Make after_commit_everywhere a manual dependency on AR 7.1 or older

Active Record 7.2 added native model-less transaction callbacks, so
there is no need for folks using newest AR versions to have
their Gemfiles.`after_commit_everywhere` in their project.

See #32

README.md

@@ -38,17 +38,6 @@ background to share the same database connection, which is something Sequel
 wasn't designed for. Reusing Active Record's connection means (dis)connecting
 and sharing between threads is all handled automatically.
 
-## Framework Agnostic
-
-The only hard dependencies are:
-
-* [ActiveRecord](https://github.com/rails/rails/tree/main/activerecord)
-* [Sequel](https://github.com/jeremyevans/sequel)
-* [after_commit_everywhere](https://github.com/Envek/after_commit_everywhere) (on Active Record 7.1 or older)
-
-...which means you can use it with any Rack / Ruby based framework:
-Rails / Roda / Sinatra etc. or even without a framework.
-
 ## Installation
 
 Add the gem to your project:
@@ -57,6 +46,12 @@ Add the gem to your project:
 $ bundle add sequel-activerecord_connection
 ```
 
+If you're using Active Record 7.1 or older, you'll also need to add the [after_commit_everywhere] gem:
+
+```sh
+$ bundle add after_commit_everywhere # on Active Record 7.1 or older
+```
+
 ## Usage
 
 Assuming you've configured your ActiveRecord connection, you can initialize the
@@ -67,7 +62,7 @@ appropriate Sequel adapter and load the `activerecord_connection` extension: e.g
 # e.g. Rails: config/initializers/sequel.rb
 
 require "sequel"
-DB = Sequel.postgres(extensions: :activerecord_connection) # postgres
+DB = Sequel.postgres(extensions: :activerecord_connection) # for PostgreSQL
 ```
 
 Now any Sequel operations that you make will internaly be done using the
@@ -286,3 +281,4 @@ Everyone interacting in this project's codebases, issue trackers, chat rooms and
 [Oracle enhanced]: https://github.com/rsim/oracle-enhanced
 [SQL Server]: https://github.com/rails-sqlserver/activerecord-sqlserver-adapter
 [sql_log_normalizer]: https://sequel.jeremyevans.net/rdoc-plugins/files/lib/sequel/extensions/sql_log_normalizer_rb.html
+[after_commit_everywhere]: https://github.com/Envek/after_commit_everywhere

gemfiles/Gemfile.activerecord-5.0

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 5.0.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-5.1

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 5.1.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-5.2

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 5.2.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-6.0

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 6.0.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-6.1

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 6.1.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-7.0

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 7.0.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

gemfiles/Gemfile.activerecord-7.1

@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec path: ".."
 
 gem "activerecord", "~> 7.1.0"
+gem "after_commit_everywhere", "~> 1.1"
 
 platform :mri do
   gem "pg",      "~> 1.0"

lib/sequel/extensions/activerecord_connection.rb

@@ -118,8 +118,7 @@ def rollback_transaction(conn, opts = OPTS)
 
     # When Active Record holds the transaction, we cannot use Sequel hooks,
     # because Sequel doesn't have knowledge of when the transaction is
-    # committed. So in this case we register an Active Record hook using the
-    # after_commit_everywhere gem.
+    # committed. So in this case we register the hook using Active Record.
     def add_transaction_hook(conn, type, block)
       if _trans(conn)[:activerecord]
         activerecord_transaction_callback(type, &block)
@@ -130,8 +129,7 @@ def add_transaction_hook(conn, type, block)
 
     # When Active Record holds the savepoint, we cannot use Sequel hooks,
     # because Sequel doesn't have knowledge of when the savepoint is
-    # released. So in this case we register an Active Record hook using the
-    # after_commit_everywhere gem.
+    # released. So in this case we register the hook using Active Record.
     def add_savepoint_hook(conn, type, block)
       if _trans(conn)[:savepoints].last[:activerecord]
         activerecord_transaction_callback(type, &block)
@@ -145,7 +143,12 @@ def activerecord_transaction_callback(type, &block)
         activerecord_connection.current_transaction.public_send(type, &block)
       end
     else
-      require "after_commit_everywhere"
+      begin
+        gem "after_commit_everywhere", "~> 1.1"
+        require "after_commit_everywhere"
+      rescue LoadError
+        fail Error, %q(You need to add `gem "after_commit_everywhere", "~> 1.1"` to your Gemfile when using Active Record < 7.2)
+      end
 
       def activerecord_transaction_callback(type, &block)
         AfterCommitEverywhere.public_send(type, &block)

sequel-activerecord_connection.gemspec

@@ -13,7 +13,6 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "sequel", "~> 5.38"
   spec.add_dependency "activerecord", ">= 5.0", "< 8.1"
-  spec.add_dependency "after_commit_everywhere", "~> 1.1"
 
   spec.add_development_dependency "sequel_pg" unless RUBY_ENGINE == "jruby"
   spec.add_development_dependency "minitest"