Support SQS ChainProvider by default.

Unless the credpath query param is provided, the SQS credidentails
will be automatically chosen from one of the following:

- ~/.aws/credidentials
- Environment variables
- EC2 Role

internal/endpoint/endpoint.go

@@ -95,6 +95,7 @@ type Endpoint struct {
 		CredPath    string
 		CredProfile string
 		QueueName   string
+		CreateQueue bool
 	}
 	NATS struct {
 		Host  string
@@ -502,10 +503,15 @@ func parseEndpoint(s string) (Endpoint, error) {
 					endpoint.SQS.CredPath = val[0]
 				case "credprofile":
 					endpoint.SQS.CredProfile = val[0]
+				case "createqueue":
+					switch strings.ToLower(val[0]) {
+					case "0", "false":
+					default:
+						endpoint.SQS.CreateQueue = true
+					}
 				}
 			}
 		}
-
 		// Throw error if we not provide any queue name
 		if endpoint.SQS.QueueName == "" {
 			return endpoint, errors.New("missing SQS queue name")

internal/endpoint/sqs.go

@@ -65,30 +65,22 @@ func (conn *SQSConn) Send(msg string) error {
 	conn.t = time.Now()
 
 	if conn.svc == nil && conn.session == nil {
+		var creds *credentials.Credentials
 		credPath := conn.ep.SQS.CredPath
+		if credPath != "" {
 			credProfile := conn.ep.SQS.CredProfile
-		var sess *session.Session
+			if credProfile == "" {
-		if credPath != "" && credProfile != "" {
+				credProfile = "default"
-			sess = session.Must(session.NewSession(&aws.Config{
-				Region:      aws.String(conn.ep.SQS.Region),
-				Credentials: credentials.NewSharedCredentials(credPath, credProfile),
-				MaxRetries:  aws.Int(5),
-			}))
-		} else if credPath != "" {
-			sess = session.Must(session.NewSession(&aws.Config{
-				Region:      aws.String(conn.ep.SQS.Region),
-				Credentials: credentials.NewSharedCredentials(credPath, "default"),
-				MaxRetries:  aws.Int(5),
-			}))
-		} else {
-			sess = session.Must(session.NewSession(&aws.Config{
-				Region:     aws.String(conn.ep.SQS.Region),
-				MaxRetries: aws.Int(5),
-			}))
 			}
-		// Create a SQS service client.
+			creds = credentials.NewSharedCredentials(credPath, credProfile)
+		}
+		sess := session.Must(session.NewSession(&aws.Config{
+			Region:      aws.String(conn.ep.SQS.Region),
+			Credentials: creds,
+			MaxRetries:  aws.Int(5),
+		}))
 		svc := sqs.New(sess)
-
+		if conn.ep.SQS.CreateQueue {
 			svc.CreateQueue(&sqs.CreateQueueInput{
 				QueueName: aws.String(conn.ep.SQS.QueueName),
 				Attributes: map[string]*string{
@@ -96,6 +88,7 @@ func (conn *SQSConn) Send(msg string) error {
 					"MessageRetentionPeriod": aws.String("86400"),
 				},
 			})
+		}
 		conn.session = sess
 		conn.svc = svc
 	}