Move babel-preset-env-standalone to the monorepo. (#6438)

.babelignore

@@ -2,3 +2,6 @@
 packages/*/test/fixtures
 packages/*/lib
 packages/babel-standalone/babel.js
+experimental/*/test/fixtures
+experimental/*/lib
+experimental/babel-preset-env-standalone/babel-preset-env.js

.eslintignore

@@ -18,6 +18,8 @@ experimental/*/test/fixtures
 experimental/*/test/tmp
 experimental/babel-preset-env/data
 experimental/babel-preset-env/test/debug-fixtures
+experimental/babel-preset-env-standalone/babel-preset-env.js
+experimental/babel-preset-env-standalone/babel-preset-env.min.js
 packages/babel-standalone/babel.js
 packages/babel-standalone/babel.min.js
 packages/babylon/build

.gitignore

@@ -34,6 +34,10 @@ package-lock.json
 /babel.sublime-workspace
 packages/babel-standalone/babel.js
 packages/babel-standalone/babel.min.js
+/experimental/*/node_modules
+/experimental/*/lib
+experimental/babel-preset-env-standalone/babel-preset-env.js
+experimental/babel-preset-env-standalone/babel-preset-env.min.js
 /codemods/*/lib
 /codemods/*/node_modules
 /packages/babylon/build

Gulpfile.js

@@ -3,9 +3,6 @@
 const plumber = require("gulp-plumber");
 const through = require("through2");
 const chalk = require("chalk");
-const pump = require("pump");
-const uglify = require("gulp-uglify");
-const rename = require("gulp-rename");
 const newer = require("gulp-newer");
 const babel = require("gulp-babel");
 const watch = require("gulp-watch");
@@ -13,11 +10,10 @@ const gutil = require("gulp-util");
 const filter = require("gulp-filter");
 const gulp = require("gulp");
 const path = require("path");
-const merge = require("merge-stream");
-const RootMostResolvePlugin = require("webpack-dependency-suite")
-  .RootMostResolvePlugin;
 const webpack = require("webpack");
-const webpackStream = require("webpack-stream");
+const merge = require("merge-stream");
+const registerStandalonePackageTask = require("./scripts/gulp-tasks")
+  .registerStandalonePackageTask;
 
 const sources = ["codemods", "packages", "experimental"];
 
@@ -81,114 +77,40 @@ gulp.task("watch", ["build"], function() {
   });
 });
 
-gulp.task("build-babel-standalone", cb => {
-  pump(
-    [
-      gulp.src(__dirname + "/packages/babel-standalone/src/index.js"),
-      webpackBuild(),
-      gulp.dest(__dirname + "/packages/babel-standalone"),
-      uglify(),
-      rename({ extname: ".min.js" }),
-      gulp.dest(__dirname + "/packages/babel-standalone"),
-    ],
-    cb
-  );
-});
+registerStandalonePackageTask(
+  gulp,
+  "babel",
+  "Babel",
+  path.join(__dirname, "packages"),
+  require("./packages/babel-core/package.json").version
+);
 
-function webpackBuild() {
-  let version = require("./packages/babel-core/package.json").version;
+const presetEnvWebpackPlugins = [
+  new webpack.NormalModuleReplacementPlugin(
+    /\.\/available-plugins/,
+    require.resolve(
+      path.join(
+        __dirname,
+        "./experimental/babel-preset-env-standalone/src/available-plugins"
+      )
+    )
+  ),
+  new webpack.NormalModuleReplacementPlugin(
+    /caniuse-lite\/data\/regions\/.+/,
+    require.resolve(
+      path.join(
+        __dirname,
+        "./experimental/babel-preset-env-standalone/src/caniuse-lite-regions"
+      )
+    )
+  ),
+];
 
