-JSTEST ?= node_modules/.bin/jstest
-JSHINT ?= node_modules/.bin/jshint
-UGLIFY ?= node_modules/.bin/uglifyjs
-SOURCES = string-lerp.js
-MINIFIED = $(SOURCES:.js=.min.js)
-
-TESTS = $(wildcard tests/*.js);
-LINT_TARGETS = $(addprefix build/stamp/,$(addsuffix .lint,$(SOURCES)))
-TEST_TARGETS = $(addprefix build/stamp/,$(addsuffix .test,$(SOURCES)))
-
-.PHONY: all check lint test
-
-all: $(MINIFIED)
-
-%.min.js: %.js $(UGLIFY)
- $(UGLIFY) -m < $< > $@
-
-build:
- mkdir -p build/stamp build/dist
-
-build/stamp/%.lint: % build
+PKGNAME := string-lerp
+
+fallback = $(firstword $(shell command -v $(1)) $(2))
+
+git = $(shell GIT_DIR=$(firstword $(2) $(srcdir) .)/.git $(GIT) $(1))
+git_ls-tree = $(call git,ls-tree -r --name-only $(1),$(2))
+git_tag = $(call git,name-rev --tags --name-only $(call git,rev-parse $(1),$(2)),$(2))
+
+GIT ?= git
+NPM ?= npm
+NPMBINDIR := ./node_modules/.bin
+JSTEST ?= $(NPMBINDIR)/jstest
+JSHINT ?= $(call fallback,jshint,$(NPMBINDIR)/jshint)
+UGLIFY ?= $(call fallback,uglifyjs,$(NPMBINDIR)/uglifyjs)
+SOURCES := string-lerp.js
+UGLIFIED = $(SOURCES:.js=.min.js)
+
+TESTS = $(wildcard tests/*.js)
+LINT_TARGETS = $(patsubst %.js,build/stamp/%.lint,$(SOURCES))
+TEST_TARGETS = $(patsubst %.js,build/stamp/%.test,$(SOURCES)) \
+ $(patsubst tests/%.js,build/stamp/%.test,$(TESTS))
+
+.PHONY: all check lint test ugly dist clean distclean install
+
+all:
+ @echo "Interesting targets:"
+ @echo " lint - validate source (with jshint)"
+ @echo " test - run tests (with jstest)"
+ @echo " ugly - generate minified/mangled source files"
+ @echo " dist - generate redistributables (if git tagged)"
+ @echo
+ @echo "(Running these may download packages from npm.)"
+ @echo
+
+%.min.js: %.js | $(UGLIFY)
+ $(UGLIFY) --comments -m < $< > $@
+
+build/stamp/%.lint: %.js | $(JSHINT)