# This is free and unencumbered software released into the public
# domain. To the extent possible under law, the author of this file
# waives all copyright and related or neighboring rights to it.

$(call include-once.,programs.mk)

NPM ?= npm
NPMROOT ?= $(CURDIR)

npmbindir = $(NPMROOT)/node_modules/.bin
.PRECIOUS: $(npmbindir)/%

npmbin = $(call command-v,$1 $(npmbindir)/$1)

JSTEST ?= $(npmbindir)/jstest
JSHINT ?= $(call npmbin,jshint)

uglifyjs_npm_package := uglify-js

UGLIFY ?= $(call npmbin,uglifyjs)
UGLIFYFLAGS ?= --comments \
               --compress $(UGLIFYCOMPRESSFLAGS) \
               --mangle $(UGLIFYMANGLEFLAGS)

jsstampprefix ?= $(stampprefix)
jsuglyprefix ?= 

JSTESTFLAGS += $(if $(JSTESTFORMAT),--format $(JSTESTFORMAT))
JSTEST_NODE_PATH ?= $(VPATH)
JSTESTENV += $(if $(JSTEST_NODE_PATH),NODE_PATH=$(JSTEST_NODE_PATH))
JSTESTFORMAT ?= spec

jshint-stampify = $(patsubst %.js,$(jsstampprefix)%.js.lint,$1)
jstest-stampify = $(patsubst %.js,$(jsstampprefix)%.js.test,$1)
uglify-stampify = $(patsubst %.js,$(jsuglyprefix)%.min.js,$1)

find-js = $(shell find $1 $(if $2,$2 -o) -type f -name '*.js' -print)

UGLIFY.js = $(UGLIFY) $(UGLIFYFLAGS)
LINT.js = $(JSHINT) $(JSHINTFLAGS)
TEST.js = $(JSTESTENV) $(JSTEST) $(JSTESTFLAGS)

$(jsuglyprefix)/%.min.js: %.js | $(UGLIFY)
	$(MKDIR) $(@D)
	$(UGLIFY.js) < $< > $@

$(jsstampprefix)%.js.lint: %.js | $(JSHINT)
	$(MKDIR) $(@D)
	$(LINT.js) $<
	touch $@

$(jsstampprefix)%.js.test: %.js | $(JSTEST)
	$(MKDIR) $(@D)
	$(call quiet,$(TEST.js) $<,$@)

$(npmbindir)/%:
	$(NPM) install $(firstword $(value $(@F)_npm_package) $(@F))