Add documentation target to build the docs

Makefile

@@ -1,4 +1,23 @@
-.PHONY: generated_pdfs/dyOptInitialGuess.pdf
+.PHONY: generated_pdfs/dyOptInitialGuess.pdf generated_pdfs/cruntimedraft.pdf usersguide
 all: generated_pdfs/dyOptInitialGuess.pdf
+generated_pdfs/cruntimedraft.pdf:
+	latexmk -outdir=generated_pdfs -lualatex SimulationRuntime/c/src/cruntimedraft.tex
 generated_pdfs/dyOptInitialGuess.pdf:
-	latexmk -outdir=generated_pdfs -pdf SimulationRuntime/DynamicOptimization/src/dyOptInitialGuess.tex
+	latexmk -outdir=generated_pdfs -lualatex SimulationRuntime/DynamicOptimization/src/dyOptInitialGuess.tex
+usersguide:
+	$(MAKE) -C UsersGuide html
+	@# OMPython sucks at cleaning up...
+	@killall omc >/dev/null 2>&1
+BUILDDIR=openmodelica-doc_$(BUILDDIR_VER)
+docs-internal: generated_pdfs/dyOptInitialGuess.pdf generated_pdfs/cruntimedraft.pdf usersguide
+	@test ! -z "$(BUILDDIR_VER)" || (echo Call docs, not docs-internal directly; false)
+	@test ! -z "$(BUILDDIR)"
+	rm -rf ./$(BUILDDIR)
+	mkdir -p ./$(BUILDDIR)/SystemDocumentation "./$(BUILDDIR)/OpenModelicaUsersGuide"
+	cp generated_pdfs/cruntimedraft.pdf generated_pdfs/dyOptInitialGuess.pdf OpenModelicaMetaProgramming.pdf OpenModelicaSystem.pdf OpenModelicaTemplateProgramming.pdf "./$(BUILDDIR)/SystemDocumentation"
+	cp ModelicaTutorialFritzson.pdf "./$(BUILDDIR)/"
+	cp -a UsersGuide/build/html/* "./$(BUILDDIR)/OpenModelicaUsersGuide"
+	tar cJf "$(BUILDDIR).orig.tar.xz" "./$(BUILDDIR)"
+docs:
+	test -f ../common/semver.sh
+	$(MAKE) docs-internal BUILDDIR_VER="`cd ../ && ./common/semver.sh | sed -e 's/-dev[.]/~dev-/' -e 's/^v//'`"