Rails 6 requires Ruby 2.4.1+

Skipping over 2.4.0 to sidestep the `"symbol_from_string".to_sym.dup` bug. References rails#32028
jeremy · Feb 17, 2018 · d4eb0dc · d4eb0dc
1 parent 33886e2
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diff --git a/.rubocop.yml b/.rubocop.yml
@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
   # to ignore them, so only the ones explicitly set in this file are enabled.
   DisabledByDefault: true

diff --git a/.travis.yml b/.travis.yml
@@ -60,28 +60,21 @@ env:
     - "GEM=ac:integration"
 
 rvm:
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
+  - 2.4
+  - 2.5
   - ruby-head
 
 matrix:
   include:
-    - rvm: 2.5.0
+    - rvm: 2.5
       env: "GEM=av:ujs"
-    - rvm: 2.3.6
+    - rvm: 2.4
       env: "GEM=aj:integration"
       services:
         - memcached
         - redis-server
         - rabbitmq
-    - rvm: 2.4.3
-      env: "GEM=aj:integration"
-      services:
-        - memcached
-        - redis-server
-        - rabbitmq
-    - rvm: 2.5.0
+    - rvm: 2.5
       env: "GEM=aj:integration"
       services:
         - memcached
@@ -93,15 +86,15 @@ matrix:
         - memcached
         - redis-server
         - rabbitmq
-    - rvm: 2.3.6
+    - rvm: 2.5
       env:
         - "GEM=ar:mysql2 MYSQL=mariadb"
       addons:
         mariadb: 10.2
-    - rvm: 2.3.6
+    - rvm: 2.5
       env:
         - "GEM=ar:sqlite3_mem"
-    - rvm: 2.3.6
+    - rvm: 2.5
       env:
         - "GEM=ar:postgresql POSTGRES=9.2"
       addons:

diff --git a/actioncable/CHANGELOG.md b/actioncable/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
 
 
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/actioncable/CHANGELOG.md) for previous changes.
diff --git a/actioncable/actioncable.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
 
 
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/actionmailer/CHANGELOG.md) for previous changes.
diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.summary     = "Email composition, delivery, and receiving framework (part of Rails)."
   s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
@@ -1,3 +1,9 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
+
 *   Add alias method `to_hash` to `to_h` for `cookies`.
     Add alias method `to_h` to `to_hash` for `session`.
 

diff --git a/actionpack/actionpack.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require "active_support/core_ext/hash/indifferent_access"
-require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/array/wrap"
 require "active_support/core_ext/string/filters"
 require "active_support/core_ext/object/to_query"

diff --git a/actionpack/test/controller/parameters/accessors_test.rb b/actionpack/test/controller/parameters/accessors_test.rb
@@ -2,7 +2,6 @@
 
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
-require "active_support/core_ext/hash/transform_values"
 
 class ParametersAccessorsTest < ActiveSupport::TestCase
   setup do

diff --git a/actionpack/test/controller/parameters/mutators_test.rb b/actionpack/test/controller/parameters/mutators_test.rb
@@ -2,7 +2,6 @@
 
 require "abstract_unit"
 require "action_controller/metal/strong_parameters"
-require "active_support/core_ext/hash/transform_values"
 
 class ParametersMutatorsTest < ActiveSupport::TestCase
   setup do

diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
 
 
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/actionview/CHANGELOG.md) for previous changes.
diff --git a/actionview/actionview.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/actionview/test/template/date_helper_test.rb b/actionview/test/template/date_helper_test.rb
@@ -144,15 +144,13 @@ def test_distance_in_words_doesnt_use_the_quotient_operator
     rubinius_skip "Date is written in Ruby and relies on Fixnum#/"
     jruby_skip "Date is written in Ruby and relies on Fixnum#/"
 
-    klass = RUBY_VERSION > "2.4" ? Integer : Fixnum
-
     # Make sure that we avoid {Integer,Fixnum}#/ (redefined by mathn)
-    klass.send :private, :/
+    Integer.send :private, :/
 
     from = Time.utc(2004, 6, 6, 21, 45, 0)
     assert_distance_of_time_in_words(from)
   ensure
-    klass.send :public, :/
+    Integer.send :public, :/
   end
 
   def test_time_ago_in_words_passes_include_seconds

diff --git a/activejob/CHANGELOG.md b/activejob/CHANGELOG.md
@@ -1,3 +1,9 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
+
 *   Add support to define custom argument serializers.
 
