Class: WickedPdf::Progress

Inherits:
Object
  • Object
show all
Defined in:
lib/wicked_pdf/progress.rb

Instance Method Summary collapse

Constructor Details

#initialize(callback = nil) ⇒ Progress

Returns a new instance of Progress.



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# File 'lib/wicked_pdf/progress.rb', line 6

def initialize(callback = nil)
  @callback = callback
end

Instance Method Details

#execute(command) ⇒ Object 



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# File 'lib/wicked_pdf/progress.rb', line 10

def execute(command)
  output = []
  begin
    PTY.spawn(command.join(' ')) do |stdout, _stdin, pid|
      stdout.sync
      stdout.each_line("\r") do |line|
        output << line.chomp
        @callback.call(line) if @callback
      end
    rescue Errno::EIO
      # child process is terminated, this is expected behaviour
    ensure
      ::Process.wait pid
    end
  rescue PTY::ChildExited
    puts 'The child process exited!'
  end
  err = output.join('\n')
  raise "#{command} failed (exitstatus 0). Output was: #{err}" unless $CHILD_STATUS && $CHILD_STATUS.exitstatus.zero?
end