[Command::Push] Add temporary foward command

lib/cocoapods/command.rb

@@ -20,6 +20,9 @@ module Pod
     require 'cocoapods/command/spec'
     require 'cocoapods/command/init'
 
+    # TODO: remove
+    require 'cocoapods/command/push'
+
     self.abstract_command = true
     self.command = 'pod'
     self.version = VERSION

lib/cocoapods/command/push.rb

+module Pod
+  class Command
+    class Push < Command
+      self.summary = 'Temporary placeholder for the `pod repo push` command'
+
+
+      def initialize(argv)
+        @push_command = Repo::Push.new(argv)
+        super
+      end
+
+      def validate!
+        UI.puts '[!] The `pod push` command has been moved to `pod repo push`.'.ansi.yellow
+        @push_command.validate!
+      end
+
+      def run
+        @push_command.run
+      end
+    end
+  end
+end