From: Patrick Steinhardt <ps@pks.im>
To: Taylor Blau <me@ttaylorr.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
Kyle Lippincott <spectral@google.com>,
Eric Sunshine <sunshine@sunshineco.com>
Subject: Re: [PATCH v2 06/21] builtin/config: check for writeability after source is set up
Date: Wed, 15 May 2024 07:58:46 +0200 [thread overview]
Message-ID: <ZkRPFv4xSr26QkWa@tanuki> (raw)
In-Reply-To: <ZkPbZGPq6xFrhngN@nand.local>
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On Tue, May 14, 2024 at 05:45:08PM -0400, Taylor Blau wrote:
> On Mon, May 13, 2024 at 12:22:28PM +0200, Patrick Steinhardt wrote:
> > diff --git a/builtin/config.c b/builtin/config.c
> > index 0842e4f198..9866d1a055 100644
> > --- a/builtin/config.c
> > +++ b/builtin/config.c
> > @@ -843,7 +843,6 @@ static int cmd_config_set(int argc, const char **argv, const char *prefix)
> >
> > argc = parse_options(argc, argv, prefix, opts, builtin_config_set_usage,
> > PARSE_OPT_STOP_AT_NON_OPTION);
> > - check_write();
> > check_argc(argc, 2, 2);
> >
> > if ((flags & CONFIG_FLAGS_FIXED_VALUE) && !value_pattern)
> > @@ -856,6 +855,7 @@ static int cmd_config_set(int argc, const char **argv, const char *prefix)
> > comment = git_config_prepare_comment_string(comment_arg);
> >
> > handle_config_location(prefix);
> > + check_write();
> >
> > value = normalize_value(argv[0], argv[1], &default_kvi);
>
> Nice catch.
>
> I thought about suggesting that check_write() could be inlined into
> handle_config_location(). But that is not a good idea, since we only
> care about calling check_write() when we are actually going to write
> something.
>
> In the spots outside of cmd_config_actions() where we explicitly call
> check_write(), we do so because we know we're about to write something
> (e.g., from cmd_config_set(), cmd_config_unset(), etc.).
>
> But in the classic mode we only want to call check_write() when the
> action selected tells us that we're going to write something.
Yeah, I was also wondering whether we want to refactor this, e.g. by
passing in an additional parameter to `handle_config_location()` that
tells it whether we want to read or write. But as you noted, this would
be trivial for the new subcommand modes, but harder for the acton mode.
So I refrained from doing that.
> I do wonder if we could set some "initialized" bit on the
> given_config_source variable so that it is a BUG() to call check_write()
> before it is set.
We could do that, but with the subsequent patch I think it's not as
important anymore. The main problem here is that it was not obvious at
all that `check_write()` and `handle_config_location()` have anything to
do with each other because they both accessed global state. With the
next patch we make that dependency explicit by accepting it as a param,
and with that it becomes clearer that `check_write()` depends on a
properly initialized variable.
Does that work for you?
Patrick
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next prev parent reply other threads:[~2024-05-15 7:19 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 11:24 [PATCH 00/21] builtin/config: remove global state Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 01/21] builtin/config: stop printing full usage on misuse Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 02/21] builtin/config: move legacy mode into its own function Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 03/21] builtin/config: move subcommand options into `cmd_config()` Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 04/21] builtin/config: move legacy " Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 05/21] builtin/config: move actions into `cmd_config_actions()` Patrick Steinhardt
2024-05-10 20:42 ` Kyle Lippincott
2024-05-13 10:20 ` Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 06/21] builtin/config: check for writeability after source is set up Patrick Steinhardt
2024-05-10 20:46 ` Kyle Lippincott
2024-05-13 10:21 ` Patrick Steinhardt
2024-05-10 11:24 ` [PATCH 07/21] config: make the config source const Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 08/21] builtin/config: refactor functions to have common exit paths Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 09/21] builtin/config: move location options into local variables Patrick Steinhardt
2024-05-10 11:34 ` Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 10/21] builtin/config: move display " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 11/21] builtin/config: move type options into display options Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 12/21] builtin/config: move default value " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 13/21] builtin/config: move `respect_includes_opt` into location options Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 14/21] builtin/config: convert `do_not_match` to a local variable Patrick Steinhardt
2024-05-11 16:42 ` Eric Sunshine
2024-05-10 11:25 ` [PATCH 15/21] builtin/config: convert `value_pattern` " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 16/21] builtin/config: convert `regexp` " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 17/21] builtin/config: convert `key_regexp` " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 18/21] builtin/config: convert `key` " Patrick Steinhardt
2024-05-10 11:25 ` [PATCH 19/21] builtin/config: track "fixed value" option via flags only Patrick Steinhardt
