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Re: svn generates long lists of empty diffs with --diff-cmd

From: Alexey Neyman <stilor_at_att.net>
Date: Thu, 20 Apr 2017 21:58:32 -0700

On 04/20/2017 06:52 AM, Bert Huijben wrote:
>> -----Original Message-----
>> From: Alexey Neyman [mailto:stilor_at_att.net]
>> Sent: donderdag 20 april 2017 02:59
>> To: users_at_subversion.apache.org
>> Subject: svn generates long lists of empty diffs with --diff-cmd
>>
>> Hi,
>>
>> I noticed that SVN generates a lot of spurious diffs when using a
>> --diff-cmd option that look like this:
>>
>> Index: arch/alpha/boot/tools/objstrip.c
>> ==========================================================
>> =========
>> Index: arch/alpha/boot/Makefile
>> ==========================================================
>> =========
>>
>> Is it possible to suppress such empty diffs? This makes the tools like
>> ReviewBoard (www.reviewboard.org) examine a lot of unchanged files and
>> slows them down considerably and unnecessary.
> What argument do you pass to --diff-cmd ?
svn diff --diff-cmd=diff
> Is it possible that the files are actually different, but your diff command reports that they are not different (e.g. after normalizing whitespace). I think this header is printed on changed files, right before invoking the diff command.
No, plain 'svn diff' does not show any differences, not even properties.
For example:

[aneyman_at_rhel-build2 src]$ svn diff $URL/SETUP.bash SETUP.bash
[aneyman_at_rhel-build2 src]$ svn diff --diff-cmd=diff $URL/SETUP.bash
SETUP.bash
Index: SETUP.bash
===================================================================

Alexey.
Received on 2017-04-21 06:58:47 CEST

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