Re: [RFC PATCH] docs-rst: move the rules for svg and graphviz to Makefile.sphinx

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On Mon, Nov 21, 2016 at 07:48:50AM -0200, Mauro Carvalho Chehab wrote:
> Not only media documents may have images. So, move the
> rules for building images from graphviz and from SVG to
> the Documentation makefile.
> 
> With this change, if some Documentation subdir "foo"
> can now specify that he has SVG and/or DOT source images
> that are included inside the documentation.
> 
> All it is needed is to create a Documentation/foo/Makefile with:
> 
> 	DOTS += foo/bar.dot
> 	IMAGES += foo/foobar.svg
> 
> and, at Makefile.sphinx, add a:
> 
> 	include foo/Makefile
> 
> The build system will generate the SVG image "bar.svg" from
> the graphviz "bar.dot" document for all documentation targets.
> 
> If the documentation target is latexdocs or pdfdocs, it will
> also produce a "bar.pdf" image from "bar.svg", and a "foobar.pdf"
> from a SVG source image called "foobar.svg".
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>

Is there a branch somewhere with all this? I'd like to play around with
pulling graphs into the gpu docs ...
-Daniel

> ---
> 
> NOTE:
> ====
> 
> This is a RFC patch, based on this patch series:
> 	https://lkml.org/lkml/2016/11/20/89
> 
> If you think it is worth, I'll write a documentation patch for the doc-guide/
> providing a complete guide about how to add an image at the Kernel's
> documentation.
> 
> 
>  Documentation/Makefile.sphinx | 41 ++++++++++++++++-----
>  Documentation/media/Makefile  | 83 ++++++++++++++++---------------------------
>  2 files changed, 63 insertions(+), 61 deletions(-)
> 
> diff --git a/Documentation/Makefile.sphinx b/Documentation/Makefile.sphinx
> index 707c65337ebf..adc24ffa4c6a 100644
> --- a/Documentation/Makefile.sphinx
> +++ b/Documentation/Makefile.sphinx
> @@ -2,6 +2,8 @@
>  # Makefile for Sphinx documentation
>  #
>  
> +include Documentation/media/Makefile
> +
>  # You can set these variables from the command line.
>  SPHINXBUILD   = sphinx-build
>  SPHINXOPTS    =
> @@ -13,6 +15,29 @@ BUILDDIR      = $(obj)/output
>  PDFLATEX      = xelatex
>  LATEXOPTS     = -interaction=batchmode
>  
> +# Handle SVG and graphviz images
> +
> +DOTTGT := $(patsubst %.dot,%.svg,$(DOTS))
> +IMGDOT := $(patsubst %,$(srctree)/Documentation/%,$(DOTTGT))
> +
> +IMGTGT := $(patsubst %.svg,%.pdf,$(IMAGES))
> +IMGPDF := $(patsubst %,$(srctree)/Documentation/%,$(IMGTGT))
> +
> +cmd = $(echo-cmd) $(cmd_$(1))
> +
> +quiet_cmd_genpdf = GENPDF  $2
> +      cmd_genpdf = convert $2 $3
> +
> +quiet_cmd_gendot = DOT     $2
> +      cmd_gendot = dot -Tsvg $2 > $3
> +
> +%.pdf: %.svg
> +	@$(call cmd,genpdf,$<,$@)
> +
> +%.svg: %.dot
> +	@$(call cmd,gendot,$<,$@)
> +
> +
>  # User-friendly check for sphinx-build
>  HAVE_SPHINX := $(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi)
>  
> @@ -54,7 +79,7 @@ loop_cmd = $(echo-cmd) $(cmd_$(1))
>  #    e.g. "media" for the linux-tv book-set at ./Documentation/media
>  
>  quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
> -      cmd_sphinx = $(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media $2;\
> +      cmd_sphinx = $(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media mediaheaders;\
>  	BUILDDIR=$(abspath $(BUILDDIR)) SPHINX_CONF=$(abspath $(srctree)/$(src)/$5/$(SPHINX_CONF)) \
>  	$(SPHINXBUILD) \
>  	-b $2 \
> @@ -65,10 +90,10 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
>  	$(abspath $(srctree)/$(src)/$5) \
>  	$(abspath $(BUILDDIR)/$3/$4);
>  
> -htmldocs:
> +htmldocs: $(IMGDOT)
>  	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
>  
> -latexdocs:
> +latexdocs: $(IMGPDF)
>  	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,latex,$(var),latex,$(var)))
>  
>  ifeq ($(HAVE_PDFLATEX),0)
> @@ -79,15 +104,15 @@ pdfdocs:
>  
>  else # HAVE_PDFLATEX
>  
> -pdfdocs: latexdocs
> +pdfdocs: latexdocs $(IMGPDF)
