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From: Derrick Stolee <stolee@gmail.com>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, peff@peff.net, jnareb@gmail.com,
	pclouds@gmail.com, carenas@gmail.com, avarab@gmail.com,
	Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH 2/5] repo-settings: add feature.manyCommits setting
Date: Wed, 24 Jul 2019 06:41:15 -0400	[thread overview]
Message-ID: <bd96b1f1-3369-e130-dbed-8634589cd8e3@gmail.com> (raw)
In-Reply-To: <nycvar.QRO.7.76.6.1907231544200.21907@tvgsbejvaqbjf.bet>

On 7/23/2019 10:53 AM, Johannes Schindelin wrote:
> Hi Stolee,
> 
> On Mon, 22 Jul 2019, Derrick Stolee via GitGitGadget wrote:
> 
>> From: Derrick Stolee <dstolee@microsoft.com>
>>
>> When a repo has many commits, it is helpful to write and read the
>> commit-graph file. Future changes to Git may include new config
>> settings that are benefitial in this scenario.
> 
> s/benefitial/beneficial/
> 
>>
>> Create the 'feature.manyCommits' config setting that changes the
>> default values of 'core.commitGraph' and 'gc.writeCommitGraph' to
>> true.
> 
> Great!
> 
>> diff --git a/repo-settings.c b/repo-settings.c
>> index 13a9128f62..f328602fd7 100644
>> --- a/repo-settings.c
>> +++ b/repo-settings.c
>> @@ -3,10 +3,17 @@
>>  #include "config.h"
>>  #include "repo-settings.h"
>>
>> +#define UPDATE_DEFAULT(s,v) do { if (s == -1) { s = v; } } while(0)
>> +
>>  static int git_repo_config(const char *key, const char *value, void *cb)
>>  {
>>  	struct repo_settings *rs = (struct repo_settings *)cb;
>>
>> +	if (!strcmp(key, "feature.manycommits")) {
>> +		UPDATE_DEFAULT(rs->core_commit_graph, 1);
>> +		UPDATE_DEFAULT(rs->gc_write_commit_graph, 1);
>> +		return 0;
>> +	}
>>  	if (!strcmp(key, "core.commitgraph")) {
>>  		rs->core_commit_graph = git_config_bool(key, value);
>>  		return 0;
> 
> Okay, this one is tricky. The behavior I would want is for
> `feature.manycommits` to override the _default_. And if I set
> `feature.manycommits = false` (e.g. via `git -c
> feature.manycommits=false ...`), I would want the default to "go back".
> 
> So I'd really rather see this as
> 
> 	if (!repo_config_get_bool(r, "feature.manycommits", &b) && b) {
> 		rs->core_commit_graph = 1;
> 		rs->gc_write_commit_graph = 1;
> 	}
> 
> 	[...]
> 
> 	repo_config_get_bool(r, "core.commitgraph", &rs->core_commit_graph);
> 
> I.e. override the default only if `feature.manyCommits` was true *in the
> end*.
> 
> In any case, we really need to make sure to handle the `= false` case
> correctly here. We might want to override the setting from the
> command-line, or it might be set in `~/.gitconfig` and need to be
> overridden in a local repository. We need to handle it.

I had forgotten about this interaction. Thanks for finding it!

The way I would fix it is to add an "int feature_many_commits" to
the repo_settings struct, then check its value at the very end of
prepare_repo_settings() and then UPDATE_DEFAULT() for the settings
we want.

Thanks!
-Stolee

  reply	other threads:[~2019-07-24 10:41 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-22 17:54 [PATCH 0/5] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-07-22 17:54 ` [PATCH 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-23 13:12   ` Johannes Schindelin
2019-07-22 17:54 ` [PATCH 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-23 14:53   ` Johannes Schindelin
2019-07-24 10:41     ` Derrick Stolee [this message]
2019-07-22 17:54 ` [PATCH 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-23 15:04   ` Johannes Schindelin
2019-07-24 19:27     ` Derrick Stolee
2019-07-22 17:54 ` [PATCH 4/5] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-07-22 17:54 ` [PATCH 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-07-23 15:20   ` Johannes Schindelin
2019-07-25  1:47     ` Derrick Stolee
2019-07-25  2:23 ` [PATCH v2 0/5] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-07-25  2:23   ` [PATCH v2 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-25  2:23   ` [PATCH v2 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-25  9:30     ` Johannes Schindelin
2019-07-25  2:23   ` [PATCH v2 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-25  9:36     ` Johannes Schindelin
2019-07-25  2:23   ` [PATCH v2 4/5] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-07-25  2:23   ` [PATCH v2 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-07-25  9:40   ` [PATCH v2 0/5] Create 'feature.*' config area and some centralized config parsing Johannes Schindelin
2019-07-30 19:35   ` [PATCH v3 " Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 1/5] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-07-30 20:47       ` Junio C Hamano
2019-07-30 19:35     ` [PATCH v3 2/5] repo-settings: add feature.manyCommits setting Derrick Stolee via GitGitGadget
2019-07-30 20:57       ` Junio C Hamano
2019-07-31 13:17         ` Johannes Schindelin
2019-07-31 15:48           ` Junio C Hamano
2019-07-31 15:01       ` Ævar Arnfjörð Bjarmason
2019-08-01 18:27         ` Derrick Stolee
2019-07-30 19:35     ` [PATCH v3 3/5] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 4/5] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-07-30 19:35     ` [PATCH v3 5/5] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-08-08 18:34       ` Elijah Newren
2019-08-08 18:48         ` Derrick Stolee
2019-08-08 18:59         ` Junio C Hamano
2019-08-08 19:12           ` Derrick Stolee
2019-08-08 20:31             ` Elijah Newren
2019-08-08 20:49               ` Derrick Stolee
2019-08-08 19:19           ` Elijah Newren
2019-08-08 20:07             ` Junio C Hamano
2019-08-08 20:46               ` Derrick Stolee
2019-08-13 18:37     ` [PATCH v4 0/6] Create 'feature.*' config area and some centralized config parsing Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 1/6] repo-settings: consolidate some config settings Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 2/6] t6501: use 'git gc' in quiet mode Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 3/6] commit-graph: turn on commit-graph by default Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 4/6] repo-settings: parse core.untrackedCache Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 5/6] repo-settings: create feature.manyFiles setting Derrick Stolee via GitGitGadget
2019-08-13 18:37       ` [PATCH v4 6/6] repo-settings: create feature.experimental setting Derrick Stolee via GitGitGadget
2019-08-13 21:04       ` [PATCH v4 0/6] Create 'feature.*' config area and some centralized config parsing Junio C Hamano
2019-08-13 21:08         ` Junio C Hamano
2019-08-14 10:32           ` Derrick Stolee
2019-08-14 10:38             ` Derrick Stolee

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