Class: Gem::Commands::PathCommand

Inherits:
Gem::Command
  • Object
show all
Defined in:
lib/rubygems/commands/path_command.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PathCommand

Returns a new instance of PathCommand.



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# File 'lib/rubygems/commands/path_command.rb', line 7

def initialize
  super('path', description)
end

Instance Method Details

#description ⇒ Object 



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# File 'lib/rubygems/commands/path_command.rb', line 3

def description
  'Find the path for a given gem or require path'
end

#execute ⇒ Object 



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# File 'lib/rubygems/commands/path_command.rb', line 11

def execute
  name, version = extract!(options[:args])

  # find the exact gem
  if gem_path = find_gem_path(name)
    say(gem_path)

  # find the require file
  elsif path = Gem.find_files("#{name}.rb").first
    # favor gem first (e.g. rake gem)
    if gem_path = Gem.path.find{ |p|
         break $1 if path =~ %r{(#{p}(/[^/]+){2})}
       }
      say(gem_path)
    else
      say(path)
    end
  else
    alert_error("#{name} not found")
    terminate_interaction(1)
  end
end

#find_gem_path(name) ⇒ Object 



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# File 'lib/rubygems/commands/path_command.rb', line 34

def find_gem_path name
  gem_path = Gem.path.find do |base|
    gem_path = $LOAD_PATH.find do |path|
      platforms = [
        'ruby',
        sitearch,
        *univeral_darwin
      ].map(&Regexp.method(:escape)).join('|')

      gem_path = path[
        %r{\A#{base}/
           (?:bundler/)?
           gems/
           #{name}\-[^/-]+(?:\-(?:#{platforms}))?/
        }x
      ]
      break gem_path if gem_path
    end
    break gem_path if gem_path
  end
  gem_path.chop if gem_path
end