HOST ?= rhiannon.website
REMOTE_USER ?= www-data
IDFILE ?= ~/.ssh/xyz
REMOTE_DIR ?= lang

TMPDIR   ?= _tmp
BUILDDIR ?= _build
PAGESDIR ?= pages
DATADIR  ?= data
TEMPLATE ?= $(DATADIR)/template.html

STATICEXTS := yaml

PAGES != find $(PAGESDIR) -name '*.md'
STATICS != parallel find $(PAGESDIR) -name '\*.{}' ::: $(STATICEXTS)
OUTPUTPAGES = \
  $(patsubst $(PAGESDIR)/%.md,$(BUILDDIR)/%.html,$(PAGES)) \
  $(patsubst $(PAGESDIR)/%,$(BUILDDIR)/%,$(STATICS))

STYLE != find style -type f
OUTPUTSTYLE = $(patsubst %,$(BUILDDIR)/%,$(STYLE))

OUTPUT = $(OUTPUTPAGES) $(OUTPUTSTYLE)

LANGFILTER = $(TMPDIR)/langfilter
LAANTAS_SCRIPT = $(TMPDIR)/laantas-script
EXECS = $(LANGFILTER)

.PHONY: all
all: build

.PHONY: build
build: $(OUTPUT)

$(BUILDDIR)/%.html: $(PAGESDIR)/%.md $(TEMPLATE) $(LANGFILTER) $(LAANTAS_SCRIPT)
	mkdir -p $(dir $@)
	LAANTAS_SCRIPT="$(LAANTAS_SCRIPT)" \
	  DIRNAME="$(subst $(PAGESDIR),$(BUILDDIR),$(dir $<))" \
	  pandoc -s --toc --template $(TEMPLATE) -o $@ $< \
	    --filter $(LANGFILTER)

$(BUILDDIR)/%: $(PAGESDIR)/%
	mkdir -p $(dir $@)
	cp $< $@

$(BUILDDIR)/%: %
	mkdir -p $(dir $@)
	cp $< $@

$(LANGFILTER): langfilter/*.hs langfilter/langfilter.cabal
	cabal build langfilter
	mkdir -p $(dir $@)
	find dist-newstyle -name $(notdir $@) \
	  -print -type f -exec cp {} $(TMPDIR) \;

$(LAANTAS_SCRIPT): laantas-script/*.hs laantas-script/laantas-script.cabal
	cabal build laantas-script
	mkdir -p $(dir $@)
	find dist-newstyle -name $(notdir $@) \
	  -type f -exec cp {} $(TMPDIR) \;


upload: build
	@rsync -rPLzh --delete -e 'ssh -l $(REMOTE_USER) -i $(IDFILE)' \
	  $(BUILDDIR)/ $(HOST):$(REMOTE_DIR)/



.PHONY: clean distclean
clean:
	rm -rf $(BUILDDIR)
distclean: clean
	rm -rf $(TMPDIR)
	cabal clean