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#
# bool2num.rb
#
module Puppet::Parser::Functions
newfunction(:bool2num, :type => :rvalue, :doc => <<-EOS
Converts a boolean to a number. Converts the values:
false, f, 0, n, and no to 0
true, t, 1, y, and yes to 1
Requires a single boolean or string as an input.
EOS
) do |arguments|
raise(Puppet::ParseError, "bool2num(): Wrong number of arguments " +
"given (#{arguments.size} for 1)") if arguments.size < 1
value = arguments[0]
klass = value.class
# We can have either true or false, or string which resembles boolean ...
unless [FalseClass, TrueClass, String].include?(klass)
raise(Puppet::ParseError, 'bool2num(): Requires either ' +
'boolean or string to work with')
end
if value.is_a?(String)
# We consider all the yes, no, y, n and so on too ...
value = case value
#
# This is how undef looks like in Puppet ...
# We yield 0 (or false if you wish) in this case.
#
when /^$/, '' then false # Empty string will be false ...
when /^(1|t|y|true|yes)$/ then true
when /^(0|f|n|false|no)$/ then false
when /^(undef|undefined)$/ then false # This is not likely to happen ...
else
raise(Puppet::ParseError, 'bool2num(): Unknown type of boolean given')
end
end
# We have real boolean values as well ...
result = value ? 1 : 0
return result
end
end
# vim: set ts=2 sw=2 et :
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