[llvm-dev] [RFC] Semi-Automatic clang-format of files with low frequency

[Sam Elliott via llvm-dev]

You can achieve the same as a `.clang-format-ignore` for vendored directories by putting a `.clang-format` in those directories which turns off formatting (IIRC, this takes two lines). What's more, this works with old versions of clang-format!

Sam

> On 1 Jul 2020, at 8:22 pm, MyDeveloper Day via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> We recently had a suggestion about introducing a .clang-format-ignore file, it seems there could be value in that for areas of which you don't want to ever format.
> 
> Anyone undertaking a global clang-format without prior knowledge of the specific area wouldn't necessarily know that.
> 
> MyDeveloperDay
> 
> On Wed, Jul 1, 2020 at 6:14 PM Michael Kruse <llvmdev at meinersbur.de <mailto:llvmdev at meinersbur.de>> wrote:
> Am Mi., 1. Juli 2020 um 05:46 Uhr schrieb MyDeveloper Day via llvm-dev
> <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>>:
> > I always knew "polly" was mostly clean too, and actually one of the areas I already test against, (along with lib/Format obviously).
> 
> You have no other choice.
> Polly verifies its source formatting as part of check-polly, so every
> commit that violates formatting will get an email from the buildbot.It
> also triggers when clang-format itself changes. Did you find those
> helpful?
> 
> The parts of Polly that are left out are its external dependencies,
> i.e. isl and imath. I wonder why these are even included in the
> clang-format status, we certainly do not want to modify these source
> files.
> 
> For clang, I have to exclude the test folder because clang-format
> messes with clang -verify tests that require comments on specific
> lines and tests that check correct behavior of clang on whitespace.
> 
> 
> Michael
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--
Sam Elliott
Software Team Lead
Senior Software Developer - LLVM and OpenTitan
lowRISC CIC

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