Puppet Function: any2bool

Defined in:
puppet/modules/stdlib/lib/puppet/parser/functions/any2bool.rb
Function type:
Ruby 3.x API

Overview

any2bool() ⇒ Any

This converts 'anything' to a boolean. In practise it does the following:

  • Strings such as Y,y,1,T,t,TRUE,yes,'true' will return true

  • Strings such as 0,F,f,N,n,FALSE,no,'false' will return false

  • Booleans will just return their original value

  • Number (or a string representation of a number) > 0 will return true, otherwise false

  • undef will return false

  • Anything else will return true

Returns:

  • (Any) 


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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/any2bool.rb', line 6

newfunction(:any2bool, :type => :rvalue, :doc => <<-EOS
This converts 'anything' to a boolean. In practise it does the following:

* Strings such as Y,y,1,T,t,TRUE,yes,'true' will return true
* Strings such as 0,F,f,N,n,FALSE,no,'false' will return false
* Booleans will just return their original value
* Number (or a string representation of a number) > 0 will return true, otherwise false
* undef will return false
* Anything else will return true
  EOS
) do |arguments|

  raise(Puppet::ParseError, "any2bool(): Wrong number of arguments " +
    "given (#{arguments.size} for 1)") if arguments.size < 1

  # If argument is already Boolean, return it
  if !!arguments[0] == arguments[0]
    return arguments[0]
  end

  arg = arguments[0]

  if arg == nil
    return false
  end

  if arg == :undef
    return false
  end

  valid_float = !!Float(arg) rescue false

  if arg.is_a?(Numeric)
    return function_num2bool( [ arguments[0] ] )
  end

  if arg.is_a?(String)
    if valid_float
      return function_num2bool( [ arguments[0] ] )
    else
      return function_str2bool( [ arguments[0] ] )
    end
  end

  return true

end