Fix #7 potential never-ending loop looking for autoload file.

See: #7

bin/capture-lookups

@@ -1,12 +1,57 @@
 #!/usr/bin/env php
 <?php
+
 set_time_limit(0);
 
-$vendor = __DIR__;
-while (!file_exists($vendor.'/vendor')) {
-    $vendor = dirname($vendor);
+//START - Autoloader inclusion
+
+//Determine if autoloader can be found.
+$possibleAutoloaderPaths = array(
+    __DIR__.'/../../../../vendor/autoload.php', //for when package bin is in vendor directory
+    __DIR__.'/../vendor/autoload.php', //for when standalone bin is in root
+);
+
+$autoloaderFound = FALSE;
+foreach ($possibleAutoloaderPaths as $autoloaderFile) {
+    if (file_exists($autoloaderFile)) {
+        $autoloaderFound = TRUE;
+        break;
+    }
+}
+
+//Either require autoloader.php or gracefully report error.
+if ($autoloaderFound){
+    require_once $autoloaderFile;
+} else {
+    //Tell the user in a friendly way:
+
+    //Compose the messages.
+    $feedbackLines = array(
+        'The autoload.php was not found.',
+        'The script searched for it at:',
+    );
+
+    foreach ($possibleAutoloaderPaths as $autoloaderFile) {
+        $feedbackLines[] = '[' . $autoloaderFile . ']';
+    }
+
+    //Extra spaces to highlight the suggestion.
+    $feedbackLines[] =
+        PHP_EOL
+        . 'Maybe you forgot to run \'composer install\'?'
+        . PHP_EOL;
+
+    //Write them out.
+    foreach($feedbackLines as $line){
+        fwrite(STDERR,  $line . PHP_EOL);
+    }
+
+
+    //Exit with non-zero (i.e error) code.
+    exit(1);
 }
-require $vendor.'/vendor/autoload.php';
+//END - Autoloader inclusion
+
 
 $command = new \XmlSquad\CaptureLookups\Command\CaptureLookupsCommand();
 $application = new \Symfony\Component\Console\Application();