From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 08 Apr 2019 06:44:25 GMT
Subject: Re: [PATCH 2/7] t: introduce tests for unexpected object types
Message-ID: <xmqqbm1h9et2.fsf@gitster-ct.c.googlers.com>
In-Reply-To: <CAPig+cQ7f6C-YBE5LT3qiXSyjpqQQEknmE8eHdQJvzCAzkBNPA@mail.gmail.com>

Eric Sunshine <sunshine@sunshineco.com> writes:

> On Fri, Apr 5, 2019 at 2:24 PM Jeff King <peff@peff.net> wrote:
>> On Fri, Apr 05, 2019 at 12:50:33PM +0200, SZEDER Gábor wrote:
>> > > +   git cat-file commit $commit |
>> > > +           perl -lpe "/^author/ && print q(parent $blob)" \
>> > > +           >broken-commit &&
>>
>> > Wouldn't a 'sed' one-liner suffice, so we won't have yet another perl
>> > dependency?
>>
>> Heh, this was actually the subject of much discussion before the patches
>> hit the list. If you can write such a one-liner that is both readable
>> and portable, please share it. I got disgusted with sed and suggested
>> this perl.
>
> Trivial and portable 'sed' equivalent:
>
> git cat-file commit $commit | sed "/^author/ { h; s/.*/parent $blob/; G; }"

Looks good.  I had a bit of head scratching moment when I saw that
"perl -lpe" one-liner; this sed expression may not be crystal clear
to those who are not used to, but it is not so bad, either.