Pre-process all ES5 builds

packages/firestore/memory/package.json

@@ -2,6 +2,7 @@
   "name": "@firebase/firestore/memory",
   "description": "A memory-only build of the Cloud Firestore JS SDK.",
   "main": "../dist/index.memory.node.cjs.js",
+  "main-esm2017": "../dist/index.memory.node.esm2017.js",
   "browser": "../dist/index.memory.cjs.js",
   "module": "../dist/index.memory.esm.js",
   "esm2017": "../dist/index.memory.esm2017.js",

packages/firestore/package.json

@@ -5,7 +5,7 @@
   "author": "Firebase <[email protected]> (https://firebase.google.com/)",
   "scripts": {
     "prebuild": "tsc -d --downlevelIteration --declarationDir dist/lib --emitDeclarationOnly && tsc -m es2015 --moduleResolution node scripts/*.ts ",
-    "build": "rollup -c",
+    "build": "rollup -c rollup.config.es2017.js && rollup -c rollup.config.es5.js",
     "build:deps": "lerna run --scope @firebase/'{app,firestore}' --include-dependencies build",
     "build:console": "node tools/console.build.js",
     "predev": "yarn prebuild",
@@ -26,6 +26,7 @@
     "prepare": "yarn build"
   },
   "main": "dist/index.node.cjs.js",
+  "main-esm2017": "dist/index.node.esm2017.js",
   "browser": "dist/index.cjs.js",
   "module": "dist/index.esm.js",
   "esm2017": "dist/index.esm2017.js",

packages/firestore/rollup.config.es2017.js

@@ -0,0 +1,148 @@
+/**
+ * @license
+ * Copyright 2018 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as path from 'path';
+
+import json from 'rollup-plugin-json';
+import typescriptPlugin from 'rollup-plugin-typescript2';
+import replace from 'rollup-plugin-replace';
+import copy from 'rollup-plugin-copy-assets';
+import typescript from 'typescript';
+import { terser } from 'rollup-plugin-terser';
+
+import pkg from './package.json';
+import memoryPkg from './memory/package.json';
+
+import {
+  appendPrivatePrefixTransformers,
+  manglePrivatePropertiesOptions,
+  resolveNodeExterns,
+  resolveBrowserExterns
+} from './rollup.shared';
+
+// Firestore is released in a number of different build configurations:
+// - Browser builds that support persistence in ES5 CJS and ES5 ESM formats and
+//   ES2017 in ESM format.
+// - In-memory Browser builds that support persistence in ES5 CJS and ES5 ESM
+//   formats and ES2017 in ESM format.
+// - A NodeJS build that supports persistence (to be used with an IndexedDb
+//   shim)
+// - A in-memory only NodeJS build
+//
+// The in-memory builds are roughly 130 KB smaller, but throw an exception
+// for calls to `enablePersistence()` or `clearPersistence()`.
+//
+// We use two different rollup pipelines to take advantage of tree shaking,
+// as Rollup does not support tree shaking for Typescript classes transpiled
+// down to ES5 (see https://bit.ly/340P23U). The build pipeline in this file
+// produces tree-shaken ES2017 builds that are consumed by the ES5 builds in
+// `rollup.config.es.js`.
+//
+// All browser builds rely on Terser's property name mangling to reduce code
+// size.
+//
+// See https://g3doc/firebase/jscore/g3doc/contributing/builds.md
+// for a description of the various JavaScript formats used in our SDKs.
+
+// MARK: Browser builds
+
+const browserBuildPlugins = [
+  typescriptPlugin({
+    typescript,
+    tsconfigOverride: {
+      compilerOptions: {
+        target: 'es2017'
+      }
+    },
+    clean: true,
+    transformers: appendPrivatePrefixTransformers
+  }),
+  json({ preferConst: true }),
+  terser(manglePrivatePropertiesOptions)
+];
+
+const browserBuilds = [
+  // Persistence build
+  {
+    input: 'index.ts',
+    output: {
+      file: pkg.esm2017,
+      format: 'es',
+      sourcemap: true
+    },
+    plugins: browserBuildPlugins,
+    external: resolveBrowserExterns
+  },
+  // Memory-only build
+  {
+    input: 'index.memory.ts',
+    output: {
+      file: path.resolve('./memory', memoryPkg.esm2017),
+      format: 'es',
+      sourcemap: true
+    },
+    plugins: browserBuildPlugins,
+    external: resolveBrowserExterns
+  }
+];
+
+// MARK: Node builds
+
+const nodeBuildPlugins = [
+  typescriptPlugin({
+    typescript,
+    tsconfigOverride: {
+      compilerOptions: {
+        target: 'es2017'
+      }
+    },
+    clean: true
+  }),
+  json(),
+  // Needed as we also use the *.proto files
+  copy({
+    assets: ['./src/protos']
+  }),
+  replace({
+    'process.env.FIRESTORE_PROTO_ROOT': JSON.stringify('src/protos')
+  })
+];
+
+const nodeBuilds = [
+  // Persistence build
+  {
+    input: 'index.node.ts',
+    output: [{ file: pkg['main-esm2017'], format: 'es', sourcemap: true }],
+    plugins: nodeBuildPlugins,
+    external: resolveNodeExterns
+  },
+  // Memory-only build
+  {
+    input: 'index.node.memory.ts',
+    output: [
+      {
+        file: path.resolve('./memory', memoryPkg['main-esm2017']),
+        format: 'es',
+        sourcemap: true
+      }
+    ],
+    plugins: nodeBuildPlugins,
+    external: resolveNodeExterns
+  }
+];
+
+export default [...browserBuilds, ...nodeBuilds];

