fix: separate golang license caches from mod dir (#2852)

Signed-off-by: Keith Zantow <kzantow@gmail.com>

internal/cache/error_resolver.go

@@ -0,0 +1,40 @@
+package cache
+
+import "fmt"
+
+// GetResolverCachingErrors returns a Resolver that caches errors and will return them
+// instead of continuing to call the provided resolve functions
+func GetResolverCachingErrors[T any](name, version string) Resolver[T] {
+	return &errorResolver[T]{
+		resolver: GetResolver[errResponse[T]](name, version),
+	}
+}
+
+type errResponse[T any] struct {
+	Error string `json:"err,omitempty"`
+	Value T      `json:"val,omitempty"`
+}
+
+type errorResolver[T any] struct {
+	resolver Resolver[errResponse[T]]
+}
+
+func (r *errorResolver[T]) Resolve(key string, resolver resolverFunc[T]) (T, error) {
+	v, err := r.resolver.Resolve(key, func() (errResponse[T], error) {
+		v, err := resolver()
+		out := errResponse[T]{
+			Value: v,
+		}
+		if err != nil {
+			out.Error = err.Error()
+		}
+		return out, nil
+	})
+	if err != nil {
+		return v.Value, err
+	}
+	if v.Error != "" {
+		return v.Value, fmt.Errorf(v.Error)
+	}
+	return v.Value, nil
+}