Class: Blubber::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/blubber/runner.rb

Instance Method Summary collapse

Constructor Details

#initialize(logger:) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/blubber/runner.rb', line 5

def initialize(logger:)
  @logger = logger
end

Instance Method Details

#run(cmd) ⇒ Object 



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# File 'lib/blubber/runner.rb', line 9

def run(cmd)
  # see: http://stackoverflow.com/a/1162850/83386
  Open3.popen3(cmd) do |_stdin, stdout, stderr, thread|
    # read each stream from a new thread
    { out: stdout, err: stderr }.each do |key, stream|
      Thread.new do
        until (line = stream.gets).nil?
          # yield the block depending on the stream
          if key == :out
            logger.info line.strip
            yield line, nil, thread if block_given?
          else
            logger.error line.strip
            yield nil, line, thread if block_given?
          end
        end
      end
    end

    thread.join
    thread.value.exitstatus
  end
end