add analysis coordination (with dummy analyzer)

imgbom/scope/option.go

@@ -1,5 +1,7 @@
 package scope
 
+import "strings"
+
 const (
 	UnknownScope Option = iota
 	SquashedScope
@@ -14,6 +16,21 @@ var optionStr = []string{
 	"AllLayers",
 }
 
+var Options = []Option{
+	SquashedScope,
+	AllLayersScope,
+}
+
+func ParseOption(userStr string) Option {
+	switch strings.ToLower(userStr) {
+	case strings.ToLower(SquashedScope.String()):
+		return SquashedScope
+	case strings.ToLower(AllLayersScope.String()):
+		return AllLayersScope
+	}
+	return UnknownScope
+}
+
 func (o Option) String() string {
 	if int(o) >= len(optionStr) || int(o) < 0 {
 		return optionStr[0]