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From: Junio C Hamano <gitster@pobox.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: Jeff King <peff@peff.net>, Adam Majer <adamm@zombino.com>,
	git@vger.kernel.org
Subject: Re: git clone of empty repositories doesn't preserve hash
Date: Tue, 25 Apr 2023 15:24:47 -0700	[thread overview]
Message-ID: <xmqqcz3rzjkg.fsf@gitster.g> (raw)
In-Reply-To: <ZEhHsJh20gtiDBd9@tapette.crustytoothpaste.net> (brian m. carlson's message of "Tue, 25 Apr 2023 21:35:44 +0000")

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> So it looks like this has made it into master and works for v2 but
> breaks things for v0 and v1.  I noticed because the Git LFS testsuite is
> broken and the following test demonstrates it:
>
> ----- %< -----
> diff --git a/t/t5700-protocol-v1.sh b/t/t5700-protocol-v1.sh
> index 6c8d4c6cf1..3be5057579 100755
> --- a/t/t5700-protocol-v1.sh
> +++ b/t/t5700-protocol-v1.sh
> @@ -244,6 +244,17 @@ test_expect_success 'push with ssh:// using protocol v1' '
>  	grep "push< version 1" log
>  '
>  
> +test_expect_success 'clone propagates object-format from empty repo' '
> +	test_when_finished "rm -fr src256 dst256" &&
> +
> +	echo sha256 >expect &&
> +	git init --object-format=sha256 src256 &&
> +	git clone src256 dst256 &&
> +	git -C dst256 rev-parse --show-object-format >actual &&
> +
> +	test_cmp expect actual
> +'
> +
>  # Test protocol v1 with 'http://' transport
>  #
>  . "$TEST_DIRECTORY"/lib-httpd.sh
> ----- %< -----

Interesting.  I applied

 - the above addition to the t/t5700

 - reverse of 96f4113a (Merge branch 'jc/clone-object-format-from-void',
   2023-04-11), but only the part outside t/

on top of today's 'master', and tried to run t5700 and t5702 (the
latter has new tests added by 96f4113a to protect the change in the
topic from future breakage for v2).  It seems both t5700 and t5702
fails.

The latter failing is very much expected; the code change reverted
by the above experiment is what made it work in the first place.

But the former not working, after reverting the change, is totally
unexpected---doesn't it mean that the change in question does not
have much to do in the breakage?

In fact, the new test to 5700 applied on top of v2.40.1 fails, too.

Or are you complaining that the fix merged to 'master' only covers
the current protocol and not historical v0/v1 protocol?  I couldn't
tell, and didn't get that impression from the phrasing "breaks",
implying whatever that was "broken" used to be working.

Puzzled.

  reply	other threads:[~2023-04-25 22:24 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-05 10:28 git clone of empty repositories doesn't preserve hash Adam Majer
2023-04-05 19:04 ` Junio C Hamano
2023-04-05 19:47   ` Adam Majer
2023-04-05 20:01     ` Jeff King
2023-04-05 20:40       ` Junio C Hamano
2023-04-05 21:15         ` Junio C Hamano
2023-04-05 21:26           ` Jeff King
2023-04-05 22:48           ` brian m. carlson
2023-04-06 13:11           ` Adam Majer
2023-04-25 21:35           ` brian m. carlson
2023-04-25 22:24             ` Junio C Hamano [this message]
2023-04-25 23:12             ` Junio C Hamano
2023-04-26  0:20               ` brian m. carlson
2023-04-26 11:25                 ` Jeff King
2023-04-26 15:08                   ` Junio C Hamano
2023-04-26 15:13                     ` [PATCH] doc: GIT_DEFAULT_HASH is and will be ignored during "clone" Junio C Hamano
2023-04-26 21:06                       ` brian m. carlson
2023-04-27  4:46                     ` git clone of empty repositories doesn't preserve hash Jeff King
2023-04-26 10:51               ` Jeff King
2023-04-26 15:42                 ` Junio C Hamano
2023-04-26 20:40                 ` brian m. carlson
2023-04-26 20:53                   ` [PATCH 0/2] Fix empty SHA-256 clones with v0 and v1 brian m. carlson
2023-04-26 20:53                     ` [PATCH 1/2] http: advertise capabilities when cloning empty repos brian m. carlson
2023-04-26 21:14                       ` Junio C Hamano
2023-04-26 21:28                         ` brian m. carlson
2023-04-27  5:00                           ` Jeff King
2023-04-27  5:30                       ` Jeff King
2023-04-27 20:40                         ` Junio C Hamano
2023-04-26 20:53                     ` [PATCH 2/2] Honor GIT_DEFAULT_HASH for empty clones without remote algo brian m. carlson
2023-04-26 21:18                       ` Junio C Hamano
2023-04-26 21:33                       ` Junio C Hamano
2023-04-27  5:43                         ` Jeff King
2023-05-02 23:46                           ` Is GIT_DEFAULT_HASH flawed? Felipe Contreras
2023-05-03  9:03                             ` Adam Majer
2023-05-03 15:44                               ` Felipe Contreras
2023-05-03 17:21                                 ` Adam Majer
2023-05-08  0:34                                   ` Felipe Contreras
2023-05-03  9:09                             ` demerphq
2023-05-03 18:20                               ` Felipe Contreras
2023-05-03 22:54                             ` brian m. carlson
2023-05-08  2:00                               ` Felipe Contreras
2023-05-08 21:38                                 ` brian m. carlson
2023-05-09 10:32                                   ` Oswald Buddenhagen
2023-05-09 16:47                                     ` Junio C Hamano
2023-04-26 21:12                     ` [PATCH 0/2] Fix empty SHA-256 clones with v0 and v1 Junio C Hamano
2023-04-27  4:56                   ` git clone of empty repositories doesn't preserve hash Jeff King
2023-05-01 17:00                   ` [PATCH v2 0/1] Fix empty SHA-256 clones with v0 and v1 brian m. carlson
2023-05-01 17:00                     ` [PATCH v2 1/1] upload-pack: advertise capabilities when cloning empty repos brian m. carlson
2023-05-01 22:40                       ` Jeff King
2023-05-01 22:51                         ` Junio C Hamano
2023-05-01 17:37                     ` [PATCH v2 0/1] Fix empty SHA-256 clones with v0 and v1 Junio C Hamano
2023-05-17 19:24                   ` [PATCH v3 " brian m. carlson
2023-05-17 19:24                     ` [PATCH v3 1/1] upload-pack: advertise capabilities when cloning empty repos brian m. carlson
2023-05-17 21:48                     ` [PATCH v3 0/1] Fix empty SHA-256 clones with v0 and v1 Junio C Hamano
2023-05-17 22:28                       ` brian m. carlson
2023-05-18 18:28                     ` Jeff King
2023-05-19 15:32                       ` brian m. carlson
2023-04-05 21:23         ` git clone of empty repositories doesn't preserve hash Jeff King

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