Vzlogger: fix yaml quoting not matching uuid (evcc-io#10777)

templates/definition/meter/volkszaehler-ws.yaml

@@ -17,6 +17,6 @@ render: |
   power: # power reading
     source: ws # use websocket plugin
     uri: ws://{{ .host }}:{{ .port }}/socket
-    jq: .data | select(.uuid=="{{ .uuid }}") .tuples[0][1] # parse response json
+    jq: .data | select(.uuid=={{ quote (trimAll "'" .uuid) }}) .tuples[0][1] # parse response json
     timeout: 30s
     scale: 1

templates/definition/meter/vzlogger.yaml

@@ -25,7 +25,7 @@ render: |
   power: # power reading
     source: http # use http plugin
     uri: http://{{ .host }}:{{ .port }}/
-    jq: .data[] | select(.uuid=="{{ .uuid }}") | .tuples[0][1] # parse response json
+    jq: .data[] | select(.uuid=={{ quote (trimAll "'" .uuid) }}) | .tuples[0][1] # parse response json
     {{- if .scale }}
     scale: {{ .scale }}
     {{- end }}

util/templates/render_instance.go

@@ -14,30 +14,30 @@ type Instance struct {
 }
 
 // RenderInstance renders an actual configuration instance
-func RenderInstance(class Class, other map[string]interface{}) (Instance, error) {
+func RenderInstance(class Class, other map[string]interface{}) (*Instance, error) {
 	var cc struct {
 		Template string
 		Other    map[string]interface{} `mapstructure:",remain"`
 	}
 
 	if err := util.DecodeOther(other, &cc); err != nil {
-		return *new(Instance), err
+		return nil, err
 	}
 
 	tmpl, err := ByName(class, cc.Template)
 	if err != nil {
-		return *new(Instance), err
+		return nil, err
 	}
 
 	b, _, err := tmpl.RenderResult(TemplateRenderModeInstance, other)
 	if err != nil {
-		return *new(Instance), err
+		return nil, err
 	}
 
 	var instance Instance
 	if err = yaml.Unmarshal(b, &instance); err == nil && instance.Type == "" {
 		err = errors.New("empty instance type- check for missing usage")
 	}
 
-	return instance, err
+	return &instance, err
 }

util/templates/template.go

@@ -302,6 +302,8 @@ func (t *Template) RenderResult(renderMode string, other map[string]interface{})
 			out = p.Name
 		}
 
+		// TODO move yamlQuote to explicit quoting in templates, see https://github.com/evcc-io/evcc/issues/10742
+
 		switch typed := val.(type) {
 		case []interface{}:
 			var list []string