cleaning up robocop warnings

lib/cocoapods/command/repo/push.rb

@@ -39,10 +39,7 @@ module Pod
           @allow_warnings = argv.flag?('allow-warnings')
           @local_only = argv.flag?('local-only')
           @repo = argv.shift_argument
-          begin
-            @source = config.sources_manager.source_with_name_or_url(@repo) unless @repo.nil?
-          rescue
-          end
+          @source = source_for_repo
           @source_urls = argv.option('sources', config.sources_manager.all.map(&:url).join(',')).split(',')
           @podspec = argv.shift_argument
           @use_frameworks = !argv.flag?('use-libraries')
@@ -246,6 +243,18 @@ module Pod
           podspec_files.count
         end
 
+        # Returns source for @repo
+        #
+        # @note If URL is invalid or repo doesn't exist, validate! will throw the error
+        #
+        # @return [Source]
+        #
+        def source_for_repo
+          config.sources_manager.source_with_name_or_url(@repo) unless @repo.nil?
+        rescue
+          nil
+        end
+
         #---------------------------------------------------------------------#
       end
     end

spec/functional/command/repo/push_spec.rb

@@ -16,7 +16,7 @@ module Pod
         e.message.should.match(/Unable to find the `missing_repo` repo/)
       end
     end
-    
+
     it "complains if it can't get repo url" do
       Dir.chdir(fixture('banana-lib')) do
         Command::Repo::Add.any_instance.stubs(:clone_repo)
@@ -126,7 +126,7 @@ module Pod
       Dir.chdir(@upstream) { `git checkout master -q` }
       (@upstream + 'PushTest/1.4/PushTest.podspec').read.should.include('PushTest')
     end
-    
+
     it 'successfully pushes a spec to URL' do
       cmd = command('repo', 'push', @upstream)
       Dir.chdir(@upstream) { `git checkout -b tmp_for_push -q` }