use new metadata and download endpoints

CHANGELOG.md

@@ -4,11 +4,14 @@
 
 * `geoipupdate` now supports retrying on more types of errors
   such as HTTP2 INTERNAL_ERROR.
-* `HTTPReader` no longer retries on HTTP errors and therefore
-  `retryFor` was removed from `NewHTTPReader`.
 * Now `geoipupdate` doesn't requires the user to specify the config file
   even if all the other arguments are set via the environment variables.
   Reported by jsf84ksnf. GitHub #284.
+* `pkg/goipupdate/database` has been rewritten into `pkg/geoipupdate/download`.
+  This new package changes the update behaviour of the tool:
+    1. It will first request edition information from a newly introduced metadata endpoint.
+    2. Compare the result with existing editions and decide which edition needs to be updated.
+    3. Then download individual editions from a newly introduced download endpoint.
 
 ## 6.1.0 (2024-01-09)
 

cmd/geoipupdate/main.go

@@ -49,7 +49,11 @@ func main() {
 		log.Printf("Using database directory %s", config.DatabaseDirectory)
 	}
 
-	client := geoipupdate.NewClient(config)
+	client, err := geoipupdate.NewClient(config)
+	if err != nil {
+		log.Fatalf("Error initializing download client: %s", err)
+	}
+
 	if err = client.Run(context.Background()); err != nil {
 		log.Fatalf("Error retrieving updates: %s", err)
 	}