Downstream prow monitoring stacks maintain the same directory layout under
mixins as k8s prow
This tool will:
Copy files(Except for prometheus.libsonnet, explained below) from
mixins/prometheus to
other prow instances, skip the files that don't exist in downstream prow
(Downstream prow will need to manually add the new file, which will be bumped
by this tool afterwards)
For mixins/prometheus/prometheus.libsonnet, it's essentially a file
explicitly importing other files under this directory, no change should be
expected in this file as the tool doesn't add/remove files