Module: Vagrant::Util::Remote::SafePuts

Defined in:
lib/vagrant/util/remote/safe_puts.rb

Instance Method Summary collapse

Instance Method Details

#safe_puts(message = nil, opts = nil) ⇒ Object

The SafePuts module is included in a few different places to provide a safe_puts method which does not error in the case that stdout is closed.

When we are in remote mode, stdout is in fact closed as all I/O is happening over an RPC interface. Instead of having safe_puts just swallow output every time it's called, we want it to send the message somewhere it will eventually be output.

To do this, we need to do some reflection to figure out what gets us to a UI::Remote.



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# File 'lib/vagrant/util/remote/safe_puts.rb', line 19

def safe_puts(message=nil, opts=nil)
  # When we're in a Command context, we can get a UI::Remote from the
  # Environment
  if instance_variable_defined?(:@env)
    @env.ui.output(message)
  else
    raise "Cannot safe_puts in remote mode from #{self.class}; Remote::SafePuts must be updated to handle this context"
  end
end