[llvm-dev] Creating my own “clang-format” style that can be used across multiple projects with the “BasedOnStyle” setting

Tue Dec 29 14:50:07 PST 2020

There was a change

https://reviews.llvm.org/rG10b1a87ba35d386b718f0e83c1d750631705b220

which got reverted by the author, I'm not sure if they plan to bring it
back? which could potentially help you.

https://reviews.llvm.org/rGc5c487f0d4c6720f4384f670490086e723f5fe32

MyDeveloperDay

On Tue, Dec 29, 2020 at 10:18 PM Timothy Wrona <tjwrona1992 at gmail.com>
wrote:

> Thanks Nathan, I believe that would suit my needs pretty well!
>
> It still feels a bit rigid if it just expects files to be in specific
> directories (C++ project structures tend to vary wildly haha). I would
> ultimately like to be able to specify a relative path in my CMakeLists file
> to tell it where to look for a .clang-format or .clang-tidy file. But
> either way I think I can achieve what I need with the proposed enhancement.
> :)
>
> Thanks,
> Tim
>
> On Tue, Dec 29, 2020 at 2:31 PM Nathan James <n.james93 at hotmail.co.uk>
> wrote:
>
>> Hi Timothy,
>>
>> There is a patch in flight - https://reviews.llvm.org/D93844.
>> It doesn't specifically address this problem, but it it lands, you
>> could adapt it to work for your needs.
>> You could have a `.clang-format` file in the common subdirectory of all
>> your projects, then any `.clang-format` file in the individual
>> projects, could Base themselves off that root style.
>>
>> Maybe this is merit for clang-format BasedOnStyle to also accept a path
>> to another `.clang-format` file. Likely this could either be absolute
>> or relative to either the `.clang-format` file or if the style was read
>> from the command line, relative to the CWD.
>>
>> Before moving forward a strict set of semantics need establishing with
>> how these features interop with each other.
>> We would also need to ensure people don't try stupid things like
>> BasedOnStyle referring to the same file, or 2 files BasedOnStyle
>> pointing to each other. Both would likely result in an infinite loop
>> and so instead should report an error to the user.
>>
>> ~Nathan James
>>
>> On Mon, 2020-12-28 at 18:18 -0800, David Blaikie via llvm-dev wrote:
>> > +MyDeveloper Day  who seems to be contributing to/reviewing clang-
>> > format patches these days
>> >
>> > Sounds like a nice to have feature - you can file feature requests in
>> > the LLVM bugzilla (bugs.llvm.org). (perhaps it's already possible,
>> > but I don't know enough about clang-format to say)
>> >
>> > On Sun, Dec 20, 2020 at 4:29 PM Timothy Wrona via llvm-dev <
>> > llvm-dev at lists.llvm.org> wrote:
>> > > Hi,
>> > >
>> > > This is my first time reaching out to the llvm mailing list so I
>> > > apologize if this is not the correct place to ask a question like
>> > > this. (If it isn't please let me know where I should post this
>> > > question.)
>> > >
>> > > I have multiple projects that I want to share a similar clang-
>> > > format style, but I also want to be able to make minor tweaks
>> > > between each project so they can be slightly different from one
>> > > another if needed. Currently each project just has the same .clang-
>> > > format file copied and pasted into its own repository, but it feels
>> > > wrong because all of the style options are just duplicated from
>> > > project to project and if I need to change one option I need to go
>> > > across all projects and manually change it in all of them.
>> > >
>> > > I would like to create my own style that can be used with the
>> > > "BasedOnStyle" option. That way I can specify that I want all of
>> > > these projects to be based on the same custom style that would be
>> > > kept in a shared location, and then I could easily override any
>> > > project specific options on a per-project basis.
>> > >
>> > > I looked through the documentation and as far as I can tell, there
>> > > doesn't appear to be any way to create your own style and save it
>> > > so other projects can be based on the same style. I feel like this
>> > > is something a lot of users would need (for example if a company
>> > > wanted to define their own master style that all projects should
>> > > follow).
>> > >
>> > > Is there any way to do this? And if not, how could I go about
>> > > requesting such a feature be added?
>> > >
>> > > Thanks,
>> > >
>> > > Tim
>> > >
>> > > _______________________________________________
>> > > LLVM Developers mailing list
>> > > llvm-dev at lists.llvm.org
>> > > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>> >
>> > _______________________________________________
>> > LLVM Developers mailing list
>> > llvm-dev at lists.llvm.org
>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
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