Method Set

pkg/workflow/action_cache.go:432–476

Set stores a new cache entry, preserving any already-cached inputs when the SHA is unchanged. If the SHA changes (e.g. a moving tag points to a new commit), cached inputs are cleared to stay consistent with the newly-pinned commit.

(repo, version, sha string)

// is unchanged. If the SHA changes (e.g. a moving tag points to a new commit),
// cached inputs are cleared to stay consistent with the newly-pinned commit.
func (c *ActionCache) Set(repo, version, sha string) {
	key := formatActionCacheKey(repo, version)

	// Check if there are existing entries with the same repo+SHA but different version
	for existingKey, entry := range c.Entries {
		if entry.Repo == repo && entry.SHA == sha && entry.Version != version {
			// Truncate SHA for logging (handle short SHAs in tests)
			shortSHA := sha
			if len(sha) > 8 {
				shortSHA = sha[:8]
			}
			actionCacheLog.Printf("WARNING: Adding cache entry %s with SHA %s that already exists as %s",
				key, shortSHA, existingKey)
			actionCacheLog.Printf("This may cause version comment flipping in lock files. Consider using consistent version tags.")
		}
	}

	actionCacheLog.Printf("Setting cache entry: key=%s, sha=%s", key, sha)

	// Preserve previously-cached inputs only when the SHA is unchanged. If the SHA
	// changes (e.g. for a moving tag that now points to a new commit), drop any
	// existing inputs so they stay consistent with the pinned commit.
	existing := c.Entries[key]
	var inputs map[string]*ActionYAMLInput
	var description string
	var releasedAt *time.Time
	if existing.SHA == sha {
		inputs = existing.Inputs
		description = existing.ActionDescription
		releasedAt = existing.ReleasedAt
	} else if existing.SHA != "" {
		// Log when an existing entry's SHA is being changed (covers both the case
		// where cached inputs exist and where they don't, for consistent observability).
		actionCacheLog.Printf("Clearing cached inputs for key=%s due to SHA change (%s -> %s)", key, existing.SHA, sha)
	}
	c.Entries[key] = ActionCacheEntry{
		Repo:              repo,
		Version:           version,
		SHA:               sha,
		ReleasedAt:        releasedAt,
		Inputs:            inputs,
		ActionDescription: description,
	}
	c.dirty = true // Mark cache as modified
}

// GetInputs retrieves the cached action inputs for the given repo and version.
// Returns the inputs map and true if cached inputs exist, otherwise nil and false.