George Kalpakas 295889ed2e ci: prevent CI cache from growing indefinitely (#41814)
Previously, the fallback key used for the CircleCI cache could match a
cache indefinitely (as long as `.bazelversion` didn't change). This
would allow the cache to grow quite large, which in turn would lead to
slow-down in CI jobs. See, also, angular/angular-cli#17533 for more
details of the impact of a growing CircleCI cache.

Unfortunately, using something like the lockfile checksum in the
fallback cache key would cause too many cache misses (esp. with
automatic updates via Renovate), again slowing CI down.

(The problem was originally discussed [here][2].)

This commit uses the technique described in [this blogpost][1] to
invalidate the cache monthly. This keeps the extra cache misses low
(essentially once per month per fork), while also preventing the cache
from growing indefinitely.

[1]: https://support.circleci.com/hc/en-us/articles/360012618473-Creating-a-daily-cache
[2]: https://github.com/angular/angular/pull/41467#discussion_r607818494

PR Close #41814
2021-04-26 11:03:10 -07:00
2020-11-18 11:11:41 -08:00
2021-04-14 09:40:17 -07:00

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