[30903] | 1 | #
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| 2 | # str2bool.rb
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| 3 | #
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| 4 |
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| 5 | module Puppet::Parser::Functions
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| 6 | newfunction(:str2bool, :type => :rvalue, :doc => <<-EOS
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| 7 | This converts a string to a boolean. This attempt to convert strings that
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| 8 | contain things like: Y,y, 1, T,t, TRUE,true to 'true' and strings that contain things
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| 9 | like: 0, F,f, N,n, false, FALSE, no to 'false'.
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| 10 | EOS
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| 11 | ) do |arguments|
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| 12 |
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| 13 | raise(Puppet::ParseError, "str2bool(): Wrong number of arguments " +
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| 14 | "given (#{arguments.size} for 1)") if arguments.size < 1
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| 15 |
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| 16 | string = arguments[0]
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| 17 |
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| 18 | # If string is already Boolean, return it
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| 19 | if !!string == string
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| 20 | return string
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| 21 | end
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| 22 |
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| 23 | unless string.is_a?(String)
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| 24 | raise(Puppet::ParseError, 'str2bool(): Requires ' +
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| 25 | 'string to work with')
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| 26 | end
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| 27 |
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| 28 | # We consider all the yes, no, y, n and so on too ...
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| 29 | result = case string
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| 30 | #
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| 31 | # This is how undef looks like in Puppet ...
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| 32 | # We yield false in this case.
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| 33 | #
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| 34 | when /^$/, '' then false # Empty string will be false ...
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| 35 | when /^(1|t|y|true|yes)$/i then true
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| 36 | when /^(0|f|n|false|no)$/i then false
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| 37 | when /^(undef|undefined)$/ then false # This is not likely to happen ...
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| 38 | else
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| 39 | raise(Puppet::ParseError, 'str2bool(): Unknown type of boolean given')
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| 40 | end
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| 41 |
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| 42 | return result
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| 43 | end
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| 44 | end
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| 45 |
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| 46 | # vim: set ts=2 sw=2 et :
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