From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 12 Mar 2024 00:13:45 GMT
Subject: Re: [PATCH 5/5] MyFirstObjectWalk: add stderr to pipe processing
Message-ID: <xmqqh6hcmhmu.fsf@gitster.g>
In-Reply-To: <a2d30eff217e560873c49fe45116c784dc12fd32.1710192973.git.dirk@gouders.net>

Dirk Gouders <dirk@gouders.net> writes:

> In the last chapter of this document, pipes are used in commands to
> filter out the first/last trace messages.  But according to git(1),
> trace messages are sent to stderr if GIT_TRACE is set to '1', so those
> commands do not produce the described results.
>
> Fix this by using the operator '|&' to additionally connect stderr to
> stdin of the latter command.

Isn't |& a bash-ism?

    upstream command >&2 | downstream command

is how you would do the same more portably.