From: Sitaram Chamarty <sitaramc@gmail.com>
Date: Tue, 18 Dec 2012 04:17:33 GMT
Subject: Re: bug? 'git log -M100' is different from 'git log -M100%'
Message-ID: <CAMK1S_jVuJgmdb47A=SGV7_9uH2SEj-SHYFdSY_7nSuLCNxdkQ@mail.gmail.com>
In-Reply-To: <7vfw34jgmv.fsf@alter.siamese.dyndns.org>

On Tue, Dec 18, 2012 at 6:55 AM, Junio C Hamano <gitster@pobox.com> wrote:
> Sitaram Chamarty <sitaramc@gmail.com> writes:
>
>> When using -M with a number to act as a threshold for declaring
>> a change as being a rename, I found a... quirk.  Any 2-digit
>> number after the M will work,...
>
> That is not 2-digit number.
>
> A few historical trivia may help.
>
> Originally we said "you can use -M2 to choose 2/10" (like "gzip"
> taking compression levels between "-0" to "-9").  Then Linus came up
> with a clever idea to let people specify arbitrary precision by
> letting you say "-M25" to mean 25/100 and "-M254" to mean 254/1000.
>
> Read the numbers without per-cent as if it has decimal point before
> it (i.e. -M005 is talking about 0.005 which is 0.5%).  Full hundred
> per-cent has to be spelled with per-cent sign for obvious reasons
> with this scheme but that cannot be avoided.  It is a special case.

Oh nice.  Makes sense; thanks!

I submitted a patch to diff-options.txt (separately).

regards

sitaram