# File lib/rubygems/format.rb, line 37 def self.from_file_by_path(file_path, security_policy = nil) format = nil unless File.exist?(file_path) raise Gem::Exception, "Cannot load gem at [#{file_path}] in #{Dir.pwd}" end # check for old version gem if File.read(file_path, 20).include?("MD5SUM =") #alert_warning "Gem #{file_path} is in old format." require 'rubygems/old_format' format = OldFormat.from_file_by_path(file_path) else begin f = File.open(file_path, 'rb') format = from_io(f, file_path, security_policy) ensure f.close unless f.closed? end end return format end