Add reboot! to rails console

railties/lib/rails/console/app.rb

@@ -2,6 +2,7 @@
 
 require "active_support/all"
 require "action_controller"
+require "irb"
 
 module Rails
   module ConsoleMethods
@@ -34,5 +35,15 @@ def reload!(print = true)
       Rails.application.reloader.reload!
       true
     end
+
+    # reboot a brand new session and exit current context
+    def reboot!(print = true)
+      puts "Rebooting..." if print
+      existing_context = IRB.CurrentContext
+      Rails.application.reloader.reload!
+      IRB.start
+      existing_context.exit
+      true
+    end
   end
 end

railties/test/application/console_test.rb

@@ -174,4 +174,15 @@ def test_environment_option_and_irb_option
     write_prompt "puts Rails.env", "puts Rails.env\r\ntest"
     @primary.puts "quit"
   end
+
+  def test_reboot
+    options = "-- --verbose"
+    options += " --singleline --nocolorize" if RUBY_VERSION >= "2.7"
+    spawn_console(options)
+
+    write_prompt "a = 1", "a = 1"
+    write_prompt "reboot!", "Rebooting..."
+    write_prompt "a", "undefined local variable or method `a' for main:Object"
+    @primary.puts "quit"
+  end
 end