# -*- makefile -*-
# Makefile for Sphinx documentation
#

# You can set these variables from the command line.
SPHINXBUILD   = sphinx-build
SPHINXOPTS    =
PAPER         =
BUILDDIR      = $(obj)/output

# User-friendly check for sphinx-build
HAVE_SPHINX := $(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi)

ifeq ($(HAVE_SPHINX),0)

.DEFAULT:
	$(warning The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed and in PATH, or set the SPHINXBUILD make variable to point to the full path of the '$(SPHINXBUILD)' executable.)
	@echo "  SKIP    Sphinx $@ target."

else ifneq ($(DOCBOOKS),)

# Skip Sphinx build if the user explicitly requested DOCBOOKS.
.DEFAULT:
	@echo "  SKIP    Sphinx $@ target (DOCBOOKS specified)."

else # HAVE_SPHINX

# User-friendly check for rst2pdf
HAVE_RST2PDF := $(shell if python -c "import rst2pdf" >/dev/null 2>&1; then echo 1; else echo 0; fi)

# Internal variables.
PAPEROPT_a4     = -D latex_paper_size=a4
PAPEROPT_letter = -D latex_paper_size=letter
KERNELDOC       = $(srctree)/scripts/kernel-doc
KERNELDOC_CONF  = -D kerneldoc_srctree=$(srctree) -D kerneldoc_bin=$(KERNELDOC)
ALLSPHINXOPTS   = -D version=$(KERNELVERSION) -D release=$(KERNELRELEASE) -d $(BUILDDIR)/.doctrees $(KERNELDOC_CONF) $(PAPEROPT_$(PAPER)) -c $(srctree)/$(src) $(SPHINXOPTS) $(srctree)/$(src)
# the i18n builder cannot share the environment and doctrees with the others
I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .

quiet_cmd_sphinx = SPHINX  $@
      cmd_sphinx = BUILDDIR=$(BUILDDIR) $(SPHINXBUILD) -b $2 $(ALLSPHINXOPTS) $(BUILDDIR)/$2

htmldocs:
	$(MAKE) BUILDDIR=$(BUILDDIR) -f $(srctree)/Documentation/media/Makefile $@
	$(call cmd,sphinx,html)

pdfdocs:
ifeq ($(HAVE_RST2PDF),0)
	$(warning The Python 'rst2pdf' module was not found. Make sure you have the module installed to produce PDF output.)
	@echo "  SKIP    Sphinx $@ target."
else # HAVE_RST2PDF
	$(call cmd,sphinx,pdf)
endif # HAVE_RST2PDF

epubdocs:
	$(call cmd,sphinx,epub)

xmldocs:
	$(call cmd,sphinx,xml)

# no-ops for the Sphinx toolchain
sgmldocs:
psdocs:
mandocs:
installmandocs:

cleandocs:
	$(Q)rm -rf $(BUILDDIR)

endif # HAVE_SPHINX

dochelp:
	@echo  ' Linux kernel internal documentation in different formats (Sphinx):'
	@echo  '  htmldocs        - HTML'
	@echo  '  pdfdocs         - PDF'
	@echo  '  epubdocs        - EPUB'
	@echo  '  xmldocs         - XML'
	@echo  '  cleandocs       - clean all generated files'