Exceptions: Log previous exception

src/Database/DatabaseServiceProvider.php

@@ -8,6 +8,7 @@ use Exception;
 use Illuminate\Database\Capsule\Manager as CapsuleManager;
 use Illuminate\Database\Connection as DatabaseConnection;
 use PDOException;
+use Throwable;
 
 class DatabaseServiceProvider extends ServiceProvider
 {
@@ -38,7 +39,7 @@ class DatabaseServiceProvider extends ServiceProvider
         try {
             $pdo = $capsule->getConnection()->getPdo();
         } catch (PDOException $e) {
-            $this->exitOnError();
+            $this->exitOnError($e);
         }
 
         $this->app->instance(CapsuleManager::class, $capsule);
@@ -56,10 +57,12 @@ class DatabaseServiceProvider extends ServiceProvider
     }
 
     /**
+     * @param Throwable $exception
+     *
      * @throws Exception
      */
-    protected function exitOnError()
+    protected function exitOnError(Throwable $exception)
     {
-        throw new Exception('Error: Unable to connect to database');
+        throw new Exception('Error: Unable to connect to database', 0, $exception);
     }
 }

src/Exceptions/Handlers/Legacy.php

@@ -25,12 +25,14 @@ class Legacy implements HandlerInterface
      */
     public function report(Throwable $e)
     {
+        $previous = $e->getPrevious();
         error_log(sprintf(
-            'Exception: Code: %s, Message: %s, File: %s:%u, Trace: %s',
+            'Exception: Code: %s, Message: %s, File: %s:%u, Previous: %s, Trace: %s',
             $e->getCode(),
             $e->getMessage(),
             $this->stripBasePath($e->getFile()),
             $e->getLine(),
+            $previous ? $previous->getMessage() : 'None',
             json_encode($e->getTrace())
         ));
 

tests/Unit/Exceptions/Handlers/LegacyTest.php

@@ -39,7 +39,7 @@ class LegacyTest extends TestCase
         $exception = new Exception('Lorem Ipsum', 4242);
         $line = __LINE__ - 1;
         $exception2 = new Exception('Test Exception');
-        $exception3 = new Exception('Mor Exceptions!');
+        $exception3 = new Exception('Moar Exceptions!', 42, new Exception('Another Exception'));
         $logger = new TestLogger();
         $logger2 = $this->createMock(TestLogger::class);
         $logger2->expects($this->once())
@@ -66,6 +66,9 @@ class LegacyTest extends TestCase
         $this->assertStringContainsString((string)$line, $logContent);
         $this->assertStringContainsString(__FUNCTION__, $logContent);
         $this->assertStringContainsString(json_encode(__CLASS__), $logContent);
+        $this->assertStringContainsString('Test Exception', $logContent);
+        $this->assertStringContainsString('Moar Exceptions!', $logContent);
+        $this->assertStringContainsString('Another Exception', $logContent);
 
         $this->assertTrue($logger->hasRecordThatPasses(function (array $record) use ($exception2) {
             $context = $record['context'];