Add identifier

Author: Matt Muller

gems/smithy/lib/smithy/plan.rb

@@ -7,6 +7,7 @@ class Plan
     # @param [Symbol] type The type of code to generate, either :client, :server, or :schema.
     # @param [Hash] options
     # @option options [String] :service_name The name of the service to generate code for.
+    #  Defaults to a name derived from the service shape.
     # @option options [String] :module_name The module name for clients and schemas.
     #  Defaults to the name of the service.
     # @option options [String] :gem_name The gem name for clients and schemas.

gems/smithy/lib/smithy/templates/client/client.erb

@@ -12,7 +12,8 @@ module <%= module_name %>
   class Client < Smithy::Client::Base
     include Smithy::Client::Stubs
 
-    self.service = Schema::<%= service_name %>
+    self.service = Schema::<%= service_shape %>
+    @identifier = :<%= identifier %>
 
 <% add_plugins.each do |plugin_class| -%>
     add_plugin(<%= plugin_class %>)

gems/smithy/lib/smithy/views/client/client.rb

@@ -8,7 +8,7 @@ class Client < View
         def initialize(plan, code_generated_plugins)
           @plan = plan
           @model = plan.model
-          _, @service = plan.service.first
+          @service_id, @service = plan.service.first
           @plugins = PluginList.new(plan, code_generated_plugins)
           super()
         end
@@ -27,9 +27,12 @@ def module_name
           @plan.module_name
         end
 
-        def service_name
-          id, = @plan.service.first
-          Model::Shape.name(id).camelize
+        def service_shape
+          Model::Shape.name(@service_id).camelize
+        end
+
+        def identifier
+          @plan.service_name.downcase
         end
 
         def add_plugins