docs: allow writing man pages in markdown

Some of the docs/misc documents are written in markdown language.
As an effort to cleanup man pages these documents will be converted into
man pages. To avoid some more conversion, add rules to the docs/Makefile
to generate man pages out of markdown files as well as pod ones.

However, pandoc doesn't know how to convert man pages links. Thus the
man links in markdown pages won't work.

Signed-off-by: Cédric Bosdonnat <cbosdonnat@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

1 files changed, 42 insertions, 6 deletions

diff --git a/docs/Makefile b/docs/Makefile
index e2537e8755..d3f5eb607c 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,13 +3,14 @@ include $(XEN_ROOT)/Config.mk
 -include $(XEN_ROOT)/config/Docs.mk
 
 VERSION		:= $(shell $(MAKE) -C $(XEN_ROOT)/xen --no-print-directory xenversion)
+DATE		:= $(shell date +%Y-%m-%d)
 
 DOC_ARCHES      := arm x86_32 x86_64
 
 # Documentation sources to build
-MAN1SRC-y := $(sort $(shell find man/ -name '*.pod.1' -print))
-MAN5SRC-y := $(sort $(shell find man/ -name '*.pod.5' -print))
-MAN8SRC-y := $(sort $(shell find man/ -name '*.pod.8' -print))
+MAN1SRC-y := $(sort $(shell find man/ -regex '.*\.\(pod\|markdown\)\.1' -print))
+MAN5SRC-y := $(sort $(shell find man/ -regex '.*\.\(pod\|markdown\)\.5' -print))
+MAN8SRC-y := $(sort $(shell find man/ -regex '.*\.\(pod\|markdown\)\.8' -print))
 
 MARKDOWNSRC-y := $(sort $(shell find misc -name '*.markdown' -print))
 
@@ -18,11 +19,17 @@ TXTSRC-y := $(sort $(shell find misc -name '*.txt' -print))
 PANDOCSRC-y := $(sort $(shell find features/ misc/ specs/ -name '*.pandoc' -print))
 
 # Documentation targets
-DOC_MAN1 := $(patsubst man/%.pod.1,man1/%.1,$(MAN1SRC-y))
-DOC_MAN5 := $(patsubst man/%.pod.5,man5/%.5,$(MAN5SRC-y))
-DOC_MAN8 := $(patsubst man/%.pod.8,man8/%.8,$(MAN8SRC-y))
+DOC_MAN1 := $(patsubst man/%.pod.1,man1/%.1,$(MAN1SRC-y)) \
+	        $(patsubst man/%.markdown.1,man1/%.1,$(MAN1SRC-y))
+DOC_MAN5 := $(patsubst man/%.pod.5,man5/%.5,$(MAN5SRC-y)) \
+	        $(patsubst man/%.markdown.5,man5/%.5,$(MAN5SRC-y))
+DOC_MAN8 := $(patsubst man/%.pod.8,man8/%.8,$(MAN8SRC-y)) \
+	        $(patsubst man/%.markdown.8,man8/%.8,$(MAN8SRC-y))
 DOC_HTML := $(patsubst %.markdown,html/%.html,$(MARKDOWNSRC-y)) \
             $(patsubst %.pandoc,html/%.html,$(PANDOCSRC-y)) \
+            $(patsubst man/%.markdown.1,html/man/%.1.html,$(MAN1SRC-y)) \
+            $(patsubst man/%.markdown.5,html/man/%.5.html,$(MAN5SRC-y)) \
+            $(patsubst man/%.markdown.8,html/man/%.8.html,$(MAN8SRC-y)) \
             $(patsubst man/%.pod.1,html/man/%.1.html,$(MAN1SRC-y)) \
             $(patsubst man/%.pod.5,html/man/%.5.html,$(MAN5SRC-y)) \
             $(patsubst man/%.pod.8,html/man/%.8.html,$(MAN8SRC-y)) \
@@ -31,6 +38,9 @@ DOC_HTML := $(patsubst %.markdown,html/%.html,$(MARKDOWNSRC-y)) \
 DOC_TXT  := $(patsubst %.txt,txt/%.txt,$(TXTSRC-y)) \
             $(patsubst %.markdown,txt/%.txt,$(MARKDOWNSRC-y)) \
             $(patsubst %.pandoc,txt/%.txt,$(PANDOCSRC-y)) \
+            $(patsubst man/%.markdown.1,txt/man/%.1.txt,$(MAN1SRC-y)) \
+            $(patsubst man/%.markdown.5,txt/man/%.5.txt,$(MAN5SRC-y)) \
+            $(patsubst man/%.markdown.8,txt/man/%.8.txt,$(MAN8SRC-y)) \
             $(patsubst man/%.pod.1,txt/man/%.1.txt,$(MAN1SRC-y)) \
             $(patsubst man/%.pod.5,txt/man/%.5.txt,$(MAN5SRC-y)) \
             $(patsubst man/%.pod.8,txt/man/%.8.txt,$(MAN8SRC-y))
@@ -89,6 +99,16 @@ else
 	@echo "pod2man not installed; skipping $$@"
 endif
 
+man$(1)/%.$(1): man/%.markdown.$(1) Makefile
+ifneq ($(PANDOC),)
+	@$(INSTALL_DIR) $$(@D)
+	$(PANDOC) --standalone -V title=$$* -V section=$(1) \
+		      -V date="$(DATE)" -V footer="$(VERSION)" \
+			  -V header=Xen $$< -t man --output $$@
+else
+	@echo "pandoc not installed; skipping $$@"
+endif
+
 # HTML manpages
 html/man/%.$(1).html: man/%.pod.$(1) Makefile
 ifneq ($(POD2HTML),)
@@ -98,6 +118,14 @@ else
 	@echo "pod2html not installed; skipping $$@"
 endif
 
+html/man/%.$(1).html: man/%.markdown.$(1) Makefile
+ifneq ($(PANDOC),)
+	@$(INSTALL_DIR) $$(@D)
+	$(PANDOC) --standalone $$< -t html --toc --output $$@
+else
+	@echo "pandoc not installed; skipping $$@"
+endif
+
 # Text manpages
 txt/man/%.$(1).txt: man/%.pod.$(1) Makefile
 ifneq ($(POD2TEXT),)
@@ -107,6 +135,14 @@ else
 	@echo "pod2text not installed; skipping $$@"
 endif
 
+txt/man/%.$(1).txt: man/%.markdown.$(1) Makefile
+ifneq ($(PANDOC),)
+	@$(INSTALL_DIR) $$(@D)
+	$(PANDOC) --standalone $$< -t plain --output $$@
+else
+	@echo "pandoc not installed; skipping $$@"
+endif
+
 # Build
 .PHONY: man$(1)-pages
 man$(1)-pages: $$(DOC_MAN$(1))