Add ability to run recipes directly from chef-client command line

chef.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "mime-types", "~> 1.25"
   s.add_dependency "mixlib-config", "~> 2.0"
-  s.add_dependency "mixlib-cli", "~> 1.3"
+  s.add_dependency "mixlib-cli", "~> 1.4"
   s.add_dependency "mixlib-log", "~> 1.3"
   s.add_dependency "mixlib-authentication", "~> 1.3"
   s.add_dependency "mixlib-shellout", "~> 1.2"

lib/chef/application.rb

@@ -196,12 +196,17 @@ def self.destroy_server_connectivity
   end
 
   # Initializes Chef::Client instance and runs it
-  def run_chef_client
+  def run_chef_client(specific_recipes = [])
     Chef::Application.setup_server_connectivity
 
+    override_runlist = config[:override_runlist]
+    if specific_recipes.size > 0
+      override_runlist ||= []
+    end
     @chef_client = Chef::Client.new(
       @chef_client_json,
-      :override_runlist => config[:override_runlist]
+      :override_runlist => config[:override_runlist],
+      :specific_recipes => specific_recipes
     )
     @chef_client_json = nil
 

lib/chef/application/client.rb

@@ -230,6 +230,8 @@ def initialize
   def reconfigure
     super
 
+    Chef::Config[:specific_recipes] = cli_arguments.map { |file| File.expand_path(file) }
+
     Chef::Config[:chef_server_url] = config[:chef_server_url] if config.has_key? :chef_server_url
 
     Chef::Config.local_mode = config[:local_mode] if config.has_key?(:local_mode)
@@ -309,7 +311,7 @@ def run_application
           Chef::Log.debug("Splay sleep #{splay} seconds")
           sleep splay
         end
-        run_chef_client
+        run_chef_client(Chef::Config[:specific_recipes])
         if Chef::Config[:interval]
           Chef::Log.debug("Sleeping for #{Chef::Config[:interval]} seconds")
           unless SELF_PIPE.empty?

lib/chef/client.rb

@@ -146,6 +146,7 @@ def initialize(json_attribs=nil, args={})
 
       @events = EventDispatch::Dispatcher.new(*event_handlers)
       @override_runlist = args.delete(:override_runlist)
+      @specific_recipes = args.delete(:specific_recipes)
       runlist_override_sanity_check!
     end
 
@@ -248,6 +249,11 @@ def setup_run_context
       run_status.run_context = run_context
 
       run_context.load(@run_list_expansion)
+      if @specific_recipes
+        @specific_recipes.each do |recipe_file|
+          run_context.load_recipe_file(recipe_file)
+        end
+      end
       assert_cookbook_path_not_empty(run_context)
       run_context
     end

lib/chef/run_context.rb

@@ -152,6 +152,17 @@ def load_recipe(recipe_name)
       end
     end
 
+    def load_recipe_file(recipe_file)
+      if !File.exist?(recipe_file)
+        raise Chef::Exceptions::RecipeNotFound, "could not find recipe file #{recipe_file}"
+      end
+
+      Chef::Log.debug("Loading Recipe File #{recipe_file}")
+      recipe = Chef::Recipe.new('@recipe_files', recipe_file, self)
+      recipe.from_file(recipe_file)
+      recipe
+    end
+
     # Looks up an attribute file given the +cookbook_name+ and
     # +attr_file_name+. Used by DSL::IncludeAttribute
     def resolve_attribute(cookbook_name, attr_file_name)

spec/integration/client/client_spec.rb

@@ -101,14 +101,87 @@
       it "should complete with success even with a client key" do
         file 'config/client.rb', <<EOM
 local_mode true
-client_key "#{path_to('mykey.pem')}"
-cookbook_path "#{path_to('cookbooks')}"
+client_key #{path_to('mykey.pem').inspect}
+cookbook_path #{path_to('cookbooks').inspect}
 EOM
 
         chef_dir = File.join(File.dirname(__FILE__), "..", "..", "..", "bin")
         result = shell_out("chef-client -c \"#{path_to('config/client.rb')}\" -o 'x::default'", :cwd => chef_dir)
         result.error!
       end
+
+      it "should run recipes specified directly on the command line" do
+        file 'config/client.rb', <<EOM
+local_mode true
+client_key #{path_to('mykey.pem').inspect}
+cookbook_path #{path_to('cookbooks').inspect}
+EOM
+
+        file 'arbitrary.rb', <<EOM
+file #{path_to('tempfile.txt').inspect} do
+  content '1'
+end
+EOM
+
+        file 'arbitrary2.rb', <<EOM
+file #{path_to('tempfile2.txt').inspect} do
+  content '2'
+end
+EOM
+
+        chef_dir = File.join(File.dirname(__FILE__), "..", "..", "..", "bin")
+        result = shell_out("chef-client -c \"#{path_to('config/client.rb')}\" #{path_to('arbitrary.rb')} #{path_to('arbitrary2.rb')}", :cwd => chef_dir)
+        result.error!
+
+        IO.read(path_to('tempfile.txt')).should == '1'
+        IO.read(path_to('tempfile2.txt')).should == '2'
+      end
+
+      it "should run recipes specified as relative paths directly on the command line" do
+        file 'config/client.rb', <<EOM
+local_mode true
+client_key #{path_to('mykey.pem').inspect}
+cookbook_path #{path_to('cookbooks').inspect}
+EOM
+
+        file 'arbitrary.rb', <<EOM
+file #{path_to('tempfile.txt').inspect} do
+  content '1'
+end
+EOM
+
+        chef_dir = File.join(File.dirname(__FILE__), "..", "..", "..", "bin")
+        result = shell_out("#{chef_dir}/chef-client -c \"#{path_to('config/client.rb')}\" arbitrary.rb", :cwd => path_to(''))
+        result.error!
+
+        IO.read(path_to('tempfile.txt')).should == '1'
+      end
+
+      it "should run recipes specified directly on the command line AFTER recipes in the run list" do
+        file 'config/client.rb', <<EOM
+local_mode true
+client_key #{path_to('mykey.pem').inspect}
+cookbook_path #{path_to('cookbooks').inspect}
+EOM
+
+        file 'cookbooks/x/recipes/constant_definition.rb', <<EOM
+class ::Blah
+  THECONSTANT = '1'
+end
+EOM
+        file 'arbitrary.rb', <<EOM
+file #{path_to('tempfile.txt').inspect} do
+  content ::Blah::THECONSTANT
+end
+EOM
+
+        chef_dir = File.join(File.dirname(__FILE__), "..", "..", "..", "bin")
+        result = shell_out("#{chef_dir}/chef-client -c \"#{path_to('config/client.rb')}\" -o x::constant_definition arbitrary.rb", :cwd => path_to(''))
+        result.error!
+
+        IO.read(path_to('tempfile.txt')).should == '1'
+      end
+
     end
 
     it "should complete with success when passed the -z flag" do

spec/unit/application/client_spec.rb

@@ -26,6 +26,7 @@
     @app.stub!(:configure_opt_parser).and_return(true)
     @app.stub!(:configure_chef).and_return(true)
     @app.stub!(:configure_logging).and_return(true)
+    @app.cli_arguments = []
     Chef::Config[:interval] = 10
 
     Chef::Config[:once] = false