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From: Ben Peart <peartben@gmail.com>
To: Elijah Newren <newren@gmail.com>
Cc: Ben Peart <Ben.Peart@microsoft.com>,
	"git@vger.kernel.org" <git@vger.kernel.org>,
	"peff@peff.net" <peff@peff.net>,
	"gitster@pobox.com" <gitster@pobox.com>,
	"pclouds@gmail.com" <pclouds@gmail.com>,
	"vmiklos@frugalware.org" <vmiklos@frugalware.org>,
	Kevin Willford <kewillf@microsoft.com>,
	"Johannes.Schindelin@gmx.de" <Johannes.Schindelin@gmx.de>
Subject: Re: [PATCH v1 1/2] merge: Add merge.renames config setting
Date: Mon, 23 Apr 2018 09:22:42 -0400	[thread overview]
Message-ID: <1e57021a-2a99-c3a7-f203-e3c9b0546876@gmail.com> (raw)
In-Reply-To: <CABPp-BFqj2TFiHUDsysafq0NHC4MV-QYZVxOZe1TNRrXMOQfng@mail.gmail.com>



On 4/20/2018 2:34 PM, Elijah Newren wrote:
> Hi Ben,
> 
> On Fri, Apr 20, 2018 at 10:59 AM, Ben Peart <peartben@gmail.com> wrote:
>>
>> On 4/20/2018 1:02 PM, Elijah Newren wrote:
>>>
>>> On Fri, Apr 20, 2018 at 6:36 AM, Ben Peart <Ben.Peart@microsoft.com>
>>> wrote:
>>>>
>>>> --- a/Documentation/merge-config.txt
>>>> +++ b/Documentation/merge-config.txt
>>>> @@ -37,6 +37,11 @@ merge.renameLimit::
>>>>           during a merge; if not specified, defaults to the value of
>>>>           diff.renameLimit.
>>>>
>>>> +merge.renames::
>>>> +       Whether and how Git detects renames.  If set to "false",
>>>> +       rename detection is disabled. If set to "true", basic rename
>>>> +       detection is enabled. This is the default.
>>>
>>>
>>> One can already control o->detect_rename via the -Xno-renames and
>>> -Xfind-renames options.
> 
> This statement wasn't meant to be independent of the sentence that
> followed it...
> 
>> Yes, but that requires people to know they need to do that and then remember
>> to pass it on the command line every time.  We've found that doesn't
>> typically happen, we just get someone complaining about slow merges. :)
>>
>> That is why we added them as config options which change the default. That
>> way we can then set them on the repo and the default behavior gives them
>> better performance.  They can still always override the config setting with
>> the command line options.
> 
> Sorry, I think I wasn't being clear.  The documentation for the config
> options for e.g. diff.renameLimit, fetch.prune, log.abbrevCommit, and
> merge.ff all mention the equivalent command line parameters.  Your
> patch doesn't do that for merge.renames, but I think it would be
> helpful if it did.
> 
> Also, a link in the documentation the other way, from
> Documentation/merge-strategies.txt under the entries for -Xno-renames
> and -Xfind-renames should probably mention this new merge.renames
> config setting (much like the -Xno-renormalize flag mentions the
> merge.renomralize config option).
> 

I'm all in favor of having more information in the documentation.  I'm 
of the opinion that if someone has made the effort to actually _read_ 
the documentation, we should be as descriptive and complete as possible.

I'll take a cut at adding the things you have pointed out would be helpful.

> I agree that's the pre-existing behavior, but prior to this patch
> turning off rename detection could only be done manually with every
> invocation.  I'm slightly concerned that users might be confused if
> merge.renames was set to false somewhere -- perhaps even in a global
> /etc/gitconfig that they had no knowledge of or control over -- and in
> an attempt to get rename detection to work they started passing larger
> and larger values for renameLimit all to no avail.
> 
> The easy fix here may just be documenting the diff.renameLimit and
> merge.renameLimit options that they have no effect if rename detection
> is turned off.

I can add this additional documentation as well.  While some might think 
it is stating the obvious, I'm sure someone will benefit from it being 
explicitly called out.

