From: Bagas Sanjaya Date: Sun, 16 May 2021 12:00:15 GMT Subject: Re: [PATCH] describe-doc: clarify default length of abbreviation Message-ID: <1dc7877e-adb4-e3f5-3b59-bd45f9673596@gmail.com> In-Reply-To: On 16/05/21 14.32, Anders Höckersten via GitGitGadget wrote: > --abbrev=:: > - Instead of using the default 7 hexadecimal digits as the > - abbreviated object name, use digits, or as many digits > - as needed to form a unique object name. An of 0 > - will suppress long format, only showing the closest tag. > + Instead of using the default number of hexadecimal digits (which > + will vary according to the size of the repository with a default of > + 7) of the abbreviated object name, use digits, or as many digits > + as needed to form a unique object name. An of 0 will suppress > + long format, only showing the closest tag. > I think the more correct is the abbreviated hash length is determined by number of objects. > --candidates=:: > Instead of considering only the 10 most recent tags as > @@ -139,8 +140,11 @@ at the end. > > The number of additional commits is the number > of commits which would be displayed by "git log v1.0.4..parent". > -The hash suffix is "-g" + unambiguous abbreviation for the tip commit > -of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). > +The hash suffix is "-g" + an unambigous abbreviation for the tip commit > +of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). The > +length of the abbreviation scales as the repository grows, using the > +approximate number of objects in the repository and a bit of math > +around the birthday paradox, and defaults to a minimum of 7. What is the birthday paradox then? Also, better say "... and by default the minimum length is 7.". Thanks. -- An old man doll... just what I always wanted! - Clara