use terser

alphagov · Nov 13, 2023 · 02397bb · 02397bb
1 parent 021f810
commit 02397bb
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Showing 3 changed files with 19 additions and 4 deletions.
diff --git a/Gemfile b/Gemfile
@@ -22,7 +22,7 @@ gem "rss"
 gem "sassc-rails"
 gem "slimmer"
 gem "sprockets-rails"
-gem "uglifier"
+gem "terser"
 
 group :development, :test do
   gem "govuk_schemas"

diff --git a/Gemfile.lock b/Gemfile.lock
@@ -601,8 +601,6 @@ GEM
     timeout (0.4.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    uglifier (4.2.0)
-      execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
@@ -656,8 +654,8 @@ DEPENDENCIES
   simplecov
   slimmer
   sprockets-rails
+  terser
   timecop
-  uglifier
   webmock
 
 RUBY VERSION

diff --git a/config/initializers/sprockets.rb b/config/initializers/sprockets.rb
@@ -0,0 +1,17 @@
+# This adds terser as a recognised compressor
+# to Sprockets. Without this patch, Sprockets
+# will not be able to run terser.
+#
+# Code originates from:
+# https://stackoverflow.com/a/70086366
+
+require "terser"
+
+module Sprockets
+  class Environment < Base
+    def js_compressor=(compressor)
+      register_compressor "application/javascript", :terser, Terser::Compressor
+      super
+    end
+  end
+end