[PATCH v2 1/2] scripts/kernel-doc.py: don't create *.pyc files

[Jani Nikula]

On Wed, 16 Apr 2025, Mauro Carvalho Chehab <mchehab+huawei at kernel.org> wrote:
> As reported by Andy, kernel-doc.py is creating a __pycache__
> directory at build time.
>
> Disable creation of __pycache__ for the libraries used by
> kernel-doc.py, when excecuted via the build system or via
> scripts/find-unused-docs.sh.
>
> Reported-by: Andy Shevchenko <andriy.shevchenko at intel.com>
> Closes: https://lore.kernel.org/linux-doc/Z_zYXAJcTD-c3xTe@black.fi.intel.com/
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei at kernel.org>
> ---
>  drivers/gpu/drm/Makefile      | 2 +-
>  drivers/gpu/drm/i915/Makefile | 2 +-
>  include/drm/Makefile          | 2 +-
>  scripts/find-unused-docs.sh   | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index ed54a546bbe2..1469d64f8783 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -236,7 +236,7 @@ always-$(CONFIG_DRM_HEADER_TEST) += \
>  quiet_cmd_hdrtest = HDRTEST $(patsubst %.hdrtest,%.h,$@)
>        cmd_hdrtest = \
>  		$(CC) $(c_flags) -fsyntax-only -x c /dev/null -include $< -include $<; \
> -		$(srctree)/scripts/kernel-doc -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \
> +		$(KERNELDOC) PYTHONDONTWRITEBYTECODE=1 -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \

It doesn't work to put PYTHONDONTWRITEBYTECODE=1 as a parameter to
kernel-doc...

BR,
Jani.


>  		touch $@
>  
>  $(obj)/%.hdrtest: $(src)/%.h FORCE
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index ed05b131ed3a..bb873f9cc2aa 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -408,7 +408,7 @@ obj-$(CONFIG_DRM_I915_GVT_KVMGT) += kvmgt.o
>  #
>  # Enable locally for CONFIG_DRM_I915_WERROR=y. See also scripts/Makefile.build
>  ifdef CONFIG_DRM_I915_WERROR
> -    cmd_checkdoc = $(srctree)/scripts/kernel-doc -none -Werror $<
> +    cmd_checkdoc = $(KERNELDOC) PYTHONDONTWRITEBYTECODE=1 -none -Werror $<
>  endif
>  
>  # header test
> diff --git a/include/drm/Makefile b/include/drm/Makefile
> index a7bd15d2803e..6088ea458f44 100644
> --- a/include/drm/Makefile
> +++ b/include/drm/Makefile
> @@ -11,7 +11,7 @@ always-$(CONFIG_DRM_HEADER_TEST) += \
>  quiet_cmd_hdrtest = HDRTEST $(patsubst %.hdrtest,%.h,$@)
>        cmd_hdrtest = \
>  		$(CC) $(c_flags) -fsyntax-only -x c /dev/null -include $< -include $<; \
> -		$(srctree)/scripts/kernel-doc -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \
> +		$(KERNELDOC) PYTHONDONTWRITEBYTECODE=1 -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \
>  		touch $@
>  
>  $(obj)/%.hdrtest: $(src)/%.h FORCE
> diff --git a/scripts/find-unused-docs.sh b/scripts/find-unused-docs.sh
> index ee6a50e33aba..d6d397fbf917 100755
> --- a/scripts/find-unused-docs.sh
> +++ b/scripts/find-unused-docs.sh
> @@ -54,7 +54,7 @@ for file in `find $1 -name '*.c'`; do
>  	if [[ ${FILES_INCLUDED[$file]+_} ]]; then
>  	continue;
>  	fi
> -	str=$(scripts/kernel-doc -export "$file" 2>/dev/null)
> +	str=$(PYTHONDONTWRITEBYTECODE=1 scripts/kernel-doc -export "$file" 2>/dev/null)
>  	if [[ -n "$str" ]]; then
>  	echo "$file"
>  	fi

-- 
Jani Nikula, Intel