Function outputOnce

pkg/util/utils.go:35–65

outputOnce executes a function only once per unique message and function type. It uses a SHA256 hash of the formatted message to detect duplicates.

(format string, a []any, fn func(string, ...any))

// outputOnce executes a function only once per unique message and function type.
// It uses a SHA256 hash of the formatted message to detect duplicates.
func outputOnce(format string, a []any, fn func(string, ...any)) {
	// Format the message first to create the cache key
	var message string
	if a != nil {
		message = fmt.Sprintf(format, a...)
	} else {
		message = format
	}

	// Create hash of the message and function pointer to create unique cache key
	msgKey := HashSalt(message)
	fnKey := fmt.Sprintf("%p", fn) // Use function pointer as key

	outputOnceMutex.Lock()
	// Initialize the function type cache if it doesn't exist
	if outputOnceCache[fnKey] == nil {
		outputOnceCache[fnKey] = map[string]bool{}
	}

	// Check if we've already executed this message for this function type
	if outputOnceCache[fnKey][msgKey] {
		outputOnceMutex.Unlock()
		return
	}
	// Mark as shown
	outputOnceCache[fnKey][msgKey] = true
	outputOnceMutex.Unlock()

	// execute the function
	fn(format, a...)
}

// Failed will print a red error message and exit with failure.
func Failed(format string, a ...any) {