From: Matthijs Kooijman <matthijs@stdin.nl>
To: Junio C Hamano <gitster@pobox.com>
Cc: Duy Nguyen <pclouds@gmail.com>,
Jonathan Nieder <jrnieder@gmail.com>,
Stefan Beller <stefanbeller@googlemail.com>,
schlotter@users.sourceforge.net, Ralf.Wildenhues@gmx.de,
git@vger.kernel.org
Subject: Re: [PATCH] git clone depth of 0 not possible.
Date: Tue, 28 May 2013 11:18:12 +0200 [thread overview]
Message-ID: <20130528091812.GG25742@login.drsnuggles.stderr.nl> (raw)
In-Reply-To: <7vvcb8f6aw.fsf@alter.siamese.dyndns.org>
Hi Junio,
I'm interested in getting a fetch tip commit only feature into git, I'll
probably look into creating a patch for this.
> >>> Sounds buggy. Would anything break if we were to make --depth=1 mean
> >>> "1 deep, including the tip commit"?
> >>
> >> As long as we do not change the meaning of the "shallow" count going
> >> over the wire (i.e. the number we receive from the user will be
> >> fudged, so that user's "depth 1" that used to mean "the tip and one
> >> behind it" is expressed as "depth 2" at the end-user level, and we
> >> send over the wire the number that corresponded to the old "depth
> >> 1"), I do not think anything will break, and then --depth=0 may
> >> magically start meaning "only the tip; its immediate parents will
> >> not be transferred and recorded as the shallow boundary in the
> >> receiving repository".
> >
> > I'd rather we reserve 0 for unlimited fetch, something we haven't done
> > so far [1]. And because "unlimited clone" with --depth does not make
> > sense, --depth=0 should be rejected by git-clone.
>
> I actually was thinking about changing --depth=1 to mean "the tip,
> with zero commits behind it" (and that was consistent with my
> description of "fudging"), but ended up saying "--depth=0" by
> mistake. I too think "--depth=0" or "--depth<0" does not make
> sense, so we are in agreement.
Did you consider how to implement this? Looking at the code, it seems
the "deepen" parameter in the wire protocol now means:
- 0: Do not change anything about the shallowness (i.e., fetch
everything from the shallow root to the tip).
- > 0: Create new shallow commits at depth commits below the tip (so
depth == 1 means tip and one below).
- INFINITE_DEPTH (0x7fffffff): Remove all shallowness and fetch
complete history.
Given this, I'm not sure how one can express "fetch the tip and nothing
below that", since depth == 0 already has a different meaning.
Of course, one could using depth == 1 in this case to receive two
commits and then drop one, but this would seem a bit pointless to me
(especially if the commit below the tip is very different from the tip
leading to a lot of useless data transfer).
Or did I misunderstand something here?
Gr.
Matthijs
next prev parent reply other threads:[~2013-05-28 9:18 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-07 18:06 [PATCH] git clone depth of 0 not possible Stefan Beller
2013-01-07 18:06 ` [PATCH] Documentation on depth option in git clone Stefan Beller
2013-01-08 6:28 ` [PATCH] git clone depth of 0 not possible Jonathan Nieder
2013-01-08 6:54 ` Junio C Hamano
2013-01-08 7:36 ` Junio C Hamano
2013-01-08 8:19 ` Junio C Hamano
2013-01-08 14:28 ` Duy Nguyen
2013-01-08 14:32 ` Stefan Beller
2013-01-08 14:45 ` Duy Nguyen
2013-01-08 17:24 ` Junio C Hamano
2013-01-08 7:38 ` Duy Nguyen
2013-01-08 8:05 ` Junio C Hamano
2013-05-28 9:18 ` Matthijs Kooijman [this message]
2013-05-28 16:28 ` Jonathan Nieder
2013-05-28 16:31 ` Jonathan Nieder
2013-05-28 16:34 ` Matthijs Kooijman
2013-05-28 16:58 ` Jonathan Nieder
2013-05-28 17:04 ` Junio C Hamano
2013-05-30 8:23 ` Matthijs Kooijman
2013-06-02 19:14 ` Junio C Hamano
2013-07-09 13:35 ` Matthijs Kooijman
2013-07-11 10:57 ` Matthijs Kooijman
2013-07-11 11:25 ` [PATCH 1/3] upload-pack: Remove a piece of dead code Matthijs Kooijman
2013-07-11 11:25 ` [PATCH 2/3] upload-pack: Introduce new "fixed-off-by-one-depth" server feature Matthijs Kooijman
2013-07-11 11:25 ` [PATCH 3/3] fetch-pack: Request fixed-off-by-one-depth when available Matthijs Kooijman
2013-07-11 12:08 ` [PATCH 1/3] upload-pack: Remove a piece of dead code Duy Nguyen
2013-07-11 15:49 ` Junio C Hamano
2013-01-08 7:33 ` [PATCH] git clone depth of 0 not possible Duy Nguyen
2013-01-08 7:37 ` Junio C Hamano
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