PRESENTATIONS := $(patsubst src/%/presentation.tex,build/presentation_%.pdf,$(wildcard src/*/presentation.tex))
HANDOUTS := $(patsubst build/presentation_%.pdf,build/presentation_%_handout.pdf,$(PRESENTATIONS))

RC_PDFLATEX := $(shell grep '$$pdflatex' .latexmkrc \
	       | sed -e 's/.*"\(.*\)".*/\1/' -e 's/%S//' -e 's/%O//')

.PHONY: all
all: $(PRESENTATIONS) $(HANDOUTS)

build/presentation_%.pdf: src/%/presentation.tex build/prepared
	TEXINPUTS=./lib/cel-slides-template-2025:$(dir $<):$$TEXINPUTS \
		latexmk -outdir=build/$* $<
	cp build/$*/presentation.pdf $@

build/presentation_%_handout.pdf: src/%/presentation.tex build/prepared
	TEXINPUTS=./lib/cel-slides-template-2025:$(dir $<):$$TEXINPUTS \
		latexmk -outdir=build/$*_handout \
		-pdflatex='$(RC_PDFLATEX) %O "\def\ishandout{1}\input{%S}"' $<
	cp build/$*_handout/presentation.pdf $@

build/prepared:
	mkdir build
	touch build/prepared

.PHONY: clean
clean:
	rm -rf build