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PATH: opt / alt / ruby20 / lib64 / ruby / 2.0.0 / rubygems / commands

require 'rubygems/command'

class Gem::Commands::WhichCommand < Gem::Command
  def initialize
    super 'which', 'Find the location of a library file you can require',
          :search_gems_first => false, :show_all => false

add_option '-a', '--[no-]all', 'show all matching files' do |show_all, options|
      options[:show_all] = show_all
    end

add_option '-g', '--[no-]gems-first',
               'search gems before non-gems' do |gems_first, options|
      options[:search_gems_first] = gems_first
    end
  end

def arguments # :nodoc:
    "FILE          name of file to find"
  end

def defaults_str # :nodoc:
    "--no-gems-first --no-all"
  end

def execute
    found = false

options[:args].each do |arg|
      arg = arg.sub(/#{Regexp.union(*Gem.suffixes)}$/, '')
      dirs = $LOAD_PATH

spec = Gem::Specification.find_by_path arg

if spec then
        if options[:search_gems_first] then
          dirs = gem_paths(spec) + $LOAD_PATH
        else
          dirs = $LOAD_PATH + gem_paths(spec)
        end
      end

# TODO: this is totally redundant and stupid
      paths = find_paths arg, dirs

if paths.empty? then
        alert_error "Can't find ruby library file or shared library #{arg}"
      else
        say paths
        found = true
      end
    end

terminate_interaction 1 unless found
  end

def find_paths(package_name, dirs)
    result = []

dirs.each do |dir|
      Gem.suffixes.each do |ext|
        full_path = File.join dir, "#{package_name}#{ext}"
        if File.exist? full_path and not File.directory? full_path then
          result << full_path
          return result unless options[:show_all]
        end
      end
    end

result
  end

def gem_paths(spec)
    spec.require_paths.collect { |d| File.join spec.full_gem_path, d }
  end

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

end

[-] generate_index_command.rb [edit]
[-] dependency_command.rb [edit]
[-] search_command.rb [edit]
[-] environment_command.rb [edit]
[-] sources_command.rb [edit]
[-] owner_command.rb [edit]
[-] server_command.rb [edit]
[-] contents_command.rb [edit]
[-] push_command.rb [edit]
[-] cleanup_command.rb [edit]
[-] list_command.rb [edit]
[-] setup_command.rb [edit]
[-] query_command.rb [edit]
[-] build_command.rb [edit]
[-] uninstall_command.rb [edit]
[-] stale_command.rb [edit]
[-] fetch_command.rb [edit]
[+] ..
[-] unpack_command.rb [edit]
[-] yank_command.rb [edit]
[-] rdoc_command.rb [edit]
[-] install_command.rb [edit]
[-] update_command.rb [edit]
[-] mirror_command.rb [edit]
[-] pristine_command.rb [edit]
[-] cert_command.rb [edit]
[-] lock_command.rb [edit]
[-] help_command.rb [edit]
[-] check_command.rb [edit]
[-] outdated_command.rb [edit]
[-] which_command.rb [edit]
[-] specification_command.rb [edit]