From: Jeff King <peff@peff.net>
Date: Fri, 24 Jun 2016 21:09:06 GMT
Subject: Re: [PATCH v3 1/4] t5000: test tar files that overflow ustar headers
Message-ID: <20160624210906.GD6282@sigill.intra.peff.net>
In-Reply-To: <CAPig+cRD43DnaiZrT4ODnT7Nm5J8q=MhtSeyK3ZNjwaTW8mdbg@mail.gmail.com>

On Fri, Jun 24, 2016 at 04:58:58PM -0400, Eric Sunshine wrote:

> On Fri, Jun 24, 2016 at 3:07 PM, Jeff King <peff@peff.net> wrote:
> > On Fri, Jun 24, 2016 at 11:56:19AM -0700, Junio C Hamano wrote:
> >> Jeff King <peff@peff.net> writes:
> >> > +tar_info () {
> >> > +   "$TAR" tvf "$1" | awk '{print $3 " " $4}' | cut -d- -f1
> >> > +}
> >
> >> Seeing an awk piped into cut always makes me want to suggest a
> >> single sed/awk/perl invocation.
> >
> > I want the auto-splitting of awk, but then to auto-split the result
> > using a different delimiter. Is there a not-painful way to do that in
> > awk?
> 
> The awk split() function is POSIX and accepts an optional separator argument.

Thanks. I'm not that familiar with awk functions, simply because I came
of age after perl existed, and using perl tends to be more portable and
powerful (if you can assume it's available). But this is simple enough
that it should be OK.

Replacing it with:

        "$TAR" tvf "$1" |
        awk '{
                split($4, date, "-")
                print $3 " " date[1]
        }'

seems to work.

-Peff