docs: auto update revname and revdate

Related: redhat-performance#764

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>

Author: yarda

doc/manual/Makefile

@@ -1,9 +1,12 @@
 .PHONY: clean
 
+DOCVER=$(shell cd ../..; $$PYTHON -c 'import tuned.version as v; print(v.TUNED_VERSION_STR)')
+DOCDATE=$(shell date '+%Y-%m-%d')
+
 index.html: master.adoc assemblies/*.adoc meta/*.adoc modules/performance/*.adoc ../../tuned/plugins/plugin_*.py ../../tuned/profiles/functions/function_*.py
 	$(PYTHON) ./compile_plugin_docs.py ../../tuned/plugins plugin_ Plugin modules/performance/ref_available-tuned-plug-ins_intro.adoc modules/performance/ref_available-tuned-plug-ins.adoc
 	$(PYTHON) ./compile_plugin_docs.py ../../tuned/profiles/functions function_ Function modules/performance/ref_built-in-functions-available-in-tuned-profiles_intro.adoc modules/performance/ref_built-in-functions-available-in-tuned-profiles.adoc
-	asciidoctor -o index.html master.adoc || asciidoc -d book -o index.html master.adoc
+	asciidoctor -a revnumber=$(DOCVER) -a revdate=$(DOCDATE) -o index.html master.adoc || asciidoc -a revnumber=$(DOCVER) -a revdate=$(DOCDATE) -d book -o index.html master.adoc
 
 install: index.html
 	install -Dpm 0644 index.html $(DESTDIR)$(DOCDIR)/manual/index.html