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Update to RubyGems 1.3.4 r2223
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23659 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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drbrain
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126 changed files with 7610 additions and 3747 deletions
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# See LICENSE.txt for permissions.
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#++
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require 'rubygems'
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require 'fileutils'
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require 'yaml'
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require 'zlib'
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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 and provides
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# the capability to read gem files
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class Gem::OldFormat
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attr_accessor :spec, :file_entries, :gem_path
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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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# Constructs an instance of a Format object, representing the gem's data
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# structure.
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#
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class OldFormat
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attr_accessor :spec, :file_entries, :gem_path
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# gem:: [String] The file name of the gem
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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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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 the
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# 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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def self.from_file_by_path(file_path)
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unless File.exist?(file_path)
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raise Gem::Exception, "Cannot load gem file [#{file_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)
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unless File.exist?(file_path)
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raise Gem::Exception, "Cannot load gem file [#{file_path}]"
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end
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File.open(file_path, 'rb') do |file|
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from_io(file, file_path)
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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)")
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format = self.new(gem_path)
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skip_ruby(io)
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format.spec = read_spec(io)
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format.file_entries = []
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read_files_from_gem(io) do |entry, file_data|
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format.file_entries << [entry, file_data]
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end
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format
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end
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private
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##
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# Skips the Ruby self-install header. After calling this method, the
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# IO index will be set after the Ruby code.
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#
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# file:: [IO] The IO to process (skip the Ruby code)
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#
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def self.skip_ruby(file)
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end_seen = false
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loop {
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line = file.gets
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if(line == nil || line.chomp == "__END__") then
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end_seen = true
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break
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end
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}
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if(end_seen == false) then
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raise Gem::Exception.new("Failed to find end of ruby script while reading gem")
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end
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end
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##
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# Reads the specification YAML from the supplied IO and constructs
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# a Gem::Specification from it. After calling this method, the
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# IO index will be set after the specification header.
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#
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# file:: [IO] The IO to process
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#
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def self.read_spec(file)
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yaml = ''
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begin
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read_until_dashes(file) do |line|
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yaml << line
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end
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Specification.from_yaml(yaml)
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rescue YAML::Error => e
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raise Gem::Exception.new("Failed to parse gem specification out of gem file")
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rescue ArgumentError => e
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raise Gem::Exception.new("Failed to parse gem specification out of gem file")
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end
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end
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##
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# Reads lines from the supplied IO until a end-of-yaml (---) is
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# reached
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#
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# file:: [IO] The IO to process
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# block:: [String] The read line
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#
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def self.read_until_dashes(file)
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while((line = file.gets) && line.chomp.strip != "---") do
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yield line
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end
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end
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##
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# Reads the embedded file data from a gem file, yielding an entry
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# containing metadata about the file and the file contents themselves
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# for each file that's archived in the gem.
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# NOTE: Many of these methods should be extracted into some kind of
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# Gem file read/writer
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#
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# gem_file:: [IO] The IO to process
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#
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def self.read_files_from_gem(gem_file)
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errstr = "Error reading files from gem"
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header_yaml = ''
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begin
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self.read_until_dashes(gem_file) do |line|
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header_yaml << line
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end
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header = YAML.load(header_yaml)
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raise Gem::Exception.new(errstr) unless header
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header.each do |entry|
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file_data = ''
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self.read_until_dashes(gem_file) do |line|
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file_data << line
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end
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yield [entry, Zlib::Inflate.inflate(file_data.strip.unpack("m")[0])]
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end
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rescue Exception,Zlib::DataError => e
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raise Gem::Exception.new(errstr)
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end
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File.open(file_path, 'rb') do |file|
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from_io(file, file_path)
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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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def self.from_io(io, gem_path="(io)")
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format = self.new(gem_path)
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skip_ruby(io)
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format.spec = read_spec(io)
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format.file_entries = []
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read_files_from_gem(io) do |entry, file_data|
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format.file_entries << [entry, file_data]
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end
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format
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end
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private
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##
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# Skips the Ruby self-install header. After calling this method, the
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# IO index will be set after the Ruby code.
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#
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# file:: [IO] The IO to process (skip the Ruby code)
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def self.skip_ruby(file)
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end_seen = false
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loop {
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line = file.gets
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if(line == nil || line.chomp == "__END__") then
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end_seen = true
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break
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end
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}
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if end_seen == false then
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raise Gem::Exception.new("Failed to find end of ruby script while reading gem")
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end
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end
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##
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# Reads the specification YAML from the supplied IO and constructs
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# a Gem::Specification from it. After calling this method, the
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# IO index will be set after the specification header.
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#
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# file:: [IO] The IO to process
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def self.read_spec(file)
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yaml = ''
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read_until_dashes file do |line|
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yaml << line
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end
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Gem::Specification.from_yaml yaml
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rescue YAML::Error => e
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raise Gem::Exception, "Failed to parse gem specification out of gem file"
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rescue ArgumentError => e
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raise Gem::Exception, "Failed to parse gem specification out of gem file"
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end
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##
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# Reads lines from the supplied IO until a end-of-yaml (---) is
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# reached
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#
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# file:: [IO] The IO to process
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# block:: [String] The read line
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def self.read_until_dashes(file)
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while((line = file.gets) && line.chomp.strip != "---") do
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yield line
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end
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end
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##
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# Reads the embedded file data from a gem file, yielding an entry
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# containing metadata about the file and the file contents themselves
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# for each file that's archived in the gem.
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# NOTE: Many of these methods should be extracted into some kind of
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# Gem file read/writer
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#
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# gem_file:: [IO] The IO to process
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def self.read_files_from_gem(gem_file)
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errstr = "Error reading files from gem"
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header_yaml = ''
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begin
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self.read_until_dashes(gem_file) do |line|
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header_yaml << line
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end
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header = YAML.load(header_yaml)
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raise Gem::Exception, errstr unless header
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header.each do |entry|
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file_data = ''
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self.read_until_dashes(gem_file) do |line|
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file_data << line
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end
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yield [entry, Zlib::Inflate.inflate(file_data.strip.unpack("m")[0])]
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end
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rescue Zlib::DataError => e
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raise Gem::Exception, errstr
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end
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end
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end
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