Add option to sort classmap list

bin/classmap_generator.php

@@ -55,6 +55,7 @@
     'append|a'    => 'Append to autoload file if it exists',
     'overwrite|w' => 'Whether or not to overwrite existing autoload file',
     'ignore|i-s'  => 'Comma-separated namespaces to ignore',
+    'sort|s'      => 'Alphabetically sort classes',
 );
 
 try {
@@ -174,8 +175,13 @@
     }
 }
 
+$classmap_array = (array) $map;
+if ($opts->getOption('s')) {
+    ksort($classmap_array);
+}
+
 if ($appending) {
-    $content = var_export((array) $map, true) . ';';
+    $content = var_export($classmap_array, true) . ';';
 
     // Prefix with __DIR__; modify the generated content
     $content = preg_replace("#(=> ')#", "=> __DIR__ . '/", $content);
@@ -198,7 +204,7 @@
     // Stupid syntax highlighters make separating < from PHP declaration necessary
     $content = '<' . "?php\n"
              . "// Generated by ZF2's ./bin/classmap_generator.php\n"
-             . 'return ' . var_export((array) $map, true) . ';';
+             . 'return ' . var_export($classmap_array, true) . ';';
 
     // Prefix with __DIR__; modify the generated content
     $content = preg_replace("#(=> ')#", "=> __DIR__ . '/", $content);