#
# LibreSignage main build targets.
#

# Note: This makefile assumes that $(ROOT) always has a trailing
# slash. (which is the case when using the makefile $(dir ...)
# function) Do not use the shell dirname command here as that WILL
# break things since it doesn't add the trailing slash to the path.
ROOT := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))

SASS_DEP := build/scripts/sassdep.py
SASS_IPATHS := $(ROOT) $(ROOT)src/common/css $(ROOT)/src/node_modules
SASS_FLAGS := --no-source-map $(addprefix -I,$(SASS_IPATHS))

COMPOSER_DEP := build/scripts/composer_prod_deps.sh
COMPOSER_DEP_FLAGS := --self

POSTCSS_FLAGS := --config postcss.config.js --replace --no-map

# Production PHP libraries.
PHP_LIBS := $(shell find $(addprefix vendor/,\
	$(shell "./$(COMPOSER_DEP)" "$(COMPOSER_DEP_FLAGS)"|cut -d' ' -f1) composer\
) -type f) vendor/autoload.php

# Production JavaScript libraries.
JS_LIBS := $(filter-out \
	$(shell printf "$(ROOT)\n"|sed 's:/$$::g'), \
	$(shell npm ls --prod --parseable|sed 's/\n/ /g') \
)

# Non-compiled files.
SRC_FILES := $(shell find src \
	\( -type f -path 'src/node_modules/*' -prune \) \
	-o \( \
		-type f ! -name '*.swp' \
		-a -type f ! -name '*.save' \
		-a -type f ! -name '.\#*' \
		-a -type f ! -name '\#*\#*' \
		-a -type f ! -name '*~' \
		-a -type f ! -name '*.js' \
		-a -type f ! -name '*.scss' \
		-a -type f ! -name '*.rst' -print \
	\) \
)

# RST sources.
SRC_RST := $(shell find src \
	\( -type f -path 'src/node_modules/*' -prune \) \
	-o -type f -name '*.rst' -print \
) README.rst CONTRIBUTING.rst AUTHORS.rst

# SCSS sources.
SRC_SCSS := $(shell find src \
	\( -type f -path 'src/node_modules/*' -prune \) \
	-o -type f -name '*.scss' -a ! -name '_*' -print \
)

# JavaScript sources.
SRC_JS := $(shell find src \
	\( -type f -path 'src/node_modules/*' -prune \) \
	-o \( -type f -name 'main.js' -print \) \
)

# Generated PNG logo paths.
GENERATED_LOGOS := $(addprefix \
	dist/public/assets/images/logo/libresignage_,\
	16x16.png \
	32x32.png \
	96x96.png \
	text_466x100.png \
	text_inverted_466x100.png\
)

.PHONY: \
	files \
	js \
	css \
	config \
	libs \
	docs \
	htmldocs

.ONESHELL:

build:: files docs htmldocs js css js_libs php_libs logo; @:
files:: $(subst src,dist,$(SRC_FILES)); @:
js:: $(subst src,dist/public,$(SRC_JS)); @:
docs:: $(addprefix dist/doc/rst/,$(notdir $(SRC_RST))); @:
htmldocs:: $(addprefix dist/public/doc/html/,$(notdir $(SRC_RST:.rst=.html))); @:
css:: $(subst src,dist/public,$(SRC_SCSS:.scss=.css)); @:
js_libs:: $(subst $(ROOT)node_modules/,dist/public/libs/,$(JS_LIBS)); @:
php_libs:: $(subst vendor/,dist/vendor/,$(PHP_LIBS)); @:
logo:: $(GENERATED_LOGOS); @:

# Copy over non-compiled, non-PHP sources.
$(filter-out %.php,$(subst src,dist,$(SRC_FILES))):: dist%: src%
	@:
	set -e
	$(call status,cp,$<,$@)
	$(call makedir,$@)
	cp -p $< $@

# Copy over PHP files and check the syntax.
$(filter %.php,$(subst src,dist,$(SRC_FILES))):: dist%: src%
	@:
	set -e
	$(call status,cp,$<,$@)
	$(call makedir,$@)
	cp -p $< $@
	php -l $@ > /dev/null

# Copy Composer libraries to dist/vendor/.
dist/vendor/%:: vendor/%
	@:
	set -e
	$(call status,cp,$<,$@)
	mkdir -p $$(dirname $@)
	cp -Rp $< $@

