Using info file as an atomic flag about athens HOT 4 CLOSED

I like the idea but this will also require a cache refresh otherwise we may have false positives while declaring a module version as complete.

from athens.

As long as the module/version is ever requested once, Athens will detect the absence of any of the 3 files and force cache refresh. So the only false positive would only happen to those newly cached modules/versions but never read since, which should be very rare. We can deploy the change in two stages to further reduce the chance:

Stage 1: enforce the order of saving the 3 files and have users to run go clean -modcache && go mod tidy to make sure that all active modules are complete
Stage 2: modify the Exits() function to check only the info file.

Alternatively, we can write an empty file instead, and use that as the atomic flag.

from athens.

Can we close this now @linzhp

from athens.

Yeah, with less calls to Exists() after #1842 and #1844 improving the performance, we don't need this anymore

from athens.