From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff King <peff@peff.net>
Subject: Re: [PATCH 3/3] git checkout --nodwim
Date: Mon, 26 Oct 2009 17:26:28 -0400
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Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	David Roundy <roundyd@physics.oregonstate.edu>,
	Junio C Hamano <gitster@pobox.com>,
	Nanako Shiraishi <nanako3@lavabit.com>,
	Alex Riesen <raa.lkml@gmail.com>, git@vger.kernel.org,
	Jay Soffian <jaysoffian@gmail.com>
To: Avery Pennarun <apenwarr@gmail.com>
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On Mon, Oct 26, 2009 at 04:40:41PM -0400, Avery Pennarun wrote:

> I don't think there's actually a plumbing alternative to git-checkout,
> however.  My git-subtree script (and another script at work) have
> already had some bugs because of this (specifically, the differing
> behaviour of git-checkout with and without a path specified).  Is
> there something else I should be using in my scripts to be maximally
> safe?

It's git-update-ref. Which highlights one problem with the
porcelain/plumbing distinction. Our plumbing building blocks work at a
very low level, but often when scripting you want to use higher level
building blocks. So porcelain gets used in scripts, and gets an
ambiguous state. Consider "git commit", for example. Does anyone
actually script around "write-tree" and "commit-tree" these days, or do
they just script around "git commit"?

-Peff