getxmls is no longer actively used. It was originally used to find and aggregate sources for the Add Software page.
Don't worry about it. If you want to see the code for it, it's in src/Add_Software, it consists of a google scraper, looking for a specific search phrase, scraping the results, and loading each page, looking for a passage of a specific XML format, pointing to a set of packages, and their repository sources.
-Thom