#!/usr/bin/make -sf

SITEURL := https://blog.danieliu.xyz
USERVAR1 :=
USERVAR2 :=

.PHONY: help build clean

# internal variables
TEMPLATE_DIR := templates
BUILD_DIR := build
SRC_DIR := articles
MODULE_DIR := modules

ARTICLE_PATH := $(BUILD_DIR)/article
ARTICLE_LIST := $(basename $(shell ls $(SRC_DIR)))

# some helper functions
define export_common
	export SITEURL="$(SITEURL)"
	export USERVAR1="$(USERVAR1)"
	export USERVAR2="$(USERVAR2)"
endef

help:
	echo 'pinopress help|build|clean'

build: $(BUILD_DIR)/rolling.html $(BUILD_DIR)/archive.html $(ARTICLE_PATH)/$(addsuffix .html,$(ARTICLE_LIST))

.ONESHELL:
$(BUILD_DIR)/rolling.html:
	echo 'building rolling file'
	$(export_common)
	cat $(TEMPLATE_DIR)/head.template.html $(TEMPLATE_DIR)/rollingbody.template.html $(TEMPLATE_DIR)/foot.template.html > "$@"
	envsubst < "$@" | sponge "$@"

.ONESHELL:
$(BUILD_DIR)/archive.html:
	echo 'building archive file'
	$(export_common)
	cat $(TEMPLATE_DIR)/head.template.html $(TEMPLATE_DIR)/archivebody.template.html $(TEMPLATE_DIR)/foot.template.html > "$@"
	envsubst < "$@" | sponge "$@"

.ONESHELL:
$(ARTICLE_PATH)/%.html: articles/%.md
	echo 'parsing $^'
	$(export_common)
	export ARTICLE_TITLE="$(shell ./$(MODULE_DIR)/md-header "$<" name)"
	export PUBLISHED_DATE="$(shell ./$(MODULE_DIR)/md-header "$<" published)"
	cat $(TEMPLATE_DIR)/head.template.html > "$@"
	# module pipeline starts here
	./$(MODULE_DIR)/md "$^" >> "$@"
	# module pipeline ends here
	cat $(TEMPLATE_DIR)/foot.template.html >> "$@"
	envsubst < "$@" | sponge "$@"

clean:
	echo 'cleaning...'
	rm $(BUILD_DIR)/rolling.html $(BUILD_DIR)/archive.html $(ARTICLE_PATH)/*