"Good PR" mechanical check

[Andrei Alexandrescu via Digitalmars-d]

Related to https://github.com/D-Programming-Language/dlang.org/pull/1191:

A friend who is in the GNU community told me a while ago they have a 
mechanical style checker that people can run against their proposed 
patches to make sure the patches have a style consistent with the one 
enforced by the GNU style. I forgot the name, something like 
"good-patch". I'll shoot him an email.

Similarly, I think it would help us to release a tool in the tools/ repo 
that analyzes a would-be Phobos pull request and ensures it's styled the 
same way as most of Phobos: braces on their own lines, whitespace 
inserted a specific way, no hard tabs, etc. etc. Then people can run the 
tool before even submitting a PR to make sure there's no problem of that 
kind.

Over the years I've developed some adaptability to style, and I can do 
Phobos' style no problem even though it wouldn't be my first preference 
(I favor Egyptian braces). But seeing a patchwork of styles within the 
same project, same file, and sometimes even the same pull request is 
quite jarring at least to me.

Who would like to embark on writing such a tool?


Thanks,

Andrei