Re: [PATCH v2 3/3] meson: add rule to run 'git clang-format'

> On Mon, Jun 30, 2025 at 10:38:22AM +0200, Karthik Nayak wrote:
>> The Makefile has a 'style' rule to run 'git clang-format'. While Meson
>> intrinsically supports a 'clang-format' target, which can be run when
>> using the ninja backend by running 'ninja clang-format', this runs the
>> formatting on all existing files.
>>
>> Our Meson build doesn't yet support a way to run 'git clang-format',
>> which runs the formatter between the working directory and commit
>> provided. Add a new 'style' target to Meson to mimic the target in the
>> Makefile.
>
> Hm. Meson already knows to wire up clang-format automaically if it's
> available. But it indeed doesn't know to only format files that have
> been changed, so I guess this style makes sense regardless of that.
>

>> Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
>> ---
>>  meson.build | 12 ++++++++++++
>>  1 file changed, 12 insertions(+)
>>
>> diff --git a/meson.build b/meson.build
>> index 7fea4a34d6..20ce0525a1 100644
>> --- a/meson.build
>> +++ b/meson.build
>> @@ -2144,6 +2144,18 @@ if headers_to_check.length() != 0 and compiler.get_argument_syntax() == 'gcc'
>>    alias_target('check-headers', hdr_check)
>>  endif
>>
>> +git_clang_format = find_program('git-clang-format', required: false)
>> +if git_clang_format.found()
>> +  run_target('style',
>> +    command: [
>> +      'git', 'clang-format',
>> +      '--style', 'file',
>> +      '--diff',
>> +      '--extensions', 'c,h'
>> +    ]
>> +  )
>> +endif
>
> Do we want to call this target `clang-format-changed` though, so that it
> is consistent with the implicit `clang-format` target?
>