Add build system

Author: mjackson

package.json

@@ -3,36 +3,47 @@
   "version": "4.0.0-pre",
   "description": "A router for React.js",
   "repository": "ReactJSTraining/react-router",
-  "scripts": {
-    "start": "cd docs && npm start",
-    "lint": "eslint modules"
-  },
+  "license": "MIT",
   "authors": [
     "Michael Jackson",
     "Ryan Florence"
   ],
-  "license": "MIT",
-  "peerDependencies": {
-    "react": "^15.1.0",
-    "react-dom": "^15.1.0"
+  "scripts": {
+    "start": "cd docs && npm start",
+    "build-lib": "rimraf lib && babel ./modules -d lib --ignore '__tests__'",
+    "build-umd": "webpack modules/index.js umd/react-router.js",
+    "build-min": "webpack -p modules/index.js umd/react-router.min.js",
+    "build": "node ./scripts/build.js",
+    "prepublish": "node ./scripts/build.js",
+    "lint": "eslint modules"
   },
   "dependencies": {
     "history": "^3.0.0",
     "path-to-regexp": "^1.5.0"
   },
+  "peerDependencies": {
+    "react": "^15.1.0",
+    "react-dom": "^15.1.0"
+  },
   "devDependencies": {
+    "babel-cli": "^6.10.1",
     "babel-core": "^6.9.1",
     "babel-eslint": "^6.0.4",
+    "babel-loader": "^6.2.4",
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-react": "^6.5.0",
     "babel-preset-stage-1": "^6.5.0",
     "eslint": "^2.12.0",
     "eslint-plugin-import": "^1.8.1",
     "eslint-plugin-react": "^5.1.1",
+    "gzip-size": "^3.0.0",
+    "in-publish": "^2.0.0",
+    "pretty-bytes": "^3.0.1",
     "react": "^15.1.0",
     "react-dom": "^15.1.0",
     "react-redux": "^4.4.5",
     "redux": "^3.5.2",
+    "rimraf": "^2.5.2",
     "webpack": "^1.13.1",
     "webpack-dev-server": "^1.14.1"
   },

scripts/build.js

@@ -0,0 +1,25 @@
+const readFileSync = require('fs').readFileSync
+const execSync = require('child_process').execSync
+const inInstall = require('in-publish').inInstall
+const prettyBytes = require('pretty-bytes')
+const gzipSize = require('gzip-size')
+
+if (inInstall())
+  process.exit(0)
+
+const exec = (command, env) =>
+  execSync(command, { stdio: 'inherit', env })
+
+const webpackEnv = Object.assign({}, process.env, {
+  NODE_ENV: 'production'
+})
+
+exec('npm run build-lib')
+exec('npm run build-umd', webpackEnv)
+exec('npm run build-min', webpackEnv)
+
+console.log(
+  '\ngzipped, the UMD build is ' + prettyBytes(
+    gzipSize.sync(readFileSync('umd/react-router.min.js'))
+  )
+)

webpack.config.js

@@ -0,0 +1,22 @@
+const webpack = require('webpack')
+
+module.exports = {
+
+  output: {
+    library: 'ReactRouter',
+    libraryTarget: 'umd'
+  },
+
+  module: {
+    loaders: [
+      { test: /\.js$/, exclude: /node_modules/, loader: 'babel' }
+    ]
+  },
+
+  plugins: [
+    new webpack.DefinePlugin({
+      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV || 'development')
+    })
+  ]
+
+}