From 35864db96132a820ce1c4a67dbac5e656a5b8489 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Sat, 10 May 2014 11:52:13 -0700
Subject: [PATCH] feature detect for FNM_EXTGLOB for older Ruby. Fixes #15053

---
 .../lib/action_view/template/resolver.rb      | 26 +++++++++++++++----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/actionview/lib/action_view/template/resolver.rb b/actionview/lib/action_view/template/resolver.rb
index dbfabef15d..189086132e 100644
--- a/actionview/lib/action_view/template/resolver.rb
+++ b/actionview/lib/action_view/template/resolver.rb
@@ -181,11 +181,7 @@ module ActionView
     def query(path, details, formats)
       query = build_query(path, details)
 
-      template_paths = Dir[query].reject { |filename|
-        File.directory?(filename) ||
-          # deals with case-insensitive file systems.
-          !File.fnmatch(query, filename, File::FNM_EXTGLOB)
-      }
+      template_paths = find_template_paths query
 
       template_paths.map { |template|
         handler, format, variant = extract_handler_and_format_and_variant(template, formats)
@@ -200,6 +196,26 @@ module ActionView
       }
     end
 
+    if File.const_defined? :FNM_EXTGLOB
+      def find_template_paths(query)
+        Dir[query].reject { |filename|
+          File.directory?(filename) ||
+            # deals with case-insensitive file systems.
+            !File.fnmatch(query, filename, File::FNM_EXTGLOB)
+        }
+      end
+    else
+      def find_template_paths(query)
+        # deals with case-insensitive file systems.
+        sanitizer = Hash.new { |h,dir| h[dir] = Dir["#{dir}/*"] }
+
+        Dir[query].reject { |filename|
+          File.directory?(filename) ||
+            !sanitizer[File.dirname(filename)].include?(filename)
+        }
+      end
+    end
+
     # Helper for building query glob string based on resolver's pattern.
     def build_query(path, details)
       query = @pattern.dup