docs: rename the GENDOC infrastructure

Rename the GENDOC infrastructure so that it more closely matches the way
we handle the packages infras.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Samuel Martin <s.martin49@gmail.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Reviewed-by: Samuel Martin <s.martin49@gmail.com>
Reviewed-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

1 files changed, 156 insertions, 0 deletions

diff --git a/package/doc-asciidoc.mk b/package/doc-asciidoc.mk
new file mode 100644
index 0000000000..fb9a62eb73
--- /dev/null
+++ b/package/doc-asciidoc.mk
@@ -0,0 +1,156 @@
+# we can't use suitable-host-package here because that's not available in
+# the context of 'make release'
+asciidoc-check-dependencies:
+	$(Q)if [ -z "$(shell support/dependencies/check-host-asciidoc.sh)" ]; then \
+		echo "You need a sufficiently recent asciidoc on your host" \
+			"to generate documents"; \
+		exit 1; \
+	fi
+	$(Q)if [ -z "`which w3m 2>/dev/null`" ]; then \
+		echo "You need w3m on your host to generate documents"; \
+		exit 1; \
+	fi
+
+asciidoc-check-dependencies-pdf:
+	$(Q)if [ -z "`which dblatex 2>/dev/null`" ]; then \
+		echo "You need dblatex on your host to generate PDF documents"; \
+		exit 1; \
+	fi
+
+# PDF generation is broken because of a bug in xsltproc program provided
+# by libxslt <=1.1.28, which does not honor an option we need to set.
+# Fortunately, this bug is already fixed upstream:
+#   https://gitorious.org/libxslt/libxslt/commit/5af7ad745323004984287e48b42712e7305de35c
+#
+# So, bail out when trying to build a PDF using a buggy version of the
+# xsltproc program.
+#
+# So, to overcome this issue and being able to build a PDF, you can
+# build xsltproc from its source repository, then run:
+#   $ PATH=/path/to/custom-xsltproc/bin:${PATH} make manual
+GENDOC_XSLTPROC_IS_BROKEN = \
+	$(shell xsltproc --maxvars 0 >/dev/null 2>/dev/null || echo y)
+
+################################################################################
+# ASCIIDOC_INNER -- generates the make targets needed to build a specific type of
+#                   asciidoc documentation.
+#
+#  argument 1 is the name of the document and the top-level asciidoc file must
+#             have the same name
+#  argument 2 is the uppercase name of the document
+#  argument 3 is the directory containing the document
+#  argument 4 is the type of document to generate (-f argument of a2x)
+#  argument 5 is the document type as used in the make target
+#  argument 6 is the output file extension for the document type
+#  argument 7 is the human text for the document type
+#  argument 8 (optional) are extra arguments for a2x
+#
+# The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
+#
+# Since this function will be called from within an $(eval ...)
+# all variable references except the arguments must be $$-quoted.
+################################################################################
+define ASCIIDOC_INNER
+$(1): $(1)-$(5)
+.PHONY: $(1)-$(5)
+$(1)-$(5): $$(O)/docs/$(1)/$(1).$(6)
+
+# Single line, because splitting a foreach is not easy...
+asciidoc-check-dependencies-$(5):
+$(1)-check-dependencies-$(5): asciidoc-check-dependencies-$(5)
+	$$(Q)$$(foreach hook,$$($(2)_CHECK_DEPENDENCIES_$$(call UPPERCASE,$(5))_HOOKS),$$(call $$(hook))$$(sep))
+
+$(2)_$(4)_ASCIIDOC_CONF = $(3)/asciidoc-$(4).conf
+ifneq ($$(wildcard $$($(2)_$(4)_ASCIIDOC_CONF)),)
+$(2)_$(4)_ASCIIDOC_OPTS += -f $$($(2)_$(4)_ASCIIDOC_CONF)
+endif
+
+# Handle a2x warning about --destination-dir option only applicable to HTML
+# based outputs. So:
+# - use the --destination-dir option if possible (html and split-html),
