IMGS := $(wildcard img/*)

LATEX_BASE := $(MAKEFILE_DIR)latex
PANDOC_FILTER_DIR := $(MAKEFILE_DIR)pandoc
COMMON_IMAGES := $(LATEX_BASE)/images

COMMON_PANDOC_OPTIONS := --pdf-engine=lualatex --resource-path="$(COMMON_IMAGES):." --lua-filter "$(PANDOC_FILTER_DIR)/center-img.lua" --lua-filter "$(PANDOC_FILTER_DIR)/include-files.lua"
PANDOC := pandoc $(COMMON_PANDOC_OPTIONS)

SLIDES_OPTIONS := --slide-level 2 -t beamer

ADDITIONAL_TEX_INPUTS := LATEX_BASE:

RUBBER_OPTS := -m lualatex:pdf --shell-escape -I "$(LATEX_BASE)"

slides.pdf: slides.md $(wildcard img/*) $(MAKEFILE_LIST)
	@echo "building $@"
	$(PANDOC) $(SLIDES_OPTIONS) $< -o $@

%.pdf: %.md $(MAKEFILE_LIST)
	@echo "building $@"
	$(PANDOC) -f markdown $< -o $@

slides%.pdf: slides%.md slides.md $(wildcard img/*) $(MAKEFILE_LIST)
	@echo "building $@"
	$(PANDOC) $(SLIDES_OPTIONS) $< -o $@

%.pdf: %.tex $(MAKEFILE_LIST)
	@echo "building $@"
	rubber $(RUBBER_OPTS) $< && rubber --clean -q $<