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| -rw-r--r-- | zip.rb | 56 |
1 files changed, 56 insertions, 0 deletions
@@ -0,0 +1,56 @@ +# +# zip.rb +# + +module Puppet::Parser::Functions + newfunction(:zip, :type => :rvalue, :doc => <<-EOS + EOS + ) do |arguments| + + # Technically we support three arguments but only first is mandatory ... + raise(Puppet::ParseError, "zip(): Wrong number of arguments " + + "given (#{arguments.size} for 2)") if arguments.size < 2 + + a = arguments[0] + b = arguments[1] + + unless a.is_a?(Array) and b.is_a?(Array) + raise(Puppet::ParseError, 'zip(): Requires array to work with') + end + + flatten = arguments[2] if arguments[2] + + if flatten + klass = flatten.class + + # We can have either true or false, or string which resembles boolean ... + unless [FalseClass, TrueClass, String].include?(klass) + raise(Puppet::ParseError, 'zip(): Requires either ' + + 'boolean or string to work with') + end + + if flatten.is_a?(String) + # We consider all the yes, no, y, n and so on too ... + flatten = case flatten + # + # This is how undef looks like in Puppet ... + # We yield false 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, 'zip(): Unknown type of boolean given') + end + end + end + + result = a.zip(b) + result = flatten ? result.flatten : result + + return result + end +end + +# vim: set ts=2 sw=2 et : |