     *Evgenii Pecherkin*, *Rafael Mendonça França*

diff --git a/activejob/activejob.gemspec b/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 queueing backends."
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/activejob/lib/active_job/arguments.rb b/activejob/lib/active_job/arguments.rb
@@ -14,8 +14,8 @@ def initialize #:nodoc:
   end
 
   # Raised when an unsupported argument type is set as a job argument. We
-  # currently support NilClass, Integer, Fixnum, Float, String, TrueClass, FalseClass,
-  # Bignum, BigDecimal, and objects that can be represented as GlobalIDs (ex: Active Record).
+  # currently support NilClass, Integer, Float, String, TrueClass, FalseClass,
+  # BigDecimal, and objects that can be represented as GlobalIDs (ex: Active Record).
   # Raised if you set the key for a Hash something else than a string or
   # a symbol. Also raised when trying to serialize an object which can't be
   # identified with a Global ID - such as an unpersisted Active Record model.
@@ -25,7 +25,6 @@ module Arguments
     extend self
     # :nodoc:
     TYPE_WHITELIST = [ NilClass, String, Integer, Float, BigDecimal, TrueClass, FalseClass ]
-    TYPE_WHITELIST.push(Fixnum, Bignum) unless 1.class == Integer
 
     # Serializes a set of arguments. Whitelisted types are returned
     # as-is. Arrays/Hashes are serialized element by element.

diff --git a/activejob/lib/active_job/logging.rb b/activejob/lib/active_job/logging.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/string/filters"
 require "active_support/tagged_logging"
 require "active_support/logger"

diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
 
 
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/activemodel/CHANGELOG.md) for previous changes.
diff --git a/activemodel/activemodel.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
@@ -1,4 +1,9 @@
 ## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
+
 *   Deprecate `update_attributes`/`!` in favor of `update`/`!`.
 
     *Eddie Lebow*

diff --git a/activerecord/activerecord.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
@@ -9,7 +9,6 @@
 require "active_support/core_ext/array/extract_options"
 require "active_support/core_ext/hash/deep_merge"
 require "active_support/core_ext/hash/slice"
-require "active_support/core_ext/hash/transform_values"
 require "active_support/core_ext/string/behavior"
 require "active_support/core_ext/kernel/singleton_class"
 require "active_support/core_ext/module/introspection"

diff --git a/activestorage/CHANGELOG.md b/activestorage/CHANGELOG.md
@@ -1,8 +1,15 @@
+## Rails 6.0.0.alpha (Unreleased) ##
+
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
+
 *   Add source code to published npm package
 
     This allows activestorage users to depend on the javascript source code
     rather than the compiled code, which can produce smaller javascript bundles.
 
     *Richard Macklin*
 
+
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/activestorage/CHANGELOG.md) for previous changes.
diff --git a/activestorage/activestorage.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
@@ -1,7 +1,14 @@
-* Adds parallel testing to Rails
+## Rails 6.0.0.alpha (Unreleased) ##
 
-  Parallelize your test suite with forked processes or threads.
+*   Rails 6 requires Ruby 2.4.1 or newer.
+
+    *Jeremy Daer*
+
+*   Adds parallel testing to Rails
+
+    Parallelize your test suite with forked processes or threads.
+
+    *Eileen M. Uchitelle*, *Aaron Patterson*
 
