[Command::Update] Extract #verify_pods_are_installed!

Increases code readability.

lib/cocoapods/command/project.rb

@@ -73,14 +73,9 @@ module Pod
         super
       end
 
-      def run
-        verify_podfile_exists!
-
-        installer = installer_for_config
-        if @pods
-          verify_lockfile_exists!
-
       # Check if all given pods are installed
+      #
+      def verify_pods_are_installed!
         lockfile_roots = config.lockfile.pod_names.map { |p| Specification.root_name(p) }
         missing_pods = @pods.map { |p| Specification.root_name(p) }.select do |pod|
           !lockfile_roots.include?(pod)
@@ -96,7 +91,15 @@ module Pod
                     end
           raise Informative, message
         end
+      end
+
+      def run
+        verify_podfile_exists!
 
+        installer = installer_for_config
+        if @pods
+          verify_lockfile_exists!
+          verify_pods_are_installed!
           installer.update = { :pods => @pods }
         else
           UI.puts 'Update all pods'.yellow unless @pods