packages/firestore/rollup.config.es5.js

@@ -0,0 +1,119 @@
+/**
+ * @license
+ * Copyright 2018 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as path from 'path';
+
+import typescriptPlugin from 'rollup-plugin-typescript2';
+import sourcemaps from 'rollup-plugin-sourcemaps';
+import typescript from 'typescript';
+import { terser } from 'rollup-plugin-terser';
+import { resolveNodeExterns, resolveBrowserExterns } from './rollup.shared';
+
+import pkg from './package.json';
+import memoryPkg from './memory/package.json';
+
+// This file defines the second rollup pipeline and transpiles the ES2017 SDK
+// into ES5 code. By splitting the build process into two independent build
+// pipelines, we take advantage of tree shaking in ES2017 builds even for
+// language levels that don't support tree shaking.
+
+const browserPlugins = [
+  typescriptPlugin({
+    typescript,
+    compilerOptions: {
+      allowJs: true
+    },
+    include: ['dist/*.js']
+  }),
+  terser({
+    output: {
+      comments: 'all',
+      beautify: true
+    },
+    mangle: true
+  }),
+  sourcemaps()
+];
+
+const nodePlugins = [
+  typescriptPlugin({
+    typescript,
+    compilerOptions: {
+      allowJs: true
+    },
+    include: ['dist/*.js']
+  }),
+  sourcemaps()
+];
+
+const browserBuilds = [
+  {
+    input: pkg.esm2017,
+    output: { file: pkg.module, format: 'es', sourcemap: true },
+    plugins: browserPlugins,
+    external: resolveBrowserExterns
+  },
+  {
+    input: path.resolve('./memory', memoryPkg.esm2017),
+    output: {
+      file: path.resolve('./memory', memoryPkg.module),
+      format: 'es',
+      sourcemap: true
+    },
+    plugins: browserPlugins,
+    external: resolveBrowserExterns
+  },
+  {
+    input: pkg.esm2017,
+    output: { file: pkg.browser, format: 'cjs', sourcemap: true },
+    plugins: browserPlugins,
+    external: resolveBrowserExterns
+  },
+  {
+    input: path.resolve('./memory', memoryPkg.esm2017),
+    output: {
+      file: path.resolve('./memory', memoryPkg.browser),
+      format: 'cjs',
+      sourcemap: true
+    },
+    plugins: browserPlugins,
+    external: resolveBrowserExterns
+  }
+];
+
+const nodeBuilds = [
+  {
+    input: pkg['main-esm2017'],
+    output: [{ file: pkg.main, format: 'cjs', sourcemap: true }],
+    plugins: nodePlugins,
+    external: resolveNodeExterns
+  },
+  {
+    input: path.resolve('./memory', memoryPkg['main-esm2017']),
+    output: [
+      {
+        file: path.resolve('./memory', memoryPkg.main),
+        format: 'cjs',
+        sourcemap: true
+      }
+    ],
+    plugins: nodePlugins,
+    external: resolveNodeExterns
+  }
+];
+
+export default [...browserBuilds, ...nodeBuilds];