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Re: [PATCH 02/11] http-backend.c: replace `git_config()` with `git_config_get_bool()` family

From
Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Date
Aug 6, 2014, 15:44 UTC
Message-ID
<vpqfvh9tygl.fsf@anie.imag.fr>
In-Reply-To
<53E24750.4000602@gmail.com>
Tanay Abhra <tanayabh@gmail.com> writes:
Show 33 quoted lines
> On 8/5/2014 12:29 AM, Eric Sunshine wrote:
>> On Mon, Aug 4, 2014 at 2:33 PM, Tanay Abhra <tanayabh@gmail.com> wrote:
>>> -       if (skip_prefix(var, "http.", &p)) {
>>> -               int i;
>>> -
>>> -               for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
>>> -                       struct rpc_service *svc = &rpc_service[i];
>>> -                       if (!strcmp(p, svc->config_name)) {
>>> -                               svc->enabled = git_config_bool(var, value);
>>> -                               return 0;
>>> -                       }
>>> -               }
>>> +       for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
>>> +               struct rpc_service *svc = &rpc_service[i];
>>> +               strbuf_addf(&var, "http.%s", svc->config_name);
>>> +               if (!git_config_get_bool(var.buf, &value))
>>> +                       svc->enabled = value;
>>> +               strbuf_reset(&var);
>>>         }
>> 
>> There is a behavior change here. The original code set svc->enabled to
>> the first matching rpc_service[] entry, whereas the new code sets it
>> to the last matching entry. Is this change intentional?
>>
>
> I was preparing the reroll and I saw that I had missed your mail.
> I think that I haven't changed the behaviour, the original one is
> written in callback form so it has to go through the array every time for each
> new value.
> When there are multiple entries for a service say,
>
> http.receivepack = 1
> http.receivepack = 0
I first got convinced by Eric, but I now think you're right.

Eric's point was (I think) not about multiple entries for the same variable, but about multiple entries for different services, like

http.receivepack = 1 http.uploadpack = 0

The order of assignments to svn->enabled change, but it doesn't matter because svc is just a local variable pointing to the right element of rpc_service[i]. So in both cases, you'll assign

rpc_service[<index of service>].enabled = <last occurence of variable http.<service> >
even though the order of assignments will change.
Eric, am I interpreting right?
-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/
Previous: Tanay AbhraNext: Eric Sunshine
Message 7 of 20 in “git_config callers rewritten with the new config-set API”
  1. 00/11 git_config callers rewritten with the new config-set APITanay Abhra, Aug 4, 2014
  2. 01/11 daemon.c: replace `git_config()` with `git_config_get_bool()` familyTanay Abhra, Aug 4, 2014
  3. Matthieu MoyAug 4, 2014
  4. 02/11 http-backend.c: replace `git_config()` with `git_config_get_bool()` familyTanay Abhra, Aug 4, 2014
  5. Eric SunshineAug 4, 2014
  6. Tanay AbhraAug 6, 2014
  7. Matthieu MoyAug 6, 2014
  8. Eric SunshineAug 6, 2014
  9. 03/11 read-cache.c: replace `git_config()` with `git_config_get_*()` familyTanay Abhra, Aug 4, 2014
  10. 04/11 archive.c: replace `git_config()` with `git_config_get_bool()` familyTanay Abhra, Aug 4, 2014
  11. 05/11 fetchpack.c: replace `git_config()` with `git_config_get_*()` familyTanay Abhra, Aug 4, 2014
  12. 06/11 rerere.c: replace `git_config()` with `git_config_get_*()` familyTanay Abhra, Aug 4, 2014
  13. 07/11 builtin/gc.c: replace `git_config()` with `git_config_get_*()` familyTanay Abhra, Aug 4, 2014
  14. Matthieu MoyAug 4, 2014
  15. 08/11 pager.c: replace `git_config()` with `git_config_get_value()`Tanay Abhra, Aug 4, 2014
  16. Matthieu MoyAug 4, 2014
  17. 09/11 imap-send.c: replace `git_config()` with `git_config_get_*()` familyTanay Abhra, Aug 4, 2014
  18. 10/11 alias.c: replace `git_config()` with `git_config_get_string()`Tanay Abhra, Aug 4, 2014
  19. 11/11 branch.c: replace `git_config()` with `git_config_get_string()Tanay Abhra, Aug 4, 2014
  20. Matthieu MoyAug 4, 2014

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