Re: `git patch-id --stable' vs quoted-printable

From: Junio C Hamano <gitster@pobox.com>
Date: Aug 22, 2022, 04:18 UTC
Message-ID: <xmqq7d30gbcd.fsf@gitster.g>
In-Reply-To: <xmqqczcsgbvn.fsf@gitster.g>

Junio C Hamano <gitster@pobox.com> writes:

>> So, I'm wondering if the search indexing code of public-inbox
>> should s/^$/ /mgs before feeding stuff to `git patch-id'; and/or
>> if `git patch-id' should be assuming empty lines and lines with a
>> single SP are the same...

Another potential source of issues (not for the patch from René that was used as an example) is that a patch producer can use different diff algorithm from the setting you would use to index resulting commits via "git show | git patch-id".

    $ git show -U5 | git patch-id
    $ git show | git patch-id

likely result in different patch IDs.

The --patience and the --histogram options affect how common lines are matched up, again affecting the shape of the patches you compute patch-ids over.