refactor: decouple fingerprinting from executor (#1039)

internal/fingerprint/sources_none.go

@@ -0,0 +1,23 @@
+package fingerprint
+
+import "github.com/go-task/task/v3/taskfile"
+
+// NoneChecker is a no-op Checker.
+// It will always report that the task is not up-to-date.
+type NoneChecker struct{}
+
+func (NoneChecker) IsUpToDate(t *taskfile.Task) (bool, error) {
+	return false, nil
+}
+
+func (NoneChecker) Value(t *taskfile.Task) (interface{}, error) {
+	return "", nil
+}
+
+func (NoneChecker) OnError(t *taskfile.Task) error {
+	return nil
+}
+
+func (NoneChecker) Kind() string {
+	return "none"
+}