# [RFC] cg-log -r order:matters

2 messages from 2005-08-23 to 2005-09-21. Participants: Martin Langhoff, Petr Baudis.
Thread: https://gitlist.dev/t/1621

## Martin Langhoff, 2005-08-23 11:12

Subject: [RFC] cg-log -r order:matters
Message-ID: <46a038f905082304126e8ecd65@mail.gmail.com>
URL: https://gitlist.dev/e/46a038f905082304126e8ecd65%40mail.gmail.com

```
It's sometimes unclear which head is "ahead" of the other. If I get
the order wrong, cg-log shows no log output. Is this expected?

I was expecting a warning, or a reverse-ordered log. Or both. ;)


martin

```

## Petr Baudis, 2005-09-21 13:46

Subject: Re: [RFC] cg-log -r order:matters
Message-ID: <20050921134638.GA17981@pasky.or.cz>
URL: https://gitlist.dev/e/20050921134638.GA17981%40pasky.or.cz
In-Reply-To: <46a038f905082304126e8ecd65@mail.gmail.com>

```
Dear diary, on Tue, Aug 23, 2005 at 01:12:58PM CEST, I got a letter
where Martin Langhoff <martin.langhoff@gmail.com> told me that...
> It's sometimes unclear which head is "ahead" of the other. If I get
> the order wrong, cg-log shows no log output. Is this expected?
> 
> I was expecting a warning, or a reverse-ordered log. Or both. ;)

The thing is, how cg-log -r from:to is implemented is really "show me
all the ancestors of $to excepts ancestors of $from". So if $to is
an ancestor of $from, it will logically show nothing. But checking that
condition separately would take _very_ long time. And just producing a
warning when log output would be empty, that seems too noisy to me.

-- 
				Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
VI has two modes: the one in which it beeps and the one in which
it doesn't.

```