# File lib/rubygems/source_index.rb, line 239 def update(source_uri) use_incremental = false begin gem_names = fetch_quick_index source_uri remove_extra gem_names missing_gems = find_missing gem_names use_incremental = missing_gems.size <= INCREMENTAL_THRESHHOLD rescue Gem::OperationNotSupportedError => ex use_incremental = false end if use_incremental then update_with_missing source_uri, missing_gems else new_index = fetch_bulk_index source_uri @gems.replace new_index.gems end self end