+# - otherwise copy the generated document to the output directory
+$(2)_$(4)_A2X_OPTS =
+ifneq ($$(filter $(5),html split-html),)
+$(2)_$(4)_A2X_OPTS += --destination-dir="$$(@D)"
+else
+define $(2)_$(4)_INSTALL_CMDS
+	$$(Q)cp -f $$(BUILD_DIR)/docs/$(1)/$(1).$(6) $$(@D)
+endef
+endif
+
+ifeq ($(6)-$$(GENDOC_XSLTPROC_IS_BROKEN),pdf-y)
+$$(O)/docs/$(1)/$(1).$(6):
+	$$(warning PDF generation is disabled because of a bug in \
+		xsltproc. To be able to generate a PDF, you should \
+		build xsltproc from the libxslt sources >=1.1.29 and pass it \
+		to make through the command line: \
+		'PATH=/path/to/custom-xsltproc/bin:$$$${PATH} make $(1)-pdf')
+else
+# -r $(@D) is there for documents that use external filters; those filters
+# generate code at the same location it finds the document's source files.
+$$(O)/docs/$(1)/$(1).$(6): $$($(2)_SOURCES) \
+			   $(1)-check-dependencies \
+			   $(1)-check-dependencies-$(5) \
+			   $(1)-prepare-sources
+	$$(Q)$$(call MESSAGE,"Generating $(7) $(1)...")
+	$$(Q)mkdir -p $$(@D)
+	$$(Q)a2x $(8) -f $(4) -d book -L \
+		$$(foreach r,$$($(2)_RESOURCES),-r $$(r)) -r $$(@D) \
+		$$($(2)_$(4)_A2X_OPTS) \
+		--asciidoc-opts="$$($(2)_$(4)_ASCIIDOC_OPTS)" \
+		$$(BUILD_DIR)/docs/$(1)/$(1).txt
+# install the generated document
+	$$($(2)_$(4)_INSTALL_CMDS)
+endif
+endef
+
+################################################################################
+# ASCIIDOC -- generates the make targets needed to build asciidoc documentation.
+#
+# The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
+# The variable <DOCUMENT_NAME>_RESOURCES defines where the document's
+# resources, such as images, are located; must be an absolute path.
+################################################################################
+define ASCIIDOC
+# Single line, because splitting a foreach is not easy...
+$(pkgname)-check-dependencies: asciidoc-check-dependencies
+	$$(Q)$$(foreach hook,$$($$(call UPPERCASE,$(pkgname))_CHECK_DEPENDENCIES_HOOKS),$$(call $$(hook))$$(sep))
+
+$$(BUILD_DIR)/docs/$(pkgname):
+	$$(Q)mkdir -p $$@
+
+# Single line, because splitting a foreach is not easy...
+$(pkgname)-rsync: $$(BUILD_DIR)/docs/$(pkgname)
+	$$(Q)$$(call MESSAGE,"Preparing the $(pkgname) sources...")
+	$$(Q)rsync -a $(pkgdir) $$^
+	$$(Q)$$(foreach hook,$$($$(call UPPERCASE,$(pkgname))_POST_RSYNC_HOOKS),$$(call $$(hook))$$(sep))
+
+$(pkgname)-prepare-sources: $(pkgname)-rsync
+
+$(call ASCIIDOC_INNER,$(pkgname),$$(call UPPERCASE,$(pkgname)),$(pkgdir),xhtml,html,html,HTML,\
+	--xsltproc-opts "--stringparam toc.section.depth 1")
+
+$(call ASCIIDOC_INNER,$(pkgname),$$(call UPPERCASE,$(pkgname)),$(pkgdir),chunked,split-html,chunked,split HTML,\
+	--xsltproc-opts "--stringparam toc.section.depth 1")
+
+# dblatex needs to pass the '--maxvars ...' option to xsltproc to prevent it
+# from reaching the template recursion limit when processing the (long) target
+# package table and bailing out.
+$(call ASCIIDOC_INNER,$(pkgname),$$(call UPPERCASE,$(pkgname)),$(pkgdir),pdf,pdf,pdf,PDF,\
+	--dblatex-opts "-P latex.output.revhistory=0 -x '--maxvars 100000'")
+
+$(call ASCIIDOC_INNER,$(pkgname),$$(call UPPERCASE,$(pkgname)),$(pkgdir),text,text,text,text)
+
+$(call ASCIIDOC_INNER,$(pkgname),$$(call UPPERCASE,$(pkgname)),$(pkgdir),epub,epub,epub,ePUB)
+
+clean: $(pkgname)-clean
+$(pkgname)-clean:
+	$$(Q)$$(RM) -rf $$(BUILD_DIR)/docs/$(pkgname)
+.PHONY: $(pkgname) $(pkgname)-clean
+endef
+
+################################################################################
+# asciidoc-document -- the target generator macro for asciidoc documents
+################################################################################
+
+asciidoc-document = $(call ASCIIDOC)