Rails 7 requires Ruby 2.7 and prefer Ruby 3+

The code cleanup is comming in later commits but this
already remove support to Ruby < 2.7.

actioncable/actioncable.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "WebSocket framework for Rails."
   s.description = "Structure many real-time application concerns into channels over a single WebSocket connection."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

actionmailbox/actionmailbox.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Inbound email handling framework."
   s.description = "Receive and process incoming emails in Rails applications."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license  = "MIT"
 

actionmailer/actionmailer.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Email composition and delivery framework (part of Rails)."
   s.description = "Email on Rails. Compose, deliver, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

actionpack/actionpack.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Web-flow and rendering framework putting the VC in MVC (part of Rails)."
   s.description = "Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web applications. Works with any Rack-compatible server."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

actiontext/actiontext.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Rich text framework."
   s.description = "Edit and display rich text in Rails applications."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license  = "MIT"
 

actionview/actionview.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Rendering framework putting the V in MVC (part of Rails)."
   s.description = "Simple, battle-tested conventions and helpers for building web pages."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

activejob/activejob.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Job framework with pluggable queues."
   s.description = "Declare job classes that can be run by a variety of queuing backends."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

activemodel/activemodel.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "A toolkit for building modeling frameworks (part of Rails)."
   s.description = "A toolkit for building modeling frameworks like Active Record. Rich support for attributes, callbacks, validations, serialization, internationalization, and testing."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

activerecord/activerecord.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Object-relational mapper framework (part of Rails)."
   s.description = "Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

activestorage/activestorage.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Local and cloud file storage framework."
   s.description = "Attach cloud and local files in Rails applications."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

activesupport/activesupport.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "A toolkit of support libraries and Ruby core extensions extracted from the Rails framework."
   s.description = "A toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Rich support for multibyte strings, internationalization, time zones, and testing."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"
 

guides/source/active_record_postgresql.md

@@ -166,7 +166,7 @@ irb> Event.where("payload->>'kind' = ?", "user_renamed")
 * [type definition](https://www.postgresql.org/docs/current/static/rangetypes.html)
 * [functions and operators](https://www.postgresql.org/docs/current/static/functions-range.html)
 
-This type is mapped to Ruby [`Range`](https://ruby-doc.org/core-2.5.0/Range.html) objects.
+This type is mapped to Ruby [`Range`](https://ruby-doc.org/core-2.7.0/Range.html) objects.
 
 ```ruby
 # db/migrate/20130923065404_create_events.rb
@@ -408,7 +408,7 @@ irb> user.save!
 * [type definition](https://www.postgresql.org/docs/current/static/datatype-net-types.html)
 
 The types `inet` and `cidr` are mapped to Ruby
-[`IPAddr`](https://ruby-doc.org/stdlib-2.5.0/libdoc/ipaddr/rdoc/IPAddr.html)
+[`IPAddr`](https://ruby-doc.org/stdlib-2.7.0/libdoc/ipaddr/rdoc/IPAddr.html)
 objects. The `macaddr` type is mapped to normal text.
 
 ```ruby

guides/source/command_line.md

@@ -454,7 +454,7 @@ $ bin/rails destroy model Oops
 $ bin/rails about
 About your application's environment
 Rails version             6.0.0
-Ruby version              2.5.0 (x86_64-linux)
+Ruby version              2.7.0 (x86_64-linux)
 RubyGems version          2.7.3
 Rack version              2.0.4
 JavaScript Runtime        Node.js (V8)

guides/source/getting_started.md

@@ -95,10 +95,10 @@ current version of Ruby installed:
 
 ```bash
 $ ruby --version
-ruby 2.5.0
+ruby 2.7.0
 ```
 
-Rails requires Ruby version 2.5.0 or later. If the version number returned is
+Rails requires Ruby version 2.7.0 or later. If the version number returned is
 less than that number (such as 2.3.7, or 1.8.7), you'll need to install a fresh copy of Ruby.
 
 To install Rails on Windows, you'll first need to install [Ruby Installer](https://rubyinstaller.org/).

guides/source/upgrading_ruby_on_rails.md

@@ -35,6 +35,7 @@ You can find a list of all released Rails versions [here](https://rubygems.org/g
 
 Rails generally stays close to the latest released Ruby version when it's released:
 
+* Rails 6 requires Ruby 2.7.0 or newer.
 * Rails 6 requires Ruby 2.5.0 or newer.
 * Rails 5 requires Ruby 2.2.2 or newer.
 * Rails 4 prefers Ruby 2.0 and requires 1.9.3 or newer.

rails.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Full-stack web application framework."
   s.description = "Ruby on Rails is a full-stack web framework optimized for programmer happiness and sustainable productivity. It encourages beautiful code by favoring convention over configuration."
 
-  s.required_ruby_version     = ">= 2.5.0"
+  s.required_ruby_version     = ">= 2.7.0"
   s.required_rubygems_version = ">= 1.8.11"
 
   s.license = "MIT"

railties/lib/rails/ruby_version_check.rb

@@ -1,15 +1,15 @@
 # frozen_string_literal: true
 
-if Gem::Version.new(RUBY_VERSION) < Gem::Version.new("2.5.0") && RUBY_ENGINE == "ruby"
+if Gem::Version.new(RUBY_VERSION) < Gem::Version.new("2.7.0") && RUBY_ENGINE == "ruby"
   desc = defined?(RUBY_DESCRIPTION) ? RUBY_DESCRIPTION : "ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE})"
   abort <<-end_message
 
-    Rails 6 requires Ruby 2.5.0 or newer.
+    Rails 7 requires Ruby 2.7.0 or newer.
 
     You're running
       #{desc}
 
-    Please upgrade to Ruby 2.5.0 or newer to continue.
+    Please upgrade to Ruby 2.7.0 or newer to continue.
 
   end_message
 end

railties/railties.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Tools for creating, working with, and running Rails applications."
   s.description = "Rails internals: application bootup, plugins, generators, and rake tasks."
 
-  s.required_ruby_version = ">= 2.5.0"
+  s.required_ruby_version = ">= 2.7.0"
 
   s.license = "MIT"