-  *Eileen M. Uchitelle*, *Aaron Patterson*
 
 Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/activesupport/CHANGELOG.md) for previous changes.
diff --git a/activesupport/activesupport.gemspec b/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 = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.license = "MIT"
 

diff --git a/activesupport/lib/active_support/cache/redis_cache_store.rb b/activesupport/lib/active_support/cache/redis_cache_store.rb
@@ -17,7 +17,6 @@
 
 require "digest/sha2"
 require "active_support/core_ext/marshal"
-require "active_support/core_ext/hash/transform_values"
 
 module ActiveSupport
   module Cache

diff --git a/activesupport/lib/active_support/core_ext/hash.rb b/activesupport/lib/active_support/core_ext/hash.rb
@@ -8,4 +8,3 @@
 require "active_support/core_ext/hash/keys"
 require "active_support/core_ext/hash/reverse_merge"
 require "active_support/core_ext/hash/slice"
-require "active_support/core_ext/hash/transform_values"
diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb
@@ -1,32 +1,5 @@
 # frozen_string_literal: true
 
-class Hash
-  # Returns a new hash with the results of running +block+ once for every value.
-  # The keys are unchanged.
-  #
-  #   { a: 1, b: 2, c: 3 }.transform_values { |x| x * 2 } # => { a: 2, b: 4, c: 6 }
-  #
-  # If you do not provide a +block+, it will return an Enumerator
-  # for chaining with other methods:
-  #
-  #   { a: 1, b: 2 }.transform_values.with_index { |v, i| [v, i].join.to_i } # => { a: 10, b: 21 }
-  def transform_values
-    return enum_for(:transform_values) { size } unless block_given?
-    return {} if empty?
-    result = self.class.new
-    each do |key, value|
-      result[key] = yield(value)
-    end
-    result
-  end unless method_defined? :transform_values
+require "active_support/deprecation"
 
-  # Destructively converts all values using the +block+ operations.
-  # Same as +transform_values+ but modifies +self+.
-  def transform_values!
-    return enum_for(:transform_values!) { size } unless block_given?
-    each do |key, value|
-      self[key] = yield(value)
-    end
-  end unless method_defined? :transform_values!
-  # TODO: Remove this file when supporting only Ruby 2.4+.
-end
+ActiveSupport::Deprecation.warn "Ruby 2.4+ (required by Rails 6) provides Hash#transform_values natively, so requiring active_support/core_ext/hash/transform_values is no longer necessary. Requiring it will raise LoadError in Rails 6.1."
diff --git a/activesupport/lib/active_support/core_ext/numeric/conversions.rb b/activesupport/lib/active_support/core_ext/numeric/conversions.rb
@@ -129,12 +129,6 @@ def to_s(format = nil, options = nil)
   end
 end
 
-# Ruby 2.4+ unifies Fixnum & Bignum into Integer.
-if 0.class == Integer
-  Integer.prepend ActiveSupport::NumericWithFormat
-else
-  Fixnum.prepend ActiveSupport::NumericWithFormat
-  Bignum.prepend ActiveSupport::NumericWithFormat
-end
+Integer.prepend ActiveSupport::NumericWithFormat
 Float.prepend ActiveSupport::NumericWithFormat
 BigDecimal.prepend ActiveSupport::NumericWithFormat
diff --git a/activesupport/lib/active_support/core_ext/object/duplicable.rb b/activesupport/lib/active_support/core_ext/object/duplicable.rb
@@ -75,8 +75,11 @@ def duplicable?
 
 class Symbol
   begin
-    :symbol.dup # Ruby 2.4.x.
-    "symbol_from_string".to_sym.dup # Some symbols can't `dup` in Ruby 2.4.0.
+    :symbol.dup
+
+    # Some symbols couldn't be duped in Ruby 2.4.0 only, due to a bug.
+    # This feature check catches any regression.
+    "symbol_from_string".to_sym.dup
   rescue TypeError
 
     # Symbols are not duplicable: