Exit with a non-zero error code if communicating with elasticsearch fails

main.go

@@ -23,7 +23,6 @@ func main() {
 	if err != nil {
 		log.Fatalln("Failed to connect to elasticsearch:", err)
 	}
-	defer esClient.Close()
 	projectID := os.Args[1]
 	projectPath := os.Args[2]
@@ -40,4 +39,10 @@ func main() {
 	log.Printf("Project ID: %s, Rails env: %s", projectID, railsEnv)
 	repo.Index(esClient)
+
+	// Flushes any queued requests. Errors mean we've not indexed everything, so
+	// need to return an error code
+	if err := esClient.Close(); err != nil {
+		log.Fatalln("Elasticsearch error: ", err)
+	}
 }