Puppet Function: format_interface

Defined in:
lib/puppet/parser/functions/format_interface.rb
Function type:
Ruby 3.x API

Overview

format_interface() ⇒ Any

Returns:

  • (Any) 


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# File 'lib/puppet/parser/functions/format_interface.rb', line 2

newfunction(:format_interface, :type => :rvalue,:doc => <<-EOS
EOS
) do |args|

  # setup some objects to hold our regexes
  out_rx = /^out(going)?$/i
  in_rx = /^in(coming)?$/i
  int_rx = /^[a-z0-9\.\-_]+\+?$/i

  return '' if args == nil or args[0] == :undef

  interface = ''
  interface = String(args[0]).dup

  # make sure we were at least passed a string or nil
  raise Puppet::ParseError, "non-string interface passed - #{interface}" \
    unless interface.kind_of?(String)

  # handle cases where we weren't passed an interface
  return interface if interface == ''

  direction = 'in'
  direction = args[1] unless args[1] == nil

  raise Puppet::ParseError, "invalid direction specified - #{direction}" \
    unless direction =~ /(#{out_rx}|#{in_rx})/i

  # lets assume all interfaces will only have alphanumerics, plus
  # '.' and '_'
  raise Puppet::ParseError, "bad interface name passed - #{interface}" \
    unless interface =~ int_rx

  return "-o #{interface}" if direction =~ out_rx
  return "-i #{interface}"
end