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From: "Bart Schaefer" <schaefer@brasslantern.com>
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Date: Sun, 23 Feb 2003 01:55:55 +0000
In-Reply-To: <87lm073h95.fsf@cine.davh.dk>
Comments: In reply to Dennis Haney <davh@davh.dk>
        "tar bzip" (Feb 23,  2:41am)
References: <87lm073h95.fsf@cine.davh.dk>
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To: Dennis Haney <davh@davh.dk>, zsh-users@sunsite.dk
Subject: Re: tar bzip
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On Feb 23,  2:41am, Dennis Haney wrote:
} 
} xvzf is in my fingers and I keep forgetting it every time I untar a
} bzip file, so:
} 
} How is it possible to get tar xvzf something.tbz (or
} something.tar.bz2) to convert the z (in xvzf) to a j?

Possibly this:

    function tar {
      integer i=1
      while (( i < ARGC ))
      do
	if [[ $argv[i] == (x*v|v*x)*f && $argv[i] == *z* &&
	      $argv[i+1] == *.(t|)bz(|2) ]]
	   argv[i]=${argv[i]:s/z/j}
	   break
	fi
      done
      command tar $*
    }

The problem of course is that something like xvzbf is followed first by
a blocksize and then by a file name, so without creating a full-blown
tar option parser you really can't do a perfect job.