v01.config accepts and applies json patch

src/device/input/parse/v01/config.go

@@ -1,5 +1,11 @@
 package v01
 
+import (
+	"encoding/json"
+
+	patch "github.com/evanphx/json-patch/v5"
+)
+
 type config struct {
 	Feedback struct {
 		Addr   string
@@ -14,3 +20,24 @@ type config struct {
 	}
 	Quiet bool
 }
+
+func (cfg config) WithJSONPatch(v interface{}) config {
+	originalData, _ := json.Marshal(cfg)
+	patchData, err := json.Marshal(v)
+	if err != nil {
+		return cfg
+	}
+	patcher, err := patch.DecodePatch(patchData)
+	if err != nil {
+		return cfg
+	}
+	patchedData, err := patcher.Apply(originalData)
+	if err != nil {
+		return cfg
+	}
+	var patched config
+	if err := json.Unmarshal(patchedData, &patched); err != nil {
+		return cfg
+	}
+	return patched
+}