Validate project path and confirm Docker is running

bin/spinner

@@ -13,5 +13,5 @@ $application->add(new SpinCommand());
 try {
     $application->run();
 } catch (\Exception $exception) {
-    die();
+    die($exception->getMessage());
 }

composer.json

@@ -17,5 +17,8 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^12.1"
-    }
+    },
+    "bin": [
+        "bin/spinner"
+    ]
 }

src/Command/AbstractSpinnerCommand.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Loom\Spinner\Command;
 
+use Loom\Spinner\Helper\System;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -12,6 +13,14 @@ use Symfony\Component\Console\Style\SymfonyStyle;
 class AbstractSpinnerCommand extends Command
 {
     protected SymfonyStyle $style;
+    protected System $system;
+
+    public function __construct()
+    {
+        $this->system = new System();
+
+        parent::__construct();
+    }
 
     protected function setStyle(InputInterface $input, OutputInterface $output): void
     {

src/Command/SpinCommand.php

@@ -4,18 +4,41 @@ declare(strict_types=1);
 
 namespace Loom\Spinner\Command;
 
+use Loom\Utility\FilePath\FilePath;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
 #[AsCommand(name: 'spin', description: 'Spin up a new development environment')]
 class SpinCommand extends AbstractSpinnerCommand
 {
+    protected function configure(): void
+    {
+        $this
+            ->addArgument('name', InputArgument::REQUIRED, 'The name for your Docker container.')
+            ->addArgument('path', InputArgument::REQUIRED, 'The absolute path to your projects root directory.');
+    }
+
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $this->setStyle($input, $output);
 
+        $projectDirectory = new FilePath($input->getArgument('path'));
+
+        if (!$projectDirectory->exists() || !$projectDirectory->isDirectory()) {
+            $this->style->error('The provided path is not a valid directory.');
+
+            return Command::FAILURE;
+        }
+
+        if (!$this->system->isDockerEngineRunning()) {
+            $this->style->error('It looks like the Docker Engine is not running. Please start it and try again.');
+
+            return Command::FAILURE;
+        }
+
         return Command::SUCCESS;
     }
 }

src/Helper/System.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Loom\Spinner\Helper;
+
+class System
+{
+    private string $operatingSystem;
+
+    public function __construct()
+    {
+        $this->operatingSystem = PHP_OS_FAMILY;
+    }
+
+    public function getName(): string
+    {
+        return $this->operatingSystem;
+    }
+
+    public function isWindows(): bool
+    {
+        return $this->operatingSystem === 'Windows';
+    }
+
+    public function isMacOS(): bool
+    {
+        return $this->operatingSystem === 'Darwin';
+    }
+
+    public function isLinux(): bool
+    {
+        return $this->operatingSystem === 'Linux';
+    }
+
+    public function isDockerEngineRunning(): bool
+    {
+        exec('docker info 2>&1', $output, $dockerInfoError);
+
+        return $dockerInfoError === 0;
+    }
+}