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72 lines
1.9 KiB
72 lines
1.9 KiB
#--
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# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
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# All rights reserved.
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# See LICENSE.txt for permissions.
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#++
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require 'rubygems/package'
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module Gem
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##
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# The format class knows the guts of the RubyGem .gem file format
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# and provides the capability to read gem files
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#
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class Format
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attr_accessor :spec, :file_entries, :gem_path
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extend Gem::UserInteraction
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##
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# Constructs an instance of a Format object, representing the gem's
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# data structure.
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#
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# gem:: [String] The file name of the gem
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#
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def initialize(gem_path)
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@gem_path = gem_path
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end
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##
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# Reads the named gem file and returns a Format object, representing
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# the data from the gem file
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#
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# file_path:: [String] Path to the gem file
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#
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def self.from_file_by_path(file_path, security_policy = nil)
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unless File.exist?(file_path)
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raise Gem::Exception, "Cannot load gem at [#{file_path}]"
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end
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require 'fileutils'
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# check for old version gem
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if File.read(file_path, 20).include?("MD5SUM =")
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#alert_warning "Gem #{file_path} is in old format."
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require 'rubygems/old_format'
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return OldFormat.from_file_by_path(file_path)
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else
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f = File.open(file_path, 'rb')
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return from_io(f, file_path, security_policy)
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end
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end
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##
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# Reads a gem from an io stream and returns a Format object, representing
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# the data from the gem file
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#
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# io:: [IO] Stream from which to read the gem
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#
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def self.from_io(io, gem_path="(io)", security_policy = nil)
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format = self.new(gem_path)
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Package.open_from_io(io, 'r', security_policy) do |pkg|
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format.spec = pkg.metadata
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format.file_entries = []
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pkg.each do |entry|
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format.file_entries << [{"size", entry.size, "mode", entry.mode,
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"path", entry.full_name}, entry.read]
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end
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end
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format
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end
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end
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end
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