feat: add instances client library

google-cloud-run-client/lib/google/cloud/run.rb

@@ -185,6 +185,76 @@ def self.executions_available? version: :v2, transport: :grpc
         false
       end
 
+      ##
+      # Create a new client object for Instances.
+      #
+      # By default, this returns an instance of
+      # [Google::Cloud::Run::V2::Instances::Client](https://cloud.google.com/ruby/docs/reference/google-cloud-run-v2/latest/Google-Cloud-Run-V2-Instances-Client)
+      # for a gRPC client for version V2 of the API.
+      # However, you can specify a different API version by passing it in the
+      # `version` parameter. If the Instances service is
+      # supported by that API version, and the corresponding gem is available, the
+      # appropriate versioned client will be returned.
+      # You can also specify a different transport by passing `:rest` or `:grpc` in
+      # the `transport` parameter.
+      #
+      # Raises an exception if the currently installed versioned client gem for the
+      # given API version does not support the given transport of the Instances service.
+      # You can determine whether the method will succeed by calling
+      # {Google::Cloud::Run.instances_available?}.
+      #
+      # ## About Instances
+      #
+      # The Cloud Run Instances API allows you to manage Cloud Run Instances.
+      #
+      # @param version [::String, ::Symbol] The API version to connect to. Optional.
+      #   Defaults to `:v2`.
+      # @param transport [:grpc, :rest] The transport to use. Defaults to `:grpc`.
+      # @return [::Object] A client object for the specified version.
+      #
+      def self.instances version: :v2, transport: :grpc, &block
+        require "google/cloud/run/#{version.to_s.downcase}"
+
+        package_name = Google::Cloud::Run
+                       .constants
+                       .select { |sym| sym.to_s.downcase == version.to_s.downcase.tr("_", "") }
+                       .first
+        service_module = Google::Cloud::Run.const_get(package_name).const_get(:Instances)
+        service_module = service_module.const_get(:Rest) if transport == :rest
+        service_module.const_get(:Client).new(&block)
+      end
+
+      ##
+      # Determines whether the Instances service is supported by the current client.
+      # If true, you can retrieve a client object by calling {Google::Cloud::Run.instances}.
+      # If false, that method will raise an exception. This could happen if the given
+      # API version does not exist or does not support the Instances service,
+      # or if the versioned client gem needs an update to support the Instances service.
+      #
+      # @param version [::String, ::Symbol] The API version to connect to. Optional.
+      #   Defaults to `:v2`.
+      # @param transport [:grpc, :rest] The transport to use. Defaults to `:grpc`.
+      # @return [boolean] Whether the service is available.
+      #
+      def self.instances_available? version: :v2, transport: :grpc
+        require "google/cloud/run/#{version.to_s.downcase}"
+        package_name = Google::Cloud::Run
+                       .constants
+                       .select { |sym| sym.to_s.downcase == version.to_s.downcase.tr("_", "") }
+                       .first
+        return false unless package_name
+        service_module = Google::Cloud::Run.const_get package_name
+        return false unless service_module.const_defined? :Instances
+        service_module = service_module.const_get :Instances
+        if transport == :rest
+          return false unless service_module.const_defined? :Rest
+          service_module = service_module.const_get :Rest
+        end
+        service_module.const_defined? :Client
+      rescue ::LoadError
+        false
+      end
+
       ##
       # Create a new client object for Jobs.
       #

google-cloud-run-client/test/google/cloud/run/client_test.rb

@@ -83,6 +83,27 @@ def test_executions_rest
     end
   end
 
+  def test_instances_grpc
+    skip unless Google::Cloud::Run.instances_available? transport: :grpc
+    Gapic::ServiceStub.stub :new, DummyStub.new do
+      grpc_channel = GRPC::Core::Channel.new "localhost:8888", nil, :this_channel_is_insecure
+      client = Google::Cloud::Run.instances transport: :grpc do |config|
+        config.credentials = grpc_channel
+      end
+      assert_kind_of Google::Cloud::Run::V2::Instances::Client, client
+    end
+  end
+
+  def test_instances_rest
+    skip unless Google::Cloud::Run.instances_available? transport: :rest
+    Gapic::Rest::ClientStub.stub :new, DummyStub.new do
+      client = Google::Cloud::Run.instances transport: :rest do |config|
+        config.credentials = :dummy_credentials
+      end
+      assert_kind_of Google::Cloud::Run::V2::Instances::Rest::Client, client
+    end
+  end
+
   def test_jobs_grpc
     skip unless Google::Cloud::Run.jobs_available? transport: :grpc
     Gapic::ServiceStub.stub :new, DummyStub.new do