In order to have dynamic fields in your Yum configuration, you can create a file, (e.g.: 'yum.repo') and use our public API for populating the fields dynamically.
Then you can deploy the file to the desired location and mark it as Filtered, and each time that a user downloads this file it will automatically get the path that it was deployed on.
So, if I were to deploy this file on "yum-local/a/b/c," the downloaded file would have the following content:
Again this can be changed according to the public API