This command clones the most recent version of the test-lists repository in a local directory. If the repository has been already cloned previously, this command will delete the local directory and fetch it again.

Generating a DNS data quality report

./gardener dnsreport

This command generates a dnsreport.sqlite3 database containing an entry for each URL of the test list. We will record the original file name, the file line, the URL, and the result of the DNS lookup for the URL's domain. If the DNS lookup failed, we also include the counters returned by the aggregation API for the given input URL, which provides information useful to determine whether we actually want to drop this URL from the test list.

The resolver used by this command is the same used by the Web Connectivity test helper, so its results should be consistent with the ones observed by the test helper itself.

You can interrupt this command at any time. Re-running it will only measure the unmeasured URLs as long as you keep the dnsreport.sqlite3 file around.

When done, this command produces a dnsreport.csv file containing summary information about the expired domains.

Remove the most obvious expired domains

./gardener dnsfix

This command uses the dnsreport.csv file and applies simple rules to only remove the most-safe-to-remove URLs from the test lists.