build(): use rollup to create ESM and CommonJS bundles

.babelrc

@@ -1,26 +1,7 @@
 {
-  "env": {
-    "test": {
-      "presets": [
-        ["@babel/env"]
-      ],
-      "plugins": ["rewire"],
-      "sourceMaps": "inline"
-    },
-      "es5": {
-        "presets": [
-          ["@babel/env"]
-        ],
-        "plugins": [
-          "add-module-exports"
-        ]
-      },
-      "es-modules": {
-        "presets": [
-          ["@babel/env", {
-            "modules": false
-          }]
-        ]
-      }
-  }
+  "presets": [
+    ["@babel/env"]
+  ],
+  "plugins": ["rewire"],
+  "sourceMaps": "inline"
 }

lib/index.js

@@ -0,0 +1,6 @@
+export { default as createHttpClient } from './create-http-client'
+export { default as createRequestConfig } from './create-request-config'
+export { default as enforceObjPath } from './enforce-obj-path'
+export { default as freezeSys } from './freeze-sys'
+export { default as getUserAgentHeader } from './get-user-agent'
+export { default as toPlainObject } from './to-plain-object'

package.json

@@ -3,9 +3,9 @@
   "version": "0.0.1-determined-by-semantic-release",
   "description": "Core modules for the Contentful JS SDKs",
   "homepage": "https://www.contentful.com/developers/docs/javascript/",
-  "main": "index.js",
-  "module": "index.es-modules.js",
-  "jsnext:main": "index.es-modules.js",
+  "main": "dist/index.js",
+  "module": "dist/index.es-modules.js",
+  "jsnext:main": "dist/index.es-modules.js",
   "browser": {
     "os": false
   },
@@ -17,16 +17,14 @@
   "license": "MIT",
   "scripts": {
     "clean": "rimraf coverage && rimraf dist",
-    "build": "npm run clean && npm run build:es5 && npm run build:es-modules",
-    "build:es5": "BABEL_ENV=es5 babel lib -d dist/es5",
-    "build:es-modules": "BABEL_ENV=es-modules babel lib -d dist/es-modules",
+    "build": "npm run clean && rollup -c",
     "lint": "eslint lib test",
     "pretest": "npm run lint",
     "test": "npm run test:cover",
     "test:ci-emulate": "trevor",
-    "test:cover": "BABEL_ENV=test babel-node ./node_modules/istanbul/lib/cli.js cover ./test/runner | tap-spec",
-    "test:unit": "BABEL_ENV=test babel-node ./test/runner | tap-spec",
-    "test:debug": "BABEL_ENV=test babel-node debug ./test/runner",
+    "test:cover": "babel-node ./node_modules/istanbul/lib/cli.js cover ./test/runner | tap-spec",
+    "test:unit": "babel-node ./test/runner | tap-spec",
+    "test:debug": "babel-node debug ./test/runner",
     "browser-coverage": "npm run test:cover && opener coverage/lcov-report/index.html",
     "prepublish": "in-publish && npm run build || not-in-publish",
     "semantic-release": "semantic-release",
@@ -35,8 +33,6 @@
   },
   "files": [
     "dist",
-    "index.js",
-    "index.es-modules.js",
     "bin"
   ],
   "engines": {
@@ -54,7 +50,6 @@
     "@babel/register": "^7.0.0",
     "axios": "^0.19.0",
     "axios-mock-adapter": "^1.15.0",
-    "babel-plugin-add-module-exports": "^1.0.0",
     "babel-plugin-rewire": "^1.2.0",
     "blue-tape": "^1.0.0",
     "codecov": "^3.0.4",
@@ -74,6 +69,8 @@
     "opener": "^1.4.1",
     "require-all": "^3.0.0",
     "rimraf": "^2.6.2",
+    "rollup": "^1.0.2",
+    "rollup-plugin-babel": "^4.2.0",
     "semantic-release": "^15.8.0",
     "sinon": "^7.3.2",
     "tap-spec": "^5.0.0",

rollup.config.js

@@ -0,0 +1,28 @@
+import pkg from './package.json';
+import babel from 'rollup-plugin-babel';
+
+export default [
+  {
+    input: 'lib/index.js',
+    output: [
+      { file: pkg.module, format: 'esm' },
+      { file: pkg.main, format: 'cjs' },
+    ],
+    plugins: [
+      babel({
+        babelrc: false,
+        presets: [
+          ['@babel/env', {
+            modules: false
+          }]
+        ]
+      })
+    ],
+    external: [
+      ...Object.keys(pkg.dependencies || []),
+      'os',
+      'lodash/isPlainObject',
+      'lodash/cloneDeep'
+    ]
+  }
+];