-  // If this build is part of a pull request, include the pull request number in
-  // the version number.
-  if (process.env.CIRCLE_PR_NUMBER) {
-    version += "+pr." + process.env.CIRCLE_PR_NUMBER;
-  }
-
-  const config = {
-    module: {
-      rules: [
-        {
-          test: /\.js$/,
-          include: /node_modules/,
-          loader: "babel-loader",
-          options: {
-            // Some of the node_modules may have their own "babel" section in
-            // their project.json (or a ".babelrc" file). We need to ignore
-            // those as we're using our own Babel options.
-            babelrc: false,
-            presets: [
-              [
-                "@babel/env",
-                {
-                  loose: true,
-                  exclude: ["transform-typeof-symbol"],
-                },
-              ],
-            ],
-          },
-        },
-        {
-          test: /\.js$/,
-          exclude: /node_modules/,
-          loader: "babel-loader",
-          options: {
-            // Some of the node_modules may have their own "babel" section in
-            // their project.json (or a ".babelrc" file). We need to ignore
-            // those as we're using our own Babel options.
-            babelrc: false,
-            presets: [
-              [
-                "@babel/env",
-                {
-                  loose: true,
-                  exclude: ["transform-typeof-symbol"],
-                },
-              ],
-              ["@babel/stage-0", { loose: true }],
-            ],
-          },
-        },
-      ],
-      // babylon is already bundled and does not require parsing
-      noParse: [/babylon\/lib/],
-    },
-    node: {
-      // Mock Node.js modules that Babel require()s but that we don't
-      // particularly care about.
-      fs: "empty",
-      module: "empty",
-      net: "empty",
-    },
-    output: {
-      filename: "babel.js",
-      library: "Babel",
-      libraryTarget: "umd",
-    },
-    plugins: [
-      new webpack.DefinePlugin({
-        "process.env.NODE_ENV": '"production"',
-        BABEL_VERSION: JSON.stringify(version),
-        VERSION: JSON.stringify(version),
-      }),
-      /*new webpack.NormalModuleReplacementPlugin(
-        /..\/..\/package/,
-        "../../../../src/babel-package-shim"
-      ),*/
-      new webpack.optimize.ModuleConcatenationPlugin(),
-    ],
-    resolve: {
-      plugins: [
-        // Dedupe packages that are used across multiple plugins.
-        // This replaces DedupePlugin from Webpack 1.x
-        new RootMostResolvePlugin(__dirname, true),
-      ],
-    },
-  };
-
-  return webpackStream(config, webpack);
-  // To write JSON for debugging:
-  /*return webpackStream(config, webpack, (err, stats) => {
-    require('gulp-util').log(stats.toString({colors: true}));
-    require('fs').writeFileSync('webpack-debug.json', JSON.stringify(stats.toJson()));
-  });*/
-}
+registerStandalonePackageTask(
+  gulp,
+  "babel-preset-env",
+  "babelPresetEnv",
+  path.join(__dirname, "experimental"),
+  require("./experimental/babel-preset-env/package.json").version,
+  presetEnvWebpackPlugins
+);

Makefile

@@ -18,6 +18,7 @@ build: clean
 	./node_modules/.bin/gulp build
 ifneq ("$(BABEL_ENV)", "cov")
 	make build-standalone
+	make build-preset-env-standalone
 endif
 
 build-babylon:
@@ -27,6 +28,9 @@ build-babylon:
 build-standalone:
 	./node_modules/.bin/gulp build-babel-standalone
 
+build-preset-env-standalone:
+	./node_modules/.bin/gulp build-babel-preset-env-standalone
+
 build-dist: build
 	cd packages/babel-polyfill; \
 	scripts/build-dist.sh

circle.yml

@@ -2,6 +2,8 @@ general:
   artifacts:
     - "packages/babel-standalone/babel.js"
     - "packages/babel-standalone/babel.min.js"
+    - "experimental/babel-preset-env-standalone/babel-preset-env.js"
+    - "experimental/babel-preset-env-standalone/babel-preset-env.min.js"
 
 machine:
   node:
@@ -25,3 +27,4 @@ test:
     # data for a JS file that's several megabytes large is bound to fail. Here,
     # we just run the babel-standalone test separately.
     - ./node_modules/mocha/bin/_mocha packages/babel-standalone/test/ --opts test/mocha.opts
+    - ./node_modules/mocha/bin/_mocha experimental/babel-preset-env-standalone/test/ --opts test/mocha.opts

experimental/babel-preset-env-standalone/README.md

@@ -0,0 +1,36 @@
+@babel/preset-env-standalone
+=================
+
+@babel/preset-env-standalone is a standalone build of [@babel/preset-env](https://babeljs.io/docs/plugins/preset-env) for use in non-Node.js environments, including browsers.
+
+Installation
+============
+
+There are several ways to use @babel/preset-env-standalone. Pick whichever one you like:
+
+- Use it via UNPKG: https://unpkg.com/@babel/preset-env-standalone@7/babel-preset-env.min.js. This is a simple way to embed it on a webpage without having to do any other setup.
+- Install via NPM: `npm install --save @babel/preset-env-standalone`
+- Manually grab `babel-preset-env.js` and/or `babel-preset-env.min.js`:
+  * Download archived source code from the [GitHub releases page](https://github.com/babel/babel/releases).
+  * Unpack it.
+  * Grab `babel-preset-env.js` and/or `babel-preset-env.min.js` from the `experimental/babel-preset-env-standalone`.
+
+Usage
+=====
+
+Load `babel-preset-env.js` or `babel-preset-env.min.js` in your environment, **along with babel-standalone**. This is important: You need to load Babel too! It will be registered as an available preset of the @babel/standalone.
+
+Then, just use it like any other preset:
+
+```js
+Babel.transform(code, {
+  presets: [
+    ["@babel/preset-env", {
+      "targets": {
+        "browsers": "last 1 safari version"
+      },
+      useBuiltIns: "usage"
+    }]
+  ]
+});
+```

