From 9d27c9680b8dcde78a0b726546a6006a95634db3 Mon Sep 17 00:00:00 2001
From: RJ Garcia <ragboyjr@icloud.com>
Date: Mon, 1 Jun 2020 18:06:24 -0400
Subject: [PATCH] Files without match are left untouched

Signed-off-by: RJ Garcia <ragboyjr@icloud.com>
---
 src/GenerateStruct.php         |  4 ++++
 src/struct-gen.php             |  2 +-
 test/Feature/StructGenTest.php | 15 +++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/GenerateStruct.php b/src/GenerateStruct.php
index c4f38ef..b7aa011 100644
--- a/src/GenerateStruct.php
+++ b/src/GenerateStruct.php
@@ -37,6 +37,10 @@ public function __invoke(string $code): string {
         $nodeFinder = new NodeFinder;
         $factory = new BuilderFactory();
         $classesToGenerateStructs = $this->findClassesToGenerateStructs($nodeFinder, $ast);
+        if (!$classesToGenerateStructs) {
+            return $code;
+        }
+
         $alreadyExistingGeneratedTraits = $this->findAlreadyExistingGeneratedTraits($nodeFinder, $ast, $classesToGenerateStructs);
         $code = $this->removeExistingTraitsFromOriginalCode($code, $alreadyExistingGeneratedTraits);
 
diff --git a/src/struct-gen.php b/src/struct-gen.php
index 301b2c5..405beca 100644
--- a/src/struct-gen.php
+++ b/src/struct-gen.php
@@ -38,7 +38,7 @@ function generateStructsForFiles(iterable $files, LoggerInterface $logger = null
             $logger->debug('No changes detected.');
         } else {
             $logger->info("New Struct Info: \n". $updated);
+            file_put_contents($file->getPathname(), $updated);
         }
-        file_put_contents($file->getPathname(), $updated);
     }
 }
diff --git a/test/Feature/StructGenTest.php b/test/Feature/StructGenTest.php
index ba84945..6774f71 100644
--- a/test/Feature/StructGenTest.php
+++ b/test/Feature/StructGenTest.php
@@ -49,4 +49,19 @@ public function can_generate_structs_for_files() {
             trim(file_get_contents(self::GENERATED_FILE_PATH))
         );
     }
+
+    /** @test */
+    public function files_without_any_matching_classes_are_left_untouched() {
+        $genStruct = new GenerateStruct();
+        $input = <<<'PHP'
+<?php
+
+interface Acme {}
+class Foo {}
+function bar() {
+
+}
+PHP;
+        $this->assertEquals($input, $genStruct($input));
+    }
 }