Module: FileType::Extractable

Defined in:
lib/file_type.rb

Class Method Summary collapse

Class Method Details

.included(aClass) ⇒ Object 



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# File 'lib/file_type.rb', line 119

def self.included ( aClass )

  aClass.class_inheritable_accessor :extract_command

  aClass.module_eval do

    def extractable?
      true
    end

    def mk_cmd ( out )
      extract_command < @path > out
    end

    def extract
      base, ext = @base.extsplit
      @tmp = TempPath.new(base.path.basename, ext)
      cmd = mk_cmd(@tmp)
      data = cmd.run(self.class.runner)
      data.waitpid if data.status.nil?
      if data.status != 0
        @tmp.rmtree if @tmp.exist?
        STDERR.puts data.error.read if data.error and data.error.exist?
        raise ExtractError, "Cannot extract a file:
        |  path: #{to_s}
        |  type: #{self.class}
        |  command: #{cmd}
        |  exit status: #{data.status.exitstatus}".head_cut!
      end
      FileType.guess(@tmp)
    end

    alias :default :extract

  end

end