chore(build): add rollup to bundle external deps

.babelrc

@@ -1,14 +1,15 @@
 {
-  "presets": [["es2015", {"modules": false}], "stage-2"],
-  "plugins": [
-    "transform-es2015-modules-umd",
-  ],
-  "moduleId": "matchSorter",
+  "presets": ["stage-2"],
   "env": {
+    "development": {
+      "presets": ["es2015"],
+    },
+    "rollup": {
+      "presets": [["es2015", {"modules": false}]],
+    },
     "test": {
-      "plugins": [
-        "istanbul"
-      ]
+      "presets": ["es2015"],
+      "plugins": ["istanbul"]
     }
   }
 }

package-scripts.js

@@ -15,8 +15,20 @@ module.exports = {
       },
     },
     build: {
-      description: 'delete the dist directory and run babel to build the files',
-      script: 'rimraf dist && babel --copy-files --out-dir dist --ignore *.test.js src',
+      description: 'delete the dist directory and run all builds',
+      default: 'rimraf dist && p-s -p build.main,build.umd,build.umd.min',
+      main: {
+        description: 'transpile all source with babel',
+        script: 'babel --copy-files --out-dir dist/cjs --ignore *.test.js src',
+      },
+      umd: {
+        description: 'run the build with rollup (uses rollup.config.js)',
+        script: 'cross-env rollup --config',
+        min: {
+          description: 'run the rollup build with sourcemaps',
+          script: 'cross-env MINIFY=true rollup --config --sourcemap',
+        },
+      },
     },
     lint: {
       description: 'lint the entire project',

package.json

@@ -2,7 +2,7 @@
   "name": "match-sorter",
   "version": "0.0.0-semantically-released",
   "description": "Simple, expected, and deterministic best-match sorting of an array in JavaScript",
-  "main": "dist/index.js",
+  "main": "dist/cjs/index.js",
   "scripts": {
     "start": "package-scripts",
     "test": "package-scripts test"
@@ -16,24 +16,28 @@
   "dependencies": {},
   "devDependencies": {
     "all-contributors-cli": "^3.0.0",
-    "ava": "^0.15.2",
+    "ava": "^0.16.0",
     "babel-cli": "^6.7.7",
-    "babel-plugin-istanbul": "^1.0.3",
-    "babel-plugin-transform-es2015-modules-umd": "6.12.0",
+    "babel-plugin-istanbul": "2.0.0",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-stage-2": "^6.5.0",
     "babel-register": "^6.7.2",
     "codecov": "^1.0.1",
     "commitizen": "^2.8.6",
-    "cross-env": "2.0.0",
+    "cross-env": "^2.0.0",
     "cz-conventional-changelog": "^1.2.0",
     "eslint": "^3.1.1",
     "eslint-config-kentcdodds": "^10.0.1",
     "ghooks": "^1.3.2",
-    "nyc": "^7.0.0",
+    "nyc": "8.1.0",
     "opt-cli": "^1.4.2",
     "p-s": "^2.3.0",
     "rimraf": "^2.5.4",
+    "rollup": "0.34.10",
+    "rollup-plugin-babel": "2.6.1",
+    "rollup-plugin-commonjs": "3.3.1",
+    "rollup-plugin-node-resolve": "2.0.0",
+    "rollup-plugin-uglify": "1.0.1",
     "semantic-release": "^4.3.5",
     "validate-commit-msg": "^2.8.0"
   },

rollup.config.js

@@ -0,0 +1,22 @@
+import {rollup} from 'rollup' // eslint-disable-line
+import rollupBabel from 'rollup-plugin-babel'
+import commonjs from 'rollup-plugin-commonjs'
+import nodeResolve from 'rollup-plugin-node-resolve'
+import uglify from 'rollup-plugin-uglify'
+
+process.env.BABEL_ENV = 'rollup' // so babel will be configured to not transpile modules
+const filename = process.env.MINIFY ? 'match-sorter.min.js' : 'match-sorter.js'
+
+export default {
+  entry: 'src/index.js',
+  dest: `dist/umd/${filename}`,
+  format: 'umd',
+  moduleName: 'matchSorter',
+  plugins: [
+    nodeResolve({jsnext: true, main: true}),
+    commonjs({include: 'node_modules/**'}),
+    rollupBabel({exclude: 'node_modules/**'}),
+    process.env.MINIFY ? uglify() : null,
+  ].filter(i => !!i),
+  exports: 'named',
+}