Function pruneOrphanedActionCacheEntries

pkg/cli/compile_post_processing.go:324–342

pruneOrphanedActionCacheEntries removes entries from the action cache that were not referenced during the current compilation run. This garbage-collects entries for action versions no longer used by any workflow in the target directory (e.g. old version pins left behind after bumping a `uses:` tag).

(compiler *workflow.Compiler, actionCache *workflow.ActionCache, errorCount int)

// subset of files would incorrectly prune entries still referenced by other
// (uncompiled) workflows — and only when there were zero compile errors.
func pruneOrphanedActionCacheEntries(compiler *workflow.Compiler, actionCache *workflow.ActionCache, errorCount int) {
	if actionCache == nil {
		return
	}
	if errorCount > 0 {
		return
	}

	resolver := compiler.GetSharedActionResolver()
	if resolver == nil {
		return
	}

	usedKeys := resolver.GetUsedCacheKeys()
	pruned := actionCache.PruneOrphanedEntries(usedKeys)
	if pruned > 0 {
		compilePostProcessingLog.Printf("Pruned %d orphaned entries from actions-lock.json", pruned)
	}
}