Small fixes, added console info to readme

.gitignore

@@ -1,7 +1,7 @@
 .idea/
-
 .php_cs.cache
-
 composer.lock
-vendor
+vendor/
+*~
+
 

README.md

@@ -12,7 +12,7 @@ composer require sikofitt/generate-mac
 ```php
 use Sikofitt\GenerateMac\Mac;
 
-$mac = new Mac(); // default is ':'
+$mac = new Mac(); // default separator is ':'
 // or
 $mac->setSeparator(Mac::SEPARATOR_COLON);
 $address = $mac->getAddress(); // ab:cd:ef:01:23:45
@@ -65,10 +65,29 @@ var_dump($addresses);
 // return an array [0 => '32:73:c0:b3:62:27']
 ```
 
+#### Using the console component
+
+The console script requires [symfony/console](https://symfony.com/doc/current/components/console.html "Symfony Console Component")
+```bash
+user@localhost:~/generate-mac$ bin/generate-mac --count (int) --output (json|plain|string) --separator (none|colon|dash)
+```
+  * --count Generate {count} mac addresses
+  * --output Output in selected format
+    * string: (default) Outputs the mac address(es) with formatting
+    * plain:  Outputs the mac address(es) with no formatting
+    * json:   Output the mac address(es) in json format
+  * --separator Outputs with the selected operator
+    * colon: ':' (default)
+    * dash:  '-'
+    * none:  ''
+
+_See bin/generate-mac --help_
+
+
 #### Test
 
 ```bash
-user@localhost:~/generate-mac$ vendor/phpunit
+user@localhost:~/generate-mac$ vendor/bin/phpunit
 ```
 
 #### License

bin/generate-mac

@@ -25,6 +25,8 @@ use Symfony\Component\Console\{
 
 use Sikofitt\GenerateMac\Command\GenerateMacCommand;
 
+define('GENERATE_MAC_VERSION', 'v0.0.1');
+
 $autoloadFiles = array(
   __DIR__ . '/../vendor/autoload.php',
   __DIR__ . '/../../../autoload.php',
@@ -39,22 +41,38 @@ foreach ($autoloadFiles as $autoloadFile) {
 }
 
 if (!defined('GENERATE_MAC')) {
-    die(
-      'You need to set up the project dependencies using the following commands:' . PHP_EOL .
-      'curl -s http://getcomposer.org/installer | php' . PHP_EOL .
-      'php composer.phar install' . PHP_EOL
-    );
+
+    $msg =
+      PHP_EOL . 'You need to use composer to install the dependencies:' . PHP_EOL .
+      'curl -LSs https://getcomposer.org/installer|php' . PHP_EOL .
+      'php composer.phar install, or ' . PHP_EOL .
+      'php composer.phar install --no-dev && php composer.phar require symfony/console' . PHP_EOL . PHP_EOL
+    ;
+
+    print $msg;
+
+    throw new \RuntimeException('Missing dependencies', -1);
 }
 
 if(false === class_exists(Command::class))
 {
-    throw new \RuntimeException('Install symfony/console to use the the generate-mac command.');
+    $msg =
+      PHP_EOL . 'You need to use composer to install the dependencies for the console:' . PHP_EOL .
+      'php composer.phar require symfony/console' . PHP_EOL . PHP_EOL
+    ;
+    print $msg;
+
+    throw new \RuntimeException('Missing package symfony/console.', -1);
 }
 
-$application = new Application();
-$application->add(new GenerateMacCommand());
-$application->setDefaultCommand('generate-mac', true);
-$application->setAutoExit(true);
+$application = new Application('Generate mac', GENERATE_MAC_VERSION);
+
+$application
+    ->add(new GenerateMacCommand());
+
+$application
+    ->setDefaultCommand('generate-mac', true)
+    ->setAutoExit(true);
 
 try {
     $application->run();

src/GenerateMac/Command/GenerateMacCommand.php

@@ -95,8 +95,7 @@ class GenerateMacCommand extends Command
                 $io->comment(implode(PHP_EOL, $macAddresses));
                 break;
             case 'json':
-                $result = $count > 1 ? $macAddresses : [$macAddresses];
-                $io->writeln(\json_encode($result, JSON_PRETTY_PRINT));
+                $io->writeln(\json_encode($macAddresses, JSON_PRETTY_PRINT));
                 break;
             case 'plain':
                 $io->writeln($macAddresses, SymfonyStyle::OUTPUT_PLAIN | SymfonyStyle::VERBOSITY_NORMAL);

src/GenerateMac/Mac.php

@@ -80,7 +80,7 @@ class Mac
     /**
      * Mac constructor.
      *
-     * @param int $separator  The mac address separator, one of ':', '-', or ''
+     * @param int $separator  The mac address separator, one of self::SEPARATOR_*
      * @param bool $unique  Whether or not we care if we get a non unique prefix.
      */
     public function __construct(int $separator = self::SEPARATOR_COLON, bool $unique = true)
@@ -98,8 +98,11 @@ class Mac
         $template = $this->shuffle();
         $prefix = $this->generateString($template);
 
+        /**
+         * @internal
+         */
         if ($this->isTest) {
-            $prefix = '02bb01';
+            $prefix = '02bb01'; // QEMU virtual NIC
         }
 
         if ($this->getUnique()) {
@@ -159,8 +162,18 @@ class Mac
      */
     public function setSeparator(int $separator): Mac
     {
-        if (!\in_array($separator, [self::SEPARATOR_COLON, self::SEPARATOR_DASH, self::SEPARATOR_NONE], true)) {
-            throw new \InvalidArgumentException('Separator is invalid.  Acceptable values: ":", "-", or ""');
+        if (!\in_array(
+            $separator,
+            [
+              self::SEPARATOR_COLON,
+              self::SEPARATOR_DASH,
+              self::SEPARATOR_NONE,
+            ],
+            true
+        )) {
+            throw new \InvalidArgumentException(
+                'Separator is invalid.  Acceptable values: One of Mac::SEPARATOR_*'
+            );
         }
 
         $this->separator = $separator;