On Fri, Feb 19, 2016 at 09:38:17AM -0800, Junio C Hamano wrote:

> Jeff King <p...@peff.net> writes:
> 
> > Yeah, I'd worry that "-a" is not portable. OTOH, BSD grep seems to have
> > it, so between that and GNU, I think most systems are covered. We could
> > do:
> >
> >   test_lazy_prereq GREP_A '
> >     echo foo | grep -a foo
> >   '
> >
> > and mark these tests with it. I'd also be happy to skip that step and
> > just do it if and when somebody actually complains about a system
> > without it (I wouldn't be surprised if most people on antique systems
> > end up installing GNU grep anyway).
> >
> > Another option might be using "sed -ne '/^author/p'" or similar. But
> > that may very well just be trading one portability problem for another.
> 
> Would $PERL help, I wonder?

It would, though I think you would need to call `binmode` to make it
reliable. I was hesitant to suggest it, because I seem to recall some
resistance to more perl dependencies in the test suite, but I think we
may be past the point of no return there, anyway.

-Peff
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