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-rw-r--r--trunk/lib/rubygems/format.rb87
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diff --git a/trunk/lib/rubygems/format.rb b/trunk/lib/rubygems/format.rb
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-#--
-# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
-# All rights reserved.
-# See LICENSE.txt for permissions.
-#++
-
-require 'fileutils'
-
-require 'rubygems/package'
-
-module Gem
-
- ##
- # The format class knows the guts of the RubyGem .gem file format
- # and provides the capability to read gem files
- #
- class Format
- attr_accessor :spec, :file_entries, :gem_path
- extend Gem::UserInteraction
-
- ##
- # Constructs an instance of a Format object, representing the gem's
- # data structure.
- #
- # gem:: [String] The file name of the gem
- #
- def initialize(gem_path)
- @gem_path = gem_path
- end
-
- ##
- # Reads the named gem file and returns a Format object, representing
- # the data from the gem file
- #
- # file_path:: [String] Path to the gem file
- #
- 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 =")
- require 'rubygems/old_format'
-
- format = OldFormat.from_file_by_path(file_path)
- else
- open file_path, Gem.binary_mode do |io|
- format = from_io io, file_path, security_policy
- end
- end
-
- return format
- end
-
- ##
- # Reads a gem from an io stream and returns a Format object, representing
- # the data from the gem file
- #
- # io:: [IO] Stream from which to read the gem
- #
- def self.from_io(io, gem_path="(io)", security_policy = nil)
- format = new gem_path
-
- Package.open io, 'r', security_policy do |pkg|
- format.spec = pkg.metadata
- format.file_entries = []
-
- pkg.each do |entry|
- size = entry.header.size
- mode = entry.header.mode
-
- format.file_entries << [{
- "size" => size, "mode" => mode, "path" => entry.full_name,
- },
- entry.read
- ]
- end
- end
-
- format
- end
-
- end
-end