From: Jeff King <peff@peff.net>
Date: Fri, 10 Dec 2021 09:10:41 GMT
Subject: Re: [PATCH 05/19] t5516: drop unnecessary subshell and command invocation
Message-ID: <YbMZkdaEt6Q+MtR5@coredump.intra.peff.net>
In-Reply-To: <20211209051115.52629-6-sunshine@sunshineco.com>

On Thu, Dec 09, 2021 at 12:11:01AM -0500, Eric Sunshine wrote:

> To create its "expect" file, this test pipes into `sort` the output of
> `git for-each-ref` and a copy of that same output but with a minor
> textual transformation applied. To do so, it employs a subshell and
> commands `cat` and `sed` even though the same result can be accomplished
> by `sed` alone (without a subshell).

Clever. The ordering of output from sed is different than the original,
but because it all gets fed into sort anyway, that's OK.

In theory it could change the output of a stable sort of lines which
match (which won't be totally identical, because you are sorting with
-k3), but it seems we don't care in this instance.

-Peff