Scan files array only once

In normal case, all elements in `files` are writable.
So all elements in `files` are scanned.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/bundler.rb b/lib/bundler.rb
index 9a9129e07b..0b6f70d9df 100644
--- a/lib/bundler.rb
+++ b/lib/bundler.rb
@@ -366,9 +366,9 @@ EOF
 
         # if any directory is not writable, we need sudo
         files = [path, bin_dir] | Dir[bundle_path.join("build_info/*").to_s] | Dir[bundle_path.join("*").to_s]
-        sudo_needed = files.any? {|f| !File.writable?(f) }
+        unwritable_files = files.reject {|f| File.writable?(f) }
+        sudo_needed = !unwritable_files.empty?
         if sudo_needed
-          unwritable_files = files.reject {|f| File.writable?(f) }
           Bundler.ui.warn "Following files may not be writable, so sudo is needed: #{unwritable_files.map(&:to_s).join(",")}"
         end
       end