docs/rst: Use pandoc to render ReStructuredText

Sphinx uses ReStructuredText as its markup format.  Although missing the
project wide integration, individual *.rst files can be rendered by pandoc to
suppliement our existing ad-hoc documentation.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

docs/Makefile

@@ -11,6 +11,8 @@ MAN_SECTIONS    := 1 5 7 8
 # Documentation sources to build
 MAN-SRC-y := $(sort $(basename $(wildcard man/*.pod man/*.pandoc)))
 
+RST-SRC-y := $(sort $(filter-out %index.rst,$(shell find * -type f -name '*.rst' -print)))
+
 TXTSRC-y := $(sort $(shell find misc -name '*.txt' -print))
 
 PANDOCSRC-y := $(sort $(shell find designs/ features/ misc/ process/ specs/ -name '*.pandoc' -print))
@@ -22,13 +24,16 @@ $(foreach i,$(MAN_SECTIONS), \
 
 DOC_HTML := html/SUPPORT.html \
             $(patsubst %.pandoc,html/%.html,$(PANDOCSRC-y)) \
+            $(patsubst %.rst,html/%.html,$(RST-SRC-y)) \
             $(patsubst %,html/%.html,$(MAN-SRC-y)) \
             $(patsubst %.txt,html/%.txt,$(TXTSRC-y)) \
             $(patsubst %,html/hypercall/%/index.html,$(DOC_ARCHES))
 DOC_TXT  := $(patsubst %.txt,txt/%.txt,$(TXTSRC-y)) \
             $(patsubst %.pandoc,txt/%.txt,$(PANDOCSRC-y)) \
+            $(patsubst %.rst,txt/%.txt,$(RST-SRC-y)) \
             $(patsubst %,txt/%.txt,$(MAN-SRC-y))
-DOC_PDF  := $(patsubst %.pandoc,pdf/%.pdf,$(PANDOCSRC-y))
+DOC_PDF  := $(patsubst %.pandoc,pdf/%.pdf,$(PANDOCSRC-y)) \
+            $(patsubst %.rst,pdf/%.pdf,$(RST-SRC-y))
 
 # Top level build targets
 .PHONY: all
@@ -224,8 +229,11 @@ define GENERATE_PANDOC_RULE
 $(call GENERATE_PANDOC_RULE_RAW,$(1)/%.$(1),%.$(2))
 endef
 $(eval $(call GENERATE_PANDOC_RULE,pdf,pandoc))   # pdf/%.pdf: %.pandoc
+$(eval $(call GENERATE_PANDOC_RULE,pdf,rst))      # pdf/%.pdf: %.rst
 $(eval $(call GENERATE_PANDOC_RULE,txt,pandoc))   # txt/%.txt: %.pandoc
+$(eval $(call GENERATE_PANDOC_RULE,txt,rst))      # txt/%.txt: %.rst
 $(eval $(call GENERATE_PANDOC_RULE,html,pandoc))  # html/%.html: %.pandoc
+$(eval $(call GENERATE_PANDOC_RULE,html,rst))     # html/%.html: %.rst
 
 $(eval $(call GENERATE_PANDOC_RULE_RAW,html/SUPPORT.html,$(XEN_ROOT)/SUPPORT.md))