NoMethodError: undefined method `pos' for #<Bzip2::Reader:0xaa2bf5c>

[dadooda]

Hi

I'm trying to use bzip2-ruby to stream-in .tar.bz2 files via Gem::Package::TarReader.

BRIEF: It doesn't work yet due to this:

NoMethodError: undefined method `pos' for #<Bzip2::Reader:0xaa2bf5c>

Details follow.

require "bzip2-ruby"
require "rubygems/package"

#fn = "/path/to/file.tar"
fn = "/path/to/file.tar.bz2"
#fn = "/path/to/file.tar.gz"

stream = if fn.match /\.bz2\z/
  Bzip2::Reader.open(fn)
elsif fn.match /\.gz\z/
  Zlib::GzipReader.open(fn)
elsif fn.match /\.tar\z/
  File.open(fn)
else
  raise "Error: Don't know how to handle '#{fn}', aborting"
end

untar = Gem::Package::TarReader.new(stream)
untar.each do |entry|
  ...
end

Plain tar and .tar.gz work. .tar.bz2 doesn't, here's the exception info:

NoMethodError: undefined method `pos' for #<Bzip2::Reader:0xaad6394>
        from /home/rbdev/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/package/tar_reader.rb:42:in `initialize'
        from /home/rbdev/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/package/tar_reader.rb:23:in `new'
        from /home/rbdev/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/package/tar_reader.rb:23:in `new'

Thank you.

Alex