Snippet of Gruntfile.coffee code to wrap a number of json files and attach them to the namespace. Requires grunt-contrib-concat. More flexible than using some of the grunt json packages

grunt-contrib-concat-json

concat:
  json:
    src: ['source/files/here.json']
    dest: 'output/files/here.js'
    options:
      banner: "(function(namespace){\n'use strict'\nnamespace.json={};\n"
      footer: "\n})(YOURNAMESPACEHERE)"
      process: (src,filepath) ->
        arr = filepath.split '/'
        filename = arr[arr.length-1]
        # Process the filename here to extract bits you need. E.g.:
        name = filename.replace('.json','')
        return "namespace.json['#{name}']=#{src};\n"