deps: use @browserify/uglifyify (#42)

* deps: use @browserify/uglifyify

* fall back to an older terser version on old node.js

index.js

@@ -3,12 +3,25 @@ var collapser = require('bundle-collapser/plugin')
 var packFlatStream = require('browser-pack-flat')
 var commonShake = require('common-shakeify')
 var unassertify = require('unassertify')
-var uglify = require('minify-stream')
+var minifyStream = require('minify-stream')
 var envify = require('@browserify/envify/custom')
-var uglifyify = require('uglifyify')
+var uglifyify = require('@browserify/uglifyify')
+
+function getUglify () {
+  // For older Node.js versions, fall back to an earlier `terser` version.
+  var uglify = null
+  try {
+    Function('var a = async () => {}') // eslint-disable-line no-new-func
+  } catch (_err) {
+    uglify = require('terser')
+  }
+
+  return uglify
+}
 
 function makeUglifyOptions (debug) {
   var uglifyOpts = {
+    uglify: getUglify(),
     output: {
       ascii_only: true
     },
@@ -42,6 +55,7 @@ module.exports = function (b, opts) {
   b.transform(envify(env), { global: true })
   // Remove dead code.
   b.transform(uglifyify, {
+    uglify: getUglify(),
     global: true,
     toplevel: true,
     // No need to mangle here, will do that at the end.
@@ -66,7 +80,7 @@ module.exports = function (b, opts) {
 
   // Minify the final output.
   var uglifyOpts = makeUglifyOptions(b._options.debug)
-  b.pipeline.get('pack').push(uglify(uglifyOpts))
+  b.pipeline.get('pack').push(minifyStream(uglifyOpts))
 }
 
 module.exports.applyToPipeline = function applyToPipeline (pipeline, opts) {
@@ -86,5 +100,5 @@ module.exports.applyToPipeline = function applyToPipeline (pipeline, opts) {
 
   // Minify the final output.
   var uglifyOpts = makeUglifyOptions(opts.debug)
-  pipeline.get('pack').push(uglify(uglifyOpts))
+  pipeline.get('pack').push(minifyStream(uglifyOpts))
 }

package.json

@@ -8,13 +8,14 @@
   },
   "dependencies": {
     "@browserify/envify": "^6.0.0",
+    "@browserify/uglifyify": "^6.0.0",
     "browser-pack-flat": "^3.0.9",
     "bundle-collapser": "^1.3.0",
     "common-shakeify": "^1.1.1",
     "minify-stream": "^2.0.1",
     "multisplice": "^1.0.0",
+    "terser": "3.16.1",
     "through2": "^4.0.2",
-    "uglifyify": "^5.0.0",
     "unassertify": "^2.1.1"
   },
   "devDependencies": {

readme.md

@@ -22,8 +22,8 @@ browserify -p tinyify app.js
 ## Included
 
  - [unassertify][] - Remove `assert()` calls
- - [envify][] - Replace environment variables—by default, replaces `NODE_ENV` with `"production"`
- - [uglifyify][] - Remove dead code from modules
+ - [@browserify/envify][] - Replace environment variables—by default, replaces `NODE_ENV` with `"production"`
+ - [@browserify/uglifyify][] - Remove dead code from modules
  - [common-shakeify][] - Remove unused exports from modules
  - [browser-pack-flat][] - Output a "flat" bundle, with all modules in a single scope
  - [bundle-collapser][] - When using the `--no-flat` option, bundle-collapser replaces file paths in `require()` calls with short module IDs
@@ -38,7 +38,7 @@ Options can be provided on the command line using subarg syntax, or in a separat
 
 ### `env: {}`
 
-Supply custom environment variables for [envify][].
+Supply custom environment variables for [@browserify/envify][].
 
 ```js
 b.plugin('tinyify', {
@@ -73,14 +73,14 @@ b.plugin('tinyify', { flat: false })
 If you need further customisation, I recommend installing the tools separately instead:
 
 ```bash
-npm install --save-dev unassertify @browserify/envify uglifyify common-shakeify browser-pack-flat uglify-js
+npm install --save-dev unassertify @browserify/envify @browserify/uglifyify common-shakeify browser-pack-flat terser
 browserify entry.js \
   -g unassertify \
   -g @browserify/envify \
-  -g uglifyify \
+  -g @browserify/uglifyify \
   -p common-shakeify \
   -p browser-pack-flat/plugin \
-| uglifyjs -cm \
+| terser -cm \
 > output.js
 ```
 
@@ -90,7 +90,7 @@ Or with the Node API:
 browserify('entry.js')
     .transform('unassertify', { global: true })
     .transform('@browserify/envify', { global: true })
-    .transform('uglifyify', { global: true })
+    .transform('@browserify/uglifyify', { global: true })
     .plugin('common-shakeify')
     .plugin('browser-pack-flat/plugin')
     .bundle()
@@ -105,8 +105,8 @@ Alternatively you can fork this repo and publish it on npm under a scope with yo
 [Apache-2.0](./LICENSE.md)
 
 [unassertify]: https://github.com/unassert-js/unassertify
-[envify]: https://github.com/browserify/envify
-[uglifyify]: https://github.com/hughsk/uglifyify
+[@browserify/envify]: https://github.com/browserify/envify
+[@browserify/uglifyify]: https://github.com/browserify/uglifyify
 [common-shakeify]: https://github.com/browserify/common-shakeify
 [browser-pack-flat]: https://github.com/goto-bus-stop/browser-pack-flat
 [bundle-collapser]: https://github.com/substack/bundle-collapser