From: Daniel Brumbaugh Keeney <devi.webmaster@...>
Date: 2008-03-11T09:01:27+09:00
Subject: Re: Getting files out of a .tar.gz archive

On Mon, Mar 10, 2008 at 12:43 PM, celldee <celldee@gmail.com> wrote:
> Hi Daniel,
>
>  I saw that, but I don't want to expand the .tar.gz any more than I
>  have to. The code that I put up earlier is getting what I want out of
>  the .tar file using Minitar::Reader which I quite like, I'm just
>  looking to eliminate the gunzip step. Minitar.unpack expands
>  the .tar.gz and writes the files to disk, which means that I'll have
>  to mess around in the filesystem more than I need to.
>
>  Thanks for your reply,
>
>  Chris


My apologies for failing to understand the issue. GZip and Minitar
both provide incremental readers, although I have not used them. I
believe the correct combination for what you're asking is this:

tgz = Zlib::GzipReader.new(File.open('test.tgz', 'rb'))
# Warning: tgz and the file will be closed.
reader = Minitar::Reader.new(tgz)
reader.each_entry do |file|
  #do something with each file, and break if you like
end
reader.close # does this do anything?
tgz.close

Daniel Brumbaugh Keeney