Re: t5562: gzip -k is not portable

["Torsten Bögershausen" <tboegi@web.de>]

On Tue, Jun 19, 2018 at 04:53:10PM -0400, Jeff King wrote:
> On Tue, Jun 19, 2018 at 10:40:16PM +0200, Torsten Bögershausen wrote:
> 
> > 
> > 
> > On 06/19/2018 08:22 PM, Eric Sunshine wrote:
> > > On Tue, Jun 19, 2018 at 2:06 PM Junio C Hamano <gitster@pobox.com> wrote:
> > > > Torsten Bögershausen <tboegi@web.de> writes:
> > > > > t5562 fails here under MacOS:
> > > > > "gzip -k"  is not portable.
> > > Very odd. Stock /usr/bin/gzip on my MacOS 10.12.6 _does_ recognize -k,
> > > and the test does pass.
> > 
> > This is the test box running Mac OS X 10.6 speaking.
> > The -c seems to need even -f.
> > But this doesn't work either:
> > 
> > gzip 1.3.12
> > Copyright (C) 2007 Free Software Foundation, Inc.
> > Copyright (C) 1993 Jean-loup Gailly.
> > This is free software.  You may redistribute copies of it under the terms of
> > the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
> > There is NO WARRANTY, to the extent permitted by law.
> 
> Ah, that's it. "-k" came about in gzip v1.6. That's 5 years old, but
> obviously some people are still running it.
> 
> "-c" goes back quite a while and should be safe, I think.
> 
> > expecting success:
> >     gzip -f -c fetch_body >fetch_body.gz &&
> >     test_copy_bytes 10 <fetch_body.gz >fetch_body.gz.trunc &&
> >     gzip -f -c push_body >push_body,gz &&
> >     test_copy_bytes 10 <push_body.gz >push_body.gz.trunc
> > 
> > ./test-lib.sh: line 632: push_body.gz: No such file or directory
> 
> Typo in the ">" redirect (comma instead of period)?
> 
> -Peff

Good eyes, thanks.
The "-f -c" combo works:

-       gzip -k fetch_body &&
+       gzip -f -c fetch_body >fetch_body.gz &&
        test_copy_bytes 10 <fetch_body.gz >fetch_body.gz.trunc &&
-       gzip -k push_body &&
+       gzip -f -c push_body >push_body.gz &&