Puppet Function: validate_slength

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

Overview

validate_slength()Any

Validate that the first argument is a string (or an array of strings), and less/equal to than the length of the second argument. An optional third parameter can be given the minimum length. It fails if the first argument is not a string or array of strings, and if arg 2 and arg 3 are not convertable to a number.

The following values will pass:

validate_slength("discombobulate",17)
validate_slength(["discombobulate","moo"],17)
validate_slength(["discombobulate","moo"],17,3)

The following valueis will not:

validate_slength("discombobulate",1)
validate_slength(["discombobulate","thermometer"],5)
validate_slength(["discombobulate","moo"],17,10)

Returns:

  • (Any)


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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/validate_slength.rb', line 3

newfunction(:validate_slength, :doc => <<-'ENDHEREDOC') do |args|

  function_deprecation([:validate_slength, 'This method is deprecated, please use the stdlib validate_legacy function, with String[]. There is further documentation for validate_legacy function in the README.'])
  Validate that the first argument is a string (or an array of strings), and
  less/equal to than the length of the second argument. An optional third
  parameter can be given the minimum length. It fails if the first
  argument is not a string or array of strings, and if arg 2 and arg 3 are
  not convertable to a number.

  The following values will pass:

    validate_slength("discombobulate",17)
    validate_slength(["discombobulate","moo"],17)
    validate_slength(["discombobulate","moo"],17,3)

  The following valueis will not:

    validate_slength("discombobulate",1)
    validate_slength(["discombobulate","thermometer"],5)
    validate_slength(["discombobulate","moo"],17,10)

  ENDHEREDOC

  raise Puppet::ParseError, "validate_slength(): Wrong number of arguments (#{args.length}; must be 2 or 3)" unless args.length == 2 or args.length == 3

  input, max_length, min_length = *args

  begin
    max_length = Integer(max_length)
    raise ArgumentError if max_length <= 0
  rescue ArgumentError, TypeError
    raise Puppet::ParseError, "validate_slength(): Expected second argument to be a positive Numeric, got #{max_length}:#{max_length.class}"
  end

  if min_length
    begin
      min_length = Integer(min_length)
      raise ArgumentError if min_length < 0
  rescue ArgumentError, TypeError
      raise Puppet::ParseError, "validate_slength(): Expected third argument to be unset or a positive Numeric, got #{min_length}:#{min_length.class}"
    end
  else
    min_length = 0
  end

  raise Puppet::ParseError, "validate_slength(): Expected second argument to be equal to or larger than third argument" unless max_length >= min_length

  validator = lambda do |str|
    unless str.length <= max_length and str.length >= min_length
      raise Puppet::ParseError, "validate_slength(): Expected length of #{input.inspect} to be between #{min_length} and #{max_length}, was #{input.length}"
    end
  end

  case input
  when String
    validator.call(input)
  when Array
    input.each_with_index do |arg, pos|
      if arg.is_a? String
        validator.call(arg)
      else
        raise Puppet::ParseError, "validate_slength(): Expected element at array position #{pos} to be a String, got #{arg.class}"
      end
    end
  else
    raise Puppet::ParseError, "validate_slength(): Expected first argument to be a String or Array, got #{input.class}"
  end
end