ASCIIDOC ?= asciidoc
ASCIIDOC_EXTRA ?=

all: html pdf

ifeq ($(origin VERSION), undefined)
  VERSION := $(shell ../GEN-DOC-VERSION 2>/dev/null)
endif

clean:
	@echo $(VERSION)
	rm -rf $(TARGET)

DOC_HTML := $(patsubst %.txt,$(TARGET)/%.html,$(wildcard *.txt))
DOC_PDF := $(patsubst %.txt,$(TARGET)/%.pdf,$(wildcard *.txt))
COMMIT := $(shell git describe HEAD | sed s/^v//)

ifeq ($(VERSION),)
  REVISION = $(COMMIT)
else
  ifeq ($(VERSION),$(COMMIT))
    REVISION := $(VERSION)
  else
    REVISION := $(VERSION) (from v$(COMMIT))
  endif
endif

html: $(DOC_HTML)

$(DOC_HTML): $(TARGET)/%.html : %.txt
	@mkdir -p $(TARGET)
	@echo "FORMAT $@"
	@rm -f $@+ $@
	@$(ASCIIDOC) -a toc \
		-a data-uri \
		-a 'revision=$(REVISION)' \
		-a 'newline=\n' \
		-b xhtml11 \
		-f ../../asciidoc.conf \
		$(ASCIIDOC_EXTRA) \
		-o $@+ $<
	@mv $@+ $@

pdf: $(DOC_PDF)

$(DOC_PDF): $(TARGET)/%.pdf : %.txt
	@mkdir -p $(TARGET)
	@echo "FORMAT $@"
	@rm -f $@+ $@
	@a2x -f pdf -D $(dir $@) $<