stack_path != which stack

all: $(if $(stack_path),,install-stack)
	stack build
	ln -sfT $$(stack path --local-install-root)/bin ./bin

.PHONY: all run install install-dev-tools

run: all
	./bin/repgoal

install:
	stack install

install-dev-tools:
	stack install apply-refact hlint stylish-haskell hasktags hoogle

become_root != [ "$$(id -u)" = 0 ] || echo sudo
install-stack:
ifneq (,$(shell which curl))
	curl -sSL https://get.haskellstack.org/ | sh
else
ifneq (,$(shell which wget))
	wget -qO- https://get.haskellstack.org/ | sh
else
ifneq (,$(shell which apt))
	$(become_root) apt install haskell-stack
else
	$(error No stack binary found; and no known means of installing (no curl, wget, or apt).\
	Follow instructions at <https://haskellstack.org>)
endif
endif
endif

%.html: %.md
	pandoc -f markdown -t html -o $@ $^