>  	$(foreach var,$(SPHINXDIRS), $(MAKE) PDFLATEX=$(PDFLATEX) LATEXOPTS="$(LATEXOPTS)" -C $(BUILDDIR)/$(var)/latex;)
>  
>  endif # HAVE_PDFLATEX
>  
> -epubdocs:
> +epubdocs: $(IMGDOT)
>  	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,epub,$(var),epub,$(var)))
>  
> -xmldocs:
> +xmldocs: $(IMGDOT)
>  	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,xml,$(var),xml,$(var)))
>  
>  # no-ops for the Sphinx toolchain
> @@ -97,8 +122,8 @@ mandocs:
>  installmandocs:
>  
>  cleandocs:
> -	$(Q)rm -rf $(BUILDDIR)
> -	$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) -C Documentation/media clean
> +	$(Q)rm -rf $(BUILDDIR) $(IMGDOT) $(IMGPDF)
> +	$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) -C Documentation/media mediacleandocs
>  
>  endif # HAVE_SPHINX
>  
> diff --git a/Documentation/media/Makefile b/Documentation/media/Makefile
> index 4d8e2ff378c4..b27c202beefb 100644
> --- a/Documentation/media/Makefile
> +++ b/Documentation/media/Makefile
> @@ -1,54 +1,35 @@
>  # Rules to convert DOT and SVG to Sphinx images
>  
> -SRC_DIR=$(srctree)/Documentation/media
> -
> -DOTS = \
> -	uapi/v4l/pipeline.dot \
> -
> -IMAGES = \
> -	typical_media_device.svg \
> -	uapi/dvb/dvbstb.svg \
> -	uapi/v4l/bayer.svg \
> -	uapi/v4l/constraints.svg \
> -	uapi/v4l/crop.svg \
> -	uapi/v4l/fieldseq_bt.svg \
> -	uapi/v4l/fieldseq_tb.svg \
> -	uapi/v4l/nv12mt.svg \
> -	uapi/v4l/nv12mt_example.svg \
> -	uapi/v4l/pipeline.svg \
> -	uapi/v4l/selection.svg \
> -	uapi/v4l/subdev-image-processing-full.svg \
> -	uapi/v4l/subdev-image-processing-scaling-multi-source.svg \
> -	uapi/v4l/subdev-image-processing-crop.svg \
> -	uapi/v4l/vbi_525.svg \
> -	uapi/v4l/vbi_625.svg \
> -	uapi/v4l/vbi_hsync.svg \
> -
> -DOTTGT := $(patsubst %.dot,%.svg,$(DOTS))
> -IMGDOT := $(patsubst %,$(SRC_DIR)/%,$(DOTTGT))
> -
> -IMGTGT := $(patsubst %.svg,%.pdf,$(IMAGES))
> -IMGPDF := $(patsubst %,$(SRC_DIR)/%,$(IMGTGT))
> -
> -cmd = $(echo-cmd) $(cmd_$(1))
> -
> -quiet_cmd_genpdf = GENPDF  $2
> -      cmd_genpdf = convert $2 $3
> -
> -quiet_cmd_gendot = DOT     $2
> -      cmd_gendot = dot -Tsvg $2 > $3
> -
> -%.pdf: %.svg
> -	@$(call cmd,genpdf,$<,$@)
> -
> -%.svg: %.dot
> -	@$(call cmd,gendot,$<,$@)
> +UAPI_V4L = media/uapi/v4l
> +
> +DOTS += \
> +	$(UAPI_V4L)/pipeline.dot \
> +
> +IMAGES += \
> +	media/typical_media_device.svg \
> +	media/uapi/dvb/dvbstb.svg \
> +	$(UAPI_V4L)/bayer.svg \
> +	$(UAPI_V4L)/constraints.svg \
> +	$(UAPI_V4L)/crop.svg \
> +	$(UAPI_V4L)/fieldseq_bt.svg \
> +	$(UAPI_V4L)/fieldseq_tb.svg \
> +	$(UAPI_V4L)/nv12mt.svg \
> +	$(UAPI_V4L)/nv12mt_example.svg \
> +	$(UAPI_V4L)/pipeline.svg \
> +	$(UAPI_V4L)/selection.svg \
> +	$(UAPI_V4L)/subdev-image-processing-full.svg \
> +	$(UAPI_V4L)/subdev-image-processing-scaling-multi-source.svg \
> +	$(UAPI_V4L)/subdev-image-processing-crop.svg \
> +	$(UAPI_V4L)/vbi_525.svg \
> +	$(UAPI_V4L)/vbi_625.svg \
> +	$(UAPI_V4L)/vbi_hsync.svg \
>  
>  # Rules to convert a .h file to inline RST documentation
>  
>  PARSER = $(srctree)/Documentation/sphinx/parse-headers.pl
> -UAPI = $(srctree)/include/uapi/linux
> -KAPI = $(srctree)/include/linux
> +SRC_DIR= $(srctree)/Documentation/media
> +UAPI   = $(srctree)/include/uapi/linux
> +KAPI   = $(srctree)/include/linux
>  
>  FILES = audio.h.rst ca.h.rst dmx.h.rst frontend.h.rst net.h.rst video.h.rst \
>  	  videodev2.h.rst media.h.rst cec.h.rst lirc.h.rst
> @@ -96,16 +77,12 @@ $(BUILDDIR)/lirc.h.rst: ${UAPI}/lirc.h ${PARSER} $(SRC_DIR)/lirc.h.rst.exception
>  
>  # Media build rules
>  
> -.PHONY: all html epub xml latex
> +.PHONY: mediaheaders
>  
> -all: $(IMGDOT) $(BUILDDIR) ${TARGETS}
> -html: all
> -epub: all
> -xml: all
> -latex: $(IMGPDF) all
> +mediaheaders: $(IMGDOT) $(BUILDDIR) ${TARGETS}
>  
> -clean:
> -	-rm -f $(DOTTGT) $(IMGTGT) ${TARGETS} 2>/dev/null
> +mediacleandocs:
> +	$(Q)rm -f ${TARGETS} 2>/dev/null
>  
>  $(BUILDDIR):
>  	$(Q)mkdir -p $@
> -- 
> 2.9.3
> 
> 
> --
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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