From: Phillip Wood <phillip.wood123@gmail•com>
To: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo•com>,
phillip.wood@dunelm•org.uk,
Alexandr Miloslavskiy via GitGitGadget <gitgitgadget@gmail•com>,
git@vger•kernel.org
Cc: Junio C Hamano <gitster@pobox•com>
Subject: Re: [PATCH 5/5] commit: support the --pathspec-from-file option
Date: Wed, 11 Dec 2019 14:27:45 +0000 [thread overview]
Message-ID: <b9454df6-7d31-e255-84bd-8a1c548cffd7@gmail.com> (raw)
In-Reply-To: <2b573436-0ed2-9d24-f375-dfea0825a39e@syntevo.com>
Hi Alexandr
On 11/12/2019 11:43, Alexandr Miloslavskiy wrote:
> On 10.12.2019 11:42, Phillip Wood wrote:
>> I don't think it's so bad if the pathspec is cleaned up just after it
>> is used,
>> the diff below applies on top of your patch - see what you think. The
>> diff
>> also adds dies if --all is given with --pathspec-from-file which
>> (together
>> with a test) would be worth adding to you series I think.
>
> Unfortunately, your reply came too late, topic was cooking in pu/next
> for a while and merged into master yesterday: c58ae96f.
Ah I thought it might be a bit late to fix up the patch, there could
always be a follow patch though.
>
> I understand that your patch consists of two parts:
>
> 1) Adding test for --all
> ------------------------
> I must admit that I overlooked that there was a similar test for
> args-based pathspec. I will add this part in my next topic for
> --pathspec-from-file. I expect it to appear in the next day or two. I
> will try to remember to CC you to it.
Thanks, one other thing I forgot to mention yesterday is to ask what the
expected behavior is if the user passes an empty file to
--pathspec-from-file. With no pathspecs on the command line commit,
checkout, reset and restore-files all default to operating on all paths
but passing --pathspec-from-file implies the user wants to specify
specific paths so I think it would perhaps be better to error out if no
paths are given. There is a precedent for this in checkout-index which
does nothing if no paths are given (though I can't remember if it errors
out or not).
>
> 2) Moving parsing/validation into `parse_and_validate_options()`
> ------------------------
> Again, I agree that having parsing/validation outside is suboptimal.
> However, with current code, I find it to be a choice between two evils,
> and my choice was "outside but clear" to "inside but obscure".
>
> What I find obscure in your suggestion/patch is that innocently looking
> `prepare_index()` suddenly clears pathspec as well. It's even harder to
> see when called through `dry_run_commit()`.
It would be easy enough to clear pathspec in cmd_commit() I just didn't
bother to do it.
>
> Now, let me illustrate. There's a similar case in my TODO list, this
> time involving a real bug in git. In `init_db()`, the bug occurs in
> `set_git_dir(real_path(git_dir))`, also due to unexpected clearing.
>
> Now that I pointed my finger at it, please try to find what's wrong. I
> imagine that it won't be easy at all. And it's way harder when there's
> no reason to dig deep into a very specific line of code.
>
> I really try to avoid such type of pitfalls. That's why my choice
> between two evils is what I did.
If I had to hazard a guess I'd say that either set_git_dir() calls
real_path() which messes up the path passed to it or it does not copy
the path passed to it and it is messed up by some other code calling
real_path() after set_git_dir() has returned. If my guess is correct (I
wouldn't be surprised if it's wrong) I think that's a bit different to
the pathspec case as it's about the lifetime of the return value of a
function rather than a function freeing an argument passed to it.
