Module: Rabbit::SystemRunner

Included in:

ImageManipulable::Dia, ImageManipulable::EPS, ImageManipulable::GIMP, ImageManipulable::Mermaid

Defined in:

lib/rabbit/utils.rb

Class Method Summary

• .run(cmd, *args, progress: nil) ⇒ Object

Class Method Details

.run(cmd, *args, progress: nil) ⇒ Object

# File 'lib/rabbit/utils.rb', line 355

def run(cmd, *args, progress: nil)
  begin
    IO.pipe do |input, output|
      pid = spawn(cmd, *args, out: output)
      output.close
      begin
        loop do
          readables, = IO.select([input], nil, nil, 0.1)
          if readables
            readable = readables[0]
            begin
              $stdout.print(readable.read_nonblock(4096))
            rescue EOFError
              break
            else
              break if readable.eof?
            end
          else
            progress.call if progress
          end
        end
        true
      ensure
        Process.waitpid(pid)
      end
    end
  rescue SystemCallError
    yield($!) if block_given?
    false
  end
end