sbc100 added a comment.

In D148835#4288151 <https://reviews.llvm.org/D148835#4288151>, @erichkeane 
wrote:

> In D148835#4288148 <https://reviews.llvm.org/D148835#4288148>, @cjdb wrote:
>
>> In D148835#4286924 <https://reviews.llvm.org/D148835#4286924>, 
>> @aaron.ballman wrote:
>>
>>> In D148835#4286905 <https://reviews.llvm.org/D148835#4286905>, @erichkeane 
>>> wrote:
>>>
>>>> In D148835#4284871 <https://reviews.llvm.org/D148835#4284871>, @cjdb wrote:
>>>>
>>>>> I've had some very good input about why this probably shouldn't go ahead: 
>>>>> git history erasure :')
>>>>
>>>> While that is a common criticism, if we're going to do this at all, we 
>>>> should do it in a single patch, as we can use --ignore-rev: 
>>>> https://akrabat.com/ignoring-revisions-with-git-blame/
>>>>
>>>> This is a pretty common thing to do, and I don't think it should prevent 
>>>> us from doing this, which I think is the 'greater good' here.  The 
>>>> alternative is to continue having a bunch of unrelated patches piece-meal 
>>>> 'erase' git history as people accidentally fix these.
>>>
>>> We already ignore blame revisions like this today: 
>>> https://github.com/llvm/llvm-project/blob/main/.git-blame-ignore-revs
>>
>> Oh cool, I had no idea this was possible :)
>>
>>> However, I'd ask that we hold off on this change unless we have some 
>>> tooling in place that rejects new additions of trailing whitespace, 
>>> otherwise we're going to end up in this exact same situation again in 
>>> another week or two. When CI starts failing on patches that insert *new* 
>>> trailing whitespace, then I'm all for this change because we can fix it 
>>> once and hopefully keep it fixed.
>>
>> Since Clang doesn't have pre-commit CI, how can we meaningfully progress 
>> here?
>
> Phab at least has Pre-commit CI, i would expect that to be sufficient? It 
> would at least cut down accidential whitespace by orders of magnitude.

Yes, isn't this already covered by the existing use of `clang-format` on upload 
to phabricator (`arc diff`) ?    At least for me it always gives me warnings if 
I try to upload anything that doesn't match clang-format.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
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https://reviews.llvm.org/D148835

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