EOL for Rails < 5.2 and Ruby < 2.3.0

.travis.yml

@@ -1,22 +1,15 @@
 language: ruby
 dist: xenial
 before_install:
-  - gem install rubygems-update -v 3.0.6 && update_rubygems
-  # Rails 4.2 doesn't support bundler 2.0, so we need to lock bundler to
-  # v1.17.3. This is just for Ruby 2.5 which ships with bundler 2.x on Travis
-  # CI while Ruby 2.6 does not.
-  # https://github.com/travis-ci/travis-rubies/issues/57#issuecomment-458981237
-  - yes | rvm @global do gem install bundler -v 1.17.3 || true
+  - gem install rubygems-update && update_rubygems
+  - yes | rvm @global do gem install bundler -v 2.1.4 || true
 rvm:
-  - 2.3.8
-  - 2.4.6
+  - 2.4.9
   - 2.5.5
-  - 2.6.3
+  - 2.6.5
+  - 2.7.0
   - ruby-head
 gemfile:
-  - gemfiles/Gemfile-rails.4.2.x
-  - gemfiles/Gemfile-rails.5.0.x
-  - gemfiles/Gemfile-rails.5.1.x
   - gemfiles/Gemfile-rails.5.2.x
   - gemfiles/Gemfile-rails.6.0.x
   - gemfiles/Gemfile-rails-edge
@@ -28,7 +21,7 @@ cache:
 
 install:
   - bundle install --jobs 3 --retry 3
-  - nvm install 10
+  - nvm install 12
   - node -v
   - npm i -g yarn
   - yarn
@@ -42,15 +35,9 @@ matrix:
     - gemfile: gemfiles/Gemfile-rails-edge
     - rvm: ruby-head
   exclude:
-    - rvm: 2.3.8
-      gemfile: gemfiles/Gemfile-rails-edge
-    - rvm: 2.4.6
+    - rvm: 2.4.9
       gemfile: gemfiles/Gemfile-rails-edge
     - rvm: 2.5.5
       gemfile: gemfiles/Gemfile-rails-edge
-    - rvm: ruby-head
-      gemfile: gemfiles/Gemfile-rails.4.2.x
-    - rvm: 2.3.8
-      gemfile: gemfiles/Gemfile-rails.6.0.x
-    - rvm: 2.4.6
+    - rvm: 2.4.9
       gemfile: gemfiles/Gemfile-rails.6.0.x

Gemfile.lock

@@ -2,9 +2,9 @@ PATH
   remote: .
   specs:
     webpacker (4.2.2)
-      activesupport (>= 4.2)
+      activesupport (>= 5.2)
       rack-proxy (>= 0.6.1)
-      railties (>= 4.2)
+      railties (>= 5.2)
       semantic_range (>= 2.3.0)
 
 GEM

README.md

@@ -50,8 +50,8 @@ in which case you may not even need the asset pipeline. This is mostly relevant
 
 ## Prerequisites
 
-* Ruby 2.3+
-* Rails 4.2+
+* Ruby 2.4+
+* Rails 5.2+
 * Node.js 10.13.0+
 * Yarn 1.x+
 

webpacker.gemspec

@@ -15,11 +15,11 @@ Gem::Specification.new do |s|
     "changelog_uri"   => "https://github.com/rails/webpacker/blob/v#{Webpacker::VERSION}/CHANGELOG.md"
   }
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.0"
 
-  s.add_dependency "activesupport",  ">= 4.2"
-  s.add_dependency "railties",       ">= 4.2"
-  s.add_dependency "rack-proxy",     ">= 0.6.1"
+  s.add_dependency "activesupport", ">= 5.2"
+  s.add_dependency "railties",      ">= 5.2"
+  s.add_dependency "rack-proxy",    ">= 0.6.1"
   s.add_dependency "semantic_range", ">= 2.3.0"
 
   s.add_development_dependency "bundler", ">= 1.3.0"