Function isValidFileExtension

pkg/workflow/cache.go:81–94

isValidFileExtension reports whether s is a valid file extension of the form ^\.[A-Za-z0-9]+$ (e.g. ".json", ".md"). This strict pattern prevents YAML injection when extensions are embedded in generated workflow YAML as single-quoted scalars.

(s string)

// (e.g. ".json", ".md"). This strict pattern prevents YAML injection when extensions are
// embedded in generated workflow YAML as single-quoted scalars.
func isValidFileExtension(s string) bool {
	if len(s) < 2 || s[0] != '.' {
		return false
	}
	for _, c := range s[1:] {
		isLower := c >= 'a' && c <= 'z'
		isUpper := c >= 'A' && c <= 'Z'
		isDigit := c >= '0' && c <= '9'
		if !isLower && !isUpper && !isDigit {
			return false
		}
	}
	return true
}

// CacheMemoryConfig holds configuration for cache-memory functionality
type CacheMemoryConfig struct {