fix: dont try to unmarshal into JSON if data is empty (#996)

(cherry picked from commit cb5cb98)

Author: nianyush

internal/agent/TUIcustomizationPage.go

@@ -35,8 +35,10 @@ func runCustomizationPlugins() ([]YAMLPrompt, error) {
 	var r []YAMLPrompt
 
 	bus.Manager.Response(sdk.EventInteractiveInstall, func(p *pluggable.Plugin, resp *pluggable.EventResponse) {
-		err := json.Unmarshal([]byte(resp.Data), &r)
-		if err != nil {
+		if resp.Data == "" {
+			return
+		}
+		if err := json.Unmarshal([]byte(resp.Data), &r); err != nil {
 			fmt.Println(err)
 		}
 	})

internal/agent/install.go

@@ -96,6 +96,9 @@ func Install(sourceImgURL string, dir ...string) error {
 	})
 
 	bus.Manager.Response(events.EventInstall, func(p *pluggable.Plugin, resp *pluggable.EventResponse) {
+		if resp.Data == "" {
+			return
+		}
 		err := json.Unmarshal([]byte(resp.Data), &r)
 		if err != nil {
 			fmt.Println(err)

internal/agent/reset.go

@@ -139,6 +139,9 @@ func sharedReset(reboot, unattended, resetOem bool, dir ...string) (c *config.Co
 	// This gets the options from an event that can be sent by anyone.
 	// This should override the default config as it's much more dynamic
 	bus.Manager.Response(sdk.EventBeforeReset, func(p *pluggable.Plugin, r *pluggable.EventResponse) {
+		if r.Data == "" {
+			return
+		}
 		err := json.Unmarshal([]byte(r.Data), &optionsFromEvent)
 		if err != nil {
 			fmt.Println(err)