SOURCES               = $(wildcard *.tex)
PDF_VIEWER           ?= $(firstword $(shell which okular acroread))
PNG_VIEWER           ?= $(firstword $(shell which qiv gimp))
MAIN_TEX             ?= $(firstword $(wildcard main.tex *.tex))
MAIN                 ?= $(patsubst %.tex,$(MAIN_TEX))
OUT_PDF              ?= $(notdir $(shell pwd)).pdf
OUT_PNG              ?= $(patsubst %.pdf,%.png,$(OUT_PDF))
PNG_WIDTH            ?= 200

all: pdf
clean: clean.files
install:
distclean:

pdf: $(OUT_PDF)
png: $(OUT_PNG)

view: $(OUT_PDF)
	$(PDF_VIEWER) $<

view-png: $(OUT_PNG)
	$(PNG_VIEWER) $<

$(OUT_PDF): $(SOURCES)
	pdflatex $(MAIN_TEX)
	test -e $(basename $(MAIN_TEX)).pdf
	if [ "$(basename $(MAIN_TEX)).pdf" != "$(OUT_PDF)" ]; then mv $(basename $(MAIN_TEX)).pdf $(OUT_PDF); fi
	touch $@

$(OUT_PNG): $(OUT_PDF)
	convert -density 400 -scale x$(PNG_WIDTH) $< $@

clean.files:
	$(RM) -rf *.done *.aux *.log *.pdf *.nav *.out *.snm *.toc .*.swp $(OUT_PNG) *.vrb