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Created April 2, 2012 23:13
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Puppet module for outputting json in a sorted consistent way
#
# sorted_json.rb
# Puppet module for outputting json in a sorted consistent way. I use it for creating config files with puppet
require 'json'
def sorted_json(json)
if (json.kind_of? String)
return json.to_json
elsif (json.kind_of? Array)
arrayRet = []
json.each do |a|
arrayRet.push(sorted_json(a))
end
return "[" << arrayRet.join(',') << "]";
elsif (json.kind_of? Hash)
ret = []
json.keys.sort.each do |k|
ret.push(k.to_json << ":" << sorted_json(json[k]))
end
return "{" << ret.join(",") << "}";
end
raise Exception("Unable to handle object of type " + json.class)
end
module Puppet::Parser::Functions
newfunction(:sorted_json, :type => :rvalue, :doc => <<-EOS
This function takes data, outputs making sure the hash keys are sorted
*Examples:*
sorted_json({'key'=>'value'})
Would return: {'key':'value'}
EOS
) do |arguments|
raise(Puppet::ParseError, "sorted_json(): Wrong number of arguments " +
"given (#{arguments.size} for 1)") if arguments.size != 1
json = arguments[0]
return sorted_json(json)
end
end
# vim: set ts=2 sw=2 et :
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