revert dev:cache to rake task, fixes #23410

railties/lib/rails/commands.rb

@@ -14,6 +14,5 @@ command = ARGV.shift
 command = aliases[command] || command
 
 require 'rails/command'
-require 'rails/commands/dev_cache'
 
 Rails::Command.run(command, ARGV)

railties/lib/rails/commands/dev_cache.rb

@@ -1,21 +0,0 @@
-require 'rails/command'
-
-module Rails
-  module Commands
-    # This is a wrapper around the Rails dev:cache command
-    class DevCache < Command
-      set_banner :dev_cache, 'Toggle development mode caching on/off'
-      def dev_cache
-        if File.exist? 'tmp/caching-dev.txt'
-          File.delete 'tmp/caching-dev.txt'
-          puts 'Development mode is no longer being cached.'
-        else
-          FileUtils.touch 'tmp/caching-dev.txt'
-          puts 'Development mode is now being cached.'
-        end
-
-        FileUtils.touch 'tmp/restart.txt'
-      end
-    end
-  end
-end

railties/lib/rails/tasks.rb

@@ -3,6 +3,7 @@ require 'rake'
 # Load Rails Rakefile extensions
 %w(
   annotations
+  dev
   framework
   initializers
   log

railties/lib/rails/tasks/dev.rake

@@ -0,0 +1,14 @@
+namespace :dev do
+  desc 'Toggle development mode caching on/off'
+  task :cache do
+    if File.exist? 'tmp/caching-dev.txt'
+      File.delete 'tmp/caching-dev.txt'
+      puts 'Development mode is no longer being cached.'
+    else
+      FileUtils.touch 'tmp/caching-dev.txt'
+      puts 'Development mode is now being cached.'
+    end
+
+    FileUtils.touch 'tmp/restart.txt'
+  end
+end

railties/test/application/rake/dev_test.rb

@@ -0,0 +1,34 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  module RakeTests
+    class RakeDevTest < ActiveSupport::TestCase
+      include ActiveSupport::Testing::Isolation
+
+      def setup
+        build_app
+      end
+
+      def teardown
+        teardown_app
+      end
+
+      test 'dev:cache creates file and outputs message' do
+        Dir.chdir(app_path) do
+          output = `rake dev:cache`
+          assert File.exist?('tmp/caching-dev.txt')
+          assert_match(/Development mode is now being cached/, output)
+        end
+      end
+
+      test 'dev:cache deletes file and outputs message' do
+        Dir.chdir(app_path) do
+          `rails dev:cache` # Create caching file.
+          output = `rails dev:cache` # Delete caching file.
+          assert_not File.exist?('tmp/caching-dev.txt')
+          assert_match(/Development mode is no longer being cached/, output)
+        end
+      end
+    end
+  end
+end

railties/test/commands/dev_cache_test.rb

@@ -1,32 +0,0 @@
-require_relative '../isolation/abstract_unit'
-
-module CommandsTests
-  class DevCacheTest < ActiveSupport::TestCase
-    include ActiveSupport::Testing::Isolation
-
-    def setup
-      build_app
-    end
-
-    def teardown
-      teardown_app
-    end
-
-    test 'dev:cache creates file and outputs message' do
-      Dir.chdir(app_path) do
-        output = `rails dev:cache`
-        assert File.exist?('tmp/caching-dev.txt')
-        assert_match(%r{Development mode is now being cached}, output)
-      end
-    end
-
-    test 'dev:cache deletes file and outputs message' do
-      Dir.chdir(app_path) do
-        `rails dev:cache` # Create caching file.
-        output = `rails dev:cache` # Delete caching file.
-        assert_not File.exist?('tmp/caching-dev.txt')
-        assert_match(%r{Development mode is no longer being cached}, output)
-      end
-    end
-  end
-end