mw = mw or {}

function mw.clone( val )
	local tableRefs = {}
	local function recursiveClone( val )
		if type( val ) == 'table' then
			-- Encode circular references correctly
			if tableRefs[val] ~= nil then
				return tableRefs[val]
			end

			local retVal
			retVal = {}
			tableRefs[val] = retVal
			for key, elt in pairs( val ) do
				retVal[key] = recursiveClone( elt )
			end
			return retVal
		else
			return val
		end
	end
	return recursiveClone( val )
end

function mw.executeModule( chunk )
	local env = mw.clone( _G )
	setfenv( chunk, env )
	return chunk()
end

return mw