function init()

in index.js [98:150]
43 lines of code
11 McCabe index (conditional complexity)

function init(callback) {
    if (!online) {
        if (!setRegion || setRegion === null || setRegion === "") {
            setRegion = "us-east-1";
            console.log("Warning: Setting default region " + setRegion);
        }

        if (debug) {
            console.log("AWS Streams to Firehose Forwarder v" + pjson.version + " in " + setRegion);
        }

        transform.setupTransformer(function (err, transformer) {
            if (err) {
                callback(err);
            } else {
                useTransformer = transformer;

                aws.config.update({
                    region: setRegion
                });

                // configure a new connection to firehose, if one has not been
                // provided
                if (!exports.firehose) {
                    if (debug) {
                        console.log("Connecting to Amazon Kinesis Firehose in " + setRegion);
                    }
                    exports.firehose = new aws.Firehose({
                        apiVersion: '2015-08-04',
                        region: setRegion
                    });
                }

                // configure a new connection to kinesis streams, if one has not
                // been provided
                if (!exports.kinesis) {
                    if (debug) {
                        console.log("Connecting to Amazon Kinesis Streams in " + setRegion);
                    }
                    exports.kinesis = new aws.Kinesis({
                        apiVersion: '2013-12-02',
                        region: setRegion
                    });
                }

                online = true;
                callback(null);
            }
        });
    } else {
        callback(null);
    }
}