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From: Junio C Hamano <gitster@pobox.com>
To: Luke Diamand <luke@diamand.org>
Cc: Joachim Kuebart <joachim.kuebart@gmail.com>,
	Joachim Kuebart via GitGitGadget <gitgitgadget@gmail.com>,
	git@vger.kernel.org
Subject: Re: [PATCH] git-p4: speed up search for branch parent
Date: Thu, 29 Apr 2021 17:31:54 +0900	[thread overview]
Message-ID: <xmqqwnslfq4l.fsf@gitster.g> (raw)
In-Reply-To: <b0befcf3-8d8a-f99f-d4f0-78b2cfe22505@diamand.org> (Luke Diamand's message of "Thu, 29 Apr 2021 08:22:52 +0000")

Luke Diamand <luke@diamand.org> writes:

>>>>       def searchParent(self, parent, branch, target):
>>>> +        for tree in read_pipe_lines(["git", "rev-parse",
>>>> +                                     "{}^{{tree}}".format(target)]):
>>>> +            targetTree = tree.strip()
>>>
>>> It looks very strange to run a commit that you expect a single line
>>> of output, and read the result in a loop.  Doesn't git-p4.py supply
>>> a more suitable helper to read a single line output from a command?
>> You're absolutely right that this isn't very readable. I had a quick
>> look around for a function that reads a single-line response, but I'll
>> look again and come up with a clearer solution.
>
> I don't think there is one - git-p4 has lots of functions for calling
> `p4', but for calling git, it just uses Python's Popen() API.

OK.  It just felt "strange", not "wrong", so I am OK with the
construct at least for now.

> There are existing tests for importing branches which should cover
> this. I don't know if they need to be extended or not, you might want
> to check.
>
> Looks good otherwise.

Thanks for a prompt review.



  reply	other threads:[~2021-04-29  8:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-28 20:06 Joachim Kuebart via GitGitGadget
2021-04-29  2:22 ` Junio C Hamano
2021-04-29  7:48   ` Joachim Kuebart
2021-04-29  8:22     ` Luke Diamand
2021-04-29  8:31       ` Junio C Hamano [this message]
2021-04-29 19:31         ` Joachim Kuebart
2021-04-29 11:30       ` Joachim Kuebart
2021-05-05 11:56 ` [PATCH v2 0/2] " Joachim Kuebart via GitGitGadget
2021-05-05 11:56   ` [PATCH v2 1/2] git-p4: ensure complex branches are cloned correctly Joachim Kuebart via GitGitGadget
2021-05-05 11:56   ` [PATCH v2 2/2] git-p4: speed up search for branch parent Joachim Kuebart via GitGitGadget

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