buildroot/package/doc-asciidoc.mk
Yann E. MORIN e2cd2337d7 doc/asciidoc: always use UTC
Currently, the manual is rendered with the timezone of the user running
the rendering. This timezone can fluctuate, depending on the date, due
to DST (Daylight Saving Time). Currently, the manual is rendered in
either CET or CEST (Central European Time, or its DST variant.)

So, a manual rendered during the summer or the winter would refer to a
non-constant timezone. If the machine and/or user doing the rendering
also changes, there is no guarantee the timezone would still be CET/CEST.
This is not a hard issue, since the user can still deduce the time in
UTC, but is just incoherent.

Just force the timezone to be UTC when doing the rendering of the
manual, so we are not dependent on the machine or user doing the
rendering.

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: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-10-12 07:46:28 +02:00

186 lines
7.3 KiB
Makefile

# 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)
# Apply this configuration to all documents
BR_ASCIIDOC_CONF = docs/conf/asciidoc.conf
################################################################################
# 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))$$(sep))
# Include Buildroot's AsciiDoc configuration first:
# - generic configuration,
# - then output-specific configuration
ifneq ($$(wildcard $$(BR_ASCIIDOC_CONF)),)
$(2)_$(4)_ASCIIDOC_OPTS += -f $$(BR_ASCIIDOC_CONF)
endif
BR_$(4)_ASCIIDOC_CONF = docs/conf/asciidoc-$(4).conf
ifneq ($$(wildcard $$(BR_$(4)_ASCIIDOC_CONF)),)
$(2)_$(4)_ASCIIDOC_OPTS += -f $$(BR_$(4)_ASCIIDOC_CONF)
endif
# Then include the document's AsciiDoc configuration:
# - generic configuration,
# - then output-specific configuration
ifneq ($$(wildcard $$($(2)_ASCIIDOC_CONF)),)
$(2)_$(4)_ASCIIDOC_OPTS += -f $$($(2)_ASCIIDOC_CONF)
endif
$(2)_$(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
$$(O)/docs/$(1)/$(1).$(6): export TZ=UTC
ifeq ($(6)-$$(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.
#
# argument 1 is the lowercase name of the document; the document's main file
# must have the same name, with the .txt extension
# argument 2 is the uppercase name of the document
# argument 3 is the directory containing the document's sources
#
# 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...
$(1)-check-dependencies: asciidoc-check-dependencies
$$(Q)$$(foreach hook,$$($(2)_CHECK_DEPENDENCIES_HOOKS),$$(call $$(hook))$$(sep))
# Single line, because splitting a foreach is not easy...
# Do not touch the stamp file, so we get to rsync again every time we build
# the document.
$$(BUILD_DIR)/docs/$(1)/.stamp_doc_rsynced:
$$(Q)$$(call MESSAGE,"Preparing the $(1) sources...")
$$(Q)mkdir -p $$(@D)
$$(Q)rsync -a $(3) $$(@D)
$$(Q)$$(foreach hook,$$($(2)_POST_RSYNC_HOOKS),$$(call $$(hook))$$(sep))
$(1)-prepare-sources: $$(BUILD_DIR)/docs/$(1)/.stamp_doc_rsynced
$(2)_ASCIIDOC_CONF = $(3)/asciidoc.conf
$(call ASCIIDOC_INNER,$(1),$(2),$(3),xhtml,html,html,HTML,\
--xsltproc-opts "--stringparam toc.section.depth 1")
$(call ASCIIDOC_INNER,$(1),$(2),$(3),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.
$(call ASCIIDOC_INNER,$(1),$(2),$(3),pdf,pdf,pdf,PDF,\
--dblatex-opts "-P latex.output.revhistory=0 -x '--maxvars 100000'")
$(call ASCIIDOC_INNER,$(1),$(2),$(3),text,text,text,text)
$(call ASCIIDOC_INNER,$(1),$(2),$(3),epub,epub,epub,ePUB)
clean: $(1)-clean
$(1)-clean:
$$(Q)$$(RM) -rf $$(BUILD_DIR)/docs/$(1)
.PHONY: $(1) $(1)-clean
endef
################################################################################
# asciidoc-document -- the target generator macro for asciidoc documents
################################################################################
asciidoc-document = $(call ASCIIDOC,$(pkgname),$(call UPPERCASE,$(pkgname)),$(pkgdir))