From mboxrd@z Thu Jan  1 00:00:00 1970
From: Etienne Vallette d'Osia <Etienne.VallettedOsia@gmail.com>
Subject: Re: On git 1.6 (novice's opinion)
Date: Fri, 27 Mar 2009 11:57:45 +0100
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References: <49CC8C90.12268.242CEFCE@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de>, <20090327090554.5d6160f2@pc09.procura.nl> <49CCAF5D.21814.24B4DE63@Ulrich.Windl.rkdvmks1.ngate.uni-regensburg.de>
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Cc: "H.Merijn Brand" <h.m.brand@xs4all.nl>, git@vger.kernel.org
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Ulrich Windl a =E9crit :
>>> 3) "git undo": If possible undo the effects of the last command.
>=20
> If impossible, add confirmations for some "dangerous" (non-obvious) c=
ommands=20
> before doing possibly harmful things. Maybe adding a kind of "user-le=
vel setting"=20
> (novice, expert, guro) could control such confirmations.
>=20
Why ?
All objects stored are immutable, and some tools keep informations=20
(ORIGIN_HEAD, refs/original) to allow a undo hand-made.
Moreover the reflog (and stash if you want to use it for this use) stor=
e=20
  informations during time...

So it's possible to provide a generic undo for all commands that change=
=20
refs.

Maybe an "undo" directory in $GIT_DIR, which will a keep a copy version=
=20
of all refs. Every commands store the current refs in this folder _befo=
re_
to change anything, and the undo restore them all.
At least, a "lastcmd" (for example) file could be added in this=20
directory to allow an more clever undo.