# Copy over RST sources. Try to find prerequisites from
# 'src/doc/rst/' first and then fall back to './'.
dist/doc/rst/%.rst:: src/doc/rst/%.rst
	@:
	set -e
	$(call status,cp,$<,$@)
	$(call makedir,$@)
	cp -p $< $@

dist/doc/rst/%.rst:: %.rst
	@:
	set -e
	$(call status,cp,$<,$@)
	$(call makedir,$@)
	cp -p $< $@

# Compile RST sources into HTML. Try to find prerequisites
# from 'src/doc/rst/' first and then fall back to './'.
dist/public/doc/html/%.html:: src/doc/rst/%.rst
	@:
	set -e
	$(call status,pandoc,$<,$@)
	$(call makedir,$@)
	pandoc -o $@ -f rst -t html $<

dist/public/doc/html/%.html:: %.rst
	@:
	set -e
	$(call status,pandoc,$<,$@)
	$(call makedir,$@)
	pandoc -o $@ -f rst -t html $<

# Generate JavaScript dependency makefiles.
dep/%/main.js.dep: src/%/main.js
	@:
	set -e
	$(call status,deps-js,$<,$@)
	$(call makedir,$@)

	TARGET="$(subst src,dist/public,$(<))"
	SRC="$(<)"
	DEPS=`npx browserify --list $$SRC | tr '\n' ' ' | sed 's:$(ROOT)::g'`

	# Printf dependency makefile contents.
	printf "$$TARGET:: $$DEPS\n" > $@
	printf "\t@:\n" >> $@
	printf "\t\$$(call status,compile-js,$$SRC,$$TARGET)\n" >> $@
	printf "\t\$$(call makedir,$$TARGET)\n" >> $@
	printf "\tnpx browserify $$SRC -o $$TARGET\n" >> $@

# Generate SCSS dependency makefiles.
dep/%.scss.dep: src/%.scss
	@:
	set -e
	# Don't create deps for partials.
	if [ ! "`basename '$(<)' | cut -c 1`" = "_" ]; then
		$(call status,deps-scss,$<,$@)
		$(call makedir,$@)

		TARGET="$(subst src,dist/public,$(<:.scss=.css))"
		SRC="$(<)"
		DEPS=`./$(SASS_DEP) -l $$SRC $(SASS_IPATHS)|sed 's:$(ROOT)::g'`

		# Printf dependency makefile contents.
		printf "$$TARGET:: $$SRC $$DEPS\n" > $@
		printf "\t@:\n" >> $@
		printf "\t\$$(call status,compile-scss,$$SRC,$$TARGET)\n" >> $@
		printf "\t\$$(call makedir,$$SRC)\n" >> $@

		printf "\tnpx sass $(SASS_FLAGS) $$SRC $$TARGET\n" >> $@
		printf "\tnpx postcss $$TARGET $(POSTCSS_FLAGS)\n" >> $@
	fi

# Copy production node modules to 'dist/public/libs/'.
dist/public/libs/%:: node_modules/%
	@:
	set -e
	mkdir -p $@
	$(call status,cp,$<,$@)
	cp -Rp $</* $@

# Convert the LibreSignage SVG logos to PNG logos of various sizes.
.SECONDEXPANSION:
$(GENERATED_LOGOS): dist/%.png: src/$$(shell printf '$$*\n' | rev | cut -f 2- -d '_' | rev).svg
	@:
	set -e
	. build/scripts/convert_images.sh
	SRC_DIR=`dirname $(@) | sed 's:dist:src:g'`
	DEST_DIR=`dirname $(@)`
	NAME=`basename $(lastword $^)`
	SIZE=`printf "$(@)\n" | rev | cut -f 2 -d '.' | cut -f 1 -d '_' | rev`
	mkdir -p "$$DEST_DIR"
	svg_to_png "$$SRC_DIR" "$$DEST_DIR" "$$NAME" "$$SIZE"


include makefile.common

# Include the dependency makefiles from dep/. If the files don't
# exist, they are built by running the required targets.
ifeq (,$(filter LOC clean realclean configure,$(MAKECMDGOALS)))
include $(subst src,dep,$(SRC_JS:.js=.js.dep))
include $(subst src,dep,$(SRC_SCSS:.scss=.scss.dep))
endif