Re: [Patch] pg_rewind: options to use restore_command from recovery.conf or command line

From: Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
To: Alexey Kondratov <a(dot)kondratov(at)postgrespro(dot)ru>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, vladimirlesk(at)yandex-team(dot)ru, dsarafan(at)yandex-team(dot)ru
Subject: Re: [Patch] pg_rewind: options to use restore_command from recovery.conf or command line
Date: 2019-03-06 15:38:12
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> 20 февр. 2019 г., в 17:06, Alexey Kondratov <a(dot)kondratov(at)postgrespro(dot)ru> написал(а):
>> I will work out this one with postgres -C and come back till the next commitfest. I found that something similar is already used in pg_ctl and there is a mechanism for finding valid executables in exec.c. So it does not seem to be a big deal at the first sight.
> I have reworked the patch, please find new version attached. It is 3 times as smaller than the previous one and now touches pg_rewind's code only. Tests are also slightly refactored in order to remove duplicated code. Execution of postgres -C is used for restore_command retrieval (if -r is passed) as being suggested. Otherwise everything works as before.

> <v4-0001-pg_rewind-options-to-use-restore_command.patch>

The new patch is much smaller (less than 400 lines) and works as advertised.
There's a typo "retreive" there.

These lines look a little suspicious:
char postgres_exec_path[MAXPGPATH],
Is it supposed to be any difference between MAXPGPATH and MAX_RESTORE_COMMAND?

Besides this, patch looks fine to me.

Best regards, Andrey Borodin.

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