[Rpm-maint] [rpm-software-management/rpm] Allow database probing if _db_backend is not set (#1451)

[Michael Schroeder]

@mlschroe commented on this pull request.



> @@ -97,7 +98,7 @@ dbDetectBackend(rpmdb rdb)
 		rpmlog(RPMLOG_WARNING,
 			_("Converting database from %s to %s backend\n"),
 			ondisk->name, cfg->name);
-	    } else {
+	    } else if (*db_backend) {

With your code there will no longer be a warning for unknown but configured backends in read-only mode. We can also catch this in the invalid _db_backend test above if you want this to error out instead. But if we allow it I think we should print a warning.



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