[Command] Move ProjectDirectory into dedicated file

lib/cocoapods/command.rb

@@ -14,6 +14,9 @@ module Pod
   end
 
   class Command < CLAide::Command
+    require 'cocoapods/command/options/project_directory'
+    include Options
+
     require 'cocoapods/command/inter_process_communication'
     require 'cocoapods/command/lib'
     require 'cocoapods/command/list'
@@ -32,8 +35,6 @@ module Pod
     self.description = 'CocoaPods, the Cocoa library package manager.'
     self.plugin_prefixes = %w(claide cocoapods)
 
-    [Install, Update, Outdated, IPC::Podfile, IPC::Repl].each { |c| c.send(:include, ProjectDirectory) }
-
     def self.options
       [
         ['--silent', 'Show nothing'],

lib/cocoapods/command/inter_process_communication.rb

@@ -37,6 +37,8 @@ module Pod
       #-----------------------------------------------------------------------#
 
       class Podfile < IPC
+        include ProjectDirectory
+
         self.summary = 'Converts a Podfile to YAML'
         self.description = 'Converts a Podfile to YAML and prints it to STDOUT.'
         self.arguments = [
@@ -123,6 +125,8 @@ module Pod
       #-----------------------------------------------------------------------#
 
       class Repl < IPC
+        include ProjectDirectory
+
         END_OF_OUTPUT_SIGNAL = "\n\r"
 
         self.summary = 'The repl listens to commands on standard input'

lib/cocoapods/command/options/project_directory.rb

+module Pod
+  class Command
+    module Options
+      # Provides support for commands to take a user-specified `project directory`
+      #
+      module ProjectDirectory
+        module Options
+          def options
+            [
+              ['--project-directory=/project/dir/', 'The path to the root of the project directory'],
+            ].concat(super)
+          end
+        end
+
+        def self.included(base)
+          base.extend(Options)
+        end
+
+        def initialize(argv)
+          if project_directory = argv.option('project-directory')
+            @project_directory = Pathname.new(project_directory).expand_path
+          end
+          config.installation_root = @project_directory
+          super
+        end
+
+        def validate!
+          super
+          if @project_directory && !@project_directory.directory?
+            raise Informative, "`#{@project_directory}` is not a valid directory."
+          end
+        end
+      end
+    end
+  end
+end

lib/cocoapods/command/outdated.rb

 module Pod
   class Command
     class Outdated < Command
+      include ProjectDirectory
+
       self.summary = 'Show outdated project dependencies'
 
       self.description = <<-DESC

lib/cocoapods/command/project.rb

 module Pod
   class Command
-    # Provides support for commands to take a user-specified `project directory`
-    #
-    module ProjectDirectory
-      module Options
-        def options
-          [
-            ['--project-directory=/project/dir/', 'The path to the root of the project directory'],
-          ].concat(super)
-        end
-      end
-
-      def self.included(base)
-        base.extend(Options)
-      end
-
-      def initialize(argv)
-        if project_directory = argv.option('project-directory')
-          @project_directory = Pathname.new(project_directory).expand_path
-        end
-        config.installation_root = @project_directory
-        super
-      end
-
-      def validate!
-        super
-        if @project_directory && !@project_directory.directory?
-          raise Informative,
-                "`#{@project_directory}` is not a valid directory."
-        end
-      end
-    end
-
-    #-------------------------------------------------------------------------#
-
     class Install < Command
+      include ProjectDirectory
+
       self.summary = 'Install project dependencies to Podfile.lock versions'
 
       self.description = <<-DESC
@@ -76,6 +44,8 @@ module Pod
     #-------------------------------------------------------------------------#
 
     class Update < Command
+      include ProjectDirectory
+
       self.summary = 'Update outdated project dependencies and create new ' \
         'Podfile.lock'