optionally specify a deprecation horizon.

#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.

#option_is_deprecated?,
#parser

Create on demand parser.

#wrap

Wraps text to width

#add_parser_description, #add_parser_options, #add_parser_summary

::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

::Gem::Text - Included

#clean_text

Remove any non-printable characters and make the text suitable for printing.

#format_text

Wraps text to wrap characters and optionally indents by indent characters.

#levenshtein_distance

This code is based directly on the ::Gem::Text gem implementation Returns a value representing the “cost” of transforming str1 into str2.

#truncate_text, #min3

Constructor Details

.newCleanupCommand

[ GitHub ]

  
# 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', '--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
  @original_home   = nil
  @original_path   = nil
  @primary_gems    = nil
end

Instance Method Details

#arguments

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 45

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

#clean_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 96

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_str

This method is for internal use only.
[ GitHub ]

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

def defaults_str # :nodoc:
  "--no-dry-run"
end

#description

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 53

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

#execute

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 67

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_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 118

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_cleanup

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 128

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_gems

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 148

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)

[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 159

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

#usage

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rubygems/commands/cleanup_command.rb', line 63

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