[9.x] Adds error output to db command when missing host (#44394)

* Check for host

* Formatting

Author: joedixon

src/Illuminate/Database/Console/DbCommand.php

@@ -34,6 +34,14 @@ public function handle()
     {
         $connection = $this->getConnection();
 
+        if (! isset($connection['host'])) {
+            $this->components->error('No host specified for this database connection.');
+            $this->line('  Use the <options=bold>[--read]</> and <options=bold>[--write]</> options to specify a read or write connection.');
+            $this->newLine();
+
+            return Command::FAILURE;
+        }
+
         (new Process(
             array_merge([$this->getCommand($connection)], $this->commandArguments($connection)),
             null,