Method getOldestPrebuildIDs

coderd/prebuilds/preset_snapshot.go:472–486

getOldestPrebuildIDs returns the IDs of the N oldest prebuilds, sorted by creation time. This is used when we need to delete prebuilds, ensuring we remove the oldest ones first.

(n int)

// getOldestPrebuildIDs returns the IDs of the N oldest prebuilds, sorted by creation time.
// This is used when we need to delete prebuilds, ensuring we remove the oldest ones first.
func (p PresetSnapshot) getOldestPrebuildIDs(n int) []uuid.UUID {
	// Sort by creation time, oldest first
	slices.SortFunc(p.Running, func(a, b database.GetRunningPrebuiltWorkspacesRow) int {
		return a.CreatedAt.Compare(b.CreatedAt)
	})

	// Take the first N IDs
	n = min(n, len(p.Running))
	ids := make([]uuid.UUID, n)
	for i := 0; i < n; i++ {
		ids[i] = p.Running[i].ID
	}

	return ids
}