From cffe6a7b6877ede4a9026a6fa69bb8bc2eba8d35 Mon Sep 17 00:00:00 2001
From: Nao Minami <south37777@gmail.com>
Date: Wed, 5 Jul 2017 12:11:40 +0900
Subject: [PATCH] Check all library for mime type lookup

---
 lib/asset_sync/multi_mime.rb | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/lib/asset_sync/multi_mime.rb b/lib/asset_sync/multi_mime.rb
index eb73d392..c8085c7f 100644
--- a/lib/asset_sync/multi_mime.rb
+++ b/lib/asset_sync/multi_mime.rb
@@ -5,17 +5,28 @@ class MultiMime
 
     def self.lookup(ext)
 
+      mime = nil
+      library_found = false
       if defined?(::MIME::Types)
-        ::MIME::Types.type_for(ext).first
-      elsif defined?(::Mime::Type)
-        ::Mime::Type.lookup_by_extension(ext)
-      elsif defined?(::Rack::Mime)
+        mime = ::MIME::Types.type_for(ext).first
+        library_found = true
+      end
+      if !mime && defined?(::Mime::Type)
+        mime = ::Mime::Type.lookup_by_extension(ext)
+        library_found = true
+      end
+      if !mime && defined?(::Rack::Mime)
         ext_with_dot = ".#{ext}"
-        ::Rack::Mime.mime_type(ext_with_dot)
-      else
+        mime = ::Rack::Mime.mime_type(ext_with_dot)
+        library_found = true
+      end
+
+      if !library_found
         raise "No library found for mime type lookup"
       end
 
+      mime
+
     end
 
   end