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@xxxxxxxxx>
> ---
> 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?
Patrick
