Remove cucumber dependency to wire

CHANGELOG.md

@@ -14,8 +14,15 @@ Please visit [cucumber/CONTRIBUTING.md](https://github.com/cucumber/cucumber/blo
 
 ### Added
 
+- The possibility to verify if the plugin has already been installed or not. To
+  do so, use `Cucumber::Wire::Plugin.installed?`.
+  ([46](https://github.com/cucumber/cucumber-ruby-wire/pull/46))
+
 ### Changed
 
+- `cucumber-wire` is now able to install itself as a plugin into `cucumber-ruby`.
+  ([46](https://github.com/cucumber/cucumber-ruby-wire/pull/46))
+
 ### Deprecated
 
 ### Removed

Gemfile

@@ -13,5 +13,7 @@ end
 if ENV['CUCUMBER_RUBY']
   gem 'cucumber', path: ENV['CUCUMBER_RUBY']
 elsif !ENV['CUCUMBER_USE_RELEASED_GEMS']
-  gem 'cucumber', github: 'cucumber/cucumber-ruby', branch: 'main'
+  gem 'cucumber', github: 'cucumber/cucumber-ruby', branch: 'deprecate-builtin-wire'
 end
+
+gem 'aruba', github: 'cucumber/aruba', branch: 'main' # Waiting for a new release of aruba

UPGRADING.md

@@ -0,0 +1,53 @@
+# Upgrading from 6.0.1 to 6.1.0
+
+Usage of built-in wire protocol with `cucumber-ruby` will be deprecated in cucumber
+7.1.0, and removed in cucumber 8.0.0.
+
+The wire protocol will still be available by explicitely using the `cucumber-wire`
+gem.
+
+### Before cucumber 7.1.0
+
+Before cucumber 7.1.0, the wire protocol was automatically installed with cucumber,
+and automatically activated when it had detected a `.wire` file.
+
+### With cucumber 7.1.0
+
+The wire protocol will work as before, but you will notice a deprecation message.
+
+To prevent the deprecation message to be shown, add the gem `cucumber-wire` to your
+Gemfile alongside the `cucumber` one:
+
+```ruby
+# Gemfile
+
+# ...
+
+gem "cucumber"
+gem "cucumber-wire"
+
+# ...
+
+```
+
+Then install it:
+
+```shell
+bundle install
+```
+
+And add `require 'cucumber/wire'` in your support code. If you do not have support
+code yet, create a new one. For example `features/support/wire.rb`.
+
+```ruby
+# features/support/wire.rb
+require 'cucumber/wire'
+```
+
+The wire protocol will be installed, and no deprecation message will be shown anymore.
+
+### With cucumber 8.0.0
+
+The usage of the built-in wire protocol will be removed. You will have to install
+`cucumber-wire` and add `require 'cucumber/wire'` in your support code in order
+to continue using it, as explained [above](#with-cucumber-710).

features/docstring.feature

@@ -10,6 +10,10 @@ Feature: Wire protocol docstrings
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+    """
+    require 'cucumber/wire'
+    """
 
   Scenario: Run a scenario
     Given a file named "features/wired.feature" with:

features/erb_configuration.feature

@@ -12,6 +12,10 @@ Feature: ERB configuration
           Given we're all wired
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   Scenario: ERB is used in the wire file which references an environment variable that is not set
       Given a file named "features/step_definitions/server.wire" with:

features/handle_unexpected_response.feature

@@ -16,6 +16,10 @@ Feature: Handle unexpected response
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   Scenario: Unexpected response
     Given there is a wire server running on port 54321 which understands the following protocol:

features/invoke_message.feature

@@ -30,7 +30,10 @@ Feature: Invoke message
       port: 54321
 
       """
-
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   @spawn
   Scenario: Invoke a step definition which is pending

features/snippets_message.feature

@@ -17,6 +17,10 @@ Feature: Snippets message
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   @spawn
   Scenario: Wire server returns snippets for a step that didn't match

features/step_matches_message.feature

@@ -28,6 +28,10 @@ Feature: Step matches message
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   Scenario: Dry run finds no step match
     Given there is a wire server running on port 54321 which understands the following protocol:

features/table_diffing.feature

@@ -18,6 +18,10 @@ Feature: Wire protocol table diffing
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   @spawn
   Scenario: Invoke a step definition tries to diff the table and fails

features/tags.feature

@@ -10,6 +10,10 @@ Feature: Wire protocol tags
       port: 54321
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   Scenario: Run a scenario
     Given a file named "features/wired.feature" with:

features/timeouts.feature

@@ -12,6 +12,10 @@ Feature: Wire protocol timeouts
           Given we're all wired
 
       """
+    And a file named "features/step_definitions/require_wire.rb" with:
+      """
+      require 'cucumber/wire'
+      """
 
   Scenario: Try to talk to a server that's not there
     Given a file named "features/step_definitions/some_remote_place.wire" with:

lib/cucumber/wire.rb

@@ -1,5 +1,5 @@
 require 'cucumber/wire/plugin'
 
-AfterConfiguration do |config|
-  Cucumber::Wire::Plugin.new(config).install
+AfterConfiguration do |config, registry|
+  Cucumber::Wire::Plugin.new(config, registry).install
 end

lib/cucumber/wire/plugin.rb

@@ -8,6 +8,10 @@ class Plugin
       attr_reader :config, :registry
       private :config, :registry
 
+      def self.installed?
+        @@installed ||= false
+      end
+
       def initialize(config, registry)
         @config = config
         @registry = registry
@@ -18,6 +22,8 @@ def install
         config.filters << Filters::ActivateSteps.new(StepMatchSearch.new(connections.method(:step_matches), @config), @config)
         config.filters << AddHooksFilter.new(connections) unless @config.dry_run?
         config.register_snippet_generator Snippet::Generator.new(connections)
+
+        @@installed = true
       end
 
       def create_connection(wire_file)