Function validPattern

x/secrets/pattern.go:34–61

validPattern checks if a pattern is valid without using regexp or unicode. Rules: - Components separated by '/' - Each component is non-empty - Only characters A-Z, a-z, 0-9, '.', '-', '_' or '*' - No leading, trailing, or double slashes - Asterisks rules: - '*' cannot be mixed with other characters

(s string)

//   - '*' cannot be mixed with other characters in the same component
//   - there can be no more than two '*' per component
func validPattern(s string) bool {
	if len(s) == 0 {
		return false
	}

	componentLen := 0
	wildcardLen := 0

	for _, r := range s {
		switch {
		case r == '/':
			if !isValidComponentMatcher(componentLen, wildcardLen) {
				return false
			}
			componentLen = 0
			wildcardLen = 0
		case isValidPatternRune(r):
			componentLen++
			if r == '*' {
				wildcardLen++
			}
		default:
			return false
		}
	}
	// Final component
	return isValidComponentMatcher(componentLen, wildcardLen)
}

func isValidComponentMatcher(componentLen, wildcardLen int) bool {
	if wildcardLen > 2 {