[Source Manager] Fix issue with source without URL

Closes #2965

CHANGELOG.md

@@ -72,6 +72,11 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
 * Fix an issue when a user doesn't yet have any spec repositories configured.  
   [Boris Bügling](https://github.com/neonichu)
 
+* Fix an issue updating repositories when another spec repository doesn't
+  have a remote.  
+  [Kyle Fuller](https://github.com/kylef)
+  [#2965](https://github.com/CocoaPods/CocoaPods/issues/2965)
+
 
 ## 0.35.0
 

lib/cocoapods/sources_manager.rb

@@ -395,7 +395,9 @@ module Pod
       #
       def source_with_url(url)
         url = url.downcase.gsub(/.git$/, '')
-        aggregate.sources.find { |s| s.url.downcase.gsub(/.git$/, '') == url }
+        aggregate.sources.find do |source|
+          source.url && source.url.downcase.gsub(/.git$/, '') == url
+        end
       end
 
       # Returns a suitable repository name for `url`.

spec/unit/sources_manager_spec.rb

@@ -205,6 +205,13 @@ module Pod
             SourcesManager.find_or_create_source_with_url('https://github.com/artsy/Specs.git').
               should == 'Source'
           end
+
+          it 'handles repositories without a remote url' do # for #2965
+            Command::Repo::Add.any_instance.stubs(:run).once
+            Source.any_instance.stubs(:url).returns(nil)
+            e = lambda { SourcesManager.find_or_create_source_with_url('url') }
+            e.should.not.raise
+          end
         end
       end
     end