Class: PVC::LinesPiece::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/pvc/lines_piece.rb

Instance Method Summary collapse

Constructor Details

#initialize(block, opts) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/pvc/lines_piece.rb', line 6

def initialize(block, opts)
  @block = block
  @mode = opts[:mode]
  @read, @write = IO.pipe
  @read.close_on_exec = true
  @write.close_on_exec = true
end

Instance Method Details

#finish ⇒ Object 



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# File 'lib/pvc/lines_piece.rb', line 32

def finish
  @write.close
  @thread.join
  @read.close
end

#start(following_piece) ⇒ Object 



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# File 'lib/pvc/lines_piece.rb', line 18

def start(following_piece)
  @return = nil
  @thread = Thread.new do
    @read.each_line do |line|
      new_line = @block.call(line)
      following_piece.stdin.write case @mode
        when :map then new_line
        when :tap then line
        else raise "wrong mode"
      end
    end
  end
end

#stdin ⇒ Object 



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# File 'lib/pvc/lines_piece.rb', line 14

def stdin
  @write
end