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✏️ Editing: doctor.rb

require 'rubygems'
require 'rubygems/user_interaction'

##
# Cleans up after a partially-failed uninstall or for an invalid
# Gem::Specification.
#
# If a specification was removed by hand this will remove any remaining files.
#
# If a corrupt specification was installed this will clean up warnings by
# removing the bogus specification.

class Gem::Doctor

include Gem::UserInteraction

##
  # Maps a gem subdirectory to the files that are expected to exist in the
  # subdirectory.

REPOSITORY_EXTENSION_MAP = [ # :nodoc:
    ['specifications', '.gemspec'],
    ['build_info',     '.info'],
    ['cache',          '.gem'],
    ['doc',            ''],
    ['extensions',     ''],
    ['gems',           ''],
  ]

missing =
    Gem::REPOSITORY_SUBDIRECTORIES.sort -
      REPOSITORY_EXTENSION_MAP.map { |(k,_)| k }.sort

raise "Update REPOSITORY_EXTENSION_MAP, missing: #{missing.join ', '}" unless
    missing.empty?

##
  # Creates a new Gem::Doctor that will clean up +gem_repository+.  Only one
  # gem repository may be cleaned at a time.
  #
  # If +dry_run+ is true no files or directories will be removed.

def initialize gem_repository, dry_run = false
    @gem_repository = gem_repository
    @dry_run        = dry_run

@installed_specs = nil
  end

##
  # Specs installed in this gem repository

def installed_specs # :nodoc:
    @installed_specs ||= Gem::Specification.map { |s| s.full_name }
  end

##
  # Are we doctoring a gem repository?

def gem_repository?
    not installed_specs.empty?
  end

##
  # Cleans up uninstalled files and invalid gem specifications

def doctor
    @orig_home = Gem.dir
    @orig_path = Gem.path

say "Checking #{@gem_repository}"

Gem.use_paths @gem_repository.to_s

unless gem_repository? then
      say 'This directory does not appear to be a RubyGems repository, ' +
          'skipping'
      say
      return
    end

doctor_children

say
  ensure
    Gem.use_paths @orig_home, *@orig_path
  end

##
  # Cleans up children of this gem repository

def doctor_children # :nodoc:
    REPOSITORY_EXTENSION_MAP.each do |sub_directory, extension|
      doctor_child sub_directory, extension
    end
  end

##
  # Removes files in +sub_directory+ with +extension+

def doctor_child sub_directory, extension # :nodoc:
    directory = File.join(@gem_repository, sub_directory)

Dir.entries(directory).sort.each do |ent|
      next if ent == "." || ent == ".."

child = File.join(directory, ent)
      next unless File.exist?(child)

basename = File.basename(child, extension)
      next if installed_specs.include? basename
      next if /^rubygems-\d/ =~ basename
      next if 'specifications' == sub_directory and 'default' == basename

type = File.directory?(child) ? 'directory' : 'file'

action = if @dry_run then
                 'Extra'
               else
                 FileUtils.rm_r(child)
                 'Removed'
               end

say "#{action} #{type} #{sub_directory}/#{File.basename(child)}"
    end
  rescue Errno::ENOENT
    # ignore
  end

end

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