[Updater] Add a comment why we use IO.readseg-updater-read-comment

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/bundler/vendor/compact_index_client/lib/compact_index_client/updater.rb b/lib/bundler/vendor/compact_index_client/lib/compact_index_client/updater.rb
index 6142afb7c5..f19b1df3d7 100644
--- a/lib/bundler/vendor/compact_index_client/lib/compact_index_client/updater.rb
+++ b/lib/bundler/vendor/compact_index_client/lib/compact_index_client/updater.rb
@@ -61,6 +61,9 @@ class Bundler::CompactIndexClient
 
     def checksum_for_file(path)
       return nil unless path.file?
+      # This must use IO.read instead of Digest.file().hexdigest
+      # because we need to preserve \n line endings on windows when calculating
+      # the checksum
       Digest::MD5.hexdigest(IO.read(path))
     end
   end