From d4ee1d87a53145b5baea84d32bdb386e2106ec13 Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Fri, 19 Jun 2015 14:44:42 +0930
Subject: [PATCH] Generate a new revision string when files change

---
 src/Assets/RevisionCompiler.php | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/Assets/RevisionCompiler.php b/src/Assets/RevisionCompiler.php
index 171732630..ba76ad2ca 100644
--- a/src/Assets/RevisionCompiler.php
+++ b/src/Assets/RevisionCompiler.php
@@ -26,10 +26,7 @@ class RevisionCompiler implements CompilerInterface
 
     public function getFile()
     {
-        if (! ($revision = $this->getRevision())) {
-            $revision = Str::quickRandom();
-            $this->putRevision($revision);
-        }
+        $revision = $this->getRevision();
 
         $lastModTime = 0;
         foreach ($this->files as $file) {
@@ -39,8 +36,16 @@ class RevisionCompiler implements CompilerInterface
         $ext = pathinfo($this->filename, PATHINFO_EXTENSION);
         $file = $this->path.'/'.substr_replace($this->filename, '-'.$revision, -strlen($ext) - 1, 0);
 
-        if (! file_exists($file)
+        if (! ($exists = file_exists($file))
             || filemtime($file) < $lastModTime) {
+
+            if ($exists) {
+                unlink($file);
+            }
+
+            $revision = Str::quickRandom();
+            $this->putRevision($revision);
+            $file = $this->path.'/'.substr_replace($this->filename, '-'.$revision, -strlen($ext) - 1, 0);
             file_put_contents($file, $this->compile());
         }