List possible values for database driver (#426)

* List possible values for database driver

Nobody has to guess anymore what the possible values are for the
--database option.

* Update NewCommand.php

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: dmarcoux

src/NewCommand.php

@@ -26,6 +26,8 @@ class NewCommand extends Command
     use Concerns\ConfiguresPrompts;
     use Concerns\InteractsWithHerdOrValet;
 
+    const DATABASE_DRIVERS = ['mysql', 'mariadb', 'pgsql', 'sqlite', 'sqlsrv'];
+
     /**
      * The Composer instance.
      *
@@ -49,7 +51,7 @@ protected function configure()
             ->addOption('branch', null, InputOption::VALUE_REQUIRED, 'The branch that should be created for a new repository', $this->defaultBranch())
             ->addOption('github', null, InputOption::VALUE_OPTIONAL, 'Create a new repository on GitHub', false)
             ->addOption('organization', null, InputOption::VALUE_REQUIRED, 'The GitHub organization to create the new repository for')
-            ->addOption('database', null, InputOption::VALUE_REQUIRED, 'The database driver your application will use')
+            ->addOption('database', null, InputOption::VALUE_REQUIRED, 'The database driver your application will use. Possible values are: '.implode(', ', self::DATABASE_DRIVERS))
             ->addOption('react', null, InputOption::VALUE_NONE, 'Install the React Starter Kit')
             ->addOption('vue', null, InputOption::VALUE_NONE, 'Install the Vue Starter Kit')
             ->addOption('livewire', null, InputOption::VALUE_NONE, 'Install the Livewire Starter Kit')
@@ -561,8 +563,8 @@ protected function databaseOptions(): array
      */
     protected function validateDatabaseOption(InputInterface $input)
     {
-        if ($input->getOption('database') && ! in_array($input->getOption('database'), $drivers = ['mysql', 'mariadb', 'pgsql', 'sqlite', 'sqlsrv'])) {
-            throw new \InvalidArgumentException("Invalid database driver [{$input->getOption('database')}]. Valid options are: ".implode(', ', $drivers).'.');
+        if ($input->getOption('database') && ! in_array($input->getOption('database'), self::DATABASE_DRIVERS)) {
+            throw new \InvalidArgumentException("Invalid database driver [{$input->getOption('database')}]. Possible values are: ".implode(', ', self::DATABASE_DRIVERS).'.');
         }
     }