Missing source with one package from packagist.org.

[granville-dev]

• What are you trying to do?
  Set up Nexus for packagist.org

• What feature or behavior is this required for?
  While most all packages work fine, I am having a problem with drupal/coder. It is a package registered in packagist.org and it's https://repo.packagist.org/p2/drupal/coder.json shows it has a source that is not github.com and the dist value is null. When I attempt to put Nexus in place as a proxy, it downloads the metadata and for some reason it doesn't record the "source" value, which is clearly in the json file downloaded directly from packagist.org.

• Reproduce:
  Using this plugin, create a proxy for packagist.org like normal and using composer, add the nexus as a repo as normal and perform a composer require drupal/coder and see that it doesn't work because the source and dist are either not there or null.

• How could we solve this issue? (Not knowing is okay!)
  Track down why the source isn't populating properly and fix it.