Misc fixes

* Updated build scripts to handle gitless environments a little
  better
* PDO shell plugin improvements
* More tests

plugins/com.noccy.pdo.shell/Shell/PdoShell.php

@@ -4,6 +4,7 @@ namespace SparkPlug\Com\Noccy\Pdo\Shell\Shell;
 
 use SparkPlug\Com\Noccy\Pdo\PdoResource;
 use Spark\Commands\Command;
+use Spark\SparkApplication;
 use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Helper\TableSeparator;
 use Symfony\Component\Console\Input\InputArgument;
@@ -178,6 +179,9 @@ class PdoShell {
             $query = $json['query']??'?';
             $res = $json['result']??[];
         } else {
+            if (!$this->lastQuery) {
+                return;
+            }
             $query = $this->lastQuery['query'];
             $res = $this->lastQuery['result'];
         }
@@ -223,6 +227,25 @@ class PdoShell {
     private function doSelectCommand(array $args)
     {
         $name = array_shift($args);
+
+        if (!$name) {
+            $app = SparkApplication::$instance;
+            $resources = $app->getResourceManager();
+            
+            $named = $resources->getAllNamedResources();
+            foreach ($named as $name=>$resource) {
+                if (!($resource instanceof PdoResource)) {
+                    continue;
+                }
+                $this->output->writeln(
+                    sprintf(" <comment>%s</><info>%s</>", ($name==$this->resource?"*":" "), $name)
+                );
+            }
+            return;
+    
+        }
+
+
         $res = get_resource($name);
         if ($res instanceof PdoResource) {
             $this->db = $res;