gather_map_config.js

var gatherMapConfig = function (mapPath) {
        var buffer = fse.readFileSync(mapPath),
            map = JSON.parse(buffer),
            properties = ['dataLength', 'width', 'height', 'tilewidth', 'tileheight'],
            prefix = 'Octos.config.map.',
            result = [];

        // iterate over each desired property
        for (var i = 0; i < properties.length; i++) {
            var value;
            // if we need to calculate the maximum length of data, do so
            if (properties[i] === 'dataLength') {
                var data = [];
                for (var j = 0; j < map.layers.length; j++) {
                    // if there is no data object, give up
                    if (typeof map.layers[j].data === 'undefined') { continue; }
                    // if the current data is bigger than the stored data...
                    if (map.layers[j].data.length > data.length) {
                        // store that sweet, sweet big data.
                        data = map.layers[j].data;
                    }
                }
                value = data.length;
            } else {
                value = map[properties[i]];
            }
            // shove the properly formatted into the result
            result.push(prefix + properties[i] + ' = ' + value + ';');
        }

        return result.join('\n');
    };