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Add note about cache eviction

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Henry Mercer
2026-05-05 18:54:16 +01:00
parent f64a4491cf
commit 09a1d9ec2a
1 changed files with 7 additions and 0 deletions
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src/overlay/caching.ts
+7
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@@ -439,6 +439,13 @@ async function getCacheKeyPrefixBase(
* Searches the GitHub Actions cache for overlay-base databases matching the given languages, and
* returns all stable CodeQL versions found across matching cache entries.
*
* Note that we do not guarantee that the cache entry for these versions of CodeQL will still be
* present by the time we attempt to restore the cache. We could achieve that with a download retry
* loop, but we expect that if there is sufficient Actions cache contention that an overlay-base
* cache entry for a particular CodeQL version is evicted before we can use it, then it is likely
* that the same thing will happen to other overlay-base cache entries, and therefore we will not be
* able to use overlay.
*
* @returns Unique stable CodeQL versions found in cached overlay-base databases, sorted from latest to
* earliest, or undefined if one of the languages is not a built-in language.
*/