> 
> Or maybe I'm just worrying too much, but we (folks at $dayjob) were
> bit pretty hard by renameLimit silently being capped at a value less
> than the user specified and in a way that wasn't documented anywhere.
> 

  parent reply	other threads:[~2018-04-23 13:22 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-20 13:36 [PATCH v1 0/2] add additional config settings for merge Ben Peart
2018-04-20 13:36 ` [PATCH v1 1/2] merge: Add merge.renames config setting Ben Peart
2018-04-20 17:02   ` Elijah Newren
2018-04-20 17:26     ` Elijah Newren
2018-04-23 12:57       ` Ben Peart
2018-04-20 17:59     ` Ben Peart
2018-04-20 18:34       ` Elijah Newren
2018-04-21  4:23         ` Junio C Hamano
2018-04-23 16:00           ` Ben Peart
2018-04-23 23:23             ` Junio C Hamano
2018-04-24 11:58               ` Johannes Schindelin
2018-04-24 17:47                 ` Elijah Newren
2018-04-25  8:20                   ` Johannes Schindelin
2018-04-22 12:07         ` Eckhard Maaß
2018-04-23 13:15           ` Ben Peart
2018-04-23 21:32             ` Eckhard Maaß
2018-04-24 16:53               ` Ben Peart
2018-04-23 13:22         ` Ben Peart [this message]
2018-04-20 13:36 ` [PATCH v1 2/2] merge: Add merge.aggressive " Ben Peart
2018-04-20 17:22   ` Elijah Newren
2018-04-24 16:45     ` Ben Peart
2018-04-24 17:36       ` Elijah Newren
2018-04-24 23:57       ` Junio C Hamano
2018-04-25 14:47         ` Ben Peart
2018-04-20 17:34 ` [PATCH v1 0/2] add additional config settings for merge Elijah Newren
2018-04-20 18:19   ` Ben Peart
2018-04-24 17:11 ` [PATCH v2 " Ben Peart
2018-04-24 17:11   ` [PATCH v2 1/2] merge: Add merge.renames config setting Ben Peart
2018-04-24 18:11     ` Elijah Newren
2018-04-24 18:59     ` Elijah Newren
2018-04-24 20:31       ` Ben Peart
2018-04-25 16:01         ` Elijah Newren
2018-04-24 17:11   ` [PATCH v2 2/2] merge: Add merge.aggressive " Ben Peart
2018-04-25  0:13   ` [PATCH v2 0/2] add additional config settings for merge Junio C Hamano
2018-04-25 15:22     ` Ben Peart
2018-04-26  1:48       ` Junio C Hamano
2018-04-26 20:52 ` [PATCH v3 0/3] add merge.renames config setting Ben Peart
2018-04-26 20:52   ` [PATCH v3 1/3] merge: update documentation for {merge,diff}.renameLimit Ben Peart
2018-04-26 23:11     ` Elijah Newren
2018-04-26 23:23       ` Jonathan Tan
2018-04-26 20:52   ` [PATCH v3 2/3] merge: Add merge.renames config setting Ben Peart
2018-04-26 22:52     ` Elijah Newren
2018-04-27  0:54       ` Ben Peart
2018-04-27  2:23         ` Junio C Hamano
2018-04-27  3:28           ` Elijah Newren
2018-04-27  7:23             ` Johannes Schindelin
2018-04-27 14:32               ` Elijah Newren
2018-04-27 18:37           ` Eckhard Maaß
2018-04-27 20:23             ` Elijah Newren
2018-04-30  8:03               ` Eckhard Maaß
2018-04-30 16:54                 ` Elijah Newren
2018-04-27  4:17         ` Elijah Newren
2018-04-27 18:19         ` Elijah Newren
2018-04-30 13:11           ` Ben Peart
2018-04-30 16:12             ` Re: Elijah Newren
2018-05-02 14:33               ` Re: Ben Peart
2018-04-26 20:52   ` [PATCH v3 3/3] merge: pass aggressive when rename detection is turned off Ben Peart
2018-04-26 23:00     ` Elijah Newren
2018-04-26 22:08   ` [PATCH v3 0/3] add merge.renames config setting Elijah Newren
2018-05-02 16:01 ` [PATCH v4 0/3] add additional config settings for merge Ben Peart
2018-05-02 16:01   ` [PATCH v4 1/3] merge: update documentation for {merge,diff}.renameLimit Ben Peart
2018-05-02 16:01   ` [PATCH v4 2/3] merge: Add merge.renames config setting Ben Peart
2018-05-04  3:07     ` Junio C Hamano
2018-05-02 16:01   ` [PATCH v4 3/3] merge: pass aggressive when rename detection is turned off Ben Peart
2018-05-02 17:20   ` [PATCH v4 0/3] add additional config settings for merge Elijah Newren

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