experimental/babel-preset-env-standalone/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "@babel/preset-env-standalone",
+  "version": "7.0.0-beta.5",
+  "description": "Standalone build of babel-prest-env for use in non-Node.js environments.",
+  "main": "babel-preset-env.js",
+  "files": [
+    "babel-preset-env.js",
+    "babel-preset-env.min.js",
+    "src"
+  ],
+  "devDependencies": {
+    "@babel/plugin-transform-new-target": "7.0.0-beta.5",
+    "@babel/preset-env": "7.0.0-beta.5",
+    "@babel/standalone": "7.0.0-beta.5",
+    "mock-require": "^2.0.2"
+  },
+  "keywords": [
+    "babel",
+    "babel-preset-env",
+    "babeljs",
+    "6to5",
+    "transpile",
+    "preset",
+    "standalone",
+    "transpiler"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/babel/babel/issues"
+  },
+  "homepage": "https://github.com/babel/babel/packages/babel-preset-env-standalone#readme",
+  "jest": {
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "babel-preset-env.js"
+    ]
+  }
+}

experimental/babel-preset-env-standalone/src/available-plugins.js

@@ -0,0 +1,13 @@
+import { availablePlugins, registerPlugin } from "@babel/standalone";
+
+const notIncludedPlugins = {
+  "transform-new-target": require("@babel/plugin-transform-new-target"),
+};
+
+Object.keys(notIncludedPlugins).forEach(pluginName => {
+  if (!availablePlugins[pluginName]) {
+    registerPlugin(pluginName, notIncludedPlugins[pluginName]);
+  }
+});
+
+export default availablePlugins;

experimental/babel-preset-env-standalone/src/caniuse-lite-regions.js

@@ -0,0 +1 @@
+module.exports = {};

experimental/babel-preset-env-standalone/src/index.js

@@ -0,0 +1,8 @@
+/* global VERSION */
+
+import { registerPreset } from "@babel/standalone";
+import babelPresetEnv from "@babel/preset-env";
+
+registerPreset("env", babelPresetEnv);
+
+export const version = VERSION;

experimental/babel-preset-env-standalone/test/babel-preset-env.js

@@ -0,0 +1,57 @@
+const assert = require("assert");
+const mock = require("mock-require");
+const Babel = require("@babel/standalone/babel");
+mock("Babel", Babel);
+require("../babel-preset-env");
+
+describe("babel-preset-env-standalone", () => {
+  it("works w/o targets", () => {
+    const output = Babel.transform("const a = 1;", {
+      presets: ["env"],
+    }).code;
+    assert.equal(output, "var a = 1;");
+  });
+
+  it("doesn't transpile `const` with chrome 60", () => {
+    const output = Babel.transform("const a = 1;", {
+      presets: [
+        [
+          "env",
+          {
+            targets: {
+              chrome: 60,
+            },
+          },
+        ],
+      ],
+    }).code;
+    assert.equal(output, "const a = 1;");
+  });
+
+  it("transpiles `const` with chrome 60 and preset-es2015", () => {
+    const output = Babel.transform("const a = 1;", {
+      presets: [
+        [
+          "env",
+          {
+            targets: {
+              chrome: 60,
+            },
+          },
+        ],
+        "es2015",
+      ],
+    }).code;
+    assert.equal(output, "var a = 1;");
+  });
+
+  it("uses transform-new-targets plugin", () => {
+    const output = Babel.transform("function Foo() {new.target}", {
+      presets: ["env"],
+    }).code;
+    assert.equal(
+      output,
+      "function Foo() {\n  this instanceof Foo ? this.constructor : void 0;\n}",
+    );
+  });
+});

scripts/_get-test-directories.sh

@@ -11,7 +11,7 @@ for source in "${sources[@]}"; do
       continue
     fi
     # Exclude babel-standalone from coverage runs
-    if [ "$TEST_TYPE" = "cov" ] && [ `basename $f` = 'babel-standalone' ]; then
+    if [ "$TEST_TYPE" = "cov" ] && [[ `basename $f` = 'babel-standalone' || `basename $f` = 'babel-preset-env-standalone' ]]; then
       continue
     fi
 

