Add debug info

1 files changed, 11 insertions, 3 deletions

diff --git a/lib/bundler/fetcher/compact_index.rb b/lib/bundler/fetcher/compact_index.rb
index f36d76d4ae..2a92935473 100644
--- a/lib/bundler/fetcher/compact_index.rb
+++ b/lib/bundler/fetcher/compact_index.rb
@@ -68,13 +68,21 @@ module Bundler
       compact_index_request :fetch_spec
 
       def available?
-        return nil unless SharedHelpers.md5_available?
+        unless SharedHelpers.md5_available?
+          Bundler.ui.debug("Compact Index API not available due to md5 not available")
+          return nil
+        end
+
         user_home = Bundler.user_home
-        return nil unless user_home.directory? && user_home.writable?
+        unless user_home.directory? && user_home.writable?
+          Bundler.ui.debug("Compact Index API not available due to user home not writable")
+          return nil
+        end
+
         # Read info file checksums out of /versions, so we can know if gems are up to date
         fetch_uri.scheme != "file" && compact_index_client.update_and_parse_checksums!
       rescue CompactIndexClient::Updater::MisMatchedChecksumError => e
-        Bundler.ui.debug(e.message)
+        Bundler.ui.debug("Compact Index API not available due to #{e.message}")
         nil
       end
       compact_index_request :available?