Class: Object

Inherits:
BasicObject
Defined in:
lib/suppress_output.rb

Overview

This code is taken from gist.github.com/moertel/11091573

Temporarily redirects STDOUT and STDERR to /dev/null but does print exceptions should there occur any. Call as:

suppress_output { puts 'never printed' }

Instance Method Summary collapse

Instance Method Details

#suppress_output ⇒ Object 



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# File 'lib/suppress_output.rb', line 10

def suppress_output
  begin
    original_stderr = $stderr.clone
    original_stdout = $stdout.clone
    $stderr.reopen(File.new('/dev/null', 'w'))
    $stdout.reopen(File.new('/dev/null', 'w'))
    retval = yield
  rescue Exception => e
    $stdout.reopen(original_stdout)
    $stderr.reopen(original_stderr)
    raise e
  ensure
    $stdout.reopen(original_stdout)
    $stderr.reopen(original_stderr)
  end
  retval
end