[clang] [clang-format][CMake] Generate formatting options docs during build (PR #113739)

[Aiden Grossman via cfe-commits]

boomanaiden154 wrote:

> That and to also ensure that the edited Format.h doesn't break the python script.

Makes sense. #118154 would cover that too.

> If we are to leave the generated part of the rst file in the repo, https://github.com/llvm/llvm-project/pull/111513 would satisfy my requirements nicely. Something like https://github.com/llvm/llvm-project/pull/118154 may be a useful addition.

Can you explicate on what your requirements are here? I don't see why just wrapping the python script in CMake does anything tangible here. Having a build target that modifies the source directory is also weird and something that we should avoid if possible, in my opinion.

> That would be nice.

https://github.com/llvm/llvm-project/pull/118159

https://github.com/llvm/llvm-project/pull/113739