2024-05-11 16:52 ` Eric Sunshine
2024-05-10 11:26 ` [PATCH 20/21] builtin/config: convert flags to a local variable Patrick Steinhardt
2024-05-10 11:26 ` [PATCH 21/21] builtin/config: pass data between callbacks via local variables Patrick Steinhardt
2024-05-10 17:40 ` [PATCH 00/21] builtin/config: remove global state Junio C Hamano
2024-05-10 23:08 ` Kyle Lippincott
2024-05-13 10:21 ` [PATCH v2 " Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 01/21] builtin/config: stop printing full usage on misuse Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 02/21] builtin/config: move legacy mode into its own function Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 03/21] builtin/config: move subcommand options into `cmd_config()` Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 04/21] builtin/config: move legacy " Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 05/21] builtin/config: move actions into `cmd_config_actions()` Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 06/21] builtin/config: check for writeability after source is set up Patrick Steinhardt
2024-05-14 21:45 ` Taylor Blau
2024-05-15 5:58 ` Patrick Steinhardt [this message]
2024-05-13 10:22 ` [PATCH v2 07/21] config: make the config source const Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 08/21] builtin/config: refactor functions to have common exit paths Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 09/21] builtin/config: move location options into local variables Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 10/21] builtin/config: move display " Patrick Steinhardt
2024-05-13 10:22 ` [PATCH v2 11/21] builtin/config: move type options into display options Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 12/21] builtin/config: move default value " Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 13/21] builtin/config: move `respect_includes_opt` into location options Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 14/21] builtin/config: convert `do_not_match` to a local variable Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 15/21] builtin/config: convert `value_pattern` " Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 16/21] builtin/config: convert `regexp` " Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 17/21] builtin/config: convert `key_regexp` " Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 18/21] builtin/config: convert `key` " Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 19/21] builtin/config: track "fixed value" option via flags only Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 20/21] builtin/config: convert flags to a local variable Patrick Steinhardt
2024-05-13 10:23 ` [PATCH v2 21/21] builtin/config: pass data between callbacks via local variables Patrick Steinhardt
2024-05-13 21:57 ` [PATCH v2 00/21] builtin/config: remove global state Kyle Lippincott
2024-05-14 14:48 ` Junio C Hamano
2024-05-14 14:52 ` Patrick Steinhardt
2024-05-15 5:53 ` Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 " Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 01/21] builtin/config: stop printing full usage on misuse Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 02/21] builtin/config: move legacy mode into its own function Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 03/21] builtin/config: move subcommand options into `cmd_config()` Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 04/21] builtin/config: move legacy " Patrick Steinhardt
2024-05-15 6:41 ` [PATCH v3 05/21] builtin/config: move actions into `cmd_config_actions()` Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 06/21] builtin/config: check for writeability after source is set up Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 07/21] config: make the config source const Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 08/21] builtin/config: refactor functions to have common exit paths Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 09/21] builtin/config: move location options into local variables Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 10/21] builtin/config: move display " Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 11/21] builtin/config: move type options into display options Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 12/21] builtin/config: move default value " Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 13/21] builtin/config: move `respect_includes_opt` into location options Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 14/21] builtin/config: convert `do_not_match` to a local variable Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 15/21] builtin/config: convert `value_pattern` " Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 16/21] builtin/config: convert `regexp` " Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 17/21] builtin/config: convert `key_regexp` " Patrick Steinhardt
2024-05-15 6:42 ` [PATCH v3 18/21] builtin/config: convert `key` " Patrick Steinhardt
2024-05-15 6:43 ` [PATCH v3 19/21] builtin/config: track "fixed value" option via flags only Patrick Steinhardt
2024-05-15 6:43 ` [PATCH v3 20/21] builtin/config: convert flags to a local variable Patrick Steinhardt
2024-05-15 6:43 ` [PATCH v3 21/21] builtin/config: pass data between callbacks via local variables Patrick Steinhardt
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