change Uglify to Terser (#1382)

package.json

@@ -8,12 +8,7 @@
     "type": "git",
     "url": "https://github.com/parcel-bundler/parcel.git"
   },
-  "files": [
-    "bin/",
-    "lib/",
-    "src/",
-    "index.js"
-  ],
+  "files": ["bin/", "lib/", "src/", "index.js"],
   "dependencies": {
     "ansi-to-html": "^0.6.4",
     "babel-code-frame": "^6.26.0",
@@ -64,7 +59,7 @@
     "strip-ansi": "^4.0.0",
     "toml": "^2.3.3",
     "tomlify-j0.4": "^3.0.0",
-    "uglify-es": "^3.2.1",
+    "terser": "^3.7.3",
     "v8-compile-cache": "^2.0.0",
     "ws": "^5.1.1"
   },
@@ -111,10 +106,13 @@
     "format": "prettier --write \"./{src,bin,test}/**/*.{js,json,md}\"",
     "build": "yarn minify && babel src -d lib && ncp src/builtins lib/builtins",
     "prepublish": "yarn build",
-    "minify": "uglifyjs -c -m -o src/builtins/prelude.min.js src/builtins/prelude.js",
+    "minify":
+      "terser -c -m -o src/builtins/prelude.min.js src/builtins/prelude.js",
     "precommit": "npm run lint && lint-staged",
-    "lint": "eslint . && prettier \"./{src,bin,test}/**/*.{js,json,md}\" --list-different",
-    "postinstall": "node -e \"console.log('\\u001b[35m\\u001b[1mLove Parcel? You can now donate to our open collective:\\u001b[22m\\u001b[39m\\n > \\u001b[34mhttps://opencollective.com/parcel/donate\\u001b[0m')\""
+    "lint":
+      "eslint . && prettier \"./{src,bin,test}/**/*.{js,json,md}\" --list-different",
+    "postinstall":
+      "node -e \"console.log('\\u001b[35m\\u001b[1mLove Parcel? You can now donate to our open collective:\\u001b[22m\\u001b[39m\\n > \\u001b[34mhttps://opencollective.com/parcel/donate\\u001b[0m')\""
   },
   "bin": {
     "parcel": "bin/cli.js"
@@ -123,10 +121,7 @@
     "node": ">= 6.0.0"
   },
   "lint-staged": {
-    "*.{js,json,md}": [
-      "prettier --write",
-      "git add"
-    ]
+    "*.{js,json,md}": ["prettier --write", "git add"]
   },
   "collective": {
     "type": "opencollective",

src/assets/JSAsset.js

@@ -10,7 +10,7 @@ const fsVisitor = require('../visitors/fs');
 const envVisitor = require('../visitors/env');
 const babel = require('../transforms/babel');
 const generate = require('babel-generator').default;
-const uglify = require('../transforms/uglify');
+const terser = require('../transforms/terser');
 const SourceMap = require('../SourceMap');
 
 const IMPORT_RE = /\b(?:import\b|export\b|require\s*\()/;
@@ -128,7 +128,7 @@ class JSAsset extends Asset {
     }
 
     if (this.options.minify) {
-      await uglify(this);
+      await terser(this);
     }
   }
 

src/assets/JSONAsset.js

@@ -1,7 +1,7 @@
 const Asset = require('../Asset');
 const path = require('path');
 const json5 = require('json5');
-const {minify} = require('uglify-es');
+const {minify} = require('terser');
 
 class JSONAsset extends Asset {
   constructor(name, options) {

src/assets/VueAsset.js

@@ -1,7 +1,7 @@
 const Asset = require('../Asset');
 const localRequire = require('../utils/localRequire');
 const md5 = require('../utils/md5');
-const {minify} = require('uglify-es');
+const {minify} = require('terser');
 
 class VueAsset extends Asset {
   constructor(name, options) {

src/transforms/uglify.js → src/transforms/terser.js

@@ -1,4 +1,4 @@
-const {minify} = require('uglify-es');
+const {minify} = require('terser');
 const SourceMap = require('../SourceMap');
 
 module.exports = async function(asset) {
@@ -7,7 +7,7 @@ module.exports = async function(asset) {
   // Convert AST into JS
   let source = (await asset.generate()).js;
 
-  let customConfig = await asset.getConfig(['.uglifyrc']);
+  let customConfig = await asset.getConfig(['.uglifyrc', '.terserrc']);
   let options = {
     warnings: true,
     mangle: {

src/utils/serializeObject.js

@@ -1,4 +1,4 @@
-const {minify} = require('uglify-es');
+const {minify} = require('terser');
 const {serialize} = require('serialize-to-js');
 
 function serializeObject(obj, shouldMinify = false) {

yarn.lock

@@ -1447,6 +1447,10 @@ commander@~2.13.0:
   version "2.13.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
 
+commander@~2.14.1:
+  version "2.14.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.14.1.tgz#2235123e37af8ca3c65df45b026dbd357b01b9aa"
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -6518,6 +6522,13 @@ tar@^4:
     safe-buffer "^5.1.2"
     yallist "^3.0.2"
 
+terser@^3.7.3:
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.7.3.tgz#e2b6a38f989e4fe46630d4858d184b76ce34883a"
+  dependencies:
+    commander "~2.14.1"
+    source-map "~0.6.1"
+
 test-exclude@^4.2.0:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.2.1.tgz#dfa222f03480bca69207ca728b37d74b45f724fa"
@@ -6678,7 +6689,7 @@ typescript@^2.7.0:
   version "2.8.3"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.3.tgz#5d817f9b6f31bb871835f4edf0089f21abe6c170"
 
-uglify-es@^3.2.1, uglify-es@^3.3.9:
+uglify-es@^3.3.9:
   version "3.3.9"
   resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.9.tgz#0c1c4f0700bed8dbc124cdb304d2592ca203e677"
   dependencies: