[cfe-dev] python vs python3 shebang

[Valeriy Savchenko via cfe-dev]

As far as I remember, it’s trickier on Windows where there is a special hack for shebang to python specifically.

-Valeriy

> On 22 Apr 2021, at 12:29, Haojian Wu via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> 
> Hello folks,
> 
> We have a mixture of python(2) vs python3 shebang usage in llvm codebase.
> 
> As python2 upstream support has ended, what's the LLVM policy here? Shall we change the shebang to python3 for all scripts? 
> 
> - For llvm-developer-only python scripts (e.g. clang-tidy/add_new_check.py), it is safe to do this change, as LLVM development <https://llvm.org/docs/GettingStarted.html#software> requires python >= 3.6 
> - For python scripts being interacted with people's workflow (e.g. clang-format-diff.py), it seems unclear to me, changing the shebang would break people's workflow on python2 machines.
> 
> I have some patches (https://reviews.llvm.org/D101038 <https://reviews.llvm.org/D101038>, https://reviews.llvm.org/D101037 <https://reviews.llvm.org/D101037>). What do people think?
> 
> 
> Thanks,
> Haojian
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