fix makefile

Author: jcouyang

Makefile

@@ -1,14 +1,15 @@
 docsdir = ./docs/**/*
-browserify = ./node_modules/.bin/browserify
-watchify = ./node_modules/.bin/watchify
-uglify = ./node_modules/.bin/uglifyjs
-mocha = ./node_modules/.bin/mocha
-tsc = ./node_modules/.bin/tsc
+bin = ./node_modules/.bin
 
 test: unit integrate
 
-build:
-	${tsc}
+build: lib/**/*.js
+
+lib/**/*.js: src/**/*.ts
+	$(bin)/tsc
+
+lib/%.js: src/%.ts
+	$(bin)/tsc
 
 all: test dist
 
@@ -18,24 +19,24 @@ unit: build
 	yarn test
 
 integrate: build test/*.js docs/src/main/tut/examples/example.js
-	${mocha} test/test.js
+	$(bin)/mocha test/test.js
 
 docs/src/main/tut/examples/example.js: docs/src/main/tut/examples/example.tsx
-	$(browserify) -p [tsify -p tsconfig.examples.json] docs/src/main/tut/examples/example.tsx -o docs/src/main/tut/examples/example.js
+	$(bin)/browserify -p [tsify -p tsconfig.examples.json] docs/src/main/tut/examples/example.tsx -o docs/src/main/tut/examples/example.js
 
 watch/example: docs/src/main/tut/examples/example.tsx
-	$(watchify) -p [tsify -p tsconfig.examples.json] -t envify docs/src/main/tut/examples/example.tsx -dv -o docs/src/main/tut/examples/example.js
+	$(bin)/watchify -p [tsify -p tsconfig.examples.json] -t envify docs/src/main/tut/examples/example.tsx -dv -o docs/src/main/tut/examples/example.js
 
 dist: dist/xreact.min.js dist/xreact-most.min.js dist/xreact-rx.min.js
 
 dist/xreact.js: lib/index.js dist/xreact-most.js dist/xreact-rx.js
-	env NODE_ENV=production $(browserify) -t browserify-shim -t envify -x ./lib/xs $< -s xreact -o $@
+	env NODE_ENV=production $(bin)/browserify -t browserify-shim -t envify -x ./lib/xs $< -s xreact -o $@
 
 dist/xreact-%.js:  lib/xs/%.js
-	env NODE_ENV=production $(browserify) -t browserify-shim -t envify -r ./lib/xs $< -o $@
+	env NODE_ENV=production $(bin)/browserify -t browserify-shim -t envify -r ./lib/xs $< -o $@
 
 dist/%.min.js: dist/%.js
-	env NODE_ENV=production $(uglify) -c dead_code $(basename $(basename $@)).js -o $@
+	env NODE_ENV=production $(bin)/uglifyjs -c dead_code $(basename $(basename $@)).js -o $@
 
 docs: $(docsdir)
 	sbt "project docs" makeMicrosite