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

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
+);