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From: Jeff King <peff@peff.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: Taylor Blau <me@ttaylorr.com>,
	git@vger.kernel.org, dstolee@microsoft.com
Subject: Re: [PATCH] builtin/repack.c: invalidate MIDX only when necessary
Date: Tue, 25 Aug 2020 14:27:45 -0400	[thread overview]
Message-ID: <20200825182745.GA1417288@coredump.intra.peff.net> (raw)
In-Reply-To: <xmqqh7sq1u0a.fsf@gitster.c.googlers.com>

On Tue, Aug 25, 2020 at 11:05:09AM -0700, Junio C Hamano wrote:

> Subject: [RFC] pack-redundant: gauge the usage before proposing its removal
> 
> The subcommand is unusably slow and the reason why nobody reports it
> as a performance bug is suspected to be the absense of users.  Let's
> disable the normal use of command by making it error out with a big
> message that asks the user to tell us that they still care about the
> command, with an escape hatch to override it with a command line
> option.

I like this direction. And I'm tempted to say it's OK to go straight
here given how generally useless the command is. But it feels like a big
jump for the initial change. While we give the user an easy escape
hatch, it might still break their scripts.

A more gentle transition would I guess be:

  1. Mention deprecation in release notes (hah, as if anybody reads
     them).

  2. Issue a warning but continue to behave as normal. That might break
     scripts that care a lot about stderr, but otherwise is harmless. No
     clue if anybody would actually see the message or not.

  3. Flip warning to error, as your patch does.

  4. Removal.

I'd guess we could do 1+2 in one release, then 3 a release or two later,
and then finally 4. I dunno. That's more tedious and I'll be surprised
if we get any bites, but maybe we ought to do it out of principle.

-Peff

  reply	other threads:[~2020-08-25 18:27 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-25  2:01 [PATCH] builtin/repack.c: invalidate MIDX only when necessary Taylor Blau
2020-08-25  2:26 ` Jeff King
2020-08-25  2:37   ` Taylor Blau
2020-08-25 13:14     ` Derrick Stolee
2020-08-25 14:41       ` Taylor Blau
2020-08-25 15:14         ` Derrick Stolee
2020-08-25 15:42           ` Taylor Blau
2020-08-25 16:56             ` Jeff King
2020-08-25 15:58   ` Junio C Hamano
2020-08-25 16:08     ` Taylor Blau
2020-08-25 16:18     ` Derrick Stolee
2020-08-25 17:34       ` Jeff King
2020-08-25 17:22     ` Jeff King
2020-08-25 18:05       ` Junio C Hamano
2020-08-25 18:27         ` Jeff King [this message]
2020-08-25 22:45           ` [PATCH] pack-redundant: gauge the usage before proposing its removal Junio C Hamano
2020-08-25 23:09             ` Taylor Blau
2020-08-25 23:22               ` Junio C Hamano
2020-08-26  1:17             ` [PATCH v1 0/3] War on dashed-git Junio C Hamano
2020-08-26  1:17               ` [PATCH v1 1/3] transport-helper: do not run git-remote-ext etc. in dashed form Junio C Hamano
2020-08-26  1:24                 ` Eric Sunshine
2020-08-26  7:55                   ` Johannes Schindelin
2020-08-26 16:27                   ` Junio C Hamano
2020-08-26  1:17               ` [PATCH v1 2/3] cvsexportcommit: do not run git programs " Junio C Hamano
2020-08-26  1:28                 ` Eric Sunshine
2020-08-26  1:42                   ` Junio C Hamano
2020-08-26 16:08                   ` Junio C Hamano
2020-08-26 16:28                     ` Junio C Hamano
2020-08-26  8:02                 ` Johannes Schindelin
2020-08-26  1:17               ` [PATCH v1 3/3] git: catch an attempt to run "git-foo" Junio C Hamano
2020-08-26  1:19                 ` Junio C Hamano
2020-08-26  8:06                 ` Johannes Schindelin
2020-08-26 16:30                   ` Junio C Hamano
2020-08-28  2:13                 ` Johannes Schindelin
2020-08-28 22:03                   ` Junio C Hamano
2020-08-31  9:59                     ` Johannes Schindelin
2020-08-31 17:45                       ` Junio C Hamano
2020-12-20 15:25                   ` Johannes Schindelin
2020-12-21 22:24                     ` Junio C Hamano
2020-12-30  5:30                       ` Johannes Schindelin
2020-08-26  8:09               ` [PATCH v1 0/3] War on dashed-git Johannes Schindelin
2020-08-26 16:45                 ` Junio C Hamano
2020-08-26 19:46                   ` [PATCH v2 0/2] avoid running "git-subcmd" in the dashed form Junio C Hamano
2020-08-26 19:46                     ` [PATCH v2 1/2] transport-helper: do not run git-remote-ext etc. in " Junio C Hamano
2020-08-26 19:46                     ` [PATCH v2 2/2] cvsexportcommit: do not run git programs " Junio C Hamano
2020-08-26 21:37                       ` [PATCH v2 3/2] credential-cache: use child_process.args Junio C Hamano
2020-08-26 22:25                         ` [PATCH] run_command: teach API users to use embedded 'args' more Junio C Hamano
2020-08-27  4:21                           ` Jeff King
2020-08-27  4:30                             ` Junio C Hamano
2020-08-27  4:31                             ` Eric Sunshine
2020-08-27  4:44                               ` Jeff King
2020-08-27  5:03                                 ` Eric Sunshine
2020-08-27  5:25                                   ` [PATCH] worktree: fix leak in check_clean_worktree() Jeff King
2020-08-27  5:56                                     ` Eric Sunshine
2020-08-27 15:31                                       ` Junio C Hamano
2020-08-27  4:13                         ` [PATCH v2 3/2] credential-cache: use child_process.args Jeff King
2020-08-27  4:22                           ` Jeff King
2020-08-27  4:31                           ` Junio C Hamano
2020-08-27  4:14                         ` Jeff King
2020-08-27 15:34                           ` Junio C Hamano
2020-08-31 22:56                         ` Junio C Hamano
2020-09-01  4:49                           ` Jeff King
2020-09-01 16:11                             ` Junio C Hamano
2020-08-27  0:57                     ` [PATCH v2 0/2] avoid running "git-subcmd" in the dashed form Derrick Stolee
2020-08-27  1:22                       ` Junio C Hamano
2020-08-28  9:14             ` [PATCH] pack-redundant: gauge the usage before proposing its removal Jeff King
2020-08-28 22:45               ` Junio C Hamano
2020-08-25  7:55 ` [PATCH] builtin/repack.c: invalidate MIDX only when necessary Son Luong Ngoc
2020-08-25 12:45   ` Derrick Stolee
2020-08-25 14:45   ` Taylor Blau
2020-08-25 16:04     ` [PATCH v2] " Taylor Blau
2020-08-26 20:51       ` Derrick Stolee
2020-08-26 20:54         ` Junio C Hamano
2020-08-25 16:47     ` [PATCH] " Jeff King
2020-08-25 17:10       ` Derrick Stolee
2020-08-25 17:29         ` Jeff King
2020-08-25 17:34           ` Taylor Blau
2020-08-25 17:42             ` Jeff King

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