Switch to terser gem from uglifier for JS compression

closes #8268

Changelog.md

@@ -5,6 +5,7 @@
 * Fix html-syntax in some handlebars templates [#8251](https://github.com/diaspora/diaspora/pull/8251)
 * Remove `chat_enabled` flag from archive export [#8265](https://github.com/diaspora/diaspora/pull/8265)
 * Change thumbnails in image slideshow to squares [#8275](https://github.com/diaspora/diaspora/pull/8275)
+* Replace uglifier with terser for JS compression [#8268](https://github.com/diaspora/diaspora/pull/8268)
 
 ## Bug fixes
 

Gemfile

@@ -46,7 +46,7 @@ gem "sidekiq-cron", "1.2.0"
 
 # Compression
 
-gem "uglifier", "4.2.0"
+gem "terser", "1.1.5"
 
 # Configuration
 

Gemfile.lock

@@ -724,6 +724,8 @@ GEM
     temple (0.8.2)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
+    terser (1.1.5)
+      execjs (>= 0.3.0, < 3)
     thor (1.1.0)
     thread_safe (0.3.6)
     tilt (2.0.10)
@@ -749,8 +751,6 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.9)
       thread_safe (~> 0.1)
-    uglifier (4.2.0)
-      execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)
@@ -918,13 +918,13 @@ DEPENDENCIES
   sinon-rails (= 1.15.0)
   sprockets-rails (= 3.2.2)
   string-direction (= 1.2.2)
+  terser (= 1.1.5)
   timecop (= 0.9.4)
   toml-rb (= 2.0.1)
   turbo_dev_assets (= 0.0.2)
   twitter (= 7.0.0)
   twitter-text (= 1.14.7)
   typhoeus (= 1.4.0)
-  uglifier (= 4.2.0)
   unicorn (= 6.0.0)
   unicorn-worker-killer (= 0.4.5)
   uuid (= 2.3.9)

config/environments/production.rb

@@ -27,7 +27,7 @@ Rails.application.configure do
   config.public_file_server.enabled = ENV["RAILS_SERVE_STATIC_FILES"].present?
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  config.assets.js_compressor = :terser
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.

lib/bookmarklet_renderer.rb

@@ -30,7 +30,7 @@ class BookmarkletRenderer
 
     def compile
       src = File.read(source)
-      @body = Uglifier.compile(src)
+      @body = Terser.compile(src)
       FileUtils.mkdir_p cached_path.dirname
       File.open(cached_path, "w") {|f| f.write(@body) }
     end