1 module Puppet::Parser::Functions
3 newfunction(:validate_integer, :doc => <<-'ENDHEREDOC') do |args|
4 Validate that the first argument is an integer (or an array of integers). Abort catalog compilation if any of the checks fail.
6 The second argument is optional and passes a maximum. (All elements of) the first argument has to be less or equal to this max.
8 The third argument is optional and passes a minimum. (All elements of) the first argument has to be greater or equal to this min.
9 If, and only if, a minimum is given, the second argument may be an empty string or undef, which will be handled to just check
10 if (all elements of) the first argument are greater or equal to the given minimum.
12 It will fail if the first argument is not an integer or array of integers, and if arg 2 and arg 3 are not convertable to an integer.
14 The following values will pass:
17 validate_integer(1, 2)
18 validate_integer(1, 1)
19 validate_integer(1, 2, 0)
20 validate_integer(2, 2, 2)
21 validate_integer(2, '', 0)
22 validate_integer(2, undef, 0)
24 validate_integer(2, $foo, 0)
25 validate_integer([1,2,3,4,5], 6)
26 validate_integer([1,2,3,4,5], 6, 0)
28 Plus all of the above, but any combination of values passed as strings ('1' or "1").
29 Plus all of the above, but with (correct) combinations of negative integer values.
31 The following values will not:
33 validate_integer(true)
34 validate_integer(false)
36 validate_integer({ 1 => 2 })
38 validate_integer($foo)
39 validate_integer($foobaridontexist)
41 validate_integer(1, 0)
42 validate_integer(1, true)
43 validate_integer(1, '')
44 validate_integer(1, undef)
45 validate_integer(1, , 0)
46 validate_integer(1, 2, 3)
47 validate_integer(1, 3, 2)
48 validate_integer(1, 3, true)
50 Plus all of the above, but any combination of values passed as strings ('false' or "false").
51 Plus all of the above, but with incorrect combinations of negative integer values.
52 Plus all of the above, but with non-integer crap in arrays or maximum / minimum argument.
56 # tell the user we need at least one, and optionally up to two other parameters
57 raise Puppet::ParseError, "validate_integer(): Wrong number of arguments; must be 1, 2 or 3, got #{args.length}" unless args.length > 0 and args.length < 4
59 input, max, min = *args
61 # check maximum parameter
64 # allow max to be empty (or undefined) if we have a minimum set
65 if args.length > 2 and max == ''
70 rescue TypeError, ArgumentError
71 raise Puppet::ParseError, "validate_integer(): Expected second argument to be unset or an Integer, got #{max}:#{max.class}"
78 # check minimum parameter
81 min = Integer(min.to_s)
82 rescue TypeError, ArgumentError
83 raise Puppet::ParseError, "validate_integer(): Expected third argument to be unset or an Integer, got #{min}:#{min.class}"
89 # ensure that min < max
90 if min and max and min > max
91 raise Puppet::ParseError, "validate_integer(): Expected second argument to be larger than third argument, got #{max} < #{min}"
94 # create lamba validator function
95 validator = lambda do |num|
98 raise Puppet::ParseError, "validate_integer(): Expected #{input.inspect} to be smaller or equal to #{max}, got #{input.inspect}."
100 # check input > min (this will only be checked if no exception has been raised before)
102 raise Puppet::ParseError, "validate_integer(): Expected #{input.inspect} to be greater or equal to #{min}, got #{input.inspect}."
106 # if this is an array, handle it.
109 # check every element of the array
110 input.each_with_index do |arg, pos|
112 arg = Integer(arg.to_s)
114 rescue TypeError, ArgumentError
115 raise Puppet::ParseError, "validate_integer(): Expected element at array position #{pos} to be an Integer, got #{arg.class}"
118 # for the sake of compatibility with ruby 1.8, we need extra handling of hashes
120 raise Puppet::ParseError, "validate_integer(): Expected first argument to be an Integer or Array, got #{input.class}"
121 # check the input. this will also fail any stuff other than pure, shiny integers
124 input = Integer(input.to_s)
125 validator.call(input)
126 rescue TypeError, ArgumentError
127 raise Puppet::ParseError, "validate_integer(): Expected first argument to be an Integer or Array, got #{input.class}"