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proc
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root
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opt
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alt
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ruby33
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rubygems
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rubygems
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package
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Filename :
tar_reader.rb
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# frozen_string_literal: true # rubocop:disable Style/AsciiComments # Copyright (C) 2004 Mauricio Julio Fernández Pradier # See LICENSE.txt for additional licensing information. # rubocop:enable Style/AsciiComments ## # TarReader reads tar files and allows iteration over their items class Gem::Package::TarReader include Enumerable ## # Creates a new TarReader on +io+ and yields it to the block, if given. def self.new(io) reader = super return reader unless block_given? begin yield reader ensure reader.close end nil end ## # Creates a new tar file reader on +io+ which needs to respond to #pos, # #eof?, #read, #getc and #pos= def initialize(io) @io = io @init_pos = io.pos end ## # Close the tar file def close end ## # Iterates over files in the tarball yielding each entry def each return enum_for __method__ unless block_given? until @io.eof? do begin header = Gem::Package::TarHeader.from @io rescue ArgumentError => e # Specialize only exceptions from Gem::Package::TarHeader.strict_oct raise e unless e.message.match?(/ is not an octal string$/) raise Gem::Package::TarInvalidError, e.message end return if header.empty? entry = Gem::Package::TarReader::Entry.new header, @io yield entry entry.close end end alias_method :each_entry, :each ## # NOTE: Do not call #rewind during #each def rewind if @init_pos == 0 @io.rewind else @io.pos = @init_pos end end ## # Seeks through the tar file until it finds the +entry+ with +name+ and # yields it. Rewinds the tar file to the beginning when the block # terminates. def seek(name) # :yields: entry found = find do |entry| entry.full_name == name end return unless found yield found ensure rewind end end require_relative "tar_reader/entry"