Re: non-interactive extracting the contents of a tar-file

[Klaus Berndl <klaus.berndl@sdm.de>]

On 28 Jun 2005, Tim X. wrote:

>  Klaus Berndl <klaus.berndl@sdm.de> writes:
>  
> > On Mon, 27 Jun 2005, Peter Dyballa wrote:
> > >  
> > >  Am 27.06.2005 um 12:23 schrieb Klaus Berndl:
> > >  
> > > > Is it possible with tar-mode (or other already existing elisp-code),
> > > > to extract the full contents of a tar-file to a certain directory (or
> > > > at least to default-directory)?
> > >  
> > >  There is an easier work-around in Emacs shell:
> > >  
> > >  cd <some directory>
> > >  tar xf <some tar file>
> > 
> > Hmm, i forgot to mention that i want it do without external programs like
> > tar and gz!
> > 
>  But doesn't emacs tar-mode just use tar 'under the hood'?

No, untarring is done via elisp - see tar-mode.el

>  
>  It may be possible to work out how to extract files from a tar archive
>  reasonably easily, but the unzipping/decompressing is going to be
>  difficult/impossible. Also, keep in mind that as GNU tar also supports
>  bzip2 compression, we are likely to see archive.tar.bz2 as well as
>  archive.tar.gz more often.

yes, good point!

>  
>  Why the need not to use the correct tools? Is it because of platforms
>  which may not have tar or tar and gunzip equivelants and if so, what
>  platforms?

I had the wish to do it completely from within Emacs for my package so the
user has no need for installing stuff like tar or gzip (especially in
Windows-envs) - but the latter one is impossible, i see it now...

Klaus


>  
>  Tim

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