Simplify SubversionDownloadStrategy.

1 files changed, 4 insertions, 2 deletions

diff --git a/Library/Homebrew/cask/lib/hbc/container/criteria.rb b/Library/Homebrew/cask/lib/hbc/container/criteria.rb
index 66ecb8c87..52f171d6a 100644
--- a/Library/Homebrew/cask/lib/hbc/container/criteria.rb
+++ b/Library/Homebrew/cask/lib/hbc/container/criteria.rb
@@ -13,9 +13,11 @@ module Hbc
       end
 
       def magic_number(regex)
+        return false if path.directory?
+
         # 262: length of the longest regex (currently: Hbc::Container::Tar)
-        @magic_number ||= File.open(@path, "rb") { |f| f.read(262) }
-        @magic_number =~ regex
+        @magic_number ||= File.open(path, "rb") { |f| f.read(262) }
+        @magic_number.match?(regex)
       end
     end
   end