Best Wishes
Phillip
next prev parent reply other threads:[~2019-12-11 14:27 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 19:26 [PATCH 0/5] Add --pathspec-from-file option for reset, commit Alexandr Miloslavskiy via GitGitGadget
2019-11-04 19:26 ` [PATCH 1/5] pathspec: add new function to parse file Alexandr Miloslavskiy via GitGitGadget
2019-11-05 15:02 ` Phillip Wood
2019-11-05 19:14 ` Alexandr Miloslavskiy
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-11-04 19:26 ` [PATCH 2/5] doc: reset: unify <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-06 4:01 ` Junio C Hamano
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-11-07 5:46 ` Junio C Hamano
2019-11-07 11:05 ` Alexandr Miloslavskiy
2019-11-08 3:04 ` Junio C Hamano
2019-11-04 19:26 ` [PATCH 3/5] reset: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-11-05 15:03 ` Phillip Wood
2019-11-05 19:22 ` Phillip Wood
2019-11-05 19:36 ` Alexandr Miloslavskiy
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-11-05 16:14 ` Phillip Wood
2019-11-05 19:37 ` Alexandr Miloslavskiy
2019-11-06 4:40 ` Junio C Hamano
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-11-04 19:26 ` [PATCH 4/5] doc: commit: unify <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-06 4:50 ` Junio C Hamano
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-11-07 5:54 ` Junio C Hamano
2019-11-07 11:39 ` Alexandr Miloslavskiy
2019-11-04 19:26 ` [PATCH 5/5] commit: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-11-05 16:27 ` Phillip Wood
2019-11-05 19:42 ` Alexandr Miloslavskiy
2019-11-06 15:56 ` Alexandr Miloslavskiy
2019-12-10 10:42 ` Phillip Wood
2019-12-11 11:43 ` Alexandr Miloslavskiy
2019-12-11 14:27 ` Phillip Wood [this message]
2019-12-11 15:06 ` Alexandr Miloslavskiy
2019-12-11 16:14 ` Junio C Hamano
2019-12-11 16:20 ` Alexandr Miloslavskiy
2019-12-12 14:56 ` Alexandr Miloslavskiy
2019-11-06 4:51 ` Junio C Hamano
2019-11-06 15:51 ` [PATCH v2 0/6] Add --pathspec-from-file option for reset, commit Alexandr Miloslavskiy via GitGitGadget
2019-11-06 15:51 ` [PATCH v2 1/6] parse-options.h: add new options `--pathspec-from-file`, `--pathspec-file-nul` Alexandr Miloslavskiy via GitGitGadget
2019-11-06 15:51 ` [PATCH v2 2/6] pathspec: add new function to parse file Alexandr Miloslavskiy via GitGitGadget
2019-11-19 5:59 ` Junio C Hamano
2019-11-19 16:50 ` Alexandr Miloslavskiy
2019-11-06 15:51 ` [PATCH v2 3/6] doc: reset: unify <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-19 6:05 ` Junio C Hamano
2019-11-19 16:52 ` Alexandr Miloslavskiy
2019-11-06 15:51 ` [PATCH v2 4/6] reset: support the `--pathspec-from-file` option Alexandr Miloslavskiy via GitGitGadget
2019-11-06 15:51 ` [PATCH v2 5/6] doc: commit: unify <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-19 6:16 ` Junio C Hamano
2019-11-19 16:53 ` Alexandr Miloslavskiy
2019-11-19 17:02 ` Alexandr Miloslavskiy
2019-11-06 15:51 ` [PATCH v2 6/6] commit: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-11-19 6:10 ` Junio C Hamano
2019-11-19 16:56 ` Alexandr Miloslavskiy
2019-11-19 16:48 ` [PATCH v3 0/6] Add --pathspec-from-file option for reset, commit Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 1/6] parse-options.h: add new options `--pathspec-from-file`, `--pathspec-file-nul` Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 2/6] pathspec: add new function to parse file Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 3/6] doc: reset: synchronize <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 4/6] reset: support the `--pathspec-from-file` option Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 5/6] doc: commit: synchronize <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-11-19 16:48 ` [PATCH v3 6/6] commit: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-11-20 4:04 ` [PATCH v3 0/6] Add --pathspec-from-file option for reset, commit Junio C Hamano
2019-11-20 9:22 ` Alexandr Miloslavskiy
2019-12-03 14:02 ` [PATCH v4 00/13] Add --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 01/13] parse-options.h: add new options `--pathspec-from-file`, `--pathspec-file-nul` Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 02/13] pathspec: add new function to parse file Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 03/13] doc: reset: synchronize <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 04/13] reset: support the `--pathspec-from-file` option Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 05/13] doc: commit: synchronize <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 06/13] commit: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 07/13] cmd_add: prepare for next patch Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 08/13] add: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 09/13] doc: checkout: remove duplicate synopsis Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 10/13] doc: checkout: fix broken text reference Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 11/13] doc: checkout: synchronize <pathspec> description Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 12/13] doc: restore: " Alexandr Miloslavskiy via GitGitGadget
2019-12-03 14:02 ` [PATCH v4 13/13] checkout, restore: support the --pathspec-from-file option Alexandr Miloslavskiy via GitGitGadget
2019-12-03 16:55 ` [PATCH v4 00/13] Add " Junio C Hamano
2019-12-03 17:06 ` Alexandr Miloslavskiy
2019-12-04 19:25 ` Junio C Hamano
2019-12-05 10:43 ` Alexandr Miloslavskiy
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