linux-kernel - Re: git vs hg commit counts?

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Message-ID: <7v8wexd6zq.fsf@alter.siamese.dyndns.org>
Date:	Mon, 26 Oct 2009 17:18:33 -0700
From:	Junio C Hamano <gitster@...ox.com>
To:	Joe Perches <joe@...ches.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, git <git@...r.kernel.org>,
	mercurial@...enic.com, Marti Raudsepp <marti@...fo.org>
Subject: Re: git vs hg commit counts?

Joe Perches <joe@...ches.com> writes:

> I'm comparing linux-kernel git vs hg repositories.
>
> While testing some changes to scripts/get_maintainer.pl,
> I noticed that git and hg have different commit counts
> for the same files.
>
> For instance:
>
> $ git log --since=1-year-ago -- MAINTAINERS | \
> 	grep -P "^commit [0-9a-f]{40,40}$"  | wc -l
> 514
>
> $ hg log --template="commit {node}\n" --date -365 -- MAINTAINERS  | \
> 	grep -P "^commit [0-9a-f]{40,40}$" | wc -l
> 601
>
> Anyone have any understanding why?

We simplify a merge history by discarding one branch when the merge result
matches one of the parents.  Does "hg" know how to do that as well?

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