scripts/gulp-tasks.js

@@ -0,0 +1,164 @@
+"use strict";
+
+/**
+ * This file contains the Gulp tasks for babel-standalone. Note that
+ * babel-standalone is compiled using Webpack, and performs its own Babel
+ * compilation of all the JavaScript files. This is because it targets web
+ * browsers, so more transforms are needed than the regular Babel builds that
+ * only target Node.js.
+ *
+ * The tasks in this file are designed to be reusable, so that they can be used
+ * to make standalone builds of other Babel plugins/presets (such as babel-minify)
+ */
+
+const path = require("path");
+const pump = require("pump");
+const rename = require("gulp-rename");
+const RootMostResolvePlugin = require("webpack-dependency-suite")
+  .RootMostResolvePlugin;
+const webpack = require("webpack");
+const webpackStream = require("webpack-stream");
+const uglify = require("gulp-uglify");
+
+function webpackBuild(opts) {
+  const plugins = opts.plugins || [];
+  let babelVersion = require("../packages/babel-core/package.json").version;
+  let version = opts.version || babelVersion;
+  // If this build is part of a pull request, include the pull request number in
+  // the version number.
+  if (process.env.CIRCLE_PR_NUMBER) {
+    const prVersion = "+pr." + process.env.CIRCLE_PR_NUMBER;
+    babelVersion += prVersion;
+    version += prVersion;
+  }
+
+  const config = {
+    module: {
+      rules: [
+        {
+          test: /\.js$/,
+          include: /node_modules/,
+          loader: "babel-loader",
+          options: {
+            // Some of the node_modules may have their own "babel" section in
+            // their project.json (or a ".babelrc" file). We need to ignore
+            // those as we're using our own Babel options.
+            babelrc: false,
+            presets: [
+              [
+                "@babel/env",
+                {
+                  loose: true,
+                  exclude: ["transform-typeof-symbol"],
+                },
+              ],
+            ],
+          },
+        },
+        {
+          test: /\.js$/,
+          exclude: /node_modules/,
+          loader: "babel-loader",
+          options: {
+            // Some of the node_modules may have their own "babel" section in
+            // their project.json (or a ".babelrc" file). We need to ignore
+            // those as we're using our own Babel options.
+            babelrc: false,
+            presets: [
+              [
+                "@babel/env",
+                {
+                  loose: true,
+                  exclude: ["transform-typeof-symbol"],
+                },
+              ],
+              ["@babel/stage-0", { loose: true }],
+            ],
+          },
+        },
+      ],
+      // babylon is already bundled and does not require parsing
+      noParse: [/babylon\/lib/],
+    },
+    node: {
+      // Mock Node.js modules that Babel require()s but that we don't
+      // particularly care about.
+      fs: "empty",
+      module: "empty",
+      net: "empty",
+    },
+    output: {
+      filename: opts.filename,
+      library: opts.library,
+      libraryTarget: "umd",
+    },
+    plugins: [
+      new webpack.DefinePlugin({
+        "process.env.NODE_ENV": '"production"',
+        "process.env": JSON.stringify({ NODE_ENV: "production" }),
+        BABEL_VERSION: JSON.stringify(babelVersion),
+        VERSION: JSON.stringify(version),
+      }),
+      /*new webpack.NormalModuleReplacementPlugin(
+        /..\/..\/package/,
+        "../../../../src/babel-package-shim"
+      ),*/
+      new webpack.optimize.ModuleConcatenationPlugin(),
+    ].concat(plugins),
+    resolve: {
+      plugins: [
+        // Dedupe packages that are used across multiple plugins.
+        // This replaces DedupePlugin from Webpack 1.x
+        new RootMostResolvePlugin(__dirname, true),
+      ],
+    },
+  };
+
+  if (opts.library !== "Babel") {
+    config.externals = {
+      "@babel/standalone": "Babel",
+    };
+  }
+
+  return webpackStream(config, webpack);
+  // To write JSON for debugging:
+  /*return webpackStream(config, webpack, (err, stats) => {
+    require('gulp-util').log(stats.toString({colors: true}));
+    require('fs').writeFileSync('webpack-debug.json', JSON.stringify(stats.toJson()));
+  });*/
+}
+
+function registerStandalonePackageTask(
+  gulp,
+  name,
+  exportName,
+  pathname,
+  version,
+  plugins
+) {
+  const standaloneName = name + "-standalone";
+  const standalonePath = path.join(pathname, standaloneName);
+  gulp.task("build-" + standaloneName, cb => {
+    pump(
+      [
+        gulp.src(path.join(standalonePath, "src/index.js")),
+        webpackBuild({
+          filename: name + ".js",
+          library: exportName,
+          version,
+          plugins,
+        }),
+        gulp.dest(standalonePath),
+        uglify(),
+        rename({ extname: ".min.js" }),
+        gulp.dest(standalonePath),
+      ],
+      cb
+    );
+  });
+}
+
+module.exports = {
+  webpackBuild: webpackBuild,
+  registerStandalonePackageTask: registerStandalonePackageTask,
+};