package/doc-asciidoc.mk

   1 # we can't use suitable-host-package here because that's not available in
   2 # the context of 'make release'
   3 asciidoc-check-dependencies:
   4         $(Q)if [ -z "$(shell support/dependencies/check-host-asciidoc.sh)" ]; then \
   5                 echo "You need a sufficiently recent asciidoc on your host" \
   6                         "to generate documents"; \
   7                 exit 1; \
   8         fi
   9         $(Q)if [ -z "`which w3m 2>/dev/null`" ]; then \
  10                 echo "You need w3m on your host to generate documents"; \
  11                 exit 1; \
  12         fi
  13
  14 asciidoc-check-dependencies-pdf:
  15         $(Q)if [ -z "`which dblatex 2>/dev/null`" ]; then \
  16                 echo "You need dblatex on your host to generate PDF documents"; \
  17                 exit 1; \
  18         fi
  19
  20 # PDF generation is broken because of a bug in xsltproc program provided
  21 # by libxslt <=1.1.28, which does not honor an option we need to set.
  22 # Fortunately, this bug is already fixed upstream:
  23 #   https://gitorious.org/libxslt/libxslt/commit/5af7ad745323004984287e48b42712e7305de35c
  24 #
  25 # So, bail out when trying to build a PDF using a buggy version of the
  26 # xsltproc program.
  27 #
  28 # So, to overcome this issue and being able to build a PDF, you can
  29 # build xsltproc from its source repository, then run:
  30 #   $ PATH=/path/to/custom-xsltproc/bin:${PATH} make manual
  31 GENDOC_XSLTPROC_IS_BROKEN = \
  32         $(shell xsltproc --maxvars 0 >/dev/null 2>/dev/null || echo y)
  33
  34 # Apply this configuration to all documents
  35 BR_ASCIIDOC_CONF = docs/conf/asciidoc.conf
  36
  37 ################################################################################
  38 # ASCIIDOC_INNER -- generates the make targets needed to build a specific type of
  39 #                   asciidoc documentation.
  40 #
  41 #  argument 1 is the name of the document and the top-level asciidoc file must
  42 #             have the same name
  43 #  argument 2 is the uppercase name of the document
  44 #  argument 3 is the directory containing the document
  45 #  argument 4 is the type of document to generate (-f argument of a2x)
  46 #  argument 5 is the document type as used in the make target
  47 #  argument 6 is the output file extension for the document type
  48 #  argument 7 is the human text for the document type
  49 #  argument 8 (optional) are extra arguments for a2x
  50 #
  51 # The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
  52 #
  53 # Since this function will be called from within an $(eval ...)
  54 # all variable references except the arguments must be $$-quoted.
  55 ################################################################################
  56 define ASCIIDOC_INNER
  57 $(1): $(1)-$(5)
  58 .PHONY: $(1)-$(5)
  59 $(1)-$(5): $$(O)/docs/$(1)/$(1).$(6)
  60
  61 # Single line, because splitting a foreach is not easy...
  62 asciidoc-check-dependencies-$(5):
  63 $(1)-check-dependencies-$(5): asciidoc-check-dependencies-$(5)
  64         $$(Q)$$(foreach hook,$$($(2)_CHECK_DEPENDENCIES_$$(call UPPERCASE,$(5))_HOOKS),$$(call $$(hook))$$(sep))
  65
  66 # Include Buildroot's AsciiDoc configuration first:
  67 #  - generic configuration,
  68 #  - then output-specific configuration
  69 ifneq ($$(wildcard $$(BR_ASCIIDOC_CONF)),)
  70 $(2)_$(4)_ASCIIDOC_OPTS += -f $$(BR_ASCIIDOC_CONF)
  71 endif
  72 BR_$(4)_ASCIIDOC_CONF = docs/conf/asciidoc-$(4).conf
  73 ifneq ($$(wildcard $$(BR_$(4)_ASCIIDOC_CONF)),)
  74 $(2)_$(4)_ASCIIDOC_OPTS += -f $$(BR_$(4)_ASCIIDOC_CONF)
  75 endif
  76
  77 # Then include the document's AsciiDoc configuration:
  78 #  - generic configuration,
  79 #  - then output-specific configuration
  80 ifneq ($$(wildcard $$($(2)_ASCIIDOC_CONF)),)
  81 $(2)_$(4)_ASCIIDOC_OPTS += -f $$($(2)_ASCIIDOC_CONF)
  82 endif
  83 $(2)_$(4)_ASCIIDOC_CONF = $(3)/asciidoc-$(4).conf
  84 ifneq ($$(wildcard $$($(2)_$(4)_ASCIIDOC_CONF)),)
  85 $(2)_$(4)_ASCIIDOC_OPTS += -f $$($(2)_$(4)_ASCIIDOC_CONF)
  86 endif
  87
  88 # Handle a2x warning about --destination-dir option only applicable to HTML
  89 # based outputs. So:
  90 # - use the --destination-dir option if possible (html and split-html),
  91 # - otherwise copy the generated document to the output directory
  92 $(2)_$(4)_A2X_OPTS =
  93 ifneq ($$(filter $(5),html split-html),)
  94 $(2)_$(4)_A2X_OPTS += --destination-dir="$$(@D)"
  95 else
  96 define $(2)_$(4)_INSTALL_CMDS
  97         $$(Q)cp -f $$(BUILD_DIR)/docs/$(1)/$(1).$(6) $$(@D)
  98 endef
  99 endif
 100
 101 $$(O)/docs/$(1)/$(1).$(6): export TZ=UTC
 102
 103 ifeq ($(6)-$$(GENDOC_XSLTPROC_IS_BROKEN),pdf-y)
 104 $$(O)/docs/$(1)/$(1).$(6):
 105         $$(warning PDF generation is disabled because of a bug in \
 106                 xsltproc. To be able to generate a PDF, you should \
 107                 build xsltproc from the libxslt sources >=1.1.29 and pass it \
 108                 to make through the command line: \
 109                 'PATH=/path/to/custom-xsltproc/bin:$$$${PATH} make $(1)-pdf')
 110 else
 111 # -r $(@D) is there for documents that use external filters; those filters
 112 # generate code at the same location it finds the document's source files.
 113 $$(O)/docs/$(1)/$(1).$(6): $$($(2)_SOURCES) \
 114                            $(1)-check-dependencies \
 115                            $(1)-check-dependencies-$(5) \
 116                            $(1)-prepare-sources
 117         $$(Q)$$(call MESSAGE,"Generating $(7) $(1)...")
 118         $$(Q)mkdir -p $$(@D)
 119         $$(Q)a2x $(8) -f $(4) -d book -L \
 120                 $$(foreach r,$$($(2)_RESOURCES) $$(@D), \
 121                         --resource="$$(abspath $$(r))") \
 122                 $$($(2)_$(4)_A2X_OPTS) \
 123                 --asciidoc-opts="$$($(2)_$(4)_ASCIIDOC_OPTS)" \
 124                 $$(BUILD_DIR)/docs/$(1)/$(1).txt
 125 # install the generated document
 126         $$($(2)_$(4)_INSTALL_CMDS)
 127 endif
 128 endef
 129
 130 ################################################################################
 131 # ASCIIDOC -- generates the make targets needed to build asciidoc documentation.
 132 #
 133 # argument 1 is the lowercase name of the document; the document's main file
 134 #            must have the same name, with the .txt extension
 135 # argument 2 is the uppercase name of the document
 136 # argument 3 is the directory containing the document's sources
 137 #
 138 # The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
 139 # The variable <DOCUMENT_NAME>_RESOURCES defines where the document's
 140 # resources, such as images, are located; must be an absolute path.
 141 ################################################################################
 142 define ASCIIDOC
 143 # Single line, because splitting a foreach is not easy...
 144 $(1)-check-dependencies: asciidoc-check-dependencies
 145         $$(Q)$$(foreach hook,$$($(2)_CHECK_DEPENDENCIES_HOOKS),$$(call $$(hook))$$(sep))
 146
 147 # Single line, because splitting a foreach is not easy...
 148 # Do not touch the stamp file, so we get to rsync again every time we build
 149 # the document.
 150 $$(BUILD_DIR)/docs/$(1)/.stamp_doc_rsynced:
 151         $$(Q)$$(call MESSAGE,"Preparing the $(1) sources...")
 152         $$(Q)mkdir -p $$(@D)
 153         $$(Q)rsync -a $(3) $$(@D)
 154         $$(Q)$$(foreach hook,$$($(2)_POST_RSYNC_HOOKS),$$(call $$(hook))$$(sep))
 155
 156 $(1)-prepare-sources: $$(BUILD_DIR)/docs/$(1)/.stamp_doc_rsynced
 157
 158 $(2)_ASCIIDOC_CONF = $(3)/asciidoc.conf
 159
 160 $(call ASCIIDOC_INNER,$(1),$(2),$(3),xhtml,html,html,HTML,\
 161         --xsltproc-opts "--stringparam toc.section.depth 1")
 162
 163 $(call ASCIIDOC_INNER,$(1),$(2),$(3),chunked,split-html,chunked,split HTML,\
 164         --xsltproc-opts "--stringparam toc.section.depth 1")
 165
 166 # dblatex needs to pass the '--maxvars ...' option to xsltproc to prevent it
 167 # from reaching the template recursion limit when processing the (long) target
 168 # package table and bailing out.
 169 $(call ASCIIDOC_INNER,$(1),$(2),$(3),pdf,pdf,pdf,PDF,\
 170         --dblatex-opts "-P latex.output.revhistory=0 -x '--maxvars 100000'")
 171
 172 $(call ASCIIDOC_INNER,$(1),$(2),$(3),text,text,text,text)
 173
 174 $(call ASCIIDOC_INNER,$(1),$(2),$(3),epub,epub,epub,ePUB)
 175
 176 clean: $(1)-clean
 177 $(1)-clean:
 178         $$(Q)$$(RM) -rf $$(BUILD_DIR)/docs/$(1)
 179 .PHONY: $(1) $(1)-clean
 180 endef
 181
 182 ################################################################################
 183 # asciidoc-document -- the target generator macro for asciidoc documents
 184 ################################################################################
 185
 186 asciidoc-document = $(call ASCIIDOC,$(pkgname),$(call UPPERCASE,$(pkgname)),$(pkgdir))