Rewriting a bunch of text files isn't atomic, so you need to take a planned outage or atomically rename the source dir so you don't serve 5xx errors from parsin

Rewriting a bunch of text files isn't atomic, so you need to take a planned outage or atomically rename the source dir so you don't serve 5xx errors from parsing half-written source. At that point you might as well have a deploy process, which can be as simple as "rsync && mv" into each host.