rakefile.rb

require 'yui-utils'
    
task :yui_modules do
    output = YUIUtils.build_module_list()
    
    #YUIUtils.output(modules)
end

yui-utils.rb

class YUIUtils
    @@module_regex = /YUI\.add\((['"][\w\-]+['"]).*\}, ['"].+['"], \{\s*(.+)\s*\}\);?/mi
    
    def self.build_module_list(opts = {})
        out = []
        
        opts["filter"] = (opts["filter"].kind_of? String) ? opts["filter"] : "**/*.js"
        opts["jsdir"] = (opts["jsdir"].kind_of? String) ? opts["filter"] : "Public/js/"
        
        FileList[opts["filter"]].each do |file|
            match = File.read(file).scan(@@module_regex)
            if match[0] && match[0][0] && match[0][1] #filter out files that didn't match
                #prettier names
                yuimodule = match[0][0]
                config = match[0][1]
                
                out.push(%(\t#{yuimodule} : {\n\t\t"path" : "#{file.gsub(opts["jsdir"], "")}",\n\t\t#{config}\n\t}))
            end
        end
        
        "{\n" + out.join(",\n") + "\n}"
    end
    
    def self.output(modules, filename, replace = false)
        File.open(filename, "w") do |file|
            contents = (replace) ? file.gsub(replace, modules) : modules
            
            file.puts